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targets/hal/TARGET_Atmel/TARGET_SAM_CortexM0P/serial_api.c@15:a81a8d6c1dfe, 2015-11-04 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Nov 04 16:30:11 2015 +0000
- Revision:
- 15:a81a8d6c1dfe
- Child:
- 18:da299f395b9e
Synchronized with git revision 46af745ef4405614c3fa49abbd9a706a362ea514
Full URL: https://github.com/mbedmicro/mbed/commit/46af745ef4405614c3fa49abbd9a706a362ea514/
Renamed TARGET_SAM_CortexM0+ to TARGET_SAM_CortexM0P for compatiblity with online compiler
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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mbed_official | 15:a81a8d6c1dfe | 1 | /* mbed Microcontroller Library |
mbed_official | 15:a81a8d6c1dfe | 2 | * Copyright (c) 2006-2015 ARM Limited |
mbed_official | 15:a81a8d6c1dfe | 3 | * |
mbed_official | 15:a81a8d6c1dfe | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 15:a81a8d6c1dfe | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 15:a81a8d6c1dfe | 6 | * You may obtain a copy of the License at |
mbed_official | 15:a81a8d6c1dfe | 7 | * |
mbed_official | 15:a81a8d6c1dfe | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 15:a81a8d6c1dfe | 9 | * |
mbed_official | 15:a81a8d6c1dfe | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 15:a81a8d6c1dfe | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 15:a81a8d6c1dfe | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 15:a81a8d6c1dfe | 13 | * See the License for the specific language governing permissions and |
mbed_official | 15:a81a8d6c1dfe | 14 | * limitations under the License. |
mbed_official | 15:a81a8d6c1dfe | 15 | */ |
mbed_official | 15:a81a8d6c1dfe | 16 | #include <string.h> |
mbed_official | 15:a81a8d6c1dfe | 17 | #include "mbed_assert.h" |
mbed_official | 15:a81a8d6c1dfe | 18 | #include "cmsis.h" |
mbed_official | 15:a81a8d6c1dfe | 19 | #include "serial_api.h" |
mbed_official | 15:a81a8d6c1dfe | 20 | #include "pinmap.h" |
mbed_official | 15:a81a8d6c1dfe | 21 | #include "PeripheralPins.h" |
mbed_official | 15:a81a8d6c1dfe | 22 | #include "usart.h" |
mbed_official | 15:a81a8d6c1dfe | 23 | #include "pinmap_function.h" |
mbed_official | 15:a81a8d6c1dfe | 24 | |
mbed_official | 15:a81a8d6c1dfe | 25 | #define USART_TX_INDEX 0 |
mbed_official | 15:a81a8d6c1dfe | 26 | #define USART_RX_INDEX 1 |
mbed_official | 15:a81a8d6c1dfe | 27 | #define USART_RXFLOW_INDEX 2 |
mbed_official | 15:a81a8d6c1dfe | 28 | #define USART_TXFLOW_INDEX 3 |
mbed_official | 15:a81a8d6c1dfe | 29 | |
mbed_official | 15:a81a8d6c1dfe | 30 | #if DEVICE_SERIAL_ASYNCH |
mbed_official | 15:a81a8d6c1dfe | 31 | #define pUSART_S(obj) obj->serial.usart |
mbed_official | 15:a81a8d6c1dfe | 32 | #define pSERIAL_S(obj) ((struct serial_s*)&(obj->serial)) |
mbed_official | 15:a81a8d6c1dfe | 33 | #else |
mbed_official | 15:a81a8d6c1dfe | 34 | #define pUSART_S(obj) obj->usart |
mbed_official | 15:a81a8d6c1dfe | 35 | #define pSERIAL_S(obj) ((struct serial_s*)obj) |
mbed_official | 15:a81a8d6c1dfe | 36 | #endif |
mbed_official | 15:a81a8d6c1dfe | 37 | #define _USART(obj) pUSART_S(obj)->USART |
mbed_official | 15:a81a8d6c1dfe | 38 | #define USART_NUM 6 |
mbed_official | 15:a81a8d6c1dfe | 39 | |
mbed_official | 15:a81a8d6c1dfe | 40 | |
mbed_official | 15:a81a8d6c1dfe | 41 | uint8_t serial_get_index(serial_t *obj); |
mbed_official | 15:a81a8d6c1dfe | 42 | IRQn_Type get_serial_irq_num (serial_t *obj); |
mbed_official | 15:a81a8d6c1dfe | 43 | uint32_t get_serial_vector (serial_t *obj); |
mbed_official | 15:a81a8d6c1dfe | 44 | void uart0_irq(); |
mbed_official | 15:a81a8d6c1dfe | 45 | void uart1_irq(); |
mbed_official | 15:a81a8d6c1dfe | 46 | void uart2_irq(); |
mbed_official | 15:a81a8d6c1dfe | 47 | void uart3_irq(); |
mbed_official | 15:a81a8d6c1dfe | 48 | void uart4_irq(); |
mbed_official | 15:a81a8d6c1dfe | 49 | void uart5_irq(); |
mbed_official | 15:a81a8d6c1dfe | 50 | |
mbed_official | 15:a81a8d6c1dfe | 51 | static uint32_t serial_irq_ids[USART_NUM] = {0}; |
mbed_official | 15:a81a8d6c1dfe | 52 | static uart_irq_handler irq_handler; |
mbed_official | 15:a81a8d6c1dfe | 53 | |
mbed_official | 15:a81a8d6c1dfe | 54 | int stdio_uart_inited = 0; |
mbed_official | 15:a81a8d6c1dfe | 55 | serial_t stdio_uart; |
mbed_official | 15:a81a8d6c1dfe | 56 | |
mbed_official | 15:a81a8d6c1dfe | 57 | extern uint8_t g_sys_init; |
mbed_official | 15:a81a8d6c1dfe | 58 | |
mbed_official | 15:a81a8d6c1dfe | 59 | static inline void usart_syncing(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 60 | { |
mbed_official | 15:a81a8d6c1dfe | 61 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 62 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 63 | |
mbed_official | 15:a81a8d6c1dfe | 64 | while(_USART(obj).SYNCBUSY.reg); |
mbed_official | 15:a81a8d6c1dfe | 65 | } |
mbed_official | 15:a81a8d6c1dfe | 66 | |
mbed_official | 15:a81a8d6c1dfe | 67 | static inline void enable_usart(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 68 | { |
mbed_official | 15:a81a8d6c1dfe | 69 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 70 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 71 | |
mbed_official | 15:a81a8d6c1dfe | 72 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 73 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 74 | |
mbed_official | 15:a81a8d6c1dfe | 75 | /* Enable USART module */ |
mbed_official | 15:a81a8d6c1dfe | 76 | _USART(obj).CTRLA.reg |= SERCOM_USART_CTRLA_ENABLE; |
mbed_official | 15:a81a8d6c1dfe | 77 | } |
mbed_official | 15:a81a8d6c1dfe | 78 | |
mbed_official | 15:a81a8d6c1dfe | 79 | static inline void disable_usart(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 80 | { |
mbed_official | 15:a81a8d6c1dfe | 81 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 82 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 83 | |
mbed_official | 15:a81a8d6c1dfe | 84 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 85 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 86 | |
mbed_official | 15:a81a8d6c1dfe | 87 | /* Disable USART module */ |
mbed_official | 15:a81a8d6c1dfe | 88 | _USART(obj).CTRLA.reg &= ~SERCOM_USART_CTRLA_ENABLE; |
mbed_official | 15:a81a8d6c1dfe | 89 | } |
