Mouse code for the MacroRat
mbed-dev/targets/TARGET_Silicon_Labs/TARGET_EFM32/serial_api.c@46:b156ef445742, 2017-06-03 (annotated)
- Committer:
- sahilmgandhi
- Date:
- Sat Jun 03 00:22:44 2017 +0000
- Revision:
- 46:b156ef445742
- Parent:
- 18:6a4db94011d3
Final code for internal battlebot competition.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
sahilmgandhi | 18:6a4db94011d3 | 1 | /***************************************************************************//** |
sahilmgandhi | 18:6a4db94011d3 | 2 | * @file serial_api.c |
sahilmgandhi | 18:6a4db94011d3 | 3 | ******************************************************************************* |
sahilmgandhi | 18:6a4db94011d3 | 4 | * @section License |
sahilmgandhi | 18:6a4db94011d3 | 5 | * <b>(C) Copyright 2015 Silicon Labs, http://www.silabs.com</b> |
sahilmgandhi | 18:6a4db94011d3 | 6 | ******************************************************************************* |
sahilmgandhi | 18:6a4db94011d3 | 7 | * |
sahilmgandhi | 18:6a4db94011d3 | 8 | * SPDX-License-Identifier: Apache-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 9 | * |
sahilmgandhi | 18:6a4db94011d3 | 10 | * Licensed under the Apache License, Version 2.0 (the "License"); you may |
sahilmgandhi | 18:6a4db94011d3 | 11 | * not use this file except in compliance with the License. |
sahilmgandhi | 18:6a4db94011d3 | 12 | * You may obtain a copy of the License at |
sahilmgandhi | 18:6a4db94011d3 | 13 | * |
sahilmgandhi | 18:6a4db94011d3 | 14 | * http://www.apache.org/licenses/LICENSE-2.0 |
sahilmgandhi | 18:6a4db94011d3 | 15 | * |
sahilmgandhi | 18:6a4db94011d3 | 16 | * Unless required by applicable law or agreed to in writing, software |
sahilmgandhi | 18:6a4db94011d3 | 17 | * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT |
sahilmgandhi | 18:6a4db94011d3 | 18 | * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
sahilmgandhi | 18:6a4db94011d3 | 19 | * See the License for the specific language governing permissions and |
sahilmgandhi | 18:6a4db94011d3 | 20 | * limitations under the License. |
sahilmgandhi | 18:6a4db94011d3 | 21 | * |
sahilmgandhi | 18:6a4db94011d3 | 22 | ******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 23 | |
sahilmgandhi | 18:6a4db94011d3 | 24 | #include "device.h" |
sahilmgandhi | 18:6a4db94011d3 | 25 | #include "clocking.h" |
sahilmgandhi | 18:6a4db94011d3 | 26 | #if DEVICE_SERIAL |
sahilmgandhi | 18:6a4db94011d3 | 27 | |
sahilmgandhi | 18:6a4db94011d3 | 28 | #include "mbed_assert.h" |
sahilmgandhi | 18:6a4db94011d3 | 29 | #include "serial_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 30 | #include "serial_api_HAL.h" |
sahilmgandhi | 18:6a4db94011d3 | 31 | #include <string.h> |
sahilmgandhi | 18:6a4db94011d3 | 32 | #include <stdbool.h> |
sahilmgandhi | 18:6a4db94011d3 | 33 | |
sahilmgandhi | 18:6a4db94011d3 | 34 | #include "pinmap.h" |
sahilmgandhi | 18:6a4db94011d3 | 35 | #include "pinmap_function.h" |
sahilmgandhi | 18:6a4db94011d3 | 36 | #include "PeripheralPins.h" |
sahilmgandhi | 18:6a4db94011d3 | 37 | #include "PeripheralNames.h" |
sahilmgandhi | 18:6a4db94011d3 | 38 | |
sahilmgandhi | 18:6a4db94011d3 | 39 | #include "em_usart.h" |
sahilmgandhi | 18:6a4db94011d3 | 40 | #include "em_leuart.h" |
sahilmgandhi | 18:6a4db94011d3 | 41 | #include "em_cmu.h" |
sahilmgandhi | 18:6a4db94011d3 | 42 | #include "em_dma.h" |
sahilmgandhi | 18:6a4db94011d3 | 43 | #include "dma_api_HAL.h" |
sahilmgandhi | 18:6a4db94011d3 | 44 | #include "dma_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 45 | #include "sleep_api.h" |
sahilmgandhi | 18:6a4db94011d3 | 46 | #include "buffer.h" |
sahilmgandhi | 18:6a4db94011d3 | 47 | #include "sleepmodes.h" |
sahilmgandhi | 18:6a4db94011d3 | 48 | |
sahilmgandhi | 18:6a4db94011d3 | 49 | #define SERIAL_LEAST_ACTIVE_SLEEPMODE EM1 |
sahilmgandhi | 18:6a4db94011d3 | 50 | #define SERIAL_LEAST_ACTIVE_SLEEPMODE_LEUART EM2 |
sahilmgandhi | 18:6a4db94011d3 | 51 | |
sahilmgandhi | 18:6a4db94011d3 | 52 | /** Validation of LEUART register block pointer reference |
sahilmgandhi | 18:6a4db94011d3 | 53 | * for assert statements. */ |
sahilmgandhi | 18:6a4db94011d3 | 54 | #if !defined(LEUART_COUNT) |
sahilmgandhi | 18:6a4db94011d3 | 55 | #define LEUART_REF_VALID(ref) (0) |
sahilmgandhi | 18:6a4db94011d3 | 56 | #elif (LEUART_COUNT == 1) |
sahilmgandhi | 18:6a4db94011d3 | 57 | #define LEUART_REF_VALID(ref) ((ref) == LEUART0) |
sahilmgandhi | 18:6a4db94011d3 | 58 | #elif (LEUART_COUNT == 2) |
sahilmgandhi | 18:6a4db94011d3 | 59 | #define LEUART_REF_VALID(ref) (((ref) == LEUART0) || ((ref) == LEUART1)) |
sahilmgandhi | 18:6a4db94011d3 | 60 | #else |
sahilmgandhi | 18:6a4db94011d3 | 61 | #error Undefined number of low energy UARTs (LEUART). |
sahilmgandhi | 18:6a4db94011d3 | 62 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 63 | |
sahilmgandhi | 18:6a4db94011d3 | 64 | #ifndef UART_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 65 | #define UART_COUNT (0) |
sahilmgandhi | 18:6a4db94011d3 | 66 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 67 | #ifndef USART_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 68 | #define USART_COUNT (0) |
sahilmgandhi | 18:6a4db94011d3 | 69 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 70 | #ifndef LEUART_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 71 | #define LEUART_COUNT (0) |
sahilmgandhi | 18:6a4db94011d3 | 72 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 73 | |
sahilmgandhi | 18:6a4db94011d3 | 74 | #define MODULES_SIZE_SERIAL (UART_COUNT + USART_COUNT + LEUART_COUNT) |
sahilmgandhi | 18:6a4db94011d3 | 75 | |
sahilmgandhi | 18:6a4db94011d3 | 76 | /* Store IRQ id for each UART */ |
sahilmgandhi | 18:6a4db94011d3 | 77 | static uint32_t serial_irq_ids[MODULES_SIZE_SERIAL] = { 0 }; |
sahilmgandhi | 18:6a4db94011d3 | 78 | /* Interrupt handler from mbed common */ |
sahilmgandhi | 18:6a4db94011d3 | 79 | static uart_irq_handler irq_handler; |
sahilmgandhi | 18:6a4db94011d3 | 80 | /* Keep track of incoming DMA IRQ's */ |
sahilmgandhi | 18:6a4db94011d3 | 81 | static bool serial_dma_irq_fired[DMACTRL_CH_CNT] = { false }; |
sahilmgandhi | 18:6a4db94011d3 | 82 | |
sahilmgandhi | 18:6a4db94011d3 | 83 | /* Serial interface on USBTX/USBRX retargets stdio */ |
sahilmgandhi | 18:6a4db94011d3 | 84 | int stdio_uart_inited = 0; |
sahilmgandhi | 18:6a4db94011d3 | 85 | serial_t stdio_uart; |
sahilmgandhi | 18:6a4db94011d3 | 86 | |
sahilmgandhi | 18:6a4db94011d3 | 87 | static void uart_irq(UARTName, SerialIrq); |
sahilmgandhi | 18:6a4db94011d3 | 88 | static uint8_t serial_get_index(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 89 | static void serial_enable(serial_t *obj, uint8_t enable); |
sahilmgandhi | 18:6a4db94011d3 | 90 | static void serial_enable_pins(serial_t *obj, uint8_t enable); |
sahilmgandhi | 18:6a4db94011d3 | 91 | static void serial_set_route(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 92 | static IRQn_Type serial_get_rx_irq_index(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 93 | static IRQn_Type serial_get_tx_irq_index(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 94 | static CMU_Clock_TypeDef serial_get_clock(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 95 | static void serial_dmaSetupChannel(serial_t *obj, bool tx_nrx); |
sahilmgandhi | 18:6a4db94011d3 | 96 | static void serial_rx_abort_asynch_intern(serial_t *obj, int unblock_sleep); |
sahilmgandhi | 18:6a4db94011d3 | 97 | static void serial_tx_abort_asynch_intern(serial_t *obj, int unblock_sleep); |
sahilmgandhi | 18:6a4db94011d3 | 98 | static void serial_block_sleep(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 99 | static void serial_unblock_sleep(serial_t *obj); |
sahilmgandhi | 18:6a4db94011d3 | 100 | static void serial_leuart_baud(serial_t *obj, int baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 101 | |
sahilmgandhi | 18:6a4db94011d3 | 102 | /* ISRs for RX and TX events */ |
sahilmgandhi | 18:6a4db94011d3 | 103 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 104 | static void uart0_rx_irq() { uart_irq(UART_0, RxIrq); } |
sahilmgandhi | 18:6a4db94011d3 | 105 | static void uart0_tx_irq() { uart_irq(UART_0, TxIrq); USART_IntClear((USART_TypeDef*)UART_0, USART_IFC_TXC);} |
sahilmgandhi | 18:6a4db94011d3 | 106 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 107 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 108 | static void uart1_rx_irq() { uart_irq(UART_1, RxIrq); } |
sahilmgandhi | 18:6a4db94011d3 | 109 | static void uart1_tx_irq() { uart_irq(UART_1, TxIrq); USART_IntClear((USART_TypeDef*)UART_1, USART_IFC_TXC);} |
sahilmgandhi | 18:6a4db94011d3 | 110 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 111 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 112 | static void usart0_rx_irq() { uart_irq(USART_0, RxIrq); } |
sahilmgandhi | 18:6a4db94011d3 | 113 | static void usart0_tx_irq() { uart_irq(USART_0, TxIrq); USART_IntClear((USART_TypeDef*)USART_0, USART_IFC_TXC);} |
sahilmgandhi | 18:6a4db94011d3 | 114 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 115 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 116 | static void usart1_rx_irq() { uart_irq(USART_1, RxIrq); } |
sahilmgandhi | 18:6a4db94011d3 | 117 | static void usart1_tx_irq() { uart_irq(USART_1, TxIrq); USART_IntClear((USART_TypeDef*)USART_1, USART_IFC_TXC);} |
sahilmgandhi | 18:6a4db94011d3 | 118 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 119 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 120 | static void usart2_rx_irq() { uart_irq(USART_2, RxIrq); } |
sahilmgandhi | 18:6a4db94011d3 | 121 | static void usart2_tx_irq() { uart_irq(USART_2, TxIrq); USART_IntClear((USART_TypeDef*)USART_2, USART_IFC_TXC);} |
sahilmgandhi | 18:6a4db94011d3 | 122 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 123 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 124 | static void leuart0_irq() |
sahilmgandhi | 18:6a4db94011d3 | 125 | { |
sahilmgandhi | 18:6a4db94011d3 | 126 | if(LEUART_IntGetEnabled(LEUART0) & (LEUART_IF_RXDATAV | LEUART_IF_FERR | LEUART_IF_PERR | LEUART_IF_RXOF)) { |
sahilmgandhi | 18:6a4db94011d3 | 127 | uart_irq(LEUART_0, RxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 128 | } |
sahilmgandhi | 18:6a4db94011d3 | 129 | |
sahilmgandhi | 18:6a4db94011d3 | 130 | if(LEUART_IntGetEnabled(LEUART0) & (LEUART_IF_TXC | LEUART_IF_TXBL | LEUART_IF_TXOF)) { |
sahilmgandhi | 18:6a4db94011d3 | 131 | uart_irq(LEUART_0, TxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 132 | LEUART_IntClear(LEUART0, LEUART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 133 | } |
sahilmgandhi | 18:6a4db94011d3 | 134 | } |
sahilmgandhi | 18:6a4db94011d3 | 135 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 136 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 137 | static void leuart1_irq() |
sahilmgandhi | 18:6a4db94011d3 | 138 | { |
sahilmgandhi | 18:6a4db94011d3 | 139 | if(LEUART_IntGetEnabled(LEUART1) & (LEUART_IF_RXDATAV | LEUART_IF_FERR | LEUART_IF_PERR | LEUART_IF_RXOF)) { |
sahilmgandhi | 18:6a4db94011d3 | 140 | uart_irq(LEUART_1, RxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 141 | } |
sahilmgandhi | 18:6a4db94011d3 | 142 | |
sahilmgandhi | 18:6a4db94011d3 | 143 | if(LEUART_IntGetEnabled(LEUART1) & (LEUART_IF_TXC | LEUART_IF_TXBL | LEUART_IF_TXOF)) { |
sahilmgandhi | 18:6a4db94011d3 | 144 | uart_irq(LEUART_1, TxIrq); |
sahilmgandhi | 18:6a4db94011d3 | 145 | LEUART_IntClear(LEUART1, LEUART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 146 | } |
sahilmgandhi | 18:6a4db94011d3 | 147 | } |
sahilmgandhi | 18:6a4db94011d3 | 148 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 149 | |
sahilmgandhi | 18:6a4db94011d3 | 150 | /** |
sahilmgandhi | 18:6a4db94011d3 | 151 | * Initialize the UART using default settings, overridden by settings from serial object |
sahilmgandhi | 18:6a4db94011d3 | 152 | * |
sahilmgandhi | 18:6a4db94011d3 | 153 | * @param obj pointer to serial object |
sahilmgandhi | 18:6a4db94011d3 | 154 | */ |
sahilmgandhi | 18:6a4db94011d3 | 155 | static void uart_init(serial_t *obj, uint32_t baudrate, SerialParity parity, int stop_bits) |
sahilmgandhi | 18:6a4db94011d3 | 156 | { |
sahilmgandhi | 18:6a4db94011d3 | 157 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 158 | LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 159 | |
sahilmgandhi | 18:6a4db94011d3 | 160 | if (stop_bits == 2) { |
sahilmgandhi | 18:6a4db94011d3 | 161 | init.stopbits = leuartStopbits2; |
sahilmgandhi | 18:6a4db94011d3 | 162 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 163 | init.stopbits = leuartStopbits1; |
sahilmgandhi | 18:6a4db94011d3 | 164 | } |
sahilmgandhi | 18:6a4db94011d3 | 165 | |
sahilmgandhi | 18:6a4db94011d3 | 166 | switch (parity) { |
sahilmgandhi | 18:6a4db94011d3 | 167 | case ParityOdd: |
sahilmgandhi | 18:6a4db94011d3 | 168 | case ParityForced0: |
sahilmgandhi | 18:6a4db94011d3 | 169 | init.parity = leuartOddParity; |
sahilmgandhi | 18:6a4db94011d3 | 170 | break; |
sahilmgandhi | 18:6a4db94011d3 | 171 | case ParityEven: |
sahilmgandhi | 18:6a4db94011d3 | 172 | case ParityForced1: |
sahilmgandhi | 18:6a4db94011d3 | 173 | init.parity = leuartEvenParity; |
sahilmgandhi | 18:6a4db94011d3 | 174 | break; |
sahilmgandhi | 18:6a4db94011d3 | 175 | default: /* ParityNone */ |
sahilmgandhi | 18:6a4db94011d3 | 176 | init.parity = leuartNoParity; |
sahilmgandhi | 18:6a4db94011d3 | 177 | break; |
sahilmgandhi | 18:6a4db94011d3 | 178 | } |
sahilmgandhi | 18:6a4db94011d3 | 179 | |
sahilmgandhi | 18:6a4db94011d3 | 180 | init.enable = leuartDisable; |
sahilmgandhi | 18:6a4db94011d3 | 181 | init.baudrate = 9600; |
sahilmgandhi | 18:6a4db94011d3 | 182 | init.databits = leuartDatabits8; |
sahilmgandhi | 18:6a4db94011d3 | 183 | #ifdef LEUART_USING_LFXO |
sahilmgandhi | 18:6a4db94011d3 | 184 | init.refFreq = LEUART_LF_REF_FREQ; |
sahilmgandhi | 18:6a4db94011d3 | 185 | #else |
sahilmgandhi | 18:6a4db94011d3 | 186 | init.refFreq = LEUART_REF_FREQ; |
sahilmgandhi | 18:6a4db94011d3 | 187 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 188 | LEUART_Init(obj->serial.periph.leuart, &init); |
sahilmgandhi | 18:6a4db94011d3 | 189 | |
sahilmgandhi | 18:6a4db94011d3 | 190 | if (baudrate != 9600) { |
sahilmgandhi | 18:6a4db94011d3 | 191 | serial_baud(obj, baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 192 | } |
sahilmgandhi | 18:6a4db94011d3 | 193 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 194 | USART_InitAsync_TypeDef init = USART_INITASYNC_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 195 | |
sahilmgandhi | 18:6a4db94011d3 | 196 | if (stop_bits == 2) { |
sahilmgandhi | 18:6a4db94011d3 | 197 | init.stopbits = usartStopbits2; |
sahilmgandhi | 18:6a4db94011d3 | 198 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 199 | init.stopbits = usartStopbits1; |
sahilmgandhi | 18:6a4db94011d3 | 200 | } |
sahilmgandhi | 18:6a4db94011d3 | 201 | switch (parity) { |
sahilmgandhi | 18:6a4db94011d3 | 202 | case ParityOdd: |
sahilmgandhi | 18:6a4db94011d3 | 203 | case ParityForced0: |
sahilmgandhi | 18:6a4db94011d3 | 204 | init.parity = usartOddParity; |
sahilmgandhi | 18:6a4db94011d3 | 205 | break; |
sahilmgandhi | 18:6a4db94011d3 | 206 | case ParityEven: |
sahilmgandhi | 18:6a4db94011d3 | 207 | case ParityForced1: |
sahilmgandhi | 18:6a4db94011d3 | 208 | init.parity = usartEvenParity; |
sahilmgandhi | 18:6a4db94011d3 | 209 | break; |
sahilmgandhi | 18:6a4db94011d3 | 210 | default: /* ParityNone */ |
sahilmgandhi | 18:6a4db94011d3 | 211 | init.parity = usartNoParity; |
sahilmgandhi | 18:6a4db94011d3 | 212 | break; |
sahilmgandhi | 18:6a4db94011d3 | 213 | } |
sahilmgandhi | 18:6a4db94011d3 | 214 | |
sahilmgandhi | 18:6a4db94011d3 | 215 | init.enable = usartDisable; |
sahilmgandhi | 18:6a4db94011d3 | 216 | init.baudrate = baudrate; |
sahilmgandhi | 18:6a4db94011d3 | 217 | init.oversampling = usartOVS16; |
sahilmgandhi | 18:6a4db94011d3 | 218 | init.databits = usartDatabits8; |
sahilmgandhi | 18:6a4db94011d3 | 219 | init.refFreq = REFERENCE_FREQUENCY; |
sahilmgandhi | 18:6a4db94011d3 | 220 | |
sahilmgandhi | 18:6a4db94011d3 | 221 | USART_InitAsync(obj->serial.periph.uart, &init); |
sahilmgandhi | 18:6a4db94011d3 | 222 | } |
sahilmgandhi | 18:6a4db94011d3 | 223 | } |
sahilmgandhi | 18:6a4db94011d3 | 224 | /** |
sahilmgandhi | 18:6a4db94011d3 | 225 | * Get index of serial object, relating it to the physical peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 226 | * |
sahilmgandhi | 18:6a4db94011d3 | 227 | * @param obj pointer to serial peripheral (= base address of periph) |
sahilmgandhi | 18:6a4db94011d3 | 228 | * @return internal index of U(S)ART peripheral |
sahilmgandhi | 18:6a4db94011d3 | 229 | */ |
sahilmgandhi | 18:6a4db94011d3 | 230 | static inline uint8_t serial_pointer_get_index(uint32_t serial_ptr) |
sahilmgandhi | 18:6a4db94011d3 | 231 | { |
sahilmgandhi | 18:6a4db94011d3 | 232 | uint8_t index = 0; |
sahilmgandhi | 18:6a4db94011d3 | 233 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 234 | if (serial_ptr == UART_0) return index; |
sahilmgandhi | 18:6a4db94011d3 | 235 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 236 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 237 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 238 | if (serial_ptr == UART_1) return index; |
sahilmgandhi | 18:6a4db94011d3 | 239 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 240 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 241 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 242 | if (serial_ptr == USART_0) return index; |
sahilmgandhi | 18:6a4db94011d3 | 243 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 244 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 245 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 246 | if (serial_ptr == USART_1) return index; |
sahilmgandhi | 18:6a4db94011d3 | 247 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 248 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 249 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 250 | if (serial_ptr == USART_2) return index; |
sahilmgandhi | 18:6a4db94011d3 | 251 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 252 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 253 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 254 | if (serial_ptr == LEUART_0) return index; |
sahilmgandhi | 18:6a4db94011d3 | 255 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 256 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 257 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 258 | if (serial_ptr == LEUART_1) return index; |
sahilmgandhi | 18:6a4db94011d3 | 259 | index++; |
sahilmgandhi | 18:6a4db94011d3 | 260 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 261 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 262 | } |
sahilmgandhi | 18:6a4db94011d3 | 263 | |
sahilmgandhi | 18:6a4db94011d3 | 264 | /** |
sahilmgandhi | 18:6a4db94011d3 | 265 | * Get index of serial object, relating it to the physical peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 266 | * |
sahilmgandhi | 18:6a4db94011d3 | 267 | * @param obj pointer to serial object (mbed object) |
sahilmgandhi | 18:6a4db94011d3 | 268 | * @return internal index of U(S)ART peripheral |
sahilmgandhi | 18:6a4db94011d3 | 269 | */ |
sahilmgandhi | 18:6a4db94011d3 | 270 | static inline uint8_t serial_get_index(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 271 | { |
sahilmgandhi | 18:6a4db94011d3 | 272 | return serial_pointer_get_index((uint32_t)obj->serial.periph.uart); |
sahilmgandhi | 18:6a4db94011d3 | 273 | } |
sahilmgandhi | 18:6a4db94011d3 | 274 | |
sahilmgandhi | 18:6a4db94011d3 | 275 | /** |
sahilmgandhi | 18:6a4db94011d3 | 276 | * Get index of serial object RX IRQ, relating it to the physical peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 277 | * |