mbed_official | 15:a81a8d6c1dfe | 90 | |
mbed_official | 15:a81a8d6c1dfe | 91 | static inline void reset_usart(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 92 | { |
mbed_official | 15:a81a8d6c1dfe | 93 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 94 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 95 | |
mbed_official | 15:a81a8d6c1dfe | 96 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 97 | |
mbed_official | 15:a81a8d6c1dfe | 98 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 99 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 100 | |
mbed_official | 15:a81a8d6c1dfe | 101 | /* Reset module */ |
mbed_official | 15:a81a8d6c1dfe | 102 | _USART(obj).CTRLA.reg = SERCOM_USART_CTRLA_SWRST; |
mbed_official | 15:a81a8d6c1dfe | 103 | } |
mbed_official | 15:a81a8d6c1dfe | 104 | |
mbed_official | 15:a81a8d6c1dfe | 105 | uint32_t serial_find_mux_settings (serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 106 | { |
mbed_official | 15:a81a8d6c1dfe | 107 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 108 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 109 | uint32_t mux_setting = 0; |
mbed_official | 15:a81a8d6c1dfe | 110 | uint32_t pinpad[4] = {0}; |
mbed_official | 15:a81a8d6c1dfe | 111 | uint8_t i = 0; |
mbed_official | 15:a81a8d6c1dfe | 112 | uint32_t sercom_index = pinmap_merge_sercom(pSERIAL_S(obj)->pins[0], pSERIAL_S(obj)->pins[1]); |
mbed_official | 15:a81a8d6c1dfe | 113 | |
mbed_official | 15:a81a8d6c1dfe | 114 | for (i = 0; i < 4 ; i++) { |
mbed_official | 15:a81a8d6c1dfe | 115 | pinpad[i] = pinmap_pad_sercom(pSERIAL_S(obj)->pins[i], sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 116 | } |
mbed_official | 15:a81a8d6c1dfe | 117 | |
mbed_official | 15:a81a8d6c1dfe | 118 | switch(pinpad[USART_RX_INDEX]) { |
mbed_official | 15:a81a8d6c1dfe | 119 | case 0: |
mbed_official | 15:a81a8d6c1dfe | 120 | mux_setting |= SERCOM_USART_CTRLA_RXPO(0); |
mbed_official | 15:a81a8d6c1dfe | 121 | break; |
mbed_official | 15:a81a8d6c1dfe | 122 | case 1: |
mbed_official | 15:a81a8d6c1dfe | 123 | mux_setting |= SERCOM_USART_CTRLA_RXPO(1); |
mbed_official | 15:a81a8d6c1dfe | 124 | break; |
mbed_official | 15:a81a8d6c1dfe | 125 | case 2: |
mbed_official | 15:a81a8d6c1dfe | 126 | mux_setting |= SERCOM_USART_CTRLA_RXPO(2); |
mbed_official | 15:a81a8d6c1dfe | 127 | break; |
mbed_official | 15:a81a8d6c1dfe | 128 | case 3: |
mbed_official | 15:a81a8d6c1dfe | 129 | mux_setting |= SERCOM_USART_CTRLA_RXPO(3); |
mbed_official | 15:a81a8d6c1dfe | 130 | break; |
mbed_official | 15:a81a8d6c1dfe | 131 | } |
mbed_official | 15:a81a8d6c1dfe | 132 | |
mbed_official | 15:a81a8d6c1dfe | 133 | if ((pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX] == NC) && (pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX] == NC)) { |
mbed_official | 15:a81a8d6c1dfe | 134 | if (pinpad[USART_TX_INDEX] == 0) { |
mbed_official | 15:a81a8d6c1dfe | 135 | mux_setting |= SERCOM_USART_CTRLA_TXPO(0); |
mbed_official | 15:a81a8d6c1dfe | 136 | } else if(pinpad[USART_TX_INDEX] == 2) { |
mbed_official | 15:a81a8d6c1dfe | 137 | mux_setting |= SERCOM_USART_CTRLA_TXPO(1); |
mbed_official | 15:a81a8d6c1dfe | 138 | } else { |
mbed_official | 15:a81a8d6c1dfe | 139 | } |
mbed_official | 15:a81a8d6c1dfe | 140 | } else { // for hardware flow control and uart // expecting the tx in pad 0, rts in pad2 and cts in pad 3 |
mbed_official | 15:a81a8d6c1dfe | 141 | if((pinpad[USART_TX_INDEX] == 0) && (pinpad[USART_RXFLOW_INDEX]/*rts pin*/ == 2) && (pinpad[USART_TXFLOW_INDEX] /*cts pin*/ == 3)) { |
mbed_official | 15:a81a8d6c1dfe | 142 | mux_setting |= SERCOM_USART_CTRLA_TXPO(2); |
mbed_official | 15:a81a8d6c1dfe | 143 | } |
mbed_official | 15:a81a8d6c1dfe | 144 | } |
mbed_official | 15:a81a8d6c1dfe | 145 | return mux_setting; |
mbed_official | 15:a81a8d6c1dfe | 146 | } |
mbed_official | 15:a81a8d6c1dfe | 147 | |
mbed_official | 15:a81a8d6c1dfe | 148 | static enum status_code usart_set_config_default(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 149 | { |
mbed_official | 15:a81a8d6c1dfe | 150 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 151 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 152 | /* Index for generic clock */ |
mbed_official | 15:a81a8d6c1dfe | 153 | uint32_t sercom_index = _sercom_get_sercom_inst_index(pUSART_S(obj)); |
mbed_official | 15:a81a8d6c1dfe | 154 | uint32_t gclk_index = sercom_index + SERCOM0_GCLK_ID_CORE; |
mbed_official | 15:a81a8d6c1dfe | 155 | |
mbed_official | 15:a81a8d6c1dfe | 156 | /* Cache new register values to minimize the number of register writes */ |
mbed_official | 15:a81a8d6c1dfe | 157 | uint32_t ctrla = 0; |
mbed_official | 15:a81a8d6c1dfe | 158 | uint32_t ctrlb = 0; |
mbed_official | 15:a81a8d6c1dfe | 159 | uint16_t baud = 0; |
mbed_official | 15:a81a8d6c1dfe | 160 | |
mbed_official | 15:a81a8d6c1dfe | 161 | enum sercom_asynchronous_operation_mode mode = SERCOM_ASYNC_OPERATION_MODE_ARITHMETIC; |
mbed_official | 15:a81a8d6c1dfe | 162 | enum sercom_asynchronous_sample_num sample_num = SERCOM_ASYNC_SAMPLE_NUM_16; |
mbed_official | 15:a81a8d6c1dfe | 163 | |
mbed_official | 15:a81a8d6c1dfe | 164 | /* Set data order, internal muxing, and clock polarity */ |
mbed_official | 15:a81a8d6c1dfe | 165 | ctrla = (uint32_t)USART_DATAORDER_LSB | // data order |
mbed_official | 15:a81a8d6c1dfe | 166 | (uint32_t)pSERIAL_S(obj)->mux_setting; // mux setting // clock polarity is not used |
mbed_official | 15:a81a8d6c1dfe | 167 | |
mbed_official | 15:a81a8d6c1dfe | 168 | |
mbed_official | 15:a81a8d6c1dfe | 169 | /* Get baud value from mode and clock */ |
mbed_official | 15:a81a8d6c1dfe | 170 | _sercom_get_async_baud_val(pSERIAL_S(obj)->baudrate,system_gclk_chan_get_hz(gclk_index), &baud, mode, sample_num); // for asynchronous transfer mode |
mbed_official | 15:a81a8d6c1dfe | 171 | |
mbed_official | 15:a81a8d6c1dfe | 172 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 173 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 174 | |
mbed_official | 15:a81a8d6c1dfe | 175 | /*Set baud val */ |
mbed_official | 15:a81a8d6c1dfe | 176 | _USART(obj).BAUD.reg = baud; |
mbed_official | 15:a81a8d6c1dfe | 177 | |