sahilmgandhi | 18:6a4db94011d3 | 278 | * @param obj pointer to serial object |
sahilmgandhi | 18:6a4db94011d3 | 279 | * @return internal NVIC RX IRQ index of U(S)ART peripheral |
sahilmgandhi | 18:6a4db94011d3 | 280 | */ |
sahilmgandhi | 18:6a4db94011d3 | 281 | static inline IRQn_Type serial_get_rx_irq_index(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 282 | { |
sahilmgandhi | 18:6a4db94011d3 | 283 | switch ((uint32_t)obj->serial.periph.uart) { |
sahilmgandhi | 18:6a4db94011d3 | 284 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 285 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 286 | return UART0_RX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 287 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 288 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 289 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 290 | return UART1_RX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 291 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 292 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 293 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 294 | return USART0_RX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 295 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 296 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 297 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 298 | return USART1_RX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 299 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 300 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 301 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 302 | return USART2_RX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 303 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 304 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 305 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 306 | return LEUART0_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 307 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 308 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 309 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 310 | return LEUART1_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 311 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 312 | default: |
sahilmgandhi | 18:6a4db94011d3 | 313 | MBED_ASSERT(0); |
sahilmgandhi | 18:6a4db94011d3 | 314 | } |
sahilmgandhi | 18:6a4db94011d3 | 315 | return (IRQn_Type)0; |
sahilmgandhi | 18:6a4db94011d3 | 316 | } |
sahilmgandhi | 18:6a4db94011d3 | 317 | |
sahilmgandhi | 18:6a4db94011d3 | 318 | /** |
sahilmgandhi | 18:6a4db94011d3 | 319 | * Get index of serial object TX IRQ, relating it to the physical peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 320 | * |
sahilmgandhi | 18:6a4db94011d3 | 321 | * @param obj pointer to serial object |
sahilmgandhi | 18:6a4db94011d3 | 322 | * @return internal NVIC TX IRQ index of U(S)ART peripheral |
sahilmgandhi | 18:6a4db94011d3 | 323 | */ |
sahilmgandhi | 18:6a4db94011d3 | 324 | static inline IRQn_Type serial_get_tx_irq_index(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 325 | { |
sahilmgandhi | 18:6a4db94011d3 | 326 | switch ((uint32_t)obj->serial.periph.uart) { |
sahilmgandhi | 18:6a4db94011d3 | 327 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 328 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 329 | return UART0_TX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 330 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 331 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 332 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 333 | return UART1_TX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 334 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 335 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 336 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 337 | return USART0_TX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 338 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 339 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 340 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 341 | return USART1_TX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 342 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 343 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 344 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 345 | return USART2_TX_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 346 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 347 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 348 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 349 | return LEUART0_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 350 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 351 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 352 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 353 | return LEUART1_IRQn; |
sahilmgandhi | 18:6a4db94011d3 | 354 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 355 | default: |
sahilmgandhi | 18:6a4db94011d3 | 356 | MBED_ASSERT(0); |
sahilmgandhi | 18:6a4db94011d3 | 357 | } |
sahilmgandhi | 18:6a4db94011d3 | 358 | return (IRQn_Type)0; |
sahilmgandhi | 18:6a4db94011d3 | 359 | } |
sahilmgandhi | 18:6a4db94011d3 | 360 | |
sahilmgandhi | 18:6a4db94011d3 | 361 | /** |
sahilmgandhi | 18:6a4db94011d3 | 362 | * Get clock tree for serial peripheral pointed to by obj. |
sahilmgandhi | 18:6a4db94011d3 | 363 | * |
sahilmgandhi | 18:6a4db94011d3 | 364 | * @param obj pointer to serial object |
sahilmgandhi | 18:6a4db94011d3 | 365 | * @return CMU_Clock_TypeDef for U(S)ART |
sahilmgandhi | 18:6a4db94011d3 | 366 | */ |
sahilmgandhi | 18:6a4db94011d3 | 367 | inline CMU_Clock_TypeDef serial_get_clock(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 368 | { |
sahilmgandhi | 18:6a4db94011d3 | 369 | switch ((uint32_t)obj->serial.periph.uart) { |
sahilmgandhi | 18:6a4db94011d3 | 370 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 371 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 372 | return cmuClock_UART0; |
sahilmgandhi | 18:6a4db94011d3 | 373 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 374 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 375 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 376 | return cmuClock_UART1; |
sahilmgandhi | 18:6a4db94011d3 | 377 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 378 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 379 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 380 | return cmuClock_USART0; |
sahilmgandhi | 18:6a4db94011d3 | 381 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 382 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 383 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 384 | return cmuClock_USART1; |
sahilmgandhi | 18:6a4db94011d3 | 385 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 386 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 387 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 388 | return cmuClock_USART2; |
sahilmgandhi | 18:6a4db94011d3 | 389 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 390 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 391 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 392 | return cmuClock_LEUART0; |
sahilmgandhi | 18:6a4db94011d3 | 393 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 394 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 395 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 396 | return cmuClock_LEUART1; |
sahilmgandhi | 18:6a4db94011d3 | 397 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 398 | default: |
sahilmgandhi | 18:6a4db94011d3 | 399 | return cmuClock_HFPER; |
sahilmgandhi | 18:6a4db94011d3 | 400 | } |
sahilmgandhi | 18:6a4db94011d3 | 401 | } |
sahilmgandhi | 18:6a4db94011d3 | 402 | |
sahilmgandhi | 18:6a4db94011d3 | 403 | void serial_preinit(serial_t *obj, PinName tx, PinName rx) |
sahilmgandhi | 18:6a4db94011d3 | 404 | { |
sahilmgandhi | 18:6a4db94011d3 | 405 | /* Get UART object connected to the given pins */ |
sahilmgandhi | 18:6a4db94011d3 | 406 | UARTName uart_tx = (UARTName) pinmap_peripheral(tx, PinMap_UART_TX); |
sahilmgandhi | 18:6a4db94011d3 | 407 | UARTName uart_rx = (UARTName) pinmap_peripheral(rx, PinMap_UART_RX); |
sahilmgandhi | 18:6a4db94011d3 | 408 | /* Check that pins are connected to same UART */ |
sahilmgandhi | 18:6a4db94011d3 | 409 | UARTName uart = (UARTName) pinmap_merge(uart_tx, uart_rx); |
sahilmgandhi | 18:6a4db94011d3 | 410 | MBED_ASSERT((int) uart != NC); |
sahilmgandhi | 18:6a4db94011d3 | 411 | |
sahilmgandhi | 18:6a4db94011d3 | 412 | obj->serial.periph.uart = (USART_TypeDef *) uart; |
sahilmgandhi | 18:6a4db94011d3 | 413 | |
sahilmgandhi | 18:6a4db94011d3 | 414 | /* Get location */ |
sahilmgandhi | 18:6a4db94011d3 | 415 | uint32_t uart_tx_loc = pin_location(tx, PinMap_UART_TX); |
sahilmgandhi | 18:6a4db94011d3 | 416 | uint32_t uart_rx_loc = pin_location(rx, PinMap_UART_RX); |
sahilmgandhi | 18:6a4db94011d3 | 417 | |
sahilmgandhi | 18:6a4db94011d3 | 418 | #if defined(_SILICON_LABS_32B_PLATFORM_1) |
sahilmgandhi | 18:6a4db94011d3 | 419 | /* Check that pins are used by same location for the given UART */ |
sahilmgandhi | 18:6a4db94011d3 | 420 | obj->serial.location = pinmap_merge(uart_tx_loc, uart_rx_loc); |
sahilmgandhi | 18:6a4db94011d3 | 421 | MBED_ASSERT(obj->serial.location != (uint32_t)NC); |
sahilmgandhi | 18:6a4db94011d3 | 422 | #else |
sahilmgandhi | 18:6a4db94011d3 | 423 | obj->serial.location_tx = uart_tx_loc; |
sahilmgandhi | 18:6a4db94011d3 | 424 | obj->serial.location_rx = uart_rx_loc; |
sahilmgandhi | 18:6a4db94011d3 | 425 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 426 | |
sahilmgandhi | 18:6a4db94011d3 | 427 | /* Store pins in object for easy disabling in serial_free() */ |
sahilmgandhi | 18:6a4db94011d3 | 428 | //TODO: replace all usages with AF_USARTx_TX_PORT(location) macro to save 8 bytes from struct |
sahilmgandhi | 18:6a4db94011d3 | 429 | obj->serial.rx_pin = rx; |
sahilmgandhi | 18:6a4db94011d3 | 430 | obj->serial.tx_pin = tx; |
sahilmgandhi | 18:6a4db94011d3 | 431 | |
sahilmgandhi | 18:6a4db94011d3 | 432 | /* Select interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 433 | switch ((uint32_t)obj->serial.periph.uart) { |
sahilmgandhi | 18:6a4db94011d3 | 434 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 435 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 436 | NVIC_SetVector(UART0_RX_IRQn, (uint32_t) &uart0_rx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 437 | NVIC_SetVector(UART0_TX_IRQn, (uint32_t) &uart0_tx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 438 | NVIC_SetPriority(UART0_TX_IRQn, 1); |
sahilmgandhi | 18:6a4db94011d3 | 439 | break; |
sahilmgandhi | 18:6a4db94011d3 | 440 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 441 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 442 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 443 | NVIC_SetVector(UART1_RX_IRQn, (uint32_t) &uart1_rx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 444 | NVIC_SetVector(UART1_TX_IRQn, (uint32_t) &uart1_tx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 445 | NVIC_SetPriority(UART1_TX_IRQn, 1); |
sahilmgandhi | 18:6a4db94011d3 | 446 | break; |
sahilmgandhi | 18:6a4db94011d3 | 447 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 448 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 449 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 450 | NVIC_SetVector(USART0_RX_IRQn, (uint32_t) &usart0_rx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 451 | NVIC_SetVector(USART0_TX_IRQn, (uint32_t) &usart0_tx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 452 | NVIC_SetPriority(USART0_TX_IRQn, 1); |
sahilmgandhi | 18:6a4db94011d3 | 453 | break; |
sahilmgandhi | 18:6a4db94011d3 | 454 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 455 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 456 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 457 | NVIC_SetVector(USART1_RX_IRQn, (uint32_t) &usart1_rx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 458 | NVIC_SetVector(USART1_TX_IRQn, (uint32_t) &usart1_tx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 459 | NVIC_SetPriority(USART1_TX_IRQn, 1); |
sahilmgandhi | 18:6a4db94011d3 | 460 | break; |
sahilmgandhi | 18:6a4db94011d3 | 461 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 462 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 463 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 464 | NVIC_SetVector(USART2_RX_IRQn, (uint32_t) &usart2_rx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 465 | NVIC_SetVector(USART2_TX_IRQn, (uint32_t) &usart2_tx_irq); |
sahilmgandhi | 18:6a4db94011d3 | 466 | NVIC_SetPriority(USART2_TX_IRQn, 1); |
sahilmgandhi | 18:6a4db94011d3 | 467 | break; |
sahilmgandhi | 18:6a4db94011d3 | 468 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 469 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 470 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 471 | NVIC_SetVector(LEUART0_IRQn, (uint32_t) &leuart0_irq); |
sahilmgandhi | 18:6a4db94011d3 | 472 | break; |
sahilmgandhi | 18:6a4db94011d3 | 473 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 474 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 475 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 476 | NVIC_SetVector(LEUART1_IRQn, (uint32_t) &leuart1_irq); |
sahilmgandhi | 18:6a4db94011d3 | 477 | break; |
sahilmgandhi | 18:6a4db94011d3 | 478 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 479 | } |
sahilmgandhi | 18:6a4db94011d3 | 480 | } |
sahilmgandhi | 18:6a4db94011d3 | 481 | |
sahilmgandhi | 18:6a4db94011d3 | 482 | static void serial_enable_pins(serial_t *obj, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 483 | { |
sahilmgandhi | 18:6a4db94011d3 | 484 | if (enable) { |
sahilmgandhi | 18:6a4db94011d3 | 485 | /* Configure GPIO pins*/ |
sahilmgandhi | 18:6a4db94011d3 | 486 | if(obj->serial.rx_pin != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 487 | pin_mode(obj->serial.rx_pin, Input); |
sahilmgandhi | 18:6a4db94011d3 | 488 | } |
sahilmgandhi | 18:6a4db94011d3 | 489 | /* Set DOUT first to prevent glitches */ |
sahilmgandhi | 18:6a4db94011d3 | 490 | if(obj->serial.tx_pin != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 491 | GPIO_PinOutSet((GPIO_Port_TypeDef)(obj->serial.tx_pin >> 4 & 0xF), obj->serial.tx_pin & 0xF); |
sahilmgandhi | 18:6a4db94011d3 | 492 | pin_mode(obj->serial.tx_pin, PushPull); |
sahilmgandhi | 18:6a4db94011d3 | 493 | } |
sahilmgandhi | 18:6a4db94011d3 | 494 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 495 | if(obj->serial.rx_pin != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 496 | pin_mode(obj->serial.rx_pin, Disabled); |
sahilmgandhi | 18:6a4db94011d3 | 497 | } |
sahilmgandhi | 18:6a4db94011d3 | 498 | if(obj->serial.tx_pin != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 499 | pin_mode(obj->serial.tx_pin, Disabled); |
sahilmgandhi | 18:6a4db94011d3 | 500 | } |
sahilmgandhi | 18:6a4db94011d3 | 501 | } |
sahilmgandhi | 18:6a4db94011d3 | 502 | } |
sahilmgandhi | 18:6a4db94011d3 | 503 | |
sahilmgandhi | 18:6a4db94011d3 | 504 | static void serial_set_route(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 505 | { |
sahilmgandhi | 18:6a4db94011d3 | 506 | /* Enable pins for UART at correct location */ |
sahilmgandhi | 18:6a4db94011d3 | 507 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 508 | #ifdef _LEUART_ROUTE_LOCATION_SHIFT |
sahilmgandhi | 18:6a4db94011d3 | 509 | obj->serial.periph.leuart->ROUTE = (obj->serial.location << _LEUART_ROUTE_LOCATION_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 510 | if(obj->serial.tx_pin != (uint32_t)NC) { |
sahilmgandhi | 18:6a4db94011d3 | 511 | obj->serial.periph.leuart->ROUTE |= LEUART_ROUTE_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 512 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 513 | obj->serial.periph.leuart->ROUTE &= ~LEUART_ROUTE_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 514 | } |
sahilmgandhi | 18:6a4db94011d3 | 515 | if(obj->serial.rx_pin != (uint32_t)NC) { |
sahilmgandhi | 18:6a4db94011d3 | 516 | obj->serial.periph.leuart->ROUTE |= LEUART_ROUTE_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 517 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 518 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXBLOCKEN; |
sahilmgandhi | 18:6a4db94011d3 | 519 | obj->serial.periph.leuart->ROUTE &= ~LEUART_ROUTE_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 520 | } |
sahilmgandhi | 18:6a4db94011d3 | 521 | #else |
sahilmgandhi | 18:6a4db94011d3 | 522 | if(obj->serial.location_tx != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 523 | obj->serial.periph.leuart->ROUTELOC0 = (obj->serial.periph.leuart->ROUTELOC0 & (~_LEUART_ROUTELOC0_TXLOC_MASK)) | (obj->serial.location_tx << _LEUART_ROUTELOC0_TXLOC_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 524 | obj->serial.periph.leuart->ROUTEPEN = (obj->serial.periph.leuart->ROUTEPEN & (~_LEUART_ROUTEPEN_TXPEN_MASK)) | LEUART_ROUTEPEN_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 525 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 526 | obj->serial.periph.leuart->ROUTEPEN = (obj->serial.periph.leuart->ROUTEPEN & (~_LEUART_ROUTEPEN_TXPEN_MASK)); |
sahilmgandhi | 18:6a4db94011d3 | 527 | } |
sahilmgandhi | 18:6a4db94011d3 | 528 | if(obj->serial.location_rx != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 529 | obj->serial.periph.leuart->ROUTELOC0 = (obj->serial.periph.leuart->ROUTELOC0 & (~_LEUART_ROUTELOC0_RXLOC_MASK)) | (obj->serial.location_rx << _LEUART_ROUTELOC0_RXLOC_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 530 | obj->serial.periph.leuart->ROUTEPEN = (obj->serial.periph.leuart->ROUTEPEN & (~_LEUART_ROUTEPEN_RXPEN_MASK)) | LEUART_ROUTEPEN_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 531 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 532 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXBLOCKEN; |
sahilmgandhi | 18:6a4db94011d3 | 533 | obj->serial.periph.leuart->ROUTEPEN = (obj->serial.periph.leuart->ROUTEPEN & (~_LEUART_ROUTEPEN_RXPEN_MASK)); |
sahilmgandhi | 18:6a4db94011d3 | 534 | } |
sahilmgandhi | 18:6a4db94011d3 | 535 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 536 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 537 | #ifdef _USART_ROUTE_LOCATION_SHIFT |
sahilmgandhi | 18:6a4db94011d3 | 538 | obj->serial.periph.uart->ROUTE = (obj->serial.location << _LEUART_ROUTE_LOCATION_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 539 | if(obj->serial.tx_pin != (uint32_t)NC) { |
sahilmgandhi | 18:6a4db94011d3 | 540 | obj->serial.periph.uart->ROUTE |= USART_ROUTE_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 541 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 542 | obj->serial.periph.uart->ROUTE &= ~USART_ROUTE_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 543 | } |
sahilmgandhi | 18:6a4db94011d3 | 544 | if(obj->serial.rx_pin != (uint32_t)NC) { |
sahilmgandhi | 18:6a4db94011d3 | 545 | obj->serial.periph.uart->ROUTE |= USART_ROUTE_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 546 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 547 | obj->serial.periph.uart->CMD = USART_CMD_RXBLOCKEN; |
sahilmgandhi | 18:6a4db94011d3 | 548 | obj->serial.periph.uart->ROUTE &= ~USART_ROUTE_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 549 | } |
sahilmgandhi | 18:6a4db94011d3 | 550 | #else |
sahilmgandhi | 18:6a4db94011d3 | 551 | if(obj->serial.location_tx != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 552 | obj->serial.periph.uart->ROUTELOC0 = (obj->serial.periph.uart->ROUTELOC0 & (~_USART_ROUTELOC0_TXLOC_MASK)) | (obj->serial.location_tx << _USART_ROUTELOC0_TXLOC_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 553 | obj->serial.periph.uart->ROUTEPEN = (obj->serial.periph.uart->ROUTEPEN & (~_USART_ROUTEPEN_TXPEN_MASK)) | USART_ROUTEPEN_TXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 554 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 555 | obj->serial.periph.uart->ROUTEPEN = (obj->serial.periph.uart->ROUTEPEN & (~_USART_ROUTEPEN_TXPEN_MASK)); |
sahilmgandhi | 18:6a4db94011d3 | 556 | } |
sahilmgandhi | 18:6a4db94011d3 | 557 | if(obj->serial.location_rx != NC) { |
sahilmgandhi | 18:6a4db94011d3 | 558 | obj->serial.periph.uart->ROUTELOC0 = (obj->serial.periph.uart->ROUTELOC0 & (~_USART_ROUTELOC0_RXLOC_MASK)) | (obj->serial.location_rx << _USART_ROUTELOC0_RXLOC_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 559 | obj->serial.periph.uart->ROUTEPEN = (obj->serial.periph.uart->ROUTEPEN & (~_USART_ROUTEPEN_RXPEN_MASK)) | USART_ROUTEPEN_RXPEN; |
sahilmgandhi | 18:6a4db94011d3 | 560 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 561 | obj->serial.periph.uart->CMD = USART_CMD_RXBLOCKEN; |
sahilmgandhi | 18:6a4db94011d3 | 562 | obj->serial.periph.uart->ROUTEPEN = (obj->serial.periph.uart->ROUTEPEN & (~_USART_ROUTEPEN_RXPEN_MASK)); |
sahilmgandhi | 18:6a4db94011d3 | 563 | } |
sahilmgandhi | 18:6a4db94011d3 | 564 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 565 | } |
sahilmgandhi | 18:6a4db94011d3 | 566 | } |
sahilmgandhi | 18:6a4db94011d3 | 567 | |
sahilmgandhi | 18:6a4db94011d3 | 568 | void serial_init(serial_t *obj, PinName tx, PinName rx) |
sahilmgandhi | 18:6a4db94011d3 | 569 | { |
sahilmgandhi | 18:6a4db94011d3 | 570 | serial_preinit(obj, tx, rx); |
sahilmgandhi | 18:6a4db94011d3 | 571 | |
sahilmgandhi | 18:6a4db94011d3 | 572 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 573 | // Set up LEUART clock tree |
sahilmgandhi | 18:6a4db94011d3 | 574 | #ifdef LEUART_USING_LFXO |
sahilmgandhi | 18:6a4db94011d3 | 575 | //set to use LFXO |
sahilmgandhi | 18:6a4db94011d3 | 576 | CMU_ClockEnable(cmuClock_CORELE, true); |
sahilmgandhi | 18:6a4db94011d3 | 577 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO); |
sahilmgandhi | 18:6a4db94011d3 | 578 | #else |
sahilmgandhi | 18:6a4db94011d3 | 579 | //set to use high-speed clock |
sahilmgandhi | 18:6a4db94011d3 | 580 | #ifdef _SILICON_LABS_32B_PLATFORM_2 |
sahilmgandhi | 18:6a4db94011d3 | 581 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_HFCLKLE); |
sahilmgandhi | 18:6a4db94011d3 | 582 | #else |
sahilmgandhi | 18:6a4db94011d3 | 583 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_CORELEDIV2); |
sahilmgandhi | 18:6a4db94011d3 | 584 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 585 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 586 | } |
sahilmgandhi | 18:6a4db94011d3 | 587 | |
sahilmgandhi | 18:6a4db94011d3 | 588 | CMU_ClockEnable(serial_get_clock(obj), true); |
sahilmgandhi | 18:6a4db94011d3 | 589 | |
sahilmgandhi | 18:6a4db94011d3 | 590 | /* Configure UART for async operation */ |
sahilmgandhi | 18:6a4db94011d3 | 591 | uart_init(obj, MBED_CONF_PLATFORM_DEFAULT_SERIAL_BAUD_RATE, ParityNone, 1); |
sahilmgandhi | 18:6a4db94011d3 | 592 | |
sahilmgandhi | 18:6a4db94011d3 | 593 | /* Enable pins for UART at correct location */ |
sahilmgandhi | 18:6a4db94011d3 | 594 | serial_set_route(obj); |
sahilmgandhi | 18:6a4db94011d3 | 595 | |
sahilmgandhi | 18:6a4db94011d3 | 596 | /* Reset interrupts */ |
sahilmgandhi | 18:6a4db94011d3 | 597 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 598 | obj->serial.periph.leuart->IFC = LEUART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 599 | obj->serial.periph.leuart->CTRL |= LEUART_CTRL_RXDMAWU | LEUART_CTRL_TXDMAWU; |
sahilmgandhi | 18:6a4db94011d3 | 600 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 601 | obj->serial.periph.uart->IFC = USART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 602 | } |
sahilmgandhi | 18:6a4db94011d3 | 603 | |
sahilmgandhi | 18:6a4db94011d3 | 604 | /* If this is the UART to be used for stdio, copy it to the stdio_uart struct */ |
sahilmgandhi | 18:6a4db94011d3 | 605 | if(obj == &stdio_uart) { |
sahilmgandhi | 18:6a4db94011d3 | 606 | stdio_uart_inited = 1; |
sahilmgandhi | 18:6a4db94011d3 | 607 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
sahilmgandhi | 18:6a4db94011d3 | 608 | } |
sahilmgandhi | 18:6a4db94011d3 | 609 | |
sahilmgandhi | 18:6a4db94011d3 | 610 | serial_enable_pins(obj, true); |
sahilmgandhi | 18:6a4db94011d3 | 611 | serial_enable(obj, true); |
sahilmgandhi | 18:6a4db94011d3 | 612 | |
sahilmgandhi | 18:6a4db94011d3 | 613 | obj->serial.dmaOptionsTX.dmaChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 614 | obj->serial.dmaOptionsTX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC; |
sahilmgandhi | 18:6a4db94011d3 | 615 | |
sahilmgandhi | 18:6a4db94011d3 | 616 | obj->serial.dmaOptionsRX.dmaChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 617 | obj->serial.dmaOptionsRX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC; |
sahilmgandhi | 18:6a4db94011d3 | 618 | |
sahilmgandhi | 18:6a4db94011d3 | 619 | } |
sahilmgandhi | 18:6a4db94011d3 | 620 | |
sahilmgandhi | 18:6a4db94011d3 | 621 | void serial_free(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 622 | { |
sahilmgandhi | 18:6a4db94011d3 | 623 | if( LEUART_REF_VALID(obj->serial.periph.leuart) ) { |
sahilmgandhi | 18:6a4db94011d3 | 624 | LEUART_Enable(obj->serial.periph.leuart, leuartDisable); |
sahilmgandhi | 18:6a4db94011d3 | 625 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 626 | USART_Enable(obj->serial.periph.uart, usartDisable); |
sahilmgandhi | 18:6a4db94011d3 | 627 | } |
sahilmgandhi | 18:6a4db94011d3 | 628 | serial_enable_pins(obj, false); |
sahilmgandhi | 18:6a4db94011d3 | 629 | } |
sahilmgandhi | 18:6a4db94011d3 | 630 | |
sahilmgandhi | 18:6a4db94011d3 | 631 | static void serial_enable(serial_t *obj, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 632 | { |
sahilmgandhi | 18:6a4db94011d3 | 633 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 634 | if (enable) { |
sahilmgandhi | 18:6a4db94011d3 | 635 | LEUART_Enable(obj->serial.periph.leuart, leuartEnable); |
sahilmgandhi | 18:6a4db94011d3 | 636 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 637 | LEUART_Enable(obj->serial.periph.leuart, leuartDisable); |
sahilmgandhi | 18:6a4db94011d3 | 638 | } |
sahilmgandhi | 18:6a4db94011d3 | 639 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 640 | if (enable) { |
sahilmgandhi | 18:6a4db94011d3 | 641 | USART_Enable(obj->serial.periph.uart, usartEnable); |
sahilmgandhi | 18:6a4db94011d3 | 642 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 643 | USART_Enable(obj->serial.periph.uart, usartDisable); |
sahilmgandhi | 18:6a4db94011d3 | 644 | } |
sahilmgandhi | 18:6a4db94011d3 | 645 | } |
sahilmgandhi | 18:6a4db94011d3 | 646 | serial_irq_ids[serial_get_index(obj)] = 0; |
sahilmgandhi | 18:6a4db94011d3 | 647 | } |
sahilmgandhi | 18:6a4db94011d3 | 648 | |
sahilmgandhi | 18:6a4db94011d3 | 649 | /** |
sahilmgandhi | 18:6a4db94011d3 | 650 | * Set UART baud rate |
sahilmgandhi | 18:6a4db94011d3 | 651 | */ |
sahilmgandhi | 18:6a4db94011d3 | 652 | void serial_baud(serial_t *obj, int baudrate) |
sahilmgandhi | 18:6a4db94011d3 | 653 | { |
sahilmgandhi | 18:6a4db94011d3 | 654 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 655 | serial_leuart_baud(obj, baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 656 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 657 | USART_BaudrateAsyncSet(obj->serial.periph.uart, REFERENCE_FREQUENCY, (uint32_t)baudrate, usartOVS16); |
sahilmgandhi | 18:6a4db94011d3 | 658 | } |
sahilmgandhi | 18:6a4db94011d3 | 659 | } |
sahilmgandhi | 18:6a4db94011d3 | 660 | |
sahilmgandhi | 18:6a4db94011d3 | 661 | /** |
sahilmgandhi | 18:6a4db94011d3 | 662 | * Set LEUART baud rate |
sahilmgandhi | 18:6a4db94011d3 | 663 | * Calculate whether LF or HF clock should be used. |
sahilmgandhi | 18:6a4db94011d3 | 664 | */ |
sahilmgandhi | 18:6a4db94011d3 | 665 | static void serial_leuart_baud(serial_t *obj, int baudrate) |
sahilmgandhi | 18:6a4db94011d3 | 666 | { |
sahilmgandhi | 18:6a4db94011d3 | 667 | #ifdef LEUART_USING_LFXO |
sahilmgandhi | 18:6a4db94011d3 | 668 | /* check if baudrate is within allowed range */ |
sahilmgandhi | 18:6a4db94011d3 | 669 | #if defined(_SILICON_LABS_32B_PLATFORM_2) |
sahilmgandhi | 18:6a4db94011d3 | 670 | // P2 has 9 bits + 5 fractional bits in LEUART CLKDIV register |
sahilmgandhi | 18:6a4db94011d3 | 671 | MBED_ASSERT(baudrate >= (LEUART_LF_REF_FREQ >> 9)); |
sahilmgandhi | 18:6a4db94011d3 | 672 | #else |
sahilmgandhi | 18:6a4db94011d3 | 673 | // P1 has 7 bits + 5 fractional bits in LEUART CLKDIV register |
sahilmgandhi | 18:6a4db94011d3 | 674 | MBED_ASSERT(baudrate >= (LEUART_LF_REF_FREQ >> 7)); |
sahilmgandhi | 18:6a4db94011d3 | 675 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 676 | |
sahilmgandhi | 18:6a4db94011d3 | 677 | if(baudrate > (LEUART_LF_REF_FREQ >> 1)){ |
sahilmgandhi | 18:6a4db94011d3 | 678 | // Baudrate is bigger than LFCLK/2 - we need to use the HF clock |
sahilmgandhi | 18:6a4db94011d3 | 679 | uint8_t divisor = 1; |
sahilmgandhi | 18:6a4db94011d3 | 680 | |
sahilmgandhi | 18:6a4db94011d3 | 681 | #if defined(_SILICON_LABS_32B_PLATFORM_2) |
sahilmgandhi | 18:6a4db94011d3 | 682 | /* Check if baudrate is within allowed range: (HFCLK/4096, HFCLK/2] */ |
sahilmgandhi | 18:6a4db94011d3 | 683 | MBED_ASSERT((baudrate <= (LEUART_HF_REF_FREQ >> 1)) && (baudrate > (LEUART_HF_REF_FREQ >> 12))); |
sahilmgandhi | 18:6a4db94011d3 | 684 | |
sahilmgandhi | 18:6a4db94011d3 | 685 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_HFCLKLE); |
sahilmgandhi | 18:6a4db94011d3 | 686 | |
sahilmgandhi | 18:6a4db94011d3 | 687 | if(baudrate > (LEUART_HF_REF_FREQ >> 9)){ |
sahilmgandhi | 18:6a4db94011d3 | 688 | divisor = 1; |
sahilmgandhi | 18:6a4db94011d3 | 689 | }else if(baudrate > (LEUART_HF_REF_FREQ >> 10)){ |
sahilmgandhi | 18:6a4db94011d3 | 690 | divisor = 2; |
sahilmgandhi | 18:6a4db94011d3 | 691 | }else if(baudrate > (LEUART_HF_REF_FREQ >> 11)){ |
sahilmgandhi | 18:6a4db94011d3 | 692 | divisor = 4; |
sahilmgandhi | 18:6a4db94011d3 | 693 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 694 | divisor = 8; |
sahilmgandhi | 18:6a4db94011d3 | 695 | } |
sahilmgandhi | 18:6a4db94011d3 | 696 | #else // P1 |
sahilmgandhi | 18:6a4db94011d3 | 697 | /* Check if baudrate is within allowed range */ |
sahilmgandhi | 18:6a4db94011d3 | 698 | MBED_ASSERT((baudrate <= (LEUART_HF_REF_FREQ >> 1)) && (baudrate > (LEUART_HF_REF_FREQ >> 10))); |
sahilmgandhi | 18:6a4db94011d3 | 699 | |
sahilmgandhi | 18:6a4db94011d3 | 700 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_CORELEDIV2); |
sahilmgandhi | 18:6a4db94011d3 | 701 | |
sahilmgandhi | 18:6a4db94011d3 | 702 | if(baudrate > (LEUART_HF_REF_FREQ >> 7)){ |
sahilmgandhi | 18:6a4db94011d3 | 703 | divisor = 1; |
sahilmgandhi | 18:6a4db94011d3 | 704 | }else if(baudrate > (LEUART_HF_REF_FREQ >> 8)){ |
sahilmgandhi | 18:6a4db94011d3 | 705 | divisor = 2; |
sahilmgandhi | 18:6a4db94011d3 | 706 | }else if(baudrate > (LEUART_HF_REF_FREQ >> 9)){ |
sahilmgandhi | 18:6a4db94011d3 | 707 | divisor = 4; |
sahilmgandhi | 18:6a4db94011d3 | 708 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 709 | divisor = 8; |
sahilmgandhi | 18:6a4db94011d3 | 710 | } |
sahilmgandhi | 18:6a4db94011d3 | 711 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 712 | CMU_ClockDivSet(serial_get_clock(obj), divisor); |
sahilmgandhi | 18:6a4db94011d3 | 713 | LEUART_BaudrateSet(obj->serial.periph.leuart, LEUART_HF_REF_FREQ/divisor, (uint32_t)baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 714 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 715 | CMU_ClockSelectSet(cmuClock_LFB, cmuSelect_LFXO); |
sahilmgandhi | 18:6a4db94011d3 | 716 | CMU_ClockDivSet(serial_get_clock(obj), 1); |
sahilmgandhi | 18:6a4db94011d3 | 717 | LEUART_BaudrateSet(obj->serial.periph.leuart, LEUART_LF_REF_FREQ, (uint32_t)baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 718 | } |
sahilmgandhi | 18:6a4db94011d3 | 719 | #else |
sahilmgandhi | 18:6a4db94011d3 | 720 | /* check if baudrate is within allowed range */ |
sahilmgandhi | 18:6a4db94011d3 | 721 | MBED_ASSERT((baudrate > (LEUART_REF_FREQ >> 10)) && (baudrate <= (LEUART_REF_FREQ >> 1))); |
sahilmgandhi | 18:6a4db94011d3 | 722 | uint8_t divisor = 1; |
sahilmgandhi | 18:6a4db94011d3 | 723 | if(baudrate > (LEUART_REF_FREQ >> 7)){ |
sahilmgandhi | 18:6a4db94011d3 | 724 | divisor = 1; |
sahilmgandhi | 18:6a4db94011d3 | 725 | }else if(baudrate > (LEUART_REF_FREQ >> 8)){ |
sahilmgandhi | 18:6a4db94011d3 | 726 | divisor = 2; |
sahilmgandhi | 18:6a4db94011d3 | 727 | }else if(baudrate > (LEUART_REF_FREQ >> 9)){ |
sahilmgandhi | 18:6a4db94011d3 | 728 | divisor = 4; |
sahilmgandhi | 18:6a4db94011d3 | 729 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 730 | divisor = 8; |
sahilmgandhi | 18:6a4db94011d3 | 731 | } |
sahilmgandhi | 18:6a4db94011d3 | 732 | CMU_ClockDivSet(serial_get_clock(obj), divisor); |
sahilmgandhi | 18:6a4db94011d3 | 733 | LEUART_BaudrateSet(obj->serial.periph.leuart, LEUART_REF_FREQ/divisor, (uint32_t)baudrate); |
sahilmgandhi | 18:6a4db94011d3 | 734 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 735 | } |
sahilmgandhi | 18:6a4db94011d3 | 736 | |
sahilmgandhi | 18:6a4db94011d3 | 737 | /** |
sahilmgandhi | 18:6a4db94011d3 | 738 | * Set UART format by re-initializing the peripheral. |
sahilmgandhi | 18:6a4db94011d3 | 739 | */ |
sahilmgandhi | 18:6a4db94011d3 | 740 | void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) |
sahilmgandhi | 18:6a4db94011d3 | 741 | { |
sahilmgandhi | 18:6a4db94011d3 | 742 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 743 | /* Save the serial state */ |
sahilmgandhi | 18:6a4db94011d3 | 744 | uint8_t was_enabled = LEUART_StatusGet(obj->serial.periph.leuart) & (LEUART_STATUS_TXENS | LEUART_STATUS_RXENS); |
sahilmgandhi | 18:6a4db94011d3 | 745 | uint32_t enabled_interrupts = obj->serial.periph.leuart->IEN; |
sahilmgandhi | 18:6a4db94011d3 | 746 | |
sahilmgandhi | 18:6a4db94011d3 | 747 | LEUART_Init_TypeDef init = LEUART_INIT_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 748 | |
sahilmgandhi | 18:6a4db94011d3 | 749 | /* We support 8 data bits ONLY on LEUART*/ |
sahilmgandhi | 18:6a4db94011d3 | 750 | MBED_ASSERT(data_bits == 8); |
sahilmgandhi | 18:6a4db94011d3 | 751 | |
sahilmgandhi | 18:6a4db94011d3 | 752 | /* Re-init the UART */ |
sahilmgandhi | 18:6a4db94011d3 | 753 | init.enable = (was_enabled == 0 ? leuartDisable : leuartEnable); |
sahilmgandhi | 18:6a4db94011d3 | 754 | init.baudrate = LEUART_BaudrateGet(obj->serial.periph.leuart); |
sahilmgandhi | 18:6a4db94011d3 | 755 | if (stop_bits == 2) { |
sahilmgandhi | 18:6a4db94011d3 | 756 | init.stopbits = leuartStopbits2; |
sahilmgandhi | 18:6a4db94011d3 | 757 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 758 | init.stopbits = leuartStopbits1; |
sahilmgandhi | 18:6a4db94011d3 | 759 | } |
sahilmgandhi | 18:6a4db94011d3 | 760 | switch (parity) { |
sahilmgandhi | 18:6a4db94011d3 | 761 | case ParityOdd: |
sahilmgandhi | 18:6a4db94011d3 | 762 | case ParityForced0: |
sahilmgandhi | 18:6a4db94011d3 | 763 | init.parity = leuartOddParity; |
sahilmgandhi | 18:6a4db94011d3 | 764 | break; |
sahilmgandhi | 18:6a4db94011d3 | 765 | case ParityEven: |
sahilmgandhi | 18:6a4db94011d3 | 766 | case ParityForced1: |
sahilmgandhi | 18:6a4db94011d3 | 767 | init.parity = leuartEvenParity; |
sahilmgandhi | 18:6a4db94011d3 | 768 | break; |
sahilmgandhi | 18:6a4db94011d3 | 769 | default: /* ParityNone */ |
sahilmgandhi | 18:6a4db94011d3 | 770 | init.parity = leuartNoParity; |
sahilmgandhi | 18:6a4db94011d3 | 771 | break; |
sahilmgandhi | 18:6a4db94011d3 | 772 | } |
sahilmgandhi | 18:6a4db94011d3 | 773 | |
sahilmgandhi | 18:6a4db94011d3 | 774 | LEUART_Init(obj->serial.periph.leuart, &init); |
sahilmgandhi | 18:6a4db94011d3 | 775 | |
sahilmgandhi | 18:6a4db94011d3 | 776 | /* Re-enable pins for UART at correct location */ |
sahilmgandhi | 18:6a4db94011d3 | 777 | serial_set_route(obj); |
sahilmgandhi | 18:6a4db94011d3 | 778 | |
sahilmgandhi | 18:6a4db94011d3 | 779 | /* Re-enable interrupts */ |
sahilmgandhi | 18:6a4db94011d3 | 780 | if(was_enabled != 0) { |
sahilmgandhi | 18:6a4db94011d3 | 781 | obj->serial.periph.leuart->IFC = LEUART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 782 | obj->serial.periph.leuart->IEN = enabled_interrupts; |
sahilmgandhi | 18:6a4db94011d3 | 783 | } |
sahilmgandhi | 18:6a4db94011d3 | 784 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 785 | /* Save the serial state */ |
sahilmgandhi | 18:6a4db94011d3 | 786 | uint8_t was_enabled = USART_StatusGet(obj->serial.periph.uart) & (USART_STATUS_TXENS | USART_STATUS_RXENS); |
sahilmgandhi | 18:6a4db94011d3 | 787 | uint32_t enabled_interrupts = obj->serial.periph.uart->IEN; |
sahilmgandhi | 18:6a4db94011d3 | 788 | |
sahilmgandhi | 18:6a4db94011d3 | 789 | |
sahilmgandhi | 18:6a4db94011d3 | 790 | USART_InitAsync_TypeDef init = USART_INITASYNC_DEFAULT; |
sahilmgandhi | 18:6a4db94011d3 | 791 | |
sahilmgandhi | 18:6a4db94011d3 | 792 | /* We support 4 to 8 data bits */ |
sahilmgandhi | 18:6a4db94011d3 | 793 | MBED_ASSERT(data_bits >= 4 && data_bits <= 8); |
sahilmgandhi | 18:6a4db94011d3 | 794 | |
sahilmgandhi | 18:6a4db94011d3 | 795 | /* Re-init the UART */ |
sahilmgandhi | 18:6a4db94011d3 | 796 | init.enable = (was_enabled == 0 ? usartDisable : usartEnable); |
sahilmgandhi | 18:6a4db94011d3 | 797 | init.baudrate = USART_BaudrateGet(obj->serial.periph.uart); |
sahilmgandhi | 18:6a4db94011d3 | 798 | init.oversampling = usartOVS16; |
sahilmgandhi | 18:6a4db94011d3 | 799 | init.databits = (USART_Databits_TypeDef)((data_bits - 3) << _USART_FRAME_DATABITS_SHIFT); |
sahilmgandhi | 18:6a4db94011d3 | 800 | if (stop_bits == 2) { |
sahilmgandhi | 18:6a4db94011d3 | 801 | init.stopbits = usartStopbits2; |
sahilmgandhi | 18:6a4db94011d3 | 802 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 803 | init.stopbits = usartStopbits1; |
sahilmgandhi | 18:6a4db94011d3 | 804 | } |
sahilmgandhi | 18:6a4db94011d3 | 805 | switch (parity) { |
sahilmgandhi | 18:6a4db94011d3 | 806 | case ParityOdd: |
sahilmgandhi | 18:6a4db94011d3 | 807 | case ParityForced0: |
sahilmgandhi | 18:6a4db94011d3 | 808 | init.parity = usartOddParity; |
sahilmgandhi | 18:6a4db94011d3 | 809 | break; |
sahilmgandhi | 18:6a4db94011d3 | 810 | case ParityEven: |
sahilmgandhi | 18:6a4db94011d3 | 811 | case ParityForced1: |
sahilmgandhi | 18:6a4db94011d3 | 812 | init.parity = usartEvenParity; |
sahilmgandhi | 18:6a4db94011d3 | 813 | break; |
sahilmgandhi | 18:6a4db94011d3 | 814 | default: /* ParityNone */ |
sahilmgandhi | 18:6a4db94011d3 | 815 | init.parity = usartNoParity; |
sahilmgandhi | 18:6a4db94011d3 | 816 | break; |
sahilmgandhi | 18:6a4db94011d3 | 817 | } |
sahilmgandhi | 18:6a4db94011d3 | 818 | |
sahilmgandhi | 18:6a4db94011d3 | 819 | USART_InitAsync(obj->serial.periph.uart, &init); |
sahilmgandhi | 18:6a4db94011d3 | 820 | |
sahilmgandhi | 18:6a4db94011d3 | 821 | /* Re-enable pins for UART at correct location */ |
sahilmgandhi | 18:6a4db94011d3 | 822 | serial_set_route(obj); |
sahilmgandhi | 18:6a4db94011d3 | 823 | |
sahilmgandhi | 18:6a4db94011d3 | 824 | /* Re-enable interrupts */ |
sahilmgandhi | 18:6a4db94011d3 | 825 | if(was_enabled != 0) { |
sahilmgandhi | 18:6a4db94011d3 | 826 | obj->serial.periph.uart->IFC = USART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 827 | obj->serial.periph.uart->IEN = enabled_interrupts; |
sahilmgandhi | 18:6a4db94011d3 | 828 | } |
sahilmgandhi | 18:6a4db94011d3 | 829 | } |
sahilmgandhi | 18:6a4db94011d3 | 830 | } |
sahilmgandhi | 18:6a4db94011d3 | 831 | |
sahilmgandhi | 18:6a4db94011d3 | 832 | /****************************************************************************** |
sahilmgandhi | 18:6a4db94011d3 | 833 | * INTERRUPTS * |
sahilmgandhi | 18:6a4db94011d3 | 834 | ******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 835 | uint8_t serial_tx_ready(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 836 | { |