mbed_official | 15:a81a8d6c1dfe | 178 | /* Set sample mode */ |
mbed_official | 15:a81a8d6c1dfe | 179 | ctrla |= USART_TRANSFER_ASYNCHRONOUSLY; |
mbed_official | 15:a81a8d6c1dfe | 180 | |
mbed_official | 15:a81a8d6c1dfe | 181 | /* for disabled external clock source */ |
mbed_official | 15:a81a8d6c1dfe | 182 | ctrla |= SERCOM_USART_CTRLA_MODE(0x1); |
mbed_official | 15:a81a8d6c1dfe | 183 | |
mbed_official | 15:a81a8d6c1dfe | 184 | /* Set stopbits, character size and enable transceivers */ |
mbed_official | 15:a81a8d6c1dfe | 185 | ctrlb = (uint32_t)pSERIAL_S(obj)->stopbits | (uint32_t)pSERIAL_S(obj)->character_size | |
mbed_official | 15:a81a8d6c1dfe | 186 | SERCOM_USART_CTRLB_RXEN | SERCOM_USART_CTRLB_TXEN; /*transmitter and receiver enable*/ |
mbed_official | 15:a81a8d6c1dfe | 187 | if (pSERIAL_S(obj)->pins[USART_RX_INDEX] == NC) { /* if pin is NC, have to disable the corresponding transmitter/receiver part */ |
mbed_official | 15:a81a8d6c1dfe | 188 | ctrlb &= ~SERCOM_USART_CTRLB_RXEN; /* receiver disable */ |
mbed_official | 15:a81a8d6c1dfe | 189 | } |
mbed_official | 15:a81a8d6c1dfe | 190 | if (pSERIAL_S(obj)->pins[USART_TX_INDEX] == NC) { |
mbed_official | 15:a81a8d6c1dfe | 191 | ctrlb &= ~SERCOM_USART_CTRLB_TXEN; /* transmitter disable */ |
mbed_official | 15:a81a8d6c1dfe | 192 | } |
mbed_official | 15:a81a8d6c1dfe | 193 | |
mbed_official | 15:a81a8d6c1dfe | 194 | /* Check parity mode bits */ |
mbed_official | 15:a81a8d6c1dfe | 195 | if (pSERIAL_S(obj)->parity != USART_PARITY_NONE) { |
mbed_official | 15:a81a8d6c1dfe | 196 | ctrla |= SERCOM_USART_CTRLA_FORM(1); |
mbed_official | 15:a81a8d6c1dfe | 197 | ctrlb |= pSERIAL_S(obj)->parity; |
mbed_official | 15:a81a8d6c1dfe | 198 | } else { |
mbed_official | 15:a81a8d6c1dfe | 199 | ctrla |= SERCOM_USART_CTRLA_FORM(0); |
mbed_official | 15:a81a8d6c1dfe | 200 | } |
mbed_official | 15:a81a8d6c1dfe | 201 | |
mbed_official | 15:a81a8d6c1dfe | 202 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 203 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 204 | |
mbed_official | 15:a81a8d6c1dfe | 205 | /* Write configuration to CTRLB */ |
mbed_official | 15:a81a8d6c1dfe | 206 | _USART(obj).CTRLB.reg = ctrlb; |
mbed_official | 15:a81a8d6c1dfe | 207 | |
mbed_official | 15:a81a8d6c1dfe | 208 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 209 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 210 | |
mbed_official | 15:a81a8d6c1dfe | 211 | /* Write configuration to CTRLA */ |
mbed_official | 15:a81a8d6c1dfe | 212 | _USART(obj).CTRLA.reg = ctrla; |
mbed_official | 15:a81a8d6c1dfe | 213 | |
mbed_official | 15:a81a8d6c1dfe | 214 | return STATUS_OK; |
mbed_official | 15:a81a8d6c1dfe | 215 | } |
mbed_official | 15:a81a8d6c1dfe | 216 | |
mbed_official | 15:a81a8d6c1dfe | 217 | void get_default_serial_values(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 218 | { |
mbed_official | 15:a81a8d6c1dfe | 219 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 220 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 221 | /* Set default config to object */ |
mbed_official | 15:a81a8d6c1dfe | 222 | pSERIAL_S(obj)->parity = USART_PARITY_NONE; |
mbed_official | 15:a81a8d6c1dfe | 223 | pSERIAL_S(obj)->stopbits = USART_STOPBITS_1; |
mbed_official | 15:a81a8d6c1dfe | 224 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_8BIT; |
mbed_official | 15:a81a8d6c1dfe | 225 | pSERIAL_S(obj)->baudrate = 9600; |
mbed_official | 15:a81a8d6c1dfe | 226 | pSERIAL_S(obj)->mux_setting = USART_RX_1_TX_2_XCK_3; |
mbed_official | 15:a81a8d6c1dfe | 227 | }; |
mbed_official | 15:a81a8d6c1dfe | 228 | |
mbed_official | 15:a81a8d6c1dfe | 229 | void serial_init(serial_t *obj, PinName tx, PinName rx) |
mbed_official | 15:a81a8d6c1dfe | 230 | { |
mbed_official | 15:a81a8d6c1dfe | 231 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 232 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 233 | if (g_sys_init == 0) { |
mbed_official | 15:a81a8d6c1dfe | 234 | system_init(); |
mbed_official | 15:a81a8d6c1dfe | 235 | g_sys_init = 1; |
mbed_official | 15:a81a8d6c1dfe | 236 | } |
mbed_official | 15:a81a8d6c1dfe | 237 | struct system_gclk_chan_config gclk_chan_conf; |
mbed_official | 15:a81a8d6c1dfe | 238 | UARTName uart; |
mbed_official | 15:a81a8d6c1dfe | 239 | uint32_t gclk_index; |
mbed_official | 15:a81a8d6c1dfe | 240 | uint32_t pm_index; |
mbed_official | 15:a81a8d6c1dfe | 241 | uint32_t sercom_index = 0; |
mbed_official | 15:a81a8d6c1dfe | 242 | uint32_t muxsetting = 0; |
mbed_official | 15:a81a8d6c1dfe | 243 | |
mbed_official | 15:a81a8d6c1dfe | 244 | get_default_serial_values(obj); |
mbed_official | 15:a81a8d6c1dfe | 245 | |
mbed_official | 15:a81a8d6c1dfe | 246 | pSERIAL_S(obj)->pins[USART_TX_INDEX] = tx; |
mbed_official | 15:a81a8d6c1dfe | 247 | pSERIAL_S(obj)->pins[USART_RX_INDEX] = rx; |
mbed_official | 15:a81a8d6c1dfe | 248 | pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX] = NC; |
mbed_official | 15:a81a8d6c1dfe | 249 | pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX] = NC; |
mbed_official | 15:a81a8d6c1dfe | 250 | |
mbed_official | 15:a81a8d6c1dfe | 251 | muxsetting = serial_find_mux_settings(obj); // getting mux setting from pins |
mbed_official | 15:a81a8d6c1dfe | 252 | sercom_index = pinmap_merge_sercom(tx, rx); // same variable sercom_index reused for optimization |
mbed_official | 15:a81a8d6c1dfe | 253 | if (sercom_index == (uint32_t)NC) { |
mbed_official | 15:a81a8d6c1dfe | 254 | /*expecting a valid value for sercom index*/ |
mbed_official | 15:a81a8d6c1dfe | 255 | return; |
mbed_official | 15:a81a8d6c1dfe | 256 | } |
mbed_official | 15:a81a8d6c1dfe | 257 | sercom_index &= 0x0F; |
mbed_official | 15:a81a8d6c1dfe | 258 | uart = pinmap_peripheral_sercom(NC, sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 259 | pUSART_S(obj) = (Sercom *)uart; |
mbed_official | 15:a81a8d6c1dfe | 260 | |
mbed_official | 15:a81a8d6c1dfe | 261 | /* Disable USART module */ |
mbed_official | 15:a81a8d6c1dfe | 262 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 263 | |
mbed_official | 15:a81a8d6c1dfe | 264 | pm_index = sercom_index + PM_APBCMASK_SERCOM0_Pos; |