sahilmgandhi | 18:6a4db94011d3 | 837 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 838 | return (obj->serial.periph.leuart->STATUS & LEUART_STATUS_TXBL) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 839 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 840 | return (obj->serial.periph.uart->STATUS & USART_STATUS_TXBL) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 841 | } |
sahilmgandhi | 18:6a4db94011d3 | 842 | } |
sahilmgandhi | 18:6a4db94011d3 | 843 | |
sahilmgandhi | 18:6a4db94011d3 | 844 | uint8_t serial_rx_ready(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 845 | { |
sahilmgandhi | 18:6a4db94011d3 | 846 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 847 | return (obj->serial.periph.leuart->STATUS & LEUART_STATUS_RXDATAV) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 848 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 849 | return (obj->serial.periph.uart->STATUS & USART_STATUS_RXDATAV) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 850 | } |
sahilmgandhi | 18:6a4db94011d3 | 851 | } |
sahilmgandhi | 18:6a4db94011d3 | 852 | |
sahilmgandhi | 18:6a4db94011d3 | 853 | void serial_write_asynch(serial_t *obj, int data) |
sahilmgandhi | 18:6a4db94011d3 | 854 | { |
sahilmgandhi | 18:6a4db94011d3 | 855 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 856 | obj->serial.periph.leuart->TXDATA = (uint32_t)data; |
sahilmgandhi | 18:6a4db94011d3 | 857 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 858 | obj->serial.periph.uart->TXDATA = (uint32_t)data; |
sahilmgandhi | 18:6a4db94011d3 | 859 | } |
sahilmgandhi | 18:6a4db94011d3 | 860 | } |
sahilmgandhi | 18:6a4db94011d3 | 861 | |
sahilmgandhi | 18:6a4db94011d3 | 862 | int serial_read_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 863 | { |
sahilmgandhi | 18:6a4db94011d3 | 864 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 865 | return (int)obj->serial.periph.leuart->RXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 866 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 867 | return (int)obj->serial.periph.uart->RXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 868 | } |
sahilmgandhi | 18:6a4db94011d3 | 869 | } |
sahilmgandhi | 18:6a4db94011d3 | 870 | |
sahilmgandhi | 18:6a4db94011d3 | 871 | uint8_t serial_tx_int_flag(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 872 | { |
sahilmgandhi | 18:6a4db94011d3 | 873 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 874 | return (obj->serial.periph.leuart->IF & LEUART_IF_TXBL) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 875 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 876 | return (obj->serial.periph.uart->IF & USART_IF_TXBL) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 877 | } |
sahilmgandhi | 18:6a4db94011d3 | 878 | } |
sahilmgandhi | 18:6a4db94011d3 | 879 | |
sahilmgandhi | 18:6a4db94011d3 | 880 | uint8_t serial_rx_int_flag(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 881 | { |
sahilmgandhi | 18:6a4db94011d3 | 882 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 883 | return (obj->serial.periph.leuart->IF & LEUART_IF_RXDATAV) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 884 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 885 | return (obj->serial.periph.uart->IF & USART_IF_RXDATAV) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 886 | } |
sahilmgandhi | 18:6a4db94011d3 | 887 | } |
sahilmgandhi | 18:6a4db94011d3 | 888 | |
sahilmgandhi | 18:6a4db94011d3 | 889 | void serial_read_asynch_complete(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 890 | { |
sahilmgandhi | 18:6a4db94011d3 | 891 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 892 | obj->serial.periph.leuart->IFC |= LEUART_IFC_RXOF; // in case it got full |
sahilmgandhi | 18:6a4db94011d3 | 893 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 894 | obj->serial.periph.uart->IFC |= USART_IFC_RXFULL; // in case it got full |
sahilmgandhi | 18:6a4db94011d3 | 895 | } |
sahilmgandhi | 18:6a4db94011d3 | 896 | } |
sahilmgandhi | 18:6a4db94011d3 | 897 | |
sahilmgandhi | 18:6a4db94011d3 | 898 | void serial_write_asynch_complete(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 899 | { |
sahilmgandhi | 18:6a4db94011d3 | 900 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 901 | obj->serial.periph.leuart->IFC |= LEUART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 902 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 903 | obj->serial.periph.uart->IFC |= USART_IFC_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 904 | } |
sahilmgandhi | 18:6a4db94011d3 | 905 | } |
sahilmgandhi | 18:6a4db94011d3 | 906 | |
sahilmgandhi | 18:6a4db94011d3 | 907 | /** Enable and set the interrupt handler for write (TX) |
sahilmgandhi | 18:6a4db94011d3 | 908 | * |
sahilmgandhi | 18:6a4db94011d3 | 909 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 910 | * @param address The address of TX handler |
sahilmgandhi | 18:6a4db94011d3 | 911 | * @param enable Set to non-zero to enable or zero to disable |
sahilmgandhi | 18:6a4db94011d3 | 912 | */ |
sahilmgandhi | 18:6a4db94011d3 | 913 | void serial_write_enable_interrupt(serial_t *obj, uint32_t address, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 914 | { |
sahilmgandhi | 18:6a4db94011d3 | 915 | NVIC_SetVector(serial_get_tx_irq_index(obj), address); |
sahilmgandhi | 18:6a4db94011d3 | 916 | serial_irq_set(obj, (SerialIrq)1, enable); |
sahilmgandhi | 18:6a4db94011d3 | 917 | } |
sahilmgandhi | 18:6a4db94011d3 | 918 | |
sahilmgandhi | 18:6a4db94011d3 | 919 | /** Enable and set the interrupt handler for read (RX) |
sahilmgandhi | 18:6a4db94011d3 | 920 | * |
sahilmgandhi | 18:6a4db94011d3 | 921 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 922 | * @param address The address of RX handler |
sahilmgandhi | 18:6a4db94011d3 | 923 | * @param enable Set to non-zero to enable or zero to disable |
sahilmgandhi | 18:6a4db94011d3 | 924 | */ |
sahilmgandhi | 18:6a4db94011d3 | 925 | void serial_read_enable_interrupt(serial_t *obj, uint32_t address, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 926 | { |
sahilmgandhi | 18:6a4db94011d3 | 927 | NVIC_SetVector(serial_get_rx_irq_index(obj), address); |
sahilmgandhi | 18:6a4db94011d3 | 928 | serial_irq_set(obj, (SerialIrq)0, enable); |
sahilmgandhi | 18:6a4db94011d3 | 929 | } |
sahilmgandhi | 18:6a4db94011d3 | 930 | |
sahilmgandhi | 18:6a4db94011d3 | 931 | uint8_t serial_interrupt_enabled(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 932 | { |
sahilmgandhi | 18:6a4db94011d3 | 933 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 934 | return (obj->serial.periph.leuart->IEN & (LEUART_IEN_RXDATAV | LEUART_IEN_TXBL)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 935 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 936 | return (obj->serial.periph.uart->IEN & (USART_IEN_RXDATAV | USART_IEN_TXBL)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 937 | } |
sahilmgandhi | 18:6a4db94011d3 | 938 | } |
sahilmgandhi | 18:6a4db94011d3 | 939 | |
sahilmgandhi | 18:6a4db94011d3 | 940 | /** |
sahilmgandhi | 18:6a4db94011d3 | 941 | * Set handler for all serial interrupts (is probably SerialBase::_handler()) |
sahilmgandhi | 18:6a4db94011d3 | 942 | * and store IRQ ID to be returned to the handler upon interrupt. ID is |
sahilmgandhi | 18:6a4db94011d3 | 943 | * probably a pointer to the calling Serial object. |
sahilmgandhi | 18:6a4db94011d3 | 944 | */ |
sahilmgandhi | 18:6a4db94011d3 | 945 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) |
sahilmgandhi | 18:6a4db94011d3 | 946 | { |
sahilmgandhi | 18:6a4db94011d3 | 947 | irq_handler = handler; |
sahilmgandhi | 18:6a4db94011d3 | 948 | serial_irq_ids[serial_get_index(obj)] = id; |
sahilmgandhi | 18:6a4db94011d3 | 949 | } |
sahilmgandhi | 18:6a4db94011d3 | 950 | |
sahilmgandhi | 18:6a4db94011d3 | 951 | /** |
sahilmgandhi | 18:6a4db94011d3 | 952 | * Generic ISR for all UARTs, both TX and RX |
sahilmgandhi | 18:6a4db94011d3 | 953 | */ |
sahilmgandhi | 18:6a4db94011d3 | 954 | static void uart_irq(UARTName name, SerialIrq irq) |
sahilmgandhi | 18:6a4db94011d3 | 955 | { |
sahilmgandhi | 18:6a4db94011d3 | 956 | uint8_t index = serial_pointer_get_index((uint32_t)name); |
sahilmgandhi | 18:6a4db94011d3 | 957 | if (serial_irq_ids[index] != 0) { |
sahilmgandhi | 18:6a4db94011d3 | 958 | /* Pass interrupt on to mbed common handler */ |
sahilmgandhi | 18:6a4db94011d3 | 959 | irq_handler(serial_irq_ids[index], irq); |
sahilmgandhi | 18:6a4db94011d3 | 960 | /* Clearing interrupt not necessary */ |
sahilmgandhi | 18:6a4db94011d3 | 961 | } |
sahilmgandhi | 18:6a4db94011d3 | 962 | } |
sahilmgandhi | 18:6a4db94011d3 | 963 | |
sahilmgandhi | 18:6a4db94011d3 | 964 | /** |
sahilmgandhi | 18:6a4db94011d3 | 965 | * Set ISR for a given UART and interrupt event (TX or RX) |
sahilmgandhi | 18:6a4db94011d3 | 966 | */ |
sahilmgandhi | 18:6a4db94011d3 | 967 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 968 | { |
sahilmgandhi | 18:6a4db94011d3 | 969 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 970 | /* Enable or disable interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 971 | if (enable) { |
sahilmgandhi | 18:6a4db94011d3 | 972 | if (irq == RxIrq) { /* RX */ |
sahilmgandhi | 18:6a4db94011d3 | 973 | obj->serial.periph.leuart->IEN |= LEUART_IEN_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 974 | NVIC_ClearPendingIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 975 | NVIC_EnableIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 976 | } else { /* TX */ |
sahilmgandhi | 18:6a4db94011d3 | 977 | obj->serial.periph.leuart->IEN |= LEUART_IEN_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 978 | NVIC_ClearPendingIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 979 | NVIC_SetPriority(serial_get_tx_irq_index(obj), 1); |
sahilmgandhi | 18:6a4db94011d3 | 980 | NVIC_EnableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 981 | } |
sahilmgandhi | 18:6a4db94011d3 | 982 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 983 | if (irq == RxIrq) { /* RX */ |
sahilmgandhi | 18:6a4db94011d3 | 984 | obj->serial.periph.leuart->IEN &= ~LEUART_IEN_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 985 | NVIC_DisableIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 986 | } else { /* TX */ |
sahilmgandhi | 18:6a4db94011d3 | 987 | obj->serial.periph.leuart->IEN &= ~LEUART_IEN_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 988 | NVIC_DisableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 989 | } |
sahilmgandhi | 18:6a4db94011d3 | 990 | } |
sahilmgandhi | 18:6a4db94011d3 | 991 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 992 | /* Enable or disable interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 993 | if (enable) { |
sahilmgandhi | 18:6a4db94011d3 | 994 | if (irq == RxIrq) { /* RX */ |
sahilmgandhi | 18:6a4db94011d3 | 995 | obj->serial.periph.uart->IEN |= USART_IEN_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 996 | NVIC_ClearPendingIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 997 | NVIC_EnableIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 998 | } else { /* TX */ |
sahilmgandhi | 18:6a4db94011d3 | 999 | obj->serial.periph.uart->IEN |= USART_IEN_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 1000 | NVIC_ClearPendingIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1001 | NVIC_SetPriority(serial_get_tx_irq_index(obj), 1); |
sahilmgandhi | 18:6a4db94011d3 | 1002 | NVIC_EnableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1003 | } |
sahilmgandhi | 18:6a4db94011d3 | 1004 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1005 | if (irq == RxIrq) { /* RX */ |
sahilmgandhi | 18:6a4db94011d3 | 1006 | obj->serial.periph.uart->IEN &= ~USART_IEN_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1007 | NVIC_DisableIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1008 | } else { /* TX */ |
sahilmgandhi | 18:6a4db94011d3 | 1009 | obj->serial.periph.uart->IEN &= ~USART_IEN_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 1010 | NVIC_DisableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1011 | } |
sahilmgandhi | 18:6a4db94011d3 | 1012 | } |
sahilmgandhi | 18:6a4db94011d3 | 1013 | } |
sahilmgandhi | 18:6a4db94011d3 | 1014 | } |
sahilmgandhi | 18:6a4db94011d3 | 1015 | |
sahilmgandhi | 18:6a4db94011d3 | 1016 | /****************************************************************************** |
sahilmgandhi | 18:6a4db94011d3 | 1017 | * READ/WRITE * |
sahilmgandhi | 18:6a4db94011d3 | 1018 | ******************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1019 | |
sahilmgandhi | 18:6a4db94011d3 | 1020 | /** |
sahilmgandhi | 18:6a4db94011d3 | 1021 | * Get one char from serial link |
sahilmgandhi | 18:6a4db94011d3 | 1022 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1023 | int serial_getc(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1024 | { |
sahilmgandhi | 18:6a4db94011d3 | 1025 | /* Emlib USART_Rx blocks until data is available, so we don't need to use |
sahilmgandhi | 18:6a4db94011d3 | 1026 | * serial_readable(). Use USART_RxDataGet() to read register directly. */ |
sahilmgandhi | 18:6a4db94011d3 | 1027 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1028 | return LEUART_Rx(obj->serial.periph.leuart); |
sahilmgandhi | 18:6a4db94011d3 | 1029 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1030 | return USART_Rx(obj->serial.periph.uart); |
sahilmgandhi | 18:6a4db94011d3 | 1031 | } |
sahilmgandhi | 18:6a4db94011d3 | 1032 | } |
sahilmgandhi | 18:6a4db94011d3 | 1033 | |
sahilmgandhi | 18:6a4db94011d3 | 1034 | /* |
sahilmgandhi | 18:6a4db94011d3 | 1035 | * Send one char over serial link |
sahilmgandhi | 18:6a4db94011d3 | 1036 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1037 | void serial_putc(serial_t *obj, int c) |
sahilmgandhi | 18:6a4db94011d3 | 1038 | { |
sahilmgandhi | 18:6a4db94011d3 | 1039 | /* Emlib USART_Tx blocks until buffer is writable (non-full), so we don't |
sahilmgandhi | 18:6a4db94011d3 | 1040 | * need to use serial_writable(). */ |
sahilmgandhi | 18:6a4db94011d3 | 1041 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1042 | LEUART_Tx(obj->serial.periph.leuart, (uint8_t)(c)); |
sahilmgandhi | 18:6a4db94011d3 | 1043 | while (!(obj->serial.periph.leuart->STATUS & LEUART_STATUS_TXC)); |
sahilmgandhi | 18:6a4db94011d3 | 1044 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1045 | USART_Tx(obj->serial.periph.uart, (uint8_t)(c)); |
sahilmgandhi | 18:6a4db94011d3 | 1046 | while (!(obj->serial.periph.uart->STATUS & USART_STATUS_TXC)); |
sahilmgandhi | 18:6a4db94011d3 | 1047 | } |
sahilmgandhi | 18:6a4db94011d3 | 1048 | } |
sahilmgandhi | 18:6a4db94011d3 | 1049 | |
sahilmgandhi | 18:6a4db94011d3 | 1050 | /** |
sahilmgandhi | 18:6a4db94011d3 | 1051 | * Check if data is available in RX data vector |
sahilmgandhi | 18:6a4db94011d3 | 1052 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1053 | int serial_readable(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1054 | { |
sahilmgandhi | 18:6a4db94011d3 | 1055 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1056 | return obj->serial.periph.leuart->STATUS & LEUART_STATUS_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1057 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1058 | return obj->serial.periph.uart->STATUS & USART_STATUS_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1059 | } |
sahilmgandhi | 18:6a4db94011d3 | 1060 | } |
sahilmgandhi | 18:6a4db94011d3 | 1061 | |
sahilmgandhi | 18:6a4db94011d3 | 1062 | /** |
sahilmgandhi | 18:6a4db94011d3 | 1063 | * Check if TX buffer is empty |
sahilmgandhi | 18:6a4db94011d3 | 1064 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1065 | int serial_writable(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1066 | { |
sahilmgandhi | 18:6a4db94011d3 | 1067 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1068 | return obj->serial.periph.leuart->STATUS & LEUART_STATUS_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1069 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1070 | return obj->serial.periph.uart->STATUS & USART_STATUS_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1071 | } |
sahilmgandhi | 18:6a4db94011d3 | 1072 | } |
sahilmgandhi | 18:6a4db94011d3 | 1073 | |
sahilmgandhi | 18:6a4db94011d3 | 1074 | /** |
sahilmgandhi | 18:6a4db94011d3 | 1075 | * Clear UART interrupts |
sahilmgandhi | 18:6a4db94011d3 | 1076 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1077 | void serial_clear(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1078 | { |
sahilmgandhi | 18:6a4db94011d3 | 1079 | /* Interrupts automatically clear when condition is not met anymore */ |
sahilmgandhi | 18:6a4db94011d3 | 1080 | } |
sahilmgandhi | 18:6a4db94011d3 | 1081 | |
sahilmgandhi | 18:6a4db94011d3 | 1082 | void serial_break_set(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1083 | { |
sahilmgandhi | 18:6a4db94011d3 | 1084 | /* Send transmission break */ |
sahilmgandhi | 18:6a4db94011d3 | 1085 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1086 | obj->serial.periph.leuart->TXDATAX = LEUART_TXDATAX_TXBREAK; |
sahilmgandhi | 18:6a4db94011d3 | 1087 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1088 | obj->serial.periph.uart->TXDATAX = USART_TXDATAX_TXBREAK; |
sahilmgandhi | 18:6a4db94011d3 | 1089 | } |
sahilmgandhi | 18:6a4db94011d3 | 1090 | } |
sahilmgandhi | 18:6a4db94011d3 | 1091 | |
sahilmgandhi | 18:6a4db94011d3 | 1092 | void serial_break_clear(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1093 | { |
sahilmgandhi | 18:6a4db94011d3 | 1094 | /* No need to clear break, it is automatically cleared after one frame. |
sahilmgandhi | 18:6a4db94011d3 | 1095 | * From the reference manual: |
sahilmgandhi | 18:6a4db94011d3 | 1096 | * |
sahilmgandhi | 18:6a4db94011d3 | 1097 | * By setting TXBREAK, the output will be held low during the stop-bit |
sahilmgandhi | 18:6a4db94011d3 | 1098 | * period to generate a framing error. A receiver that supports break |
sahilmgandhi | 18:6a4db94011d3 | 1099 | * detection detects this state, allowing it to be used e.g. for framing |
sahilmgandhi | 18:6a4db94011d3 | 1100 | * of larger data packets. The line is driven high before the next frame |
sahilmgandhi | 18:6a4db94011d3 | 1101 | * is transmitted so the next start condition can be identified correctly |
sahilmgandhi | 18:6a4db94011d3 | 1102 | * by the recipient. Continuous breaks lasting longer than a USART frame |
sahilmgandhi | 18:6a4db94011d3 | 1103 | * are thus not supported by the USART. GPIO can be used for this. |
sahilmgandhi | 18:6a4db94011d3 | 1104 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1105 | } |
sahilmgandhi | 18:6a4db94011d3 | 1106 | |
sahilmgandhi | 18:6a4db94011d3 | 1107 | void serial_pinout_tx(PinName tx) |
sahilmgandhi | 18:6a4db94011d3 | 1108 | { |
sahilmgandhi | 18:6a4db94011d3 | 1109 | /* 0x10 sets DOUT high. Prevents false start. */ |
sahilmgandhi | 18:6a4db94011d3 | 1110 | pin_mode(tx, PushPull | 0x10); |
sahilmgandhi | 18:6a4db94011d3 | 1111 | } |
sahilmgandhi | 18:6a4db94011d3 | 1112 | |
sahilmgandhi | 18:6a4db94011d3 | 1113 | /************************************************************************************ |
sahilmgandhi | 18:6a4db94011d3 | 1114 | * DMA helper functions * |
sahilmgandhi | 18:6a4db94011d3 | 1115 | ************************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1116 | /****************************************** |
sahilmgandhi | 18:6a4db94011d3 | 1117 | * static void serial_dmaTransferComplete(uint channel, bool primary, void* user) |
sahilmgandhi | 18:6a4db94011d3 | 1118 | * |
sahilmgandhi | 18:6a4db94011d3 | 1119 | * Callback function which gets called upon DMA transfer completion |
sahilmgandhi | 18:6a4db94011d3 | 1120 | * the user-defined pointer is pointing to the CPP-land thunk |
sahilmgandhi | 18:6a4db94011d3 | 1121 | ******************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1122 | static void serial_dmaTransferComplete(unsigned int channel, bool primary, void *user) |
sahilmgandhi | 18:6a4db94011d3 | 1123 | { |
sahilmgandhi | 18:6a4db94011d3 | 1124 | /* Store information about which channel triggered because CPP doesn't take arguments */ |
sahilmgandhi | 18:6a4db94011d3 | 1125 | serial_dma_irq_fired[channel] = true; |
sahilmgandhi | 18:6a4db94011d3 | 1126 | |
sahilmgandhi | 18:6a4db94011d3 | 1127 | /* User pointer should be a thunk to CPP land */ |
sahilmgandhi | 18:6a4db94011d3 | 1128 | if (user != NULL) { |
sahilmgandhi | 18:6a4db94011d3 | 1129 | ((DMACallback)user)(); |
sahilmgandhi | 18:6a4db94011d3 | 1130 | } |
sahilmgandhi | 18:6a4db94011d3 | 1131 | } |
sahilmgandhi | 18:6a4db94011d3 | 1132 | |
sahilmgandhi | 18:6a4db94011d3 | 1133 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 1134 | |
sahilmgandhi | 18:6a4db94011d3 | 1135 | /****************************************** |
sahilmgandhi | 18:6a4db94011d3 | 1136 | * static void serial_setupDmaChannel(serial_t *obj, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1137 | * |
sahilmgandhi | 18:6a4db94011d3 | 1138 | * Sets up the DMA configuration block for the assigned channel |
sahilmgandhi | 18:6a4db94011d3 | 1139 | * tx_nrx: true if configuring TX, false if configuring RX. |
sahilmgandhi | 18:6a4db94011d3 | 1140 | ******************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1141 | static void serial_dmaSetupChannel(serial_t *obj, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1142 | { |
sahilmgandhi | 18:6a4db94011d3 | 1143 | DMA_CfgChannel_TypeDef channelConfig; |
sahilmgandhi | 18:6a4db94011d3 | 1144 | |
sahilmgandhi | 18:6a4db94011d3 | 1145 | if(tx_nrx) { |
sahilmgandhi | 18:6a4db94011d3 | 1146 | //setup TX channel |
sahilmgandhi | 18:6a4db94011d3 | 1147 | channelConfig.highPri = false; |
sahilmgandhi | 18:6a4db94011d3 | 1148 | channelConfig.enableInt = true; |
sahilmgandhi | 18:6a4db94011d3 | 1149 | channelConfig.cb = &(obj->serial.dmaOptionsTX.dmaCallback); |
sahilmgandhi | 18:6a4db94011d3 | 1150 | |
sahilmgandhi | 18:6a4db94011d3 | 1151 | switch((uint32_t)(obj->serial.periph.uart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1152 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 1153 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1154 | channelConfig.select = DMAREQ_UART0_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1155 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1156 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1157 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 1158 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1159 | channelConfig.select = DMAREQ_UART1_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1160 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1161 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1162 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 1163 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1164 | channelConfig.select = DMAREQ_USART0_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1165 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1166 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1167 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 1168 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1169 | channelConfig.select = DMAREQ_USART1_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1170 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1171 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1172 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 1173 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 1174 | channelConfig.select = DMAREQ_USART2_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1175 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1176 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1177 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 1178 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1179 | channelConfig.select = DMAREQ_LEUART0_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1180 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1181 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1182 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 1183 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1184 | channelConfig.select = DMAREQ_LEUART1_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1185 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1186 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1187 | } |
sahilmgandhi | 18:6a4db94011d3 | 1188 | |
sahilmgandhi | 18:6a4db94011d3 | 1189 | DMA_CfgChannel(obj->serial.dmaOptionsTX.dmaChannel, &channelConfig); |
sahilmgandhi | 18:6a4db94011d3 | 1190 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1191 | //setup RX channel |
sahilmgandhi | 18:6a4db94011d3 | 1192 | channelConfig.highPri = true; |
sahilmgandhi | 18:6a4db94011d3 | 1193 | channelConfig.enableInt = true; |
sahilmgandhi | 18:6a4db94011d3 | 1194 | channelConfig.cb = &(obj->serial.dmaOptionsRX.dmaCallback); |
sahilmgandhi | 18:6a4db94011d3 | 1195 | |
sahilmgandhi | 18:6a4db94011d3 | 1196 | switch((uint32_t)(obj->serial.periph.uart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1197 | #ifdef UART0 |
sahilmgandhi | 18:6a4db94011d3 | 1198 | case UART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1199 | channelConfig.select = DMAREQ_UART0_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1200 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1201 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1202 | #ifdef UART1 |
sahilmgandhi | 18:6a4db94011d3 | 1203 | case UART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1204 | channelConfig.select = DMAREQ_UART1_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1205 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1206 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1207 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 1208 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1209 | channelConfig.select = DMAREQ_USART0_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1210 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1211 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1212 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 1213 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1214 | channelConfig.select = DMAREQ_USART1_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1215 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1216 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1217 | #ifdef USART2 |
sahilmgandhi | 18:6a4db94011d3 | 1218 | case USART_2: |
sahilmgandhi | 18:6a4db94011d3 | 1219 | channelConfig.select = DMAREQ_USART2_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1220 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1221 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1222 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 1223 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1224 | channelConfig.select = DMAREQ_LEUART0_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1225 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1226 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1227 | #ifdef LEUART1 |
sahilmgandhi | 18:6a4db94011d3 | 1228 | case LEUART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1229 | channelConfig.select = DMAREQ_LEUART1_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1230 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1231 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1232 | } |
sahilmgandhi | 18:6a4db94011d3 | 1233 | |
sahilmgandhi | 18:6a4db94011d3 | 1234 | DMA_CfgChannel(obj->serial.dmaOptionsRX.dmaChannel, &channelConfig); |
sahilmgandhi | 18:6a4db94011d3 | 1235 | } |
sahilmgandhi | 18:6a4db94011d3 | 1236 | } |
sahilmgandhi | 18:6a4db94011d3 | 1237 | |
sahilmgandhi | 18:6a4db94011d3 | 1238 | #endif /* LDMA_PRESENT */ |
sahilmgandhi | 18:6a4db94011d3 | 1239 | |
sahilmgandhi | 18:6a4db94011d3 | 1240 | /****************************************** |
sahilmgandhi | 18:6a4db94011d3 | 1241 | * static void serial_dmaTrySetState(DMA_OPTIONS_t *obj, DMAUsage requestedState) |
sahilmgandhi | 18:6a4db94011d3 | 1242 | * |
sahilmgandhi | 18:6a4db94011d3 | 1243 | * Tries to set the passed DMA state to the requested state. |
sahilmgandhi | 18:6a4db94011d3 | 1244 | * |
sahilmgandhi | 18:6a4db94011d3 | 1245 | * requested state possibilities: |
sahilmgandhi | 18:6a4db94011d3 | 1246 | * * NEVER: |
sahilmgandhi | 18:6a4db94011d3 | 1247 | * if the previous state was always, will deallocate the channel |
sahilmgandhi | 18:6a4db94011d3 | 1248 | * * OPPORTUNISTIC: |
sahilmgandhi | 18:6a4db94011d3 | 1249 | * If the previous state was always, will reuse that channel but free upon next completion. |
sahilmgandhi | 18:6a4db94011d3 | 1250 | * If not, will try to acquire a channel. |
sahilmgandhi | 18:6a4db94011d3 | 1251 | * When allocated, state changes to DMA_USAGE_TEMPORARY_ALLOCATED. |
sahilmgandhi | 18:6a4db94011d3 | 1252 | * * ALWAYS: |
sahilmgandhi | 18:6a4db94011d3 | 1253 | * Will try to allocate a channel and keep it. |
sahilmgandhi | 18:6a4db94011d3 | 1254 | * If succesfully allocated, state changes to DMA_USAGE_ALLOCATED. |
sahilmgandhi | 18:6a4db94011d3 | 1255 | ******************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1256 | static void serial_dmaTrySetState(DMA_OPTIONS_t *obj, DMAUsage requestedState, serial_t *serialPtr, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1257 | { |
sahilmgandhi | 18:6a4db94011d3 | 1258 | DMAUsage currentState = obj->dmaUsageState; |
sahilmgandhi | 18:6a4db94011d3 | 1259 | int tempDMAChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 1260 | |
sahilmgandhi | 18:6a4db94011d3 | 1261 | if ((requestedState == DMA_USAGE_ALWAYS) && (currentState != DMA_USAGE_ALLOCATED)) { |
sahilmgandhi | 18:6a4db94011d3 | 1262 | /* Try to allocate channel */ |
sahilmgandhi | 18:6a4db94011d3 | 1263 | tempDMAChannel = dma_channel_allocate(DMA_CAP_NONE); |
sahilmgandhi | 18:6a4db94011d3 | 1264 | if(tempDMAChannel >= 0) { |
sahilmgandhi | 18:6a4db94011d3 | 1265 | obj->dmaChannel = tempDMAChannel; |
sahilmgandhi | 18:6a4db94011d3 | 1266 | obj->dmaUsageState = DMA_USAGE_ALLOCATED; |
sahilmgandhi | 18:6a4db94011d3 | 1267 | dma_init(); |
sahilmgandhi | 18:6a4db94011d3 | 1268 | serial_dmaSetupChannel(serialPtr, tx_nrx); |
sahilmgandhi | 18:6a4db94011d3 | 1269 | } |
sahilmgandhi | 18:6a4db94011d3 | 1270 | } else if (requestedState == DMA_USAGE_OPPORTUNISTIC) { |
sahilmgandhi | 18:6a4db94011d3 | 1271 | if (currentState == DMA_USAGE_ALLOCATED) { |
sahilmgandhi | 18:6a4db94011d3 | 1272 | /* Channels have already been allocated previously by an ALWAYS state, so after this transfer, we will release them */ |
sahilmgandhi | 18:6a4db94011d3 | 1273 | obj->dmaUsageState = DMA_USAGE_TEMPORARY_ALLOCATED; |
sahilmgandhi | 18:6a4db94011d3 | 1274 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1275 | /* Try to allocate channel */ |
sahilmgandhi | 18:6a4db94011d3 | 1276 | tempDMAChannel = dma_channel_allocate(DMA_CAP_NONE); |
sahilmgandhi | 18:6a4db94011d3 | 1277 | if(tempDMAChannel >= 0) { |
sahilmgandhi | 18:6a4db94011d3 | 1278 | obj->dmaChannel = tempDMAChannel; |
sahilmgandhi | 18:6a4db94011d3 | 1279 | obj->dmaUsageState = DMA_USAGE_TEMPORARY_ALLOCATED; |
sahilmgandhi | 18:6a4db94011d3 | 1280 | dma_init(); |
sahilmgandhi | 18:6a4db94011d3 | 1281 | serial_dmaSetupChannel(serialPtr, tx_nrx); |
sahilmgandhi | 18:6a4db94011d3 | 1282 | } |
sahilmgandhi | 18:6a4db94011d3 | 1283 | } |
sahilmgandhi | 18:6a4db94011d3 | 1284 | } else if (requestedState == DMA_USAGE_NEVER) { |
sahilmgandhi | 18:6a4db94011d3 | 1285 | /* If channel is allocated, get rid of it */ |
sahilmgandhi | 18:6a4db94011d3 | 1286 | dma_channel_free(obj->dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 1287 | obj->dmaChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 1288 | obj->dmaUsageState = DMA_USAGE_NEVER; |
sahilmgandhi | 18:6a4db94011d3 | 1289 | } |
sahilmgandhi | 18:6a4db94011d3 | 1290 | } |
sahilmgandhi | 18:6a4db94011d3 | 1291 | |
sahilmgandhi | 18:6a4db94011d3 | 1292 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 1293 | |
sahilmgandhi | 18:6a4db94011d3 | 1294 | static void serial_dmaActivate(serial_t *obj, void* cb, void* buffer, int length, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1295 | { |
sahilmgandhi | 18:6a4db94011d3 | 1296 | DMA_CfgDescr_TypeDef channelConfig; |
sahilmgandhi | 18:6a4db94011d3 | 1297 | |
sahilmgandhi | 18:6a4db94011d3 | 1298 | if(tx_nrx) { |
sahilmgandhi | 18:6a4db94011d3 | 1299 | // Set DMA callback |
sahilmgandhi | 18:6a4db94011d3 | 1300 | obj->serial.dmaOptionsTX.dmaCallback.cbFunc = serial_dmaTransferComplete; |
sahilmgandhi | 18:6a4db94011d3 | 1301 | obj->serial.dmaOptionsTX.dmaCallback.userPtr = NULL; |
sahilmgandhi | 18:6a4db94011d3 | 1302 | |
sahilmgandhi | 18:6a4db94011d3 | 1303 | // Set up configuration structure |
sahilmgandhi | 18:6a4db94011d3 | 1304 | channelConfig.dstInc = dmaDataIncNone; |
sahilmgandhi | 18:6a4db94011d3 | 1305 | channelConfig.srcInc = dmaDataInc1; |
sahilmgandhi | 18:6a4db94011d3 | 1306 | channelConfig.size = dmaDataSize1; |
sahilmgandhi | 18:6a4db94011d3 | 1307 | channelConfig.arbRate = dmaArbitrate1; |
sahilmgandhi | 18:6a4db94011d3 | 1308 | channelConfig.hprot = 0; |
sahilmgandhi | 18:6a4db94011d3 | 1309 | |
sahilmgandhi | 18:6a4db94011d3 | 1310 | // Clear TXC |
sahilmgandhi | 18:6a4db94011d3 | 1311 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1312 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1313 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1314 | USART_IntClear(obj->serial.periph.uart, USART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1315 | } |
sahilmgandhi | 18:6a4db94011d3 | 1316 | |
sahilmgandhi | 18:6a4db94011d3 | 1317 | // Set callback and enable TXC. This will fire once the |
sahilmgandhi | 18:6a4db94011d3 | 1318 | // serial transfer finishes |
sahilmgandhi | 18:6a4db94011d3 | 1319 | NVIC_SetVector(serial_get_tx_irq_index(obj), (uint32_t)cb); |
sahilmgandhi | 18:6a4db94011d3 | 1320 | serial_irq_set(obj, TxIrq, true); |
sahilmgandhi | 18:6a4db94011d3 | 1321 | |
sahilmgandhi | 18:6a4db94011d3 | 1322 | DMA_CfgDescr(obj->serial.dmaOptionsTX.dmaChannel, true, &channelConfig); |
sahilmgandhi | 18:6a4db94011d3 | 1323 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1324 | // Activate TX and clear TX buffer (note that clear must be done |
sahilmgandhi | 18:6a4db94011d3 | 1325 | // separately and before TXEN or DMA will die on some platforms) |
sahilmgandhi | 18:6a4db94011d3 | 1326 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1327 | obj->serial.periph.leuart->CMD = LEUART_CMD_TXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1328 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1329 | |
sahilmgandhi | 18:6a4db94011d3 | 1330 | // Kick off TX DMA |
sahilmgandhi | 18:6a4db94011d3 | 1331 | DMA_ActivateBasic(obj->serial.dmaOptionsTX.dmaChannel, true, false, (void*) &(obj->serial.periph.leuart->TXDATA), buffer, length - 1); |
sahilmgandhi | 18:6a4db94011d3 | 1332 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1333 | // Activate TX amd clear TX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1334 | obj->serial.periph.uart->CMD = USART_CMD_TXEN | USART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1335 | |
sahilmgandhi | 18:6a4db94011d3 | 1336 | // Kick off TX DMA |
sahilmgandhi | 18:6a4db94011d3 | 1337 | DMA_ActivateBasic(obj->serial.dmaOptionsTX.dmaChannel, true, false, (void*) &(obj->serial.periph.uart->TXDATA), buffer, length - 1); |
sahilmgandhi | 18:6a4db94011d3 | 1338 | } |
sahilmgandhi | 18:6a4db94011d3 | 1339 | |
sahilmgandhi | 18:6a4db94011d3 | 1340 | |
sahilmgandhi | 18:6a4db94011d3 | 1341 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1342 | // Set DMA callback |
sahilmgandhi | 18:6a4db94011d3 | 1343 | obj->serial.dmaOptionsRX.dmaCallback.cbFunc = serial_dmaTransferComplete; |
sahilmgandhi | 18:6a4db94011d3 | 1344 | obj->serial.dmaOptionsRX.dmaCallback.userPtr = cb; |
sahilmgandhi | 18:6a4db94011d3 | 1345 | |
sahilmgandhi | 18:6a4db94011d3 | 1346 | // Set up configuration structure |
sahilmgandhi | 18:6a4db94011d3 | 1347 | channelConfig.dstInc = dmaDataInc1; |
sahilmgandhi | 18:6a4db94011d3 | 1348 | channelConfig.srcInc = dmaDataIncNone; |
sahilmgandhi | 18:6a4db94011d3 | 1349 | channelConfig.size = dmaDataSize1; |
sahilmgandhi | 18:6a4db94011d3 | 1350 | channelConfig.arbRate = dmaArbitrate1; |
sahilmgandhi | 18:6a4db94011d3 | 1351 | channelConfig.hprot = 0; |
sahilmgandhi | 18:6a4db94011d3 | 1352 | |
sahilmgandhi | 18:6a4db94011d3 | 1353 | DMA_CfgDescr(obj->serial.dmaOptionsRX.dmaChannel, true, &channelConfig); |
sahilmgandhi | 18:6a4db94011d3 | 1354 | |
sahilmgandhi | 18:6a4db94011d3 | 1355 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1356 | // Activate RX and clear RX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1357 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1358 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1359 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1360 | |
sahilmgandhi | 18:6a4db94011d3 | 1361 | // Kick off RX DMA |
sahilmgandhi | 18:6a4db94011d3 | 1362 | DMA_ActivateBasic(obj->serial.dmaOptionsRX.dmaChannel, true, false, buffer, (void*) &(obj->serial.periph.leuart->RXDATA), length - 1); |
sahilmgandhi | 18:6a4db94011d3 | 1363 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1364 | // Activate RX and clear RX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1365 | obj->serial.periph.uart->CMD = USART_CMD_RXEN | USART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1366 | |
sahilmgandhi | 18:6a4db94011d3 | 1367 | // Kick off RX DMA |
sahilmgandhi | 18:6a4db94011d3 | 1368 | DMA_ActivateBasic(obj->serial.dmaOptionsRX.dmaChannel, true, false, buffer, (void*) &(obj->serial.periph.uart->RXDATA), length - 1); |
sahilmgandhi | 18:6a4db94011d3 | 1369 | } |
sahilmgandhi | 18:6a4db94011d3 | 1370 | } |
sahilmgandhi | 18:6a4db94011d3 | 1371 | } |
sahilmgandhi | 18:6a4db94011d3 | 1372 | |
sahilmgandhi | 18:6a4db94011d3 | 1373 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1374 | |
sahilmgandhi | 18:6a4db94011d3 | 1375 | |
sahilmgandhi | 18:6a4db94011d3 | 1376 | #ifdef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 1377 | |
sahilmgandhi | 18:6a4db94011d3 | 1378 | static void serial_dmaSetupChannel(serial_t *obj, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1379 | { |
sahilmgandhi | 18:6a4db94011d3 | 1380 | } |
sahilmgandhi | 18:6a4db94011d3 | 1381 | |
sahilmgandhi | 18:6a4db94011d3 | 1382 | static void serial_dmaActivate(serial_t *obj, void* cb, void* buffer, int length, bool tx_nrx) |
sahilmgandhi | 18:6a4db94011d3 | 1383 | { |
sahilmgandhi | 18:6a4db94011d3 | 1384 | LDMA_PeripheralSignal_t dma_periph; |
sahilmgandhi | 18:6a4db94011d3 | 1385 | |
sahilmgandhi | 18:6a4db94011d3 | 1386 | obj->serial.dmaOptionsRX.dmaCallback.userPtr = cb; |
sahilmgandhi | 18:6a4db94011d3 | 1387 | |
sahilmgandhi | 18:6a4db94011d3 | 1388 | if( tx_nrx ) { |
sahilmgandhi | 18:6a4db94011d3 | 1389 | volatile void *target_addr; |
sahilmgandhi | 18:6a4db94011d3 | 1390 | |
sahilmgandhi | 18:6a4db94011d3 | 1391 | // Clear TXC |
sahilmgandhi | 18:6a4db94011d3 | 1392 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1393 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1394 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1395 | USART_IntClear(obj->serial.periph.uart, USART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1396 | } |
sahilmgandhi | 18:6a4db94011d3 | 1397 | |