mbed_official | 15:a81a8d6c1dfe | 265 | gclk_index = sercom_index + SERCOM0_GCLK_ID_CORE; |
mbed_official | 15:a81a8d6c1dfe | 266 | |
mbed_official | 15:a81a8d6c1dfe | 267 | if (_USART(obj).CTRLA.reg & SERCOM_USART_CTRLA_SWRST) { |
mbed_official | 15:a81a8d6c1dfe | 268 | return; /* The module is busy resetting itself */ |
mbed_official | 15:a81a8d6c1dfe | 269 | } |
mbed_official | 15:a81a8d6c1dfe | 270 | |
mbed_official | 15:a81a8d6c1dfe | 271 | if (_USART(obj).CTRLA.reg & SERCOM_USART_CTRLA_ENABLE) { |
mbed_official | 15:a81a8d6c1dfe | 272 | return; /* Check the module is enabled */ |
mbed_official | 15:a81a8d6c1dfe | 273 | } |
mbed_official | 15:a81a8d6c1dfe | 274 | |
mbed_official | 15:a81a8d6c1dfe | 275 | /* Turn on module in PM */ |
mbed_official | 15:a81a8d6c1dfe | 276 | system_apb_clock_set_mask(SYSTEM_CLOCK_APB_APBC, 1 << pm_index); |
mbed_official | 15:a81a8d6c1dfe | 277 | |
mbed_official | 15:a81a8d6c1dfe | 278 | /* Set up the GCLK for the module */ |
mbed_official | 15:a81a8d6c1dfe | 279 | gclk_chan_conf.source_generator = GCLK_GENERATOR_0; |
mbed_official | 15:a81a8d6c1dfe | 280 | system_gclk_chan_set_config(gclk_index, &gclk_chan_conf); |
mbed_official | 15:a81a8d6c1dfe | 281 | system_gclk_chan_enable(gclk_index); |
mbed_official | 15:a81a8d6c1dfe | 282 | sercom_set_gclk_generator(GCLK_GENERATOR_0, false); |
mbed_official | 15:a81a8d6c1dfe | 283 | |
mbed_official | 15:a81a8d6c1dfe | 284 | pSERIAL_S(obj)->mux_setting = muxsetting; |
mbed_official | 15:a81a8d6c1dfe | 285 | /* Set configuration according to the config struct */ |
mbed_official | 15:a81a8d6c1dfe | 286 | usart_set_config_default(obj); |
mbed_official | 15:a81a8d6c1dfe | 287 | |
mbed_official | 15:a81a8d6c1dfe | 288 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 289 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 15:a81a8d6c1dfe | 290 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 291 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 292 | |
mbed_official | 15:a81a8d6c1dfe | 293 | /* Configure the SERCOM pins according to the user configuration */ |
mbed_official | 15:a81a8d6c1dfe | 294 | for (uint8_t pad = 0; pad < 4; pad++) { |
mbed_official | 15:a81a8d6c1dfe | 295 | uint32_t current_pin = pSERIAL_S(obj)->pins[pad]; |
mbed_official | 15:a81a8d6c1dfe | 296 | if (current_pin != (uint32_t)NC) { |
mbed_official | 15:a81a8d6c1dfe | 297 | pin_conf.mux_position = pinmap_function_sercom(current_pin, sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 298 | if ((uint8_t)NC != pin_conf.mux_position) { |
mbed_official | 15:a81a8d6c1dfe | 299 | system_pinmux_pin_set_config(current_pin, &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 300 | } |
mbed_official | 15:a81a8d6c1dfe | 301 | } |
mbed_official | 15:a81a8d6c1dfe | 302 | } |
mbed_official | 15:a81a8d6c1dfe | 303 | |
mbed_official | 15:a81a8d6c1dfe | 304 | if (uart == STDIO_UART) { |
mbed_official | 15:a81a8d6c1dfe | 305 | stdio_uart_inited = 1; |
mbed_official | 15:a81a8d6c1dfe | 306 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
mbed_official | 15:a81a8d6c1dfe | 307 | } |
mbed_official | 15:a81a8d6c1dfe | 308 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 309 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 310 | |
mbed_official | 15:a81a8d6c1dfe | 311 | /* Enable USART module */ |
mbed_official | 15:a81a8d6c1dfe | 312 | enable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 313 | } |
mbed_official | 15:a81a8d6c1dfe | 314 | |
mbed_official | 15:a81a8d6c1dfe | 315 | void serial_free(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 316 | { |
mbed_official | 15:a81a8d6c1dfe | 317 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 318 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 319 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 320 | serial_irq_ids[serial_get_index(obj)] = 0; |
mbed_official | 15:a81a8d6c1dfe | 321 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 322 | |
mbed_official | 15:a81a8d6c1dfe | 323 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 15:a81a8d6c1dfe | 324 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; |
mbed_official | 15:a81a8d6c1dfe | 325 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 326 | pin_conf.mux_position = SYSTEM_PINMUX_GPIO; |
mbed_official | 15:a81a8d6c1dfe | 327 | /* Configure the SERCOM pins according to the user configuration */ |
mbed_official | 15:a81a8d6c1dfe | 328 | for (uint8_t pad = 0; pad < 4; pad++) { |
mbed_official | 15:a81a8d6c1dfe | 329 | uint32_t current_pin = pSERIAL_S(obj)->pins[pad]; |
mbed_official | 15:a81a8d6c1dfe | 330 | if (current_pin != (uint32_t)NC) { |
mbed_official | 15:a81a8d6c1dfe | 331 | system_pinmux_pin_set_config(current_pin, &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 332 | } |
mbed_official | 15:a81a8d6c1dfe | 333 | } |
mbed_official | 15:a81a8d6c1dfe | 334 | } |
mbed_official | 15:a81a8d6c1dfe | 335 | |
mbed_official | 15:a81a8d6c1dfe | 336 | void serial_baud(serial_t *obj, int baudrate) |
mbed_official | 15:a81a8d6c1dfe | 337 | { |
mbed_official | 15:a81a8d6c1dfe | 338 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 339 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 340 | MBED_ASSERT((baudrate == 110) || (baudrate == 150) || (baudrate == 300) || (baudrate == 1200) || |
mbed_official | 15:a81a8d6c1dfe | 341 | (baudrate == 2400) || (baudrate == 4800) || (baudrate == 9600) || (baudrate == 19200) || (baudrate == 38400) || |
mbed_official | 15:a81a8d6c1dfe | 342 | (baudrate == 57600) || (baudrate == 115200) || (baudrate == 230400) || (baudrate == 460800) || (baudrate == 921600) ); |
mbed_official | 15:a81a8d6c1dfe | 343 | |
mbed_official | 15:a81a8d6c1dfe | 344 | struct system_gclk_chan_config gclk_chan_conf; |
mbed_official | 15:a81a8d6c1dfe | 345 | uint32_t gclk_index; |
mbed_official | 15:a81a8d6c1dfe | 346 | uint16_t baud = 0; |
mbed_official | 15:a81a8d6c1dfe | 347 | uint32_t sercom_index = 0; |
mbed_official | 15:a81a8d6c1dfe | 348 | enum sercom_asynchronous_operation_mode mode = SERCOM_ASYNC_OPERATION_MODE_ARITHMETIC; |
mbed_official | 15:a81a8d6c1dfe | 349 | enum sercom_asynchronous_sample_num sample_num = SERCOM_ASYNC_SAMPLE_NUM_16; |
mbed_official | 15:a81a8d6c1dfe | 350 | |
mbed_official | 15:a81a8d6c1dfe | 351 | pSERIAL_S(obj)->baudrate = baudrate; |
mbed_official | 15:a81a8d6c1dfe | 352 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 353 | |
mbed_official | 15:a81a8d6c1dfe | 354 | sercom_index = _sercom_get_sercom_inst_index(pUSART_S(obj)); |
mbed_official | 15:a81a8d6c1dfe | 355 | gclk_index = sercom_index + SERCOM0_GCLK_ID_CORE; |
mbed_official | 15:a81a8d6c1dfe | 356 | |
mbed_official | 15:a81a8d6c1dfe | 357 | gclk_chan_conf.source_generator = GCLK_GENERATOR_0; |
mbed_official | 15:a81a8d6c1dfe | 358 | system_gclk_chan_set_config(gclk_index, &gclk_chan_conf); |
mbed_official | 15:a81a8d6c1dfe | 359 | system_gclk_chan_enable(gclk_index); |
mbed_official | 15:a81a8d6c1dfe | 360 | sercom_set_gclk_generator(GCLK_GENERATOR_0, false); |
mbed_official | 15:a81a8d6c1dfe | 361 | |
mbed_official | 15:a81a8d6c1dfe | 362 | /* Get baud value from mode and clock */ |
mbed_official | 15:a81a8d6c1dfe | 363 | _sercom_get_async_baud_val(pSERIAL_S(obj)->baudrate, system_gclk_chan_get_hz(gclk_index), &baud, mode, sample_num); |
mbed_official | 15:a81a8d6c1dfe | 364 | |
mbed_official | 15:a81a8d6c1dfe | 365 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 366 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 367 | |
mbed_official | 15:a81a8d6c1dfe | 368 | /*Set baud val */ |
mbed_official | 15:a81a8d6c1dfe | 369 | _USART(obj).BAUD.reg = baud; |
mbed_official | 15:a81a8d6c1dfe | 370 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 371 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 372 | |
mbed_official | 15:a81a8d6c1dfe | 373 | enable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 374 | } |
mbed_official | 15:a81a8d6c1dfe | 375 | |
mbed_official | 15:a81a8d6c1dfe | 376 | void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) |
mbed_official | 15:a81a8d6c1dfe | 377 | { |
mbed_official | 15:a81a8d6c1dfe | 378 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 379 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 380 | MBED_ASSERT((stop_bits == 1) || (stop_bits == 2)); |
mbed_official | 15:a81a8d6c1dfe | 381 | MBED_ASSERT((parity == ParityNone) || (parity == ParityOdd) || (parity == ParityEven)); |
mbed_official | 15:a81a8d6c1dfe | 382 | MBED_ASSERT((data_bits == 5) || (data_bits == 6) || (data_bits == 7) || (data_bits == 8) /*|| (data_bits == 9)*/); |
mbed_official | 15:a81a8d6c1dfe | 383 | |
mbed_official | 15:a81a8d6c1dfe | 384 | /* Cache new register values to minimize the number of register writes */ |
mbed_official | 15:a81a8d6c1dfe | 385 | uint32_t ctrla = 0; |
mbed_official | 15:a81a8d6c1dfe | 386 | uint32_t ctrlb = 0; |
mbed_official | 15:a81a8d6c1dfe | 387 | |
mbed_official | 15:a81a8d6c1dfe | 388 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 389 | |
mbed_official | 15:a81a8d6c1dfe | 390 | ctrla = _USART(obj).CTRLA.reg; |
mbed_official | 15:a81a8d6c1dfe | 391 | ctrlb = _USART(obj).CTRLB.reg; |
mbed_official | 15:a81a8d6c1dfe | 392 | |
mbed_official | 15:a81a8d6c1dfe | 393 | ctrla &= ~(SERCOM_USART_CTRLA_FORM_Msk); |
mbed_official | 15:a81a8d6c1dfe | 394 | ctrlb &= ~(SERCOM_USART_CTRLB_CHSIZE_Msk); |
mbed_official | 15:a81a8d6c1dfe | 395 | ctrlb &= ~(SERCOM_USART_CTRLB_SBMODE); |
mbed_official | 15:a81a8d6c1dfe | 396 | ctrlb &= ~(SERCOM_USART_CTRLB_PMODE); |
mbed_official | 15:a81a8d6c1dfe | 397 | |
mbed_official | 15:a81a8d6c1dfe | 398 | switch (stop_bits) { |
mbed_official | 15:a81a8d6c1dfe | 399 | case 1: |
mbed_official | 15:a81a8d6c1dfe | 400 | pSERIAL_S(obj)->stopbits = USART_STOPBITS_1; |
mbed_official | 15:a81a8d6c1dfe | 401 | break; |
mbed_official | 15:a81a8d6c1dfe | 402 | case 2: |
mbed_official | 15:a81a8d6c1dfe | 403 | pSERIAL_S(obj)->stopbits = USART_STOPBITS_2; |
mbed_official | 15:a81a8d6c1dfe | 404 | break; |
mbed_official | 15:a81a8d6c1dfe | 405 | default: |
mbed_official | 15:a81a8d6c1dfe | 406 | pSERIAL_S(obj)->stopbits = USART_STOPBITS_1; |
mbed_official | 15:a81a8d6c1dfe | 407 | } |
mbed_official | 15:a81a8d6c1dfe | 408 | |
mbed_official | 15:a81a8d6c1dfe | 409 | switch (parity) { |
mbed_official | 15:a81a8d6c1dfe | 410 | case ParityNone: |
mbed_official | 15:a81a8d6c1dfe | 411 | pSERIAL_S(obj)->parity = USART_PARITY_NONE; |
mbed_official | 15:a81a8d6c1dfe | 412 | break; |
mbed_official | 15:a81a8d6c1dfe | 413 | case ParityOdd: |
mbed_official | 15:a81a8d6c1dfe | 414 | pSERIAL_S(obj)->parity = USART_PARITY_ODD; |
mbed_official | 15:a81a8d6c1dfe | 415 | break; |
mbed_official | 15:a81a8d6c1dfe | 416 | case ParityEven: |
mbed_official | 15:a81a8d6c1dfe | 417 | pSERIAL_S(obj)->parity = USART_PARITY_EVEN; |
mbed_official | 15:a81a8d6c1dfe | 418 | break; |
mbed_official | 15:a81a8d6c1dfe | 419 | default: |
mbed_official | 15:a81a8d6c1dfe | 420 | pSERIAL_S(obj)->parity = USART_PARITY_NONE; |
mbed_official | 15:a81a8d6c1dfe | 421 | } |
mbed_official | 15:a81a8d6c1dfe | 422 | |
mbed_official | 15:a81a8d6c1dfe | 423 | switch (data_bits) { |
mbed_official | 15:a81a8d6c1dfe | 424 | case 5: |
mbed_official | 15:a81a8d6c1dfe | 425 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_5BIT; |
mbed_official | 15:a81a8d6c1dfe | 426 | break; |
mbed_official | 15:a81a8d6c1dfe | 427 | case 6: |
mbed_official | 15:a81a8d6c1dfe | 428 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_6BIT; |
mbed_official | 15:a81a8d6c1dfe | 429 | break; |
mbed_official | 15:a81a8d6c1dfe | 430 | case 7: |
mbed_official | 15:a81a8d6c1dfe | 431 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_7BIT; |
mbed_official | 15:a81a8d6c1dfe | 432 | break; |
mbed_official | 15:a81a8d6c1dfe | 433 | case 8: |
mbed_official | 15:a81a8d6c1dfe | 434 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_8BIT; |
mbed_official | 15:a81a8d6c1dfe | 435 | break; // 9 bit transfer not required in mbed |
mbed_official | 15:a81a8d6c1dfe | 436 | default: |
mbed_official | 15:a81a8d6c1dfe | 437 | pSERIAL_S(obj)->character_size = USART_CHARACTER_SIZE_8BIT; |
mbed_official | 15:a81a8d6c1dfe | 438 | } |
mbed_official | 15:a81a8d6c1dfe | 439 | |
mbed_official | 15:a81a8d6c1dfe | 440 | |
mbed_official | 15:a81a8d6c1dfe | 441 | /* Set stopbits, character size and enable transceivers */ |