sahilmgandhi | 18:6a4db94011d3 | 1398 | switch((uint32_t)(obj->serial.periph.uart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1399 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 1400 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1401 | dma_periph = ldmaPeripheralSignal_USART0_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1402 | target_addr = &USART0->TXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1403 | obj->serial.periph.uart->CMD = USART_CMD_TXEN | USART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1404 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1405 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1406 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 1407 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1408 | dma_periph = ldmaPeripheralSignal_USART1_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1409 | target_addr = &USART1->TXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1410 | obj->serial.periph.uart->CMD = USART_CMD_TXEN | USART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1411 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1412 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1413 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 1414 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1415 | dma_periph = ldmaPeripheralSignal_LEUART0_TXBL; |
sahilmgandhi | 18:6a4db94011d3 | 1416 | target_addr = &LEUART0->TXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1417 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1418 | obj->serial.periph.leuart->CMD = LEUART_CMD_TXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1419 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1420 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1421 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1422 | default: |
sahilmgandhi | 18:6a4db94011d3 | 1423 | MBED_ASSERT(0); |
sahilmgandhi | 18:6a4db94011d3 | 1424 | while(1); |
sahilmgandhi | 18:6a4db94011d3 | 1425 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1426 | } |
sahilmgandhi | 18:6a4db94011d3 | 1427 | |
sahilmgandhi | 18:6a4db94011d3 | 1428 | // Set callback and enable TXC. This will fire once the |
sahilmgandhi | 18:6a4db94011d3 | 1429 | // serial transfer finishes |
sahilmgandhi | 18:6a4db94011d3 | 1430 | NVIC_SetVector(serial_get_tx_irq_index(obj), (uint32_t)cb); |
sahilmgandhi | 18:6a4db94011d3 | 1431 | serial_irq_set(obj, TxIrq, true); |
sahilmgandhi | 18:6a4db94011d3 | 1432 | |
sahilmgandhi | 18:6a4db94011d3 | 1433 | // Start DMA transfer |
sahilmgandhi | 18:6a4db94011d3 | 1434 | LDMA_TransferCfg_t xferConf = LDMA_TRANSFER_CFG_PERIPHERAL(dma_periph); |
sahilmgandhi | 18:6a4db94011d3 | 1435 | LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_M2P_BYTE(buffer, target_addr, length); |
sahilmgandhi | 18:6a4db94011d3 | 1436 | LDMAx_StartTransfer(obj->serial.dmaOptionsTX.dmaChannel, &xferConf, &desc, serial_dmaTransferComplete, NULL); |
sahilmgandhi | 18:6a4db94011d3 | 1437 | |
sahilmgandhi | 18:6a4db94011d3 | 1438 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1439 | volatile const void *source_addr; |
sahilmgandhi | 18:6a4db94011d3 | 1440 | |
sahilmgandhi | 18:6a4db94011d3 | 1441 | switch((uint32_t)(obj->serial.periph.uart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1442 | #ifdef USART0 |
sahilmgandhi | 18:6a4db94011d3 | 1443 | case USART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1444 | dma_periph = ldmaPeripheralSignal_USART0_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1445 | source_addr = &USART0->RXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1446 | obj->serial.periph.uart->CMD = USART_CMD_RXEN | USART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1447 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1448 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1449 | #ifdef USART1 |
sahilmgandhi | 18:6a4db94011d3 | 1450 | case USART_1: |
sahilmgandhi | 18:6a4db94011d3 | 1451 | dma_periph = ldmaPeripheralSignal_USART1_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1452 | source_addr = &USART1->RXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1453 | obj->serial.periph.uart->CMD = USART_CMD_RXEN | USART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1454 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1455 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1456 | #ifdef LEUART0 |
sahilmgandhi | 18:6a4db94011d3 | 1457 | case LEUART_0: |
sahilmgandhi | 18:6a4db94011d3 | 1458 | dma_periph = ldmaPeripheralSignal_LEUART0_RXDATAV; |
sahilmgandhi | 18:6a4db94011d3 | 1459 | source_addr = &LEUART0->RXDATA; |
sahilmgandhi | 18:6a4db94011d3 | 1460 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1461 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1462 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1463 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1464 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1465 | default: |
sahilmgandhi | 18:6a4db94011d3 | 1466 | MBED_ASSERT(0); |
sahilmgandhi | 18:6a4db94011d3 | 1467 | while(1); |
sahilmgandhi | 18:6a4db94011d3 | 1468 | break; |
sahilmgandhi | 18:6a4db94011d3 | 1469 | } |
sahilmgandhi | 18:6a4db94011d3 | 1470 | |
sahilmgandhi | 18:6a4db94011d3 | 1471 | LDMA_TransferCfg_t xferConf = LDMA_TRANSFER_CFG_PERIPHERAL(dma_periph); |
sahilmgandhi | 18:6a4db94011d3 | 1472 | LDMA_Descriptor_t desc = LDMA_DESCRIPTOR_SINGLE_P2M_BYTE(source_addr, buffer, length); |
sahilmgandhi | 18:6a4db94011d3 | 1473 | LDMAx_StartTransfer(obj->serial.dmaOptionsRX.dmaChannel, &xferConf, &desc, serial_dmaTransferComplete, cb); |
sahilmgandhi | 18:6a4db94011d3 | 1474 | } |
sahilmgandhi | 18:6a4db94011d3 | 1475 | } |
sahilmgandhi | 18:6a4db94011d3 | 1476 | |
sahilmgandhi | 18:6a4db94011d3 | 1477 | #endif /* LDMA_PRESENT */ |
sahilmgandhi | 18:6a4db94011d3 | 1478 | |
sahilmgandhi | 18:6a4db94011d3 | 1479 | /************************************************************************************ |
sahilmgandhi | 18:6a4db94011d3 | 1480 | * ASYNCHRONOUS HAL * |
sahilmgandhi | 18:6a4db94011d3 | 1481 | ************************************************************************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1482 | |
sahilmgandhi | 18:6a4db94011d3 | 1483 | #if DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 1484 | |
sahilmgandhi | 18:6a4db94011d3 | 1485 | /************************************ |
sahilmgandhi | 18:6a4db94011d3 | 1486 | * HELPER FUNCTIONS * |
sahilmgandhi | 18:6a4db94011d3 | 1487 | ***********************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1488 | |
sahilmgandhi | 18:6a4db94011d3 | 1489 | /** Configure TX events |
sahilmgandhi | 18:6a4db94011d3 | 1490 | * |
sahilmgandhi | 18:6a4db94011d3 | 1491 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1492 | * @param event The logical OR of the TX events to configure |
sahilmgandhi | 18:6a4db94011d3 | 1493 | * @param enable Set to non-zero to enable events, or zero to disable them |
sahilmgandhi | 18:6a4db94011d3 | 1494 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1495 | void serial_tx_enable_event(serial_t *obj, int event, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 1496 | { |
sahilmgandhi | 18:6a4db94011d3 | 1497 | // Shouldn't have to enable TX interrupt here, just need to keep track of the requested events. |
sahilmgandhi | 18:6a4db94011d3 | 1498 | if(enable) obj->serial.events |= event; |
sahilmgandhi | 18:6a4db94011d3 | 1499 | else obj->serial.events &= ~event; |
sahilmgandhi | 18:6a4db94011d3 | 1500 | } |
sahilmgandhi | 18:6a4db94011d3 | 1501 | |
sahilmgandhi | 18:6a4db94011d3 | 1502 | /** |
sahilmgandhi | 18:6a4db94011d3 | 1503 | * @param obj The serial object. |
sahilmgandhi | 18:6a4db94011d3 | 1504 | * @param event The logical OR of the RX events to configure |
sahilmgandhi | 18:6a4db94011d3 | 1505 | * @param enable Set to non-zero to enable events, or zero to disable them |
sahilmgandhi | 18:6a4db94011d3 | 1506 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1507 | void serial_rx_enable_event(serial_t *obj, int event, uint8_t enable) |
sahilmgandhi | 18:6a4db94011d3 | 1508 | { |
sahilmgandhi | 18:6a4db94011d3 | 1509 | if(enable) { |
sahilmgandhi | 18:6a4db94011d3 | 1510 | obj->serial.events |= event; |
sahilmgandhi | 18:6a4db94011d3 | 1511 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1512 | obj->serial.events &= ~event; |
sahilmgandhi | 18:6a4db94011d3 | 1513 | } |
sahilmgandhi | 18:6a4db94011d3 | 1514 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1515 | if(event & SERIAL_EVENT_RX_FRAMING_ERROR) { |
sahilmgandhi | 18:6a4db94011d3 | 1516 | //FERR interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1517 | if(enable) obj->serial.periph.leuart->IEN |= LEUART_IEN_FERR; |
sahilmgandhi | 18:6a4db94011d3 | 1518 | else obj->serial.periph.leuart->IEN &= ~LEUART_IEN_FERR; |
sahilmgandhi | 18:6a4db94011d3 | 1519 | } |
sahilmgandhi | 18:6a4db94011d3 | 1520 | if(event & SERIAL_EVENT_RX_PARITY_ERROR) { |
sahilmgandhi | 18:6a4db94011d3 | 1521 | //PERR interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1522 | if(enable) obj->serial.periph.leuart->IEN |= LEUART_IEN_PERR; |
sahilmgandhi | 18:6a4db94011d3 | 1523 | else obj->serial.periph.leuart->IEN &= ~LEUART_IEN_PERR; |
sahilmgandhi | 18:6a4db94011d3 | 1524 | } |
sahilmgandhi | 18:6a4db94011d3 | 1525 | if(event & SERIAL_EVENT_RX_OVERFLOW) { |
sahilmgandhi | 18:6a4db94011d3 | 1526 | //RXOF interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1527 | if(enable) obj->serial.periph.leuart->IEN |= LEUART_IEN_RXOF; |
sahilmgandhi | 18:6a4db94011d3 | 1528 | else obj->serial.periph.leuart->IEN &= ~LEUART_IEN_RXOF; |
sahilmgandhi | 18:6a4db94011d3 | 1529 | } |
sahilmgandhi | 18:6a4db94011d3 | 1530 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1531 | if(event & SERIAL_EVENT_RX_FRAMING_ERROR) { |
sahilmgandhi | 18:6a4db94011d3 | 1532 | //FERR interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1533 | if(enable) obj->serial.periph.uart->IEN |= USART_IEN_FERR; |
sahilmgandhi | 18:6a4db94011d3 | 1534 | else obj->serial.periph.uart->IEN &= ~USART_IEN_FERR; |
sahilmgandhi | 18:6a4db94011d3 | 1535 | } |
sahilmgandhi | 18:6a4db94011d3 | 1536 | if(event & SERIAL_EVENT_RX_PARITY_ERROR) { |
sahilmgandhi | 18:6a4db94011d3 | 1537 | //PERR interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1538 | if(enable) obj->serial.periph.uart->IEN |= USART_IEN_PERR; |
sahilmgandhi | 18:6a4db94011d3 | 1539 | else obj->serial.periph.uart->IEN &= ~USART_IEN_PERR; |
sahilmgandhi | 18:6a4db94011d3 | 1540 | } |
sahilmgandhi | 18:6a4db94011d3 | 1541 | if(event & SERIAL_EVENT_RX_OVERFLOW) { |
sahilmgandhi | 18:6a4db94011d3 | 1542 | //RXOF interrupt source |
sahilmgandhi | 18:6a4db94011d3 | 1543 | if(enable) obj->serial.periph.uart->IEN |= USART_IEN_RXOF; |
sahilmgandhi | 18:6a4db94011d3 | 1544 | else obj->serial.periph.uart->IEN &= ~USART_IEN_RXOF; |
sahilmgandhi | 18:6a4db94011d3 | 1545 | } |
sahilmgandhi | 18:6a4db94011d3 | 1546 | } |
sahilmgandhi | 18:6a4db94011d3 | 1547 | } |
sahilmgandhi | 18:6a4db94011d3 | 1548 | |
sahilmgandhi | 18:6a4db94011d3 | 1549 | /** Configure the TX buffer for an asynchronous write serial transaction |
sahilmgandhi | 18:6a4db94011d3 | 1550 | * |
sahilmgandhi | 18:6a4db94011d3 | 1551 | * @param obj The serial object. |
sahilmgandhi | 18:6a4db94011d3 | 1552 | * @param tx The buffer for sending. |
sahilmgandhi | 18:6a4db94011d3 | 1553 | * @param tx_length The number of words to transmit. |
sahilmgandhi | 18:6a4db94011d3 | 1554 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1555 | void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width) |
sahilmgandhi | 18:6a4db94011d3 | 1556 | { |
sahilmgandhi | 18:6a4db94011d3 | 1557 | // We only support byte buffers for now |
sahilmgandhi | 18:6a4db94011d3 | 1558 | MBED_ASSERT(width == 8); |
sahilmgandhi | 18:6a4db94011d3 | 1559 | |
sahilmgandhi | 18:6a4db94011d3 | 1560 | if(serial_tx_active(obj)) return; |
sahilmgandhi | 18:6a4db94011d3 | 1561 | |
sahilmgandhi | 18:6a4db94011d3 | 1562 | obj->tx_buff.buffer = tx; |
sahilmgandhi | 18:6a4db94011d3 | 1563 | obj->tx_buff.length = tx_length; |
sahilmgandhi | 18:6a4db94011d3 | 1564 | obj->tx_buff.pos = 0; |
sahilmgandhi | 18:6a4db94011d3 | 1565 | |
sahilmgandhi | 18:6a4db94011d3 | 1566 | return; |
sahilmgandhi | 18:6a4db94011d3 | 1567 | } |
sahilmgandhi | 18:6a4db94011d3 | 1568 | |
sahilmgandhi | 18:6a4db94011d3 | 1569 | /** Configure the TX buffer for an asynchronous read serial transaction |
sahilmgandhi | 18:6a4db94011d3 | 1570 | * |
sahilmgandhi | 18:6a4db94011d3 | 1571 | * @param obj The serial object. |
sahilmgandhi | 18:6a4db94011d3 | 1572 | * @param rx The buffer for receiving. |
sahilmgandhi | 18:6a4db94011d3 | 1573 | * @param rx_length The number of words to read. |
sahilmgandhi | 18:6a4db94011d3 | 1574 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1575 | void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width) |
sahilmgandhi | 18:6a4db94011d3 | 1576 | { |
sahilmgandhi | 18:6a4db94011d3 | 1577 | // We only support byte buffers for now |
sahilmgandhi | 18:6a4db94011d3 | 1578 | MBED_ASSERT(width == 8); |
sahilmgandhi | 18:6a4db94011d3 | 1579 | |
sahilmgandhi | 18:6a4db94011d3 | 1580 | if(serial_rx_active(obj)) return; |
sahilmgandhi | 18:6a4db94011d3 | 1581 | |
sahilmgandhi | 18:6a4db94011d3 | 1582 | obj->rx_buff.buffer = rx; |
sahilmgandhi | 18:6a4db94011d3 | 1583 | obj->rx_buff.length = rx_length; |
sahilmgandhi | 18:6a4db94011d3 | 1584 | obj->rx_buff.pos = 0; |
sahilmgandhi | 18:6a4db94011d3 | 1585 | |
sahilmgandhi | 18:6a4db94011d3 | 1586 | return; |
sahilmgandhi | 18:6a4db94011d3 | 1587 | } |
sahilmgandhi | 18:6a4db94011d3 | 1588 | |
sahilmgandhi | 18:6a4db94011d3 | 1589 | /************************************ |
sahilmgandhi | 18:6a4db94011d3 | 1590 | * TRANSFER FUNCTIONS * |
sahilmgandhi | 18:6a4db94011d3 | 1591 | ***********************************/ |
sahilmgandhi | 18:6a4db94011d3 | 1592 | |
sahilmgandhi | 18:6a4db94011d3 | 1593 | /** Begin asynchronous TX transfer. The used buffer is specified in the serial object, |
sahilmgandhi | 18:6a4db94011d3 | 1594 | * tx_buff |
sahilmgandhi | 18:6a4db94011d3 | 1595 | * |
sahilmgandhi | 18:6a4db94011d3 | 1596 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1597 | * @param cb The function to call when an event occurs |
sahilmgandhi | 18:6a4db94011d3 | 1598 | * @param hint A suggestion for how to use DMA with this transfer |
sahilmgandhi | 18:6a4db94011d3 | 1599 | * @return Returns number of data transfered, or 0 otherwise |
sahilmgandhi | 18:6a4db94011d3 | 1600 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1601 | int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint) |
sahilmgandhi | 18:6a4db94011d3 | 1602 | { |
sahilmgandhi | 18:6a4db94011d3 | 1603 | // Check that a buffer has indeed been set up |
sahilmgandhi | 18:6a4db94011d3 | 1604 | MBED_ASSERT(tx != (void*)0); |
sahilmgandhi | 18:6a4db94011d3 | 1605 | if(tx_length == 0) return 0; |
sahilmgandhi | 18:6a4db94011d3 | 1606 | |
sahilmgandhi | 18:6a4db94011d3 | 1607 | // Set up buffer |
sahilmgandhi | 18:6a4db94011d3 | 1608 | serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width); |
sahilmgandhi | 18:6a4db94011d3 | 1609 | |
sahilmgandhi | 18:6a4db94011d3 | 1610 | // Set up events |
sahilmgandhi | 18:6a4db94011d3 | 1611 | serial_tx_enable_event(obj, SERIAL_EVENT_TX_ALL, false); |
sahilmgandhi | 18:6a4db94011d3 | 1612 | serial_tx_enable_event(obj, event, true); |
sahilmgandhi | 18:6a4db94011d3 | 1613 | |
sahilmgandhi | 18:6a4db94011d3 | 1614 | // Set up sleepmode |
sahilmgandhi | 18:6a4db94011d3 | 1615 | serial_block_sleep(obj); |
sahilmgandhi | 18:6a4db94011d3 | 1616 | |
sahilmgandhi | 18:6a4db94011d3 | 1617 | // Determine DMA strategy |
sahilmgandhi | 18:6a4db94011d3 | 1618 | serial_dmaTrySetState(&(obj->serial.dmaOptionsTX), hint, obj, true); |
sahilmgandhi | 18:6a4db94011d3 | 1619 | |
sahilmgandhi | 18:6a4db94011d3 | 1620 | // If DMA, kick off DMA transfer |
sahilmgandhi | 18:6a4db94011d3 | 1621 | if(obj->serial.dmaOptionsTX.dmaChannel >= 0) { |
sahilmgandhi | 18:6a4db94011d3 | 1622 | serial_dmaActivate(obj, (void*)handler, obj->tx_buff.buffer, obj->tx_buff.length, true); |
sahilmgandhi | 18:6a4db94011d3 | 1623 | } |
sahilmgandhi | 18:6a4db94011d3 | 1624 | // Else, activate interrupt. TXBL will take care of buffer filling through ISR. |
sahilmgandhi | 18:6a4db94011d3 | 1625 | else { |
sahilmgandhi | 18:6a4db94011d3 | 1626 | // Store callback |
sahilmgandhi | 18:6a4db94011d3 | 1627 | NVIC_ClearPendingIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1628 | NVIC_DisableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1629 | NVIC_SetPriority(serial_get_tx_irq_index(obj), 1); |
sahilmgandhi | 18:6a4db94011d3 | 1630 | NVIC_SetVector(serial_get_tx_irq_index(obj), (uint32_t)handler); |
sahilmgandhi | 18:6a4db94011d3 | 1631 | NVIC_EnableIRQ(serial_get_tx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1632 | |
sahilmgandhi | 18:6a4db94011d3 | 1633 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1634 | // Activate TX and clear TX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1635 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1636 | obj->serial.periph.leuart->CMD = LEUART_CMD_TXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1637 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1638 | |
sahilmgandhi | 18:6a4db94011d3 | 1639 | // Enable interrupt |
sahilmgandhi | 18:6a4db94011d3 | 1640 | LEUART_IntEnable(obj->serial.periph.leuart, LEUART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 1641 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1642 | // Activate TX and clear TX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1643 | obj->serial.periph.uart->CMD = USART_CMD_TXEN | USART_CMD_CLEARTX; |
sahilmgandhi | 18:6a4db94011d3 | 1644 | |
sahilmgandhi | 18:6a4db94011d3 | 1645 | // Enable interrupt |
sahilmgandhi | 18:6a4db94011d3 | 1646 | USART_IntEnable(obj->serial.periph.uart, USART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 1647 | } |
sahilmgandhi | 18:6a4db94011d3 | 1648 | } |
sahilmgandhi | 18:6a4db94011d3 | 1649 | |
sahilmgandhi | 18:6a4db94011d3 | 1650 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 1651 | } |
sahilmgandhi | 18:6a4db94011d3 | 1652 | |
sahilmgandhi | 18:6a4db94011d3 | 1653 | /** Begin asynchronous RX transfer (enable interrupt for data collecting) |
sahilmgandhi | 18:6a4db94011d3 | 1654 | * The used buffer is specified in the serial object - rx_buff |
sahilmgandhi | 18:6a4db94011d3 | 1655 | * |
sahilmgandhi | 18:6a4db94011d3 | 1656 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1657 | * @param cb The function to call when an event occurs |
sahilmgandhi | 18:6a4db94011d3 | 1658 | * @param hint A suggestion for how to use DMA with this transfer |
sahilmgandhi | 18:6a4db94011d3 | 1659 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1660 | void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint) |
sahilmgandhi | 18:6a4db94011d3 | 1661 | { |
sahilmgandhi | 18:6a4db94011d3 | 1662 | // Check that a buffer has indeed been set up |
sahilmgandhi | 18:6a4db94011d3 | 1663 | MBED_ASSERT(rx != (void*)0); |
sahilmgandhi | 18:6a4db94011d3 | 1664 | if(rx_length == 0) return; |
sahilmgandhi | 18:6a4db94011d3 | 1665 | |
sahilmgandhi | 18:6a4db94011d3 | 1666 | // Set up buffer |
sahilmgandhi | 18:6a4db94011d3 | 1667 | serial_rx_buffer_set(obj,(void*) rx, rx_length, rx_width); |
sahilmgandhi | 18:6a4db94011d3 | 1668 | |
sahilmgandhi | 18:6a4db94011d3 | 1669 | //disable character match if no character is specified |
sahilmgandhi | 18:6a4db94011d3 | 1670 | if(char_match == SERIAL_RESERVED_CHAR_MATCH){ |
sahilmgandhi | 18:6a4db94011d3 | 1671 | event &= ~SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 1672 | } |
sahilmgandhi | 18:6a4db94011d3 | 1673 | |