mbed_official | 15:a81a8d6c1dfe | 442 | ctrlb |= (pSERIAL_S(obj)->stopbits | pSERIAL_S(obj)->character_size); |
mbed_official | 15:a81a8d6c1dfe | 443 | |
mbed_official | 15:a81a8d6c1dfe | 444 | /* Check parity mode bits */ |
mbed_official | 15:a81a8d6c1dfe | 445 | if (pSERIAL_S(obj)->parity != USART_PARITY_NONE) { |
mbed_official | 15:a81a8d6c1dfe | 446 | ctrla |= SERCOM_USART_CTRLA_FORM(1); |
mbed_official | 15:a81a8d6c1dfe | 447 | ctrlb |= pSERIAL_S(obj)->parity; |
mbed_official | 15:a81a8d6c1dfe | 448 | } else { |
mbed_official | 15:a81a8d6c1dfe | 449 | ctrla |= SERCOM_USART_CTRLA_FORM(0); |
mbed_official | 15:a81a8d6c1dfe | 450 | } |
mbed_official | 15:a81a8d6c1dfe | 451 | |
mbed_official | 15:a81a8d6c1dfe | 452 | /* Write configuration to CTRLB */ |
mbed_official | 15:a81a8d6c1dfe | 453 | _USART(obj).CTRLB.reg = ctrlb; |
mbed_official | 15:a81a8d6c1dfe | 454 | |
mbed_official | 15:a81a8d6c1dfe | 455 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 456 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 457 | |
mbed_official | 15:a81a8d6c1dfe | 458 | /* Write configuration to CTRLA */ |
mbed_official | 15:a81a8d6c1dfe | 459 | _USART(obj).CTRLA.reg = ctrla; |
mbed_official | 15:a81a8d6c1dfe | 460 | |
mbed_official | 15:a81a8d6c1dfe | 461 | /* Wait until synchronization is complete */ |
mbed_official | 15:a81a8d6c1dfe | 462 | usart_syncing(obj); |
mbed_official | 15:a81a8d6c1dfe | 463 | |
mbed_official | 15:a81a8d6c1dfe | 464 | enable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 465 | } |
mbed_official | 15:a81a8d6c1dfe | 466 | |
mbed_official | 15:a81a8d6c1dfe | 467 | #ifdef DEVICE_SERIAL_FC |
mbed_official | 15:a81a8d6c1dfe | 468 | |
mbed_official | 15:a81a8d6c1dfe | 469 | void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow) |
mbed_official | 15:a81a8d6c1dfe | 470 | { |
mbed_official | 15:a81a8d6c1dfe | 471 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 472 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 473 | uint32_t muxsetting = 0; |
mbed_official | 15:a81a8d6c1dfe | 474 | uint32_t sercom_index = 0; |
mbed_official | 15:a81a8d6c1dfe | 475 | |
mbed_official | 15:a81a8d6c1dfe | 476 | pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX] = rxflow; |
mbed_official | 15:a81a8d6c1dfe | 477 | pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX] = txflow; |
mbed_official | 15:a81a8d6c1dfe | 478 | muxsetting = serial_find_mux_settings(obj); // getting mux setting from pins |
mbed_official | 15:a81a8d6c1dfe | 479 | sercom_index = pinmap_merge_sercom(pSERIAL_S(obj)->pins[USART_TX_INDEX], pSERIAL_S(obj)->pins[USART_RX_INDEX]); // same variable sercom_index reused for optimization |
mbed_official | 15:a81a8d6c1dfe | 480 | if (sercom_index == (uint32_t)NC) { |
mbed_official | 15:a81a8d6c1dfe | 481 | /*expecting a valid value for sercom index*/ |
mbed_official | 15:a81a8d6c1dfe | 482 | return; |
mbed_official | 15:a81a8d6c1dfe | 483 | } |
mbed_official | 15:a81a8d6c1dfe | 484 | |
mbed_official | 15:a81a8d6c1dfe | 485 | disable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 486 | |
mbed_official | 15:a81a8d6c1dfe | 487 | /* Set configuration according to the config struct */ |
mbed_official | 15:a81a8d6c1dfe | 488 | pSERIAL_S(obj)->mux_setting = muxsetting; // mux setting to be changed for configuring hardware control |
mbed_official | 15:a81a8d6c1dfe | 489 | usart_set_config_default(obj); |
mbed_official | 15:a81a8d6c1dfe | 490 | |
mbed_official | 15:a81a8d6c1dfe | 491 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 492 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 15:a81a8d6c1dfe | 493 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 494 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 495 | |
mbed_official | 15:a81a8d6c1dfe | 496 | for (uint8_t pad = 0; pad < 2; pad++) { // setting for rx and tx |
mbed_official | 15:a81a8d6c1dfe | 497 | uint32_t current_pin = pSERIAL_S(obj)->pins[pad]; |
mbed_official | 15:a81a8d6c1dfe | 498 | if (current_pin != (uint32_t)NC) { |
mbed_official | 15:a81a8d6c1dfe | 499 | pin_conf.mux_position = pinmap_function_sercom(current_pin, sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 500 | if ((uint8_t)NC != pin_conf.mux_position) { |
mbed_official | 15:a81a8d6c1dfe | 501 | system_pinmux_pin_set_config(current_pin, &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 502 | } |
mbed_official | 15:a81a8d6c1dfe | 503 | } |
mbed_official | 15:a81a8d6c1dfe | 504 | } |
mbed_official | 15:a81a8d6c1dfe | 505 | if((FlowControlRTS == type) || (FlowControlRTSCTS== type)) { |
mbed_official | 15:a81a8d6c1dfe | 506 | if (pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX] != NC) { |
mbed_official | 15:a81a8d6c1dfe | 507 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT; // setting for rxflow |
mbed_official | 15:a81a8d6c1dfe | 508 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; |
mbed_official | 15:a81a8d6c1dfe | 509 | pin_conf.mux_position = pinmap_function_sercom(pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX] , sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 510 | if ((uint8_t)NC != pin_conf.mux_position) { |
mbed_official | 15:a81a8d6c1dfe | 511 | system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_RXFLOW_INDEX], &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 512 | } |
mbed_official | 15:a81a8d6c1dfe | 513 | } |
mbed_official | 15:a81a8d6c1dfe | 514 | } |
mbed_official | 15:a81a8d6c1dfe | 515 | if((FlowControlCTS == type) || (FlowControlRTSCTS== type)) { |
mbed_official | 15:a81a8d6c1dfe | 516 | if (pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX] != NC) { |
mbed_official | 15:a81a8d6c1dfe | 517 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; // setting for txflow |
mbed_official | 15:a81a8d6c1dfe | 518 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_UP; |
mbed_official | 15:a81a8d6c1dfe | 519 | pin_conf.mux_position = pinmap_function_sercom(pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX] , sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 520 | if ((uint8_t)NC != pin_conf.mux_position) { |
mbed_official | 15:a81a8d6c1dfe | 521 | system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_TXFLOW_INDEX], &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 522 | } |
mbed_official | 15:a81a8d6c1dfe | 523 | } |
mbed_official | 15:a81a8d6c1dfe | 524 | } |
mbed_official | 15:a81a8d6c1dfe | 525 | enable_usart(obj); |
mbed_official | 15:a81a8d6c1dfe | 526 | } |
mbed_official | 15:a81a8d6c1dfe | 527 | |
mbed_official | 15:a81a8d6c1dfe | 528 | #endif //DEVICE_SERIAL_FC |
mbed_official | 15:a81a8d6c1dfe | 529 | |
mbed_official | 15:a81a8d6c1dfe | 530 | void serial_break_set(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 531 | { |
mbed_official | 15:a81a8d6c1dfe | 532 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 533 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 534 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 535 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_OUTPUT; |
mbed_official | 15:a81a8d6c1dfe | 536 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 537 | pin_conf.mux_position = SYSTEM_PINMUX_GPIO; |
mbed_official | 15:a81a8d6c1dfe | 538 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 539 | |
mbed_official | 15:a81a8d6c1dfe | 540 | if (pSERIAL_S(obj)->pins[USART_TX_INDEX] != NC) { |
mbed_official | 15:a81a8d6c1dfe | 541 | system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_TX_INDEX], &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 542 | } |
mbed_official | 15:a81a8d6c1dfe | 543 | } |
mbed_official | 15:a81a8d6c1dfe | 544 | |
mbed_official | 15:a81a8d6c1dfe | 545 | void serial_break_clear(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 546 | { |
mbed_official | 15:a81a8d6c1dfe | 547 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 548 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 549 | uint32_t sercom_index = pinmap_merge_sercom(pSERIAL_S(obj)->pins[USART_TX_INDEX], pSERIAL_S(obj)->pins[USART_RX_INDEX]); |
mbed_official | 15:a81a8d6c1dfe | 550 | |
mbed_official | 15:a81a8d6c1dfe | 551 | struct system_pinmux_config pin_conf; |
mbed_official | 15:a81a8d6c1dfe | 552 | pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT; |
mbed_official | 15:a81a8d6c1dfe | 553 | pin_conf.input_pull = SYSTEM_PINMUX_PIN_PULL_NONE; |
mbed_official | 15:a81a8d6c1dfe | 554 | pin_conf.powersave = false; |
mbed_official | 15:a81a8d6c1dfe | 555 | |
mbed_official | 15:a81a8d6c1dfe | 556 | if (pSERIAL_S(obj)->pins[USART_TX_INDEX] != NC) { |
mbed_official | 15:a81a8d6c1dfe | 557 | pin_conf.mux_position = pinmap_function_sercom(pSERIAL_S(obj)->pins[USART_TX_INDEX], sercom_index); |
mbed_official | 15:a81a8d6c1dfe | 558 | if ((uint8_t)NC != pin_conf.mux_position) { |
mbed_official | 15:a81a8d6c1dfe | 559 | system_pinmux_pin_set_config(pSERIAL_S(obj)->pins[USART_TX_INDEX], &pin_conf); |
mbed_official | 15:a81a8d6c1dfe | 560 | } |
mbed_official | 15:a81a8d6c1dfe | 561 | } |
mbed_official | 15:a81a8d6c1dfe | 562 | } |
mbed_official | 15:a81a8d6c1dfe | 563 | |
mbed_official | 15:a81a8d6c1dfe | 564 | void serial_pinout_tx(PinName tx) |
mbed_official | 15:a81a8d6c1dfe | 565 | { |
mbed_official | 15:a81a8d6c1dfe | 566 | pinmap_pinout(tx, PinMap_SERCOM_PAD); |
mbed_official | 15:a81a8d6c1dfe | 567 | } |
mbed_official | 15:a81a8d6c1dfe | 568 | |
mbed_official | 15:a81a8d6c1dfe | 569 | /****************************************************************************** |
mbed_official | 15:a81a8d6c1dfe | 570 | * INTERRUPTS HANDLING |
mbed_official | 15:a81a8d6c1dfe | 571 | ******************************************************************************/ |
mbed_official | 15:a81a8d6c1dfe | 572 | inline uint8_t serial_get_index(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 573 | { |
mbed_official | 15:a81a8d6c1dfe | 574 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 575 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 576 | switch ((int)pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 577 | case UART_0: |
mbed_official | 15:a81a8d6c1dfe | 578 | return 0; |
mbed_official | 15:a81a8d6c1dfe | 579 | case UART_1: |
mbed_official | 15:a81a8d6c1dfe | 580 | return 1; |
mbed_official | 15:a81a8d6c1dfe | 581 | case UART_2: |
mbed_official | 15:a81a8d6c1dfe | 582 | return 2; |
mbed_official | 15:a81a8d6c1dfe | 583 | case UART_3: |
mbed_official | 15:a81a8d6c1dfe | 584 | return 3; |
mbed_official | 15:a81a8d6c1dfe | 585 | case UART_4: |
mbed_official | 15:a81a8d6c1dfe | 586 | return 4; |
mbed_official | 15:a81a8d6c1dfe | 587 | case UART_5: |
mbed_official | 15:a81a8d6c1dfe | 588 | return 5; |
mbed_official | 15:a81a8d6c1dfe | 589 | } |
mbed_official | 15:a81a8d6c1dfe | 590 | return 0; |
mbed_official | 15:a81a8d6c1dfe | 591 | } |
mbed_official | 15:a81a8d6c1dfe | 592 | |
mbed_official | 15:a81a8d6c1dfe | 593 | static inline void uart_irq(SercomUsart *const usart, uint32_t index) |
mbed_official | 15:a81a8d6c1dfe | 594 | { |
mbed_official | 15:a81a8d6c1dfe | 595 | MBED_ASSERT(usart != (void*)0); |
mbed_official | 15:a81a8d6c1dfe | 596 | uint16_t interrupt_status; |
mbed_official | 15:a81a8d6c1dfe | 597 | interrupt_status = usart->INTFLAG.reg; |
mbed_official | 15:a81a8d6c1dfe | 598 | interrupt_status &= usart->INTENSET.reg; |
mbed_official | 15:a81a8d6c1dfe | 599 | |
mbed_official | 15:a81a8d6c1dfe | 600 | if (serial_irq_ids[index] != 0) { |
mbed_official | 15:a81a8d6c1dfe | 601 | if (interrupt_status & SERCOM_USART_INTFLAG_TXC) { // for transmit complete |
mbed_official | 15:a81a8d6c1dfe | 602 | usart->INTFLAG.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 603 | if (irq_handler) { |
mbed_official | 15:a81a8d6c1dfe | 604 | irq_handler(serial_irq_ids[index], TxIrq); |
mbed_official | 15:a81a8d6c1dfe | 605 | } |
mbed_official | 15:a81a8d6c1dfe | 606 | } |
mbed_official | 15:a81a8d6c1dfe | 607 | if (interrupt_status & SERCOM_USART_INTFLAG_RXC) { // for receive complete |
mbed_official | 15:a81a8d6c1dfe | 608 | usart->INTFLAG.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 609 | if (irq_handler) { |
mbed_official | 15:a81a8d6c1dfe | 610 | irq_handler(serial_irq_ids[index], RxIrq); |
mbed_official | 15:a81a8d6c1dfe | 611 | } |
mbed_official | 15:a81a8d6c1dfe | 612 | } |
mbed_official | 15:a81a8d6c1dfe | 613 | } |
mbed_official | 15:a81a8d6c1dfe | 614 | } |