sahilmgandhi | 18:6a4db94011d3 | 1674 | /*clear all set interrupts*/ |
sahilmgandhi | 18:6a4db94011d3 | 1675 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1676 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_PERR | LEUART_IFC_FERR | LEUART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 1677 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 1678 | USART_IntClear(obj->serial.periph.uart, USART_IFC_PERR | USART_IFC_FERR | USART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 1679 | } |
sahilmgandhi | 18:6a4db94011d3 | 1680 | |
sahilmgandhi | 18:6a4db94011d3 | 1681 | // Set up events |
sahilmgandhi | 18:6a4db94011d3 | 1682 | serial_rx_enable_event(obj, SERIAL_EVENT_RX_ALL, false); |
sahilmgandhi | 18:6a4db94011d3 | 1683 | serial_rx_enable_event(obj, event, true); |
sahilmgandhi | 18:6a4db94011d3 | 1684 | obj->char_match = char_match; |
sahilmgandhi | 18:6a4db94011d3 | 1685 | |
sahilmgandhi | 18:6a4db94011d3 | 1686 | // Set up sleepmode |
sahilmgandhi | 18:6a4db94011d3 | 1687 | serial_block_sleep(obj); |
sahilmgandhi | 18:6a4db94011d3 | 1688 | |
sahilmgandhi | 18:6a4db94011d3 | 1689 | // Determine DMA strategy |
sahilmgandhi | 18:6a4db94011d3 | 1690 | // If character match is enabled, we can't use DMA, sadly. We could when using LEUART though, but that support is not in here yet. |
sahilmgandhi | 18:6a4db94011d3 | 1691 | // TODO: add DMA support for character matching with leuart |
sahilmgandhi | 18:6a4db94011d3 | 1692 | if(!(event & SERIAL_EVENT_RX_CHARACTER_MATCH)) { |
sahilmgandhi | 18:6a4db94011d3 | 1693 | serial_dmaTrySetState(&(obj->serial.dmaOptionsRX), hint, obj, false); |
sahilmgandhi | 18:6a4db94011d3 | 1694 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 1695 | serial_dmaTrySetState(&(obj->serial.dmaOptionsRX), DMA_USAGE_NEVER, obj, false); |
sahilmgandhi | 18:6a4db94011d3 | 1696 | } |
sahilmgandhi | 18:6a4db94011d3 | 1697 | |
sahilmgandhi | 18:6a4db94011d3 | 1698 | // If DMA, kick off DMA |
sahilmgandhi | 18:6a4db94011d3 | 1699 | if(obj->serial.dmaOptionsRX.dmaChannel >= 0) { |
sahilmgandhi | 18:6a4db94011d3 | 1700 | serial_dmaActivate(obj, (void*)handler, obj->rx_buff.buffer, obj->rx_buff.length, false); |
sahilmgandhi | 18:6a4db94011d3 | 1701 | } |
sahilmgandhi | 18:6a4db94011d3 | 1702 | // Else, activate interrupt. RXDATAV is responsible for incoming data notification. |
sahilmgandhi | 18:6a4db94011d3 | 1703 | else { |
sahilmgandhi | 18:6a4db94011d3 | 1704 | // Store callback |
sahilmgandhi | 18:6a4db94011d3 | 1705 | NVIC_ClearPendingIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1706 | NVIC_SetVector(serial_get_rx_irq_index(obj), (uint32_t)handler); |
sahilmgandhi | 18:6a4db94011d3 | 1707 | NVIC_EnableIRQ(serial_get_rx_irq_index(obj)); |
sahilmgandhi | 18:6a4db94011d3 | 1708 | |
sahilmgandhi | 18:6a4db94011d3 | 1709 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1710 | // Activate RX and clear RX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1711 | obj->serial.periph.leuart->CMD = LEUART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1712 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXEN; |
sahilmgandhi | 18:6a4db94011d3 | 1713 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 1714 | |
sahilmgandhi | 18:6a4db94011d3 | 1715 | // Enable interrupt |
sahilmgandhi | 18:6a4db94011d3 | 1716 | LEUART_IntEnable(obj->serial.periph.leuart, LEUART_IEN_RXDATAV); |
sahilmgandhi | 18:6a4db94011d3 | 1717 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1718 | // Activate RX and clear RX buffer |
sahilmgandhi | 18:6a4db94011d3 | 1719 | obj->serial.periph.uart->CMD = USART_CMD_RXEN | USART_CMD_CLEARRX; |
sahilmgandhi | 18:6a4db94011d3 | 1720 | |
sahilmgandhi | 18:6a4db94011d3 | 1721 | // Clear RXFULL |
sahilmgandhi | 18:6a4db94011d3 | 1722 | USART_IntClear(obj->serial.periph.uart, USART_IFC_RXFULL); |
sahilmgandhi | 18:6a4db94011d3 | 1723 | |
sahilmgandhi | 18:6a4db94011d3 | 1724 | // Enable interrupt |
sahilmgandhi | 18:6a4db94011d3 | 1725 | USART_IntEnable(obj->serial.periph.uart, USART_IEN_RXDATAV); |
sahilmgandhi | 18:6a4db94011d3 | 1726 | } |
sahilmgandhi | 18:6a4db94011d3 | 1727 | } |
sahilmgandhi | 18:6a4db94011d3 | 1728 | |
sahilmgandhi | 18:6a4db94011d3 | 1729 | return; |
sahilmgandhi | 18:6a4db94011d3 | 1730 | } |
sahilmgandhi | 18:6a4db94011d3 | 1731 | |
sahilmgandhi | 18:6a4db94011d3 | 1732 | /** Attempts to determine if the serial peripheral is already in use for TX |
sahilmgandhi | 18:6a4db94011d3 | 1733 | * |
sahilmgandhi | 18:6a4db94011d3 | 1734 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1735 | * @return Non-zero if the TX transaction is ongoing, 0 otherwise |
sahilmgandhi | 18:6a4db94011d3 | 1736 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1737 | uint8_t serial_tx_active(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1738 | { |
sahilmgandhi | 18:6a4db94011d3 | 1739 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1740 | return (obj->serial.periph.leuart->IEN & (LEUART_IEN_TXBL|LEUART_IEN_TXC)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 1741 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1742 | return (obj->serial.periph.uart->IEN & (USART_IEN_TXBL|USART_IEN_TXC)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 1743 | } |
sahilmgandhi | 18:6a4db94011d3 | 1744 | } |
sahilmgandhi | 18:6a4db94011d3 | 1745 | |
sahilmgandhi | 18:6a4db94011d3 | 1746 | /** Attempts to determine if the serial peripheral is already in use for RX |
sahilmgandhi | 18:6a4db94011d3 | 1747 | * |
sahilmgandhi | 18:6a4db94011d3 | 1748 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1749 | * @return Non-zero if the RX transaction is ongoing, 0 otherwise |
sahilmgandhi | 18:6a4db94011d3 | 1750 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1751 | uint8_t serial_rx_active(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1752 | { |
sahilmgandhi | 18:6a4db94011d3 | 1753 | switch(obj->serial.dmaOptionsRX.dmaUsageState) { |
sahilmgandhi | 18:6a4db94011d3 | 1754 | case DMA_USAGE_TEMPORARY_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 1755 | /* Temporary allocation always means its active, as this state gets cleared afterwards */ |
sahilmgandhi | 18:6a4db94011d3 | 1756 | return 1; |
sahilmgandhi | 18:6a4db94011d3 | 1757 | case DMA_USAGE_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 1758 | /* Check whether the allocated DMA channel is active by checking the DMA transfer */ |
sahilmgandhi | 18:6a4db94011d3 | 1759 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 1760 | return DMA_ChannelEnabled(obj->serial.dmaOptionsRX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 1761 | #else |
sahilmgandhi | 18:6a4db94011d3 | 1762 | // LDMA_TransferDone does not work since the CHDONE bits get cleared, |
sahilmgandhi | 18:6a4db94011d3 | 1763 | // so just check if the channel is enabled |
sahilmgandhi | 18:6a4db94011d3 | 1764 | return LDMA->CHEN & (1 << obj->serial.dmaOptionsRX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 1765 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 1766 | default: |
sahilmgandhi | 18:6a4db94011d3 | 1767 | /* Check whether interrupt for serial TX is enabled */ |
sahilmgandhi | 18:6a4db94011d3 | 1768 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1769 | return (obj->serial.periph.leuart->IEN & (LEUART_IEN_RXDATAV)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 1770 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1771 | return (obj->serial.periph.uart->IEN & (USART_IEN_RXDATAV)) ? true : false; |
sahilmgandhi | 18:6a4db94011d3 | 1772 | } |
sahilmgandhi | 18:6a4db94011d3 | 1773 | } |
sahilmgandhi | 18:6a4db94011d3 | 1774 | } |
sahilmgandhi | 18:6a4db94011d3 | 1775 | |
sahilmgandhi | 18:6a4db94011d3 | 1776 | /** The asynchronous TX handler. Writes to the TX FIFO and checks for events. |
sahilmgandhi | 18:6a4db94011d3 | 1777 | * If any TX event has occured, the TX abort function is called. |
sahilmgandhi | 18:6a4db94011d3 | 1778 | * |
sahilmgandhi | 18:6a4db94011d3 | 1779 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1780 | * @return Returns event flags if a TX transfer termination condition was met or 0 otherwise |
sahilmgandhi | 18:6a4db94011d3 | 1781 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1782 | int serial_tx_irq_handler_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1783 | { |
sahilmgandhi | 18:6a4db94011d3 | 1784 | /* This interrupt handler is called from USART irq */ |
sahilmgandhi | 18:6a4db94011d3 | 1785 | uint8_t *buf = obj->tx_buff.buffer; |
sahilmgandhi | 18:6a4db94011d3 | 1786 | |
sahilmgandhi | 18:6a4db94011d3 | 1787 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1788 | if(obj->serial.periph.leuart->IEN & LEUART_IEN_TXBL){ |
sahilmgandhi | 18:6a4db94011d3 | 1789 | /* There is still data to send */ |
sahilmgandhi | 18:6a4db94011d3 | 1790 | while((LEUART_StatusGet(obj->serial.periph.leuart) & LEUART_STATUS_TXBL) && (obj->tx_buff.pos <= (obj->tx_buff.length - 1))) { |
sahilmgandhi | 18:6a4db94011d3 | 1791 | while (obj->serial.periph.leuart->SYNCBUSY); |
sahilmgandhi | 18:6a4db94011d3 | 1792 | LEUART_Tx(obj->serial.periph.leuart, buf[obj->tx_buff.pos]); |
sahilmgandhi | 18:6a4db94011d3 | 1793 | obj->tx_buff.pos++; |
sahilmgandhi | 18:6a4db94011d3 | 1794 | } |
sahilmgandhi | 18:6a4db94011d3 | 1795 | if(obj->tx_buff.pos >= obj->tx_buff.length){ |
sahilmgandhi | 18:6a4db94011d3 | 1796 | /* Last byte has been put in TX, set up TXC interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1797 | LEUART_IntDisable(obj->serial.periph.leuart, LEUART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 1798 | LEUART_IntEnable(obj->serial.periph.leuart, LEUART_IEN_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1799 | while (obj->serial.periph.leuart->SYNCBUSY); |
sahilmgandhi | 18:6a4db94011d3 | 1800 | } |
sahilmgandhi | 18:6a4db94011d3 | 1801 | }else if (obj->serial.periph.leuart->IF & LEUART_IF_TXC){ |
sahilmgandhi | 18:6a4db94011d3 | 1802 | /* Last byte has been successfully transmitted. Stop the procedure */ |
sahilmgandhi | 18:6a4db94011d3 | 1803 | serial_tx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1804 | return SERIAL_EVENT_TX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1805 | } |
sahilmgandhi | 18:6a4db94011d3 | 1806 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1807 | if(obj->serial.periph.uart->IEN & USART_IEN_TXBL){ |
sahilmgandhi | 18:6a4db94011d3 | 1808 | /* There is still data to send */ |
sahilmgandhi | 18:6a4db94011d3 | 1809 | while((USART_StatusGet(obj->serial.periph.uart) & USART_STATUS_TXBL) && (obj->tx_buff.pos <= (obj->tx_buff.length - 1))) { |
sahilmgandhi | 18:6a4db94011d3 | 1810 | USART_Tx(obj->serial.periph.uart, buf[obj->tx_buff.pos]); |
sahilmgandhi | 18:6a4db94011d3 | 1811 | obj->tx_buff.pos++; |
sahilmgandhi | 18:6a4db94011d3 | 1812 | } |
sahilmgandhi | 18:6a4db94011d3 | 1813 | if(obj->tx_buff.pos >= obj->tx_buff.length){ |
sahilmgandhi | 18:6a4db94011d3 | 1814 | /* Last byte has been put in TX, set up TXC interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1815 | USART_IntDisable(obj->serial.periph.uart, USART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 1816 | USART_IntEnable(obj->serial.periph.uart, USART_IEN_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 1817 | } |
sahilmgandhi | 18:6a4db94011d3 | 1818 | } else if (obj->serial.periph.uart->IF & USART_IF_TXC) { |
sahilmgandhi | 18:6a4db94011d3 | 1819 | /* Last byte has been successfully transmitted. Stop the procedure */ |
sahilmgandhi | 18:6a4db94011d3 | 1820 | serial_tx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1821 | return SERIAL_EVENT_TX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1822 | } |
sahilmgandhi | 18:6a4db94011d3 | 1823 | } |
sahilmgandhi | 18:6a4db94011d3 | 1824 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 1825 | } |
sahilmgandhi | 18:6a4db94011d3 | 1826 | |
sahilmgandhi | 18:6a4db94011d3 | 1827 | /** The asynchronous RX handler. Reads from the RX FIFOF and checks for events. |
sahilmgandhi | 18:6a4db94011d3 | 1828 | * If any RX event has occured, the RX abort function is called. |
sahilmgandhi | 18:6a4db94011d3 | 1829 | * |
sahilmgandhi | 18:6a4db94011d3 | 1830 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 1831 | * @return Returns event flags if a RX transfer termination condition was met or 0 otherwise |
sahilmgandhi | 18:6a4db94011d3 | 1832 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1833 | int serial_rx_irq_handler_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1834 | { |
sahilmgandhi | 18:6a4db94011d3 | 1835 | int event = 0; |
sahilmgandhi | 18:6a4db94011d3 | 1836 | |
sahilmgandhi | 18:6a4db94011d3 | 1837 | /* This interrupt handler is called from USART irq */ |
sahilmgandhi | 18:6a4db94011d3 | 1838 | uint8_t *buf = (uint8_t*)obj->rx_buff.buffer; |
sahilmgandhi | 18:6a4db94011d3 | 1839 | |
sahilmgandhi | 18:6a4db94011d3 | 1840 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1841 | /* Determine the source of the interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1842 | if(LEUART_IntGetEnabled(obj->serial.periph.leuart) & LEUART_IF_PERR) { |
sahilmgandhi | 18:6a4db94011d3 | 1843 | /* Parity error has occurred, and we are notifying. */ |
sahilmgandhi | 18:6a4db94011d3 | 1844 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_PERR); |
sahilmgandhi | 18:6a4db94011d3 | 1845 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1846 | return SERIAL_EVENT_RX_PARITY_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 1847 | } |
sahilmgandhi | 18:6a4db94011d3 | 1848 | |
sahilmgandhi | 18:6a4db94011d3 | 1849 | if(LEUART_IntGetEnabled(obj->serial.periph.leuart) & LEUART_IF_FERR) { |
sahilmgandhi | 18:6a4db94011d3 | 1850 | /* Framing error has occurred, and we are notifying */ |
sahilmgandhi | 18:6a4db94011d3 | 1851 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_FERR); |
sahilmgandhi | 18:6a4db94011d3 | 1852 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1853 | return SERIAL_EVENT_RX_FRAMING_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 1854 | } |
sahilmgandhi | 18:6a4db94011d3 | 1855 | |
sahilmgandhi | 18:6a4db94011d3 | 1856 | if(LEUART_IntGetEnabled(obj->serial.periph.leuart) & LEUART_IF_RXOF) { |
sahilmgandhi | 18:6a4db94011d3 | 1857 | /* RX buffer overflow has occurred, and we are notifying */ |
sahilmgandhi | 18:6a4db94011d3 | 1858 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 1859 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1860 | return SERIAL_EVENT_RX_OVERFLOW; |
sahilmgandhi | 18:6a4db94011d3 | 1861 | } |
sahilmgandhi | 18:6a4db94011d3 | 1862 | |
sahilmgandhi | 18:6a4db94011d3 | 1863 | if((LEUART_IntGetEnabled(obj->serial.periph.leuart) & LEUART_IF_RXDATAV) || (LEUART_StatusGet(obj->serial.periph.leuart) & LEUART_STATUS_RXDATAV)) { |
sahilmgandhi | 18:6a4db94011d3 | 1864 | /* Valid data in buffer. Determine course of action: continue receiving or interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1865 | if(obj->rx_buff.pos >= (obj->rx_buff.length - 1)) { |
sahilmgandhi | 18:6a4db94011d3 | 1866 | /* Last char, transfer complete. Switch off interrupt and return event. */ |
sahilmgandhi | 18:6a4db94011d3 | 1867 | buf[obj->rx_buff.pos] = LEUART_RxDataGet(obj->serial.periph.leuart); |
sahilmgandhi | 18:6a4db94011d3 | 1868 | |
sahilmgandhi | 18:6a4db94011d3 | 1869 | event |= SERIAL_EVENT_RX_COMPLETE; |
sahilmgandhi | 18:6a4db94011d3 | 1870 | |
sahilmgandhi | 18:6a4db94011d3 | 1871 | if((buf[obj->rx_buff.pos] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 1872 | |
sahilmgandhi | 18:6a4db94011d3 | 1873 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1874 | return event & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1875 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1876 | /* There's still space in the receive buffer */ |
sahilmgandhi | 18:6a4db94011d3 | 1877 | while((LEUART_StatusGet(obj->serial.periph.leuart) & LEUART_STATUS_RXDATAV) && (obj->rx_buff.pos <= (obj->rx_buff.length - 1))) { |
sahilmgandhi | 18:6a4db94011d3 | 1878 | bool aborting = false; |
sahilmgandhi | 18:6a4db94011d3 | 1879 | buf[obj->rx_buff.pos] = LEUART_RxDataGet(obj->serial.periph.leuart); |
sahilmgandhi | 18:6a4db94011d3 | 1880 | obj->rx_buff.pos++; |
sahilmgandhi | 18:6a4db94011d3 | 1881 | |
sahilmgandhi | 18:6a4db94011d3 | 1882 | /* Check for character match event */ |
sahilmgandhi | 18:6a4db94011d3 | 1883 | if((buf[obj->rx_buff.pos - 1] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) { |
sahilmgandhi | 18:6a4db94011d3 | 1884 | aborting = true; |
sahilmgandhi | 18:6a4db94011d3 | 1885 | event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 1886 | } |
sahilmgandhi | 18:6a4db94011d3 | 1887 | |
sahilmgandhi | 18:6a4db94011d3 | 1888 | /* Check for final char event */ |
sahilmgandhi | 18:6a4db94011d3 | 1889 | if(obj->rx_buff.pos >= (obj->rx_buff.length)) { |
sahilmgandhi | 18:6a4db94011d3 | 1890 | aborting = true; |
sahilmgandhi | 18:6a4db94011d3 | 1891 | event |= SERIAL_EVENT_RX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1892 | } |
sahilmgandhi | 18:6a4db94011d3 | 1893 | |
sahilmgandhi | 18:6a4db94011d3 | 1894 | if(aborting) { |
sahilmgandhi | 18:6a4db94011d3 | 1895 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1896 | return event & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1897 | } |
sahilmgandhi | 18:6a4db94011d3 | 1898 | } |
sahilmgandhi | 18:6a4db94011d3 | 1899 | } |
sahilmgandhi | 18:6a4db94011d3 | 1900 | } |
sahilmgandhi | 18:6a4db94011d3 | 1901 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1902 | /* Determine the source of the interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1903 | if(USART_IntGetEnabled(obj->serial.periph.uart) & USART_IF_PERR) { |
sahilmgandhi | 18:6a4db94011d3 | 1904 | /* Parity error has occurred, and we are notifying. */ |
sahilmgandhi | 18:6a4db94011d3 | 1905 | USART_IntClear(obj->serial.periph.uart, USART_IFC_PERR); |
sahilmgandhi | 18:6a4db94011d3 | 1906 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1907 | return SERIAL_EVENT_RX_PARITY_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 1908 | } |
sahilmgandhi | 18:6a4db94011d3 | 1909 | |
sahilmgandhi | 18:6a4db94011d3 | 1910 | if(USART_IntGetEnabled(obj->serial.periph.uart) & USART_IF_FERR) { |
sahilmgandhi | 18:6a4db94011d3 | 1911 | /* Framing error has occurred, and we are notifying */ |
sahilmgandhi | 18:6a4db94011d3 | 1912 | USART_IntClear(obj->serial.periph.uart, USART_IFC_FERR); |
sahilmgandhi | 18:6a4db94011d3 | 1913 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1914 | return SERIAL_EVENT_RX_FRAMING_ERROR; |
sahilmgandhi | 18:6a4db94011d3 | 1915 | } |
sahilmgandhi | 18:6a4db94011d3 | 1916 | |
sahilmgandhi | 18:6a4db94011d3 | 1917 | if(USART_IntGetEnabled(obj->serial.periph.uart) & USART_IF_RXOF) { |
sahilmgandhi | 18:6a4db94011d3 | 1918 | /* RX buffer overflow has occurred, and we are notifying */ |
sahilmgandhi | 18:6a4db94011d3 | 1919 | USART_IntClear(obj->serial.periph.uart, USART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 1920 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1921 | return SERIAL_EVENT_RX_OVERFLOW; |
sahilmgandhi | 18:6a4db94011d3 | 1922 | } |
sahilmgandhi | 18:6a4db94011d3 | 1923 | |
sahilmgandhi | 18:6a4db94011d3 | 1924 | if((USART_IntGetEnabled(obj->serial.periph.uart) & USART_IF_RXDATAV) || (USART_StatusGet(obj->serial.periph.uart) & USART_STATUS_RXFULL)) { |
sahilmgandhi | 18:6a4db94011d3 | 1925 | /* Valid data in buffer. Determine course of action: continue receiving or interrupt */ |
sahilmgandhi | 18:6a4db94011d3 | 1926 | if(obj->rx_buff.pos >= (obj->rx_buff.length - 1)) { |
sahilmgandhi | 18:6a4db94011d3 | 1927 | /* Last char, transfer complete. Switch off interrupt and return event. */ |
sahilmgandhi | 18:6a4db94011d3 | 1928 | buf[obj->rx_buff.pos] = USART_RxDataGet(obj->serial.periph.uart); |
sahilmgandhi | 18:6a4db94011d3 | 1929 | |
sahilmgandhi | 18:6a4db94011d3 | 1930 | event |= SERIAL_EVENT_RX_COMPLETE; |
sahilmgandhi | 18:6a4db94011d3 | 1931 | |
sahilmgandhi | 18:6a4db94011d3 | 1932 | if((buf[obj->rx_buff.pos] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 1933 | |
sahilmgandhi | 18:6a4db94011d3 | 1934 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1935 | return event & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1936 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1937 | /* There's still space in the receive buffer */ |
sahilmgandhi | 18:6a4db94011d3 | 1938 | while(((USART_StatusGet(obj->serial.periph.uart) & USART_STATUS_RXDATAV) || (USART_StatusGet(obj->serial.periph.uart) & USART_IF_RXFULL)) && (obj->rx_buff.pos <= (obj->rx_buff.length - 1))) { |
sahilmgandhi | 18:6a4db94011d3 | 1939 | bool aborting = false; |
sahilmgandhi | 18:6a4db94011d3 | 1940 | buf[obj->rx_buff.pos] = USART_RxDataGet(obj->serial.periph.uart); |
sahilmgandhi | 18:6a4db94011d3 | 1941 | obj->rx_buff.pos++; |
sahilmgandhi | 18:6a4db94011d3 | 1942 | |
sahilmgandhi | 18:6a4db94011d3 | 1943 | /* Check for character match event */ |
sahilmgandhi | 18:6a4db94011d3 | 1944 | if((buf[obj->rx_buff.pos - 1] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) { |
sahilmgandhi | 18:6a4db94011d3 | 1945 | aborting = true; |
sahilmgandhi | 18:6a4db94011d3 | 1946 | event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
sahilmgandhi | 18:6a4db94011d3 | 1947 | } |
sahilmgandhi | 18:6a4db94011d3 | 1948 | |
sahilmgandhi | 18:6a4db94011d3 | 1949 | /* Check for final char event */ |
sahilmgandhi | 18:6a4db94011d3 | 1950 | if(obj->rx_buff.pos >= (obj->rx_buff.length)) { |
sahilmgandhi | 18:6a4db94011d3 | 1951 | aborting = true; |
sahilmgandhi | 18:6a4db94011d3 | 1952 | event |= SERIAL_EVENT_RX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1953 | } |
sahilmgandhi | 18:6a4db94011d3 | 1954 | |
sahilmgandhi | 18:6a4db94011d3 | 1955 | if(aborting) { |
sahilmgandhi | 18:6a4db94011d3 | 1956 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1957 | return event & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1958 | } |
sahilmgandhi | 18:6a4db94011d3 | 1959 | } |
sahilmgandhi | 18:6a4db94011d3 | 1960 | } |
sahilmgandhi | 18:6a4db94011d3 | 1961 | } |
sahilmgandhi | 18:6a4db94011d3 | 1962 | } |
sahilmgandhi | 18:6a4db94011d3 | 1963 | |
sahilmgandhi | 18:6a4db94011d3 | 1964 | /* All events should have generated a return, if no return has happened, no event has been caught */ |
sahilmgandhi | 18:6a4db94011d3 | 1965 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 1966 | } |
sahilmgandhi | 18:6a4db94011d3 | 1967 | |
sahilmgandhi | 18:6a4db94011d3 | 1968 | /** Unified IRQ handler. Determines the appropriate handler to execute and returns the flags. |
sahilmgandhi | 18:6a4db94011d3 | 1969 | * |
sahilmgandhi | 18:6a4db94011d3 | 1970 | * WARNING: this code should be stateless, as re-entrancy is very possible in interrupt-based mode. |
sahilmgandhi | 18:6a4db94011d3 | 1971 | */ |
sahilmgandhi | 18:6a4db94011d3 | 1972 | int serial_irq_handler_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 1973 | { |
sahilmgandhi | 18:6a4db94011d3 | 1974 | uint32_t txc_int; |
sahilmgandhi | 18:6a4db94011d3 | 1975 | |
sahilmgandhi | 18:6a4db94011d3 | 1976 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1977 | txc_int = LEUART_IntGetEnabled(obj->serial.periph.leuart) & LEUART_IF_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 1978 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 1979 | txc_int = USART_IntGetEnabled(obj->serial.periph.uart) & USART_IF_TXC; |
sahilmgandhi | 18:6a4db94011d3 | 1980 | } |
sahilmgandhi | 18:6a4db94011d3 | 1981 | |
sahilmgandhi | 18:6a4db94011d3 | 1982 | /* First, check if we're running in DMA mode */ |
sahilmgandhi | 18:6a4db94011d3 | 1983 | if( (obj->serial.dmaOptionsRX.dmaChannel != -1) && |
sahilmgandhi | 18:6a4db94011d3 | 1984 | serial_dma_irq_fired[obj->serial.dmaOptionsRX.dmaChannel]) { |
sahilmgandhi | 18:6a4db94011d3 | 1985 | /* Clean up */ |
sahilmgandhi | 18:6a4db94011d3 | 1986 | serial_dma_irq_fired[obj->serial.dmaOptionsRX.dmaChannel] = false; |
sahilmgandhi | 18:6a4db94011d3 | 1987 | serial_rx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1988 | |
sahilmgandhi | 18:6a4db94011d3 | 1989 | /* Notify CPP land of RX completion */ |
sahilmgandhi | 18:6a4db94011d3 | 1990 | return SERIAL_EVENT_RX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1991 | } else if (txc_int && (obj->serial.dmaOptionsTX.dmaChannel != -1) && |
sahilmgandhi | 18:6a4db94011d3 | 1992 | serial_dma_irq_fired[obj->serial.dmaOptionsTX.dmaChannel]) { |
sahilmgandhi | 18:6a4db94011d3 | 1993 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 1994 | /* Clean up */ |
sahilmgandhi | 18:6a4db94011d3 | 1995 | serial_dma_irq_fired[obj->serial.dmaOptionsTX.dmaChannel] = false; |
sahilmgandhi | 18:6a4db94011d3 | 1996 | serial_tx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 1997 | /* Notify CPP land of completion */ |
sahilmgandhi | 18:6a4db94011d3 | 1998 | return SERIAL_EVENT_TX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 1999 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 2000 | /* Clean up */ |
sahilmgandhi | 18:6a4db94011d3 | 2001 | serial_dma_irq_fired[obj->serial.dmaOptionsTX.dmaChannel] = false; |
sahilmgandhi | 18:6a4db94011d3 | 2002 | serial_tx_abort_asynch_intern(obj, 1); |
sahilmgandhi | 18:6a4db94011d3 | 2003 | /* Notify CPP land of completion */ |
sahilmgandhi | 18:6a4db94011d3 | 2004 | return SERIAL_EVENT_TX_COMPLETE & obj->serial.events; |
sahilmgandhi | 18:6a4db94011d3 | 2005 | } |
sahilmgandhi | 18:6a4db94011d3 | 2006 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 2007 | /* Check the NVIC to see which interrupt we're running from |
sahilmgandhi | 18:6a4db94011d3 | 2008 | * Also make sure to prioritize RX */ |
sahilmgandhi | 18:6a4db94011d3 | 2009 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 2010 | //Different method of checking tx vs rx for LEUART |
sahilmgandhi | 18:6a4db94011d3 | 2011 | if(LEUART_IntGetEnabled(obj->serial.periph.leuart) & (LEUART_IF_RXDATAV | LEUART_IF_FERR | LEUART_IF_PERR | LEUART_IF_RXOF)) { |
sahilmgandhi | 18:6a4db94011d3 | 2012 | return serial_rx_irq_handler_asynch(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2013 | } else if(LEUART_StatusGet(obj->serial.periph.leuart) & (LEUART_STATUS_TXBL | LEUART_STATUS_TXC)) { |
sahilmgandhi | 18:6a4db94011d3 | 2014 | return serial_tx_irq_handler_asynch(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2015 | } |
sahilmgandhi | 18:6a4db94011d3 | 2016 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 2017 | if(USART_IntGetEnabled(obj->serial.periph.uart) & (USART_IF_RXDATAV | USART_IF_RXOF | USART_IF_PERR | USART_IF_FERR)) { |
sahilmgandhi | 18:6a4db94011d3 | 2018 | return serial_rx_irq_handler_asynch(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2019 | } else if(USART_StatusGet(obj->serial.periph.uart) & (USART_STATUS_TXBL | USART_STATUS_TXC)){ |
sahilmgandhi | 18:6a4db94011d3 | 2020 | return serial_tx_irq_handler_asynch(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2021 | } |
sahilmgandhi | 18:6a4db94011d3 | 2022 | } |
sahilmgandhi | 18:6a4db94011d3 | 2023 | } |
sahilmgandhi | 18:6a4db94011d3 | 2024 | |
sahilmgandhi | 18:6a4db94011d3 | 2025 | // All should be done now |
sahilmgandhi | 18:6a4db94011d3 | 2026 | return 0; |
sahilmgandhi | 18:6a4db94011d3 | 2027 | } |
sahilmgandhi | 18:6a4db94011d3 | 2028 | |
sahilmgandhi | 18:6a4db94011d3 | 2029 | /** Abort the ongoing TX transaction. It disables the enabled interupt for TX and |
sahilmgandhi | 18:6a4db94011d3 | 2030 | * flush TX hardware buffer if TX FIFO is used |
sahilmgandhi | 18:6a4db94011d3 | 2031 | * |
sahilmgandhi | 18:6a4db94011d3 | 2032 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 2033 | */ |
sahilmgandhi | 18:6a4db94011d3 | 2034 | void serial_tx_abort_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 2035 | { |
sahilmgandhi | 18:6a4db94011d3 | 2036 | serial_tx_abort_asynch_intern(obj, 0); |
sahilmgandhi | 18:6a4db94011d3 | 2037 | } |
sahilmgandhi | 18:6a4db94011d3 | 2038 | |
sahilmgandhi | 18:6a4db94011d3 | 2039 | static void serial_tx_abort_asynch_intern(serial_t *obj, int unblock_sleep) |
sahilmgandhi | 18:6a4db94011d3 | 2040 | { |
sahilmgandhi | 18:6a4db94011d3 | 2041 | // Transmitter should be disabled here but there are multiple issues |
sahilmgandhi | 18:6a4db94011d3 | 2042 | // making that quite difficult. |
sahilmgandhi | 18:6a4db94011d3 | 2043 | // |
sahilmgandhi | 18:6a4db94011d3 | 2044 | // - Disabling the transmitter when using DMA on platforms prior to |
sahilmgandhi | 18:6a4db94011d3 | 2045 | // Pearl can cause the UART to leave the line low, generating a break |
sahilmgandhi | 18:6a4db94011d3 | 2046 | // condition until the next transmission begins. |
sahilmgandhi | 18:6a4db94011d3 | 2047 | // |
sahilmgandhi | 18:6a4db94011d3 | 2048 | // - On (at least) Pearl, once TXC interrupt has fired it will take some time |
sahilmgandhi | 18:6a4db94011d3 | 2049 | // (some tens of microsec) for TXC to be set in STATUS. If we turn off |
sahilmgandhi | 18:6a4db94011d3 | 2050 | // the transmitter before this, bad things will happen. |
sahilmgandhi | 18:6a4db94011d3 | 2051 | // |
sahilmgandhi | 18:6a4db94011d3 | 2052 | // - On (at least) Pearl, when using TX DMA it is possible for the USART |
sahilmgandhi | 18:6a4db94011d3 | 2053 | // status to be: TXENS TXBL TXIDLE = 1, TXBUFCNT = 0, but TXC = 0. |
sahilmgandhi | 18:6a4db94011d3 | 2054 | // |
sahilmgandhi | 18:6a4db94011d3 | 2055 | // All in all, the logic was so fragile it's best to leave it out. |
sahilmgandhi | 18:6a4db94011d3 | 2056 | |
sahilmgandhi | 18:6a4db94011d3 | 2057 | /* Clean up */ |
sahilmgandhi | 18:6a4db94011d3 | 2058 | switch(obj->serial.dmaOptionsTX.dmaUsageState) { |
sahilmgandhi | 18:6a4db94011d3 | 2059 | case DMA_USAGE_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 2060 | /* stop DMA transfer */ |
sahilmgandhi | 18:6a4db94011d3 | 2061 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 2062 | DMA_ChannelEnable(obj->serial.dmaOptionsTX.dmaChannel, false); |
sahilmgandhi | 18:6a4db94011d3 | 2063 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2064 | LDMA_StopTransfer(obj->serial.dmaOptionsTX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2065 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2066 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2067 | case DMA_USAGE_TEMPORARY_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 2068 | /* stop DMA transfer and release channel */ |
sahilmgandhi | 18:6a4db94011d3 | 2069 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 2070 | DMA_ChannelEnable(obj->serial.dmaOptionsTX.dmaChannel, false); |
sahilmgandhi | 18:6a4db94011d3 | 2071 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2072 | LDMA_StopTransfer(obj->serial.dmaOptionsTX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2073 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2074 | dma_channel_free(obj->serial.dmaOptionsTX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2075 | obj->serial.dmaOptionsTX.dmaChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 2076 | obj->serial.dmaOptionsTX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC; |
sahilmgandhi | 18:6a4db94011d3 | 2077 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2078 | default: |
sahilmgandhi | 18:6a4db94011d3 | 2079 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2080 | } |
sahilmgandhi | 18:6a4db94011d3 | 2081 | |
sahilmgandhi | 18:6a4db94011d3 | 2082 | /* stop interrupting */ |
sahilmgandhi | 18:6a4db94011d3 | 2083 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 2084 | LEUART_IntDisable(obj->serial.periph.leuart, LEUART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 2085 | LEUART_IntDisable(obj->serial.periph.leuart, LEUART_IEN_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 2086 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 2087 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 2088 | USART_IntDisable(obj->serial.periph.uart, USART_IEN_TXBL); |
sahilmgandhi | 18:6a4db94011d3 | 2089 | USART_IntDisable(obj->serial.periph.uart, USART_IEN_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 2090 | USART_IntClear(obj->serial.periph.uart, USART_IFC_TXC); |
sahilmgandhi | 18:6a4db94011d3 | 2091 | } |
sahilmgandhi | 18:6a4db94011d3 | 2092 | |
sahilmgandhi | 18:6a4db94011d3 | 2093 | /* Say that we can stop using this emode */ |
sahilmgandhi | 18:6a4db94011d3 | 2094 | if(unblock_sleep) |
sahilmgandhi | 18:6a4db94011d3 | 2095 | serial_unblock_sleep(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2096 | } |
sahilmgandhi | 18:6a4db94011d3 | 2097 | |
sahilmgandhi | 18:6a4db94011d3 | 2098 | |
sahilmgandhi | 18:6a4db94011d3 | 2099 | static void serial_unblock_sleep(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 2100 | { |
sahilmgandhi | 18:6a4db94011d3 | 2101 | if( obj->serial.sleep_blocked > 0 ) { |
sahilmgandhi | 18:6a4db94011d3 | 2102 | #ifdef LEUART_USING_LFXO |
sahilmgandhi | 18:6a4db94011d3 | 2103 | if(LEUART_REF_VALID(obj->serial.periph.leuart) && (LEUART_BaudrateGet(obj->serial.periph.leuart) <= (LEUART_LF_REF_FREQ/2))){ |
sahilmgandhi | 18:6a4db94011d3 | 2104 | unblockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE_LEUART); |
sahilmgandhi | 18:6a4db94011d3 | 2105 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 2106 | unblockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE); |
sahilmgandhi | 18:6a4db94011d3 | 2107 | } |
sahilmgandhi | 18:6a4db94011d3 | 2108 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2109 | unblockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE); |
sahilmgandhi | 18:6a4db94011d3 | 2110 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2111 | obj->serial.sleep_blocked--; |
sahilmgandhi | 18:6a4db94011d3 | 2112 | } |
sahilmgandhi | 18:6a4db94011d3 | 2113 | } |
sahilmgandhi | 18:6a4db94011d3 | 2114 | |
sahilmgandhi | 18:6a4db94011d3 | 2115 | static void serial_block_sleep(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 2116 | { |
sahilmgandhi | 18:6a4db94011d3 | 2117 | obj->serial.sleep_blocked++; |
sahilmgandhi | 18:6a4db94011d3 | 2118 | #ifdef LEUART_USING_LFXO |
sahilmgandhi | 18:6a4db94011d3 | 2119 | if(LEUART_REF_VALID(obj->serial.periph.leuart) && (LEUART_BaudrateGet(obj->serial.periph.leuart) <= (LEUART_LF_REF_FREQ/2))){ |
sahilmgandhi | 18:6a4db94011d3 | 2120 | blockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE_LEUART); |
sahilmgandhi | 18:6a4db94011d3 | 2121 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 2122 | blockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE); |
sahilmgandhi | 18:6a4db94011d3 | 2123 | } |
sahilmgandhi | 18:6a4db94011d3 | 2124 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2125 | blockSleepMode(SERIAL_LEAST_ACTIVE_SLEEPMODE); |
sahilmgandhi | 18:6a4db94011d3 | 2126 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2127 | } |
sahilmgandhi | 18:6a4db94011d3 | 2128 | |
sahilmgandhi | 18:6a4db94011d3 | 2129 | /** Abort the ongoing RX transaction It disables the enabled interrupt for RX and |
sahilmgandhi | 18:6a4db94011d3 | 2130 | * flush RX hardware buffer if RX FIFO is used |
sahilmgandhi | 18:6a4db94011d3 | 2131 | * |
sahilmgandhi | 18:6a4db94011d3 | 2132 | * @param obj The serial object |
sahilmgandhi | 18:6a4db94011d3 | 2133 | */ |
sahilmgandhi | 18:6a4db94011d3 | 2134 | void serial_rx_abort_asynch(serial_t *obj) |
sahilmgandhi | 18:6a4db94011d3 | 2135 | { |
sahilmgandhi | 18:6a4db94011d3 | 2136 | serial_rx_abort_asynch_intern(obj, 0); |
sahilmgandhi | 18:6a4db94011d3 | 2137 | } |
sahilmgandhi | 18:6a4db94011d3 | 2138 | |
sahilmgandhi | 18:6a4db94011d3 | 2139 | static void serial_rx_abort_asynch_intern(serial_t *obj, int unblock_sleep) |
sahilmgandhi | 18:6a4db94011d3 | 2140 | { |
sahilmgandhi | 18:6a4db94011d3 | 2141 | /* Stop receiver */ |
sahilmgandhi | 18:6a4db94011d3 | 2142 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 2143 | obj->serial.periph.leuart->CMD = LEUART_CMD_RXDIS; |
sahilmgandhi | 18:6a4db94011d3 | 2144 | while(obj->serial.periph.leuart->SYNCBUSY & LEUART_SYNCBUSY_CMD); |
sahilmgandhi | 18:6a4db94011d3 | 2145 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 2146 | obj->serial.periph.uart->CMD = USART_CMD_RXDIS; |
sahilmgandhi | 18:6a4db94011d3 | 2147 | } |
sahilmgandhi | 18:6a4db94011d3 | 2148 | |
sahilmgandhi | 18:6a4db94011d3 | 2149 | /* Clean up */ |
sahilmgandhi | 18:6a4db94011d3 | 2150 | switch(obj->serial.dmaOptionsRX.dmaUsageState) { |
sahilmgandhi | 18:6a4db94011d3 | 2151 | case DMA_USAGE_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 2152 | /* stop DMA transfer */ |
sahilmgandhi | 18:6a4db94011d3 | 2153 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 2154 | DMA_ChannelEnable(obj->serial.dmaOptionsRX.dmaChannel, false); |
sahilmgandhi | 18:6a4db94011d3 | 2155 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2156 | LDMA_StopTransfer(obj->serial.dmaOptionsRX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2157 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2158 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2159 | case DMA_USAGE_TEMPORARY_ALLOCATED: |
sahilmgandhi | 18:6a4db94011d3 | 2160 | /* stop DMA transfer and release channel */ |
sahilmgandhi | 18:6a4db94011d3 | 2161 | #ifndef LDMA_PRESENT |
sahilmgandhi | 18:6a4db94011d3 | 2162 | DMA_ChannelEnable(obj->serial.dmaOptionsRX.dmaChannel, false); |
sahilmgandhi | 18:6a4db94011d3 | 2163 | #else |
sahilmgandhi | 18:6a4db94011d3 | 2164 | LDMA_StopTransfer(obj->serial.dmaOptionsRX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2165 | #endif |
sahilmgandhi | 18:6a4db94011d3 | 2166 | dma_channel_free(obj->serial.dmaOptionsRX.dmaChannel); |
sahilmgandhi | 18:6a4db94011d3 | 2167 | obj->serial.dmaOptionsRX.dmaChannel = -1; |
sahilmgandhi | 18:6a4db94011d3 | 2168 | obj->serial.dmaOptionsRX.dmaUsageState = DMA_USAGE_OPPORTUNISTIC; |
sahilmgandhi | 18:6a4db94011d3 | 2169 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2170 | default: |
sahilmgandhi | 18:6a4db94011d3 | 2171 | /* stop interrupting */ |
sahilmgandhi | 18:6a4db94011d3 | 2172 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 2173 | LEUART_IntDisable(obj->serial.periph.leuart, LEUART_IEN_RXDATAV | LEUART_IEN_PERR | LEUART_IEN_FERR | LEUART_IEN_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 2174 | } else { |
sahilmgandhi | 18:6a4db94011d3 | 2175 | USART_IntDisable(obj->serial.periph.uart, USART_IEN_RXDATAV | USART_IEN_PERR | USART_IEN_FERR | USART_IEN_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 2176 | } |
sahilmgandhi | 18:6a4db94011d3 | 2177 | break; |
sahilmgandhi | 18:6a4db94011d3 | 2178 | } |
sahilmgandhi | 18:6a4db94011d3 | 2179 | |
sahilmgandhi | 18:6a4db94011d3 | 2180 | /*clear all set interrupts*/ |
sahilmgandhi | 18:6a4db94011d3 | 2181 | if(LEUART_REF_VALID(obj->serial.periph.leuart)) { |
sahilmgandhi | 18:6a4db94011d3 | 2182 | LEUART_IntClear(obj->serial.periph.leuart, LEUART_IFC_PERR | LEUART_IFC_FERR | LEUART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 2183 | }else{ |
sahilmgandhi | 18:6a4db94011d3 | 2184 | USART_IntClear(obj->serial.periph.uart, USART_IFC_PERR | USART_IFC_FERR | USART_IFC_RXOF); |
sahilmgandhi | 18:6a4db94011d3 | 2185 | } |
sahilmgandhi | 18:6a4db94011d3 | 2186 | |
sahilmgandhi | 18:6a4db94011d3 | 2187 | /* Say that we can stop using this emode */ |
sahilmgandhi | 18:6a4db94011d3 | 2188 | if( unblock_sleep ) |
sahilmgandhi | 18:6a4db94011d3 | 2189 | serial_unblock_sleep(obj); |
sahilmgandhi | 18:6a4db94011d3 | 2190 | } |
sahilmgandhi | 18:6a4db94011d3 | 2191 | |
sahilmgandhi | 18:6a4db94011d3 | 2192 | #endif //DEVICE_SERIAL_ASYNCH |
sahilmgandhi | 18:6a4db94011d3 | 2193 | #endif //DEVICE_SERIAL |