mbed_official | 15:a81a8d6c1dfe | 615 | |
mbed_official | 15:a81a8d6c1dfe | 616 | void uart0_irq() |
mbed_official | 15:a81a8d6c1dfe | 617 | { |
mbed_official | 15:a81a8d6c1dfe | 618 | uart_irq((SercomUsart *)UART_0, 0); |
mbed_official | 15:a81a8d6c1dfe | 619 | } |
mbed_official | 15:a81a8d6c1dfe | 620 | |
mbed_official | 15:a81a8d6c1dfe | 621 | void uart1_irq() |
mbed_official | 15:a81a8d6c1dfe | 622 | { |
mbed_official | 15:a81a8d6c1dfe | 623 | uart_irq((SercomUsart *)UART_1, 1); |
mbed_official | 15:a81a8d6c1dfe | 624 | } |
mbed_official | 15:a81a8d6c1dfe | 625 | |
mbed_official | 15:a81a8d6c1dfe | 626 | void uart2_irq() |
mbed_official | 15:a81a8d6c1dfe | 627 | { |
mbed_official | 15:a81a8d6c1dfe | 628 | uart_irq((SercomUsart *)UART_2, 2); |
mbed_official | 15:a81a8d6c1dfe | 629 | } |
mbed_official | 15:a81a8d6c1dfe | 630 | |
mbed_official | 15:a81a8d6c1dfe | 631 | void uart3_irq() |
mbed_official | 15:a81a8d6c1dfe | 632 | { |
mbed_official | 15:a81a8d6c1dfe | 633 | uart_irq((SercomUsart *)UART_3, 3); |
mbed_official | 15:a81a8d6c1dfe | 634 | } |
mbed_official | 15:a81a8d6c1dfe | 635 | |
mbed_official | 15:a81a8d6c1dfe | 636 | void uart4_irq() |
mbed_official | 15:a81a8d6c1dfe | 637 | { |
mbed_official | 15:a81a8d6c1dfe | 638 | uart_irq((SercomUsart *)UART_4, 4); |
mbed_official | 15:a81a8d6c1dfe | 639 | } |
mbed_official | 15:a81a8d6c1dfe | 640 | |
mbed_official | 15:a81a8d6c1dfe | 641 | void uart5_irq() |
mbed_official | 15:a81a8d6c1dfe | 642 | { |
mbed_official | 15:a81a8d6c1dfe | 643 | uart_irq((SercomUsart *)UART_5, 5); |
mbed_official | 15:a81a8d6c1dfe | 644 | } |
mbed_official | 15:a81a8d6c1dfe | 645 | |
mbed_official | 15:a81a8d6c1dfe | 646 | uint32_t get_serial_vector (serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 647 | { |
mbed_official | 15:a81a8d6c1dfe | 648 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 649 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 650 | uint32_t vector = 0; |
mbed_official | 15:a81a8d6c1dfe | 651 | switch ((int)pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 652 | case UART_0: |
mbed_official | 15:a81a8d6c1dfe | 653 | vector = (uint32_t)uart0_irq; |
mbed_official | 15:a81a8d6c1dfe | 654 | break; |
mbed_official | 15:a81a8d6c1dfe | 655 | case UART_1: |
mbed_official | 15:a81a8d6c1dfe | 656 | vector = (uint32_t)uart1_irq; |
mbed_official | 15:a81a8d6c1dfe | 657 | break; |
mbed_official | 15:a81a8d6c1dfe | 658 | case UART_2: |
mbed_official | 15:a81a8d6c1dfe | 659 | vector = (uint32_t)uart2_irq; |
mbed_official | 15:a81a8d6c1dfe | 660 | break; |
mbed_official | 15:a81a8d6c1dfe | 661 | case UART_3: |
mbed_official | 15:a81a8d6c1dfe | 662 | vector = (uint32_t)uart3_irq; |
mbed_official | 15:a81a8d6c1dfe | 663 | break; |
mbed_official | 15:a81a8d6c1dfe | 664 | case UART_4: |
mbed_official | 15:a81a8d6c1dfe | 665 | vector = (uint32_t)uart4_irq; |
mbed_official | 15:a81a8d6c1dfe | 666 | break; |
mbed_official | 15:a81a8d6c1dfe | 667 | case UART_5: |
mbed_official | 15:a81a8d6c1dfe | 668 | vector = (uint32_t)uart5_irq; |
mbed_official | 15:a81a8d6c1dfe | 669 | break; |
mbed_official | 15:a81a8d6c1dfe | 670 | } |
mbed_official | 15:a81a8d6c1dfe | 671 | return vector; |
mbed_official | 15:a81a8d6c1dfe | 672 | } |
mbed_official | 15:a81a8d6c1dfe | 673 | |
mbed_official | 15:a81a8d6c1dfe | 674 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) |
mbed_official | 15:a81a8d6c1dfe | 675 | { |
mbed_official | 15:a81a8d6c1dfe | 676 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 677 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 678 | irq_handler = handler; |
mbed_official | 15:a81a8d6c1dfe | 679 | serial_irq_ids[serial_get_index(obj)] = id; |
mbed_official | 15:a81a8d6c1dfe | 680 | } |
mbed_official | 15:a81a8d6c1dfe | 681 | |
mbed_official | 15:a81a8d6c1dfe | 682 | IRQn_Type get_serial_irq_num (serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 683 | { |
mbed_official | 15:a81a8d6c1dfe | 684 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 685 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 686 | switch ((int)pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 687 | case UART_0: |
mbed_official | 15:a81a8d6c1dfe | 688 | return SERCOM0_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 689 | case UART_1: |
mbed_official | 15:a81a8d6c1dfe | 690 | return SERCOM1_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 691 | case UART_2: |
mbed_official | 15:a81a8d6c1dfe | 692 | return SERCOM2_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 693 | case UART_3: |
mbed_official | 15:a81a8d6c1dfe | 694 | return SERCOM3_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 695 | case UART_4: |
mbed_official | 15:a81a8d6c1dfe | 696 | return SERCOM4_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 697 | case UART_5: |
mbed_official | 15:a81a8d6c1dfe | 698 | return SERCOM5_IRQn; |
mbed_official | 15:a81a8d6c1dfe | 699 | default: |
mbed_official | 15:a81a8d6c1dfe | 700 | MBED_ASSERT(0); |
mbed_official | 15:a81a8d6c1dfe | 701 | } |
mbed_official | 15:a81a8d6c1dfe | 702 | return SERCOM0_IRQn; // to avoid warning |
mbed_official | 15:a81a8d6c1dfe | 703 | } |
mbed_official | 15:a81a8d6c1dfe | 704 | |
mbed_official | 15:a81a8d6c1dfe | 705 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) |
mbed_official | 15:a81a8d6c1dfe | 706 | { |
mbed_official | 15:a81a8d6c1dfe | 707 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 708 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 709 | IRQn_Type irq_n = (IRQn_Type)0; |
mbed_official | 15:a81a8d6c1dfe | 710 | uint32_t vector = 0; |
mbed_official | 15:a81a8d6c1dfe | 711 | |
mbed_official | 15:a81a8d6c1dfe | 712 | vector = get_serial_vector(obj); |
mbed_official | 15:a81a8d6c1dfe | 713 | irq_n = get_serial_irq_num(obj); |
mbed_official | 15:a81a8d6c1dfe | 714 | |
mbed_official | 15:a81a8d6c1dfe | 715 | if (enable) { |
mbed_official | 15:a81a8d6c1dfe | 716 | switch (irq) { |
mbed_official | 15:a81a8d6c1dfe | 717 | case RxIrq: |
mbed_official | 15:a81a8d6c1dfe | 718 | _USART(obj).INTENSET.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 719 | break; |
mbed_official | 15:a81a8d6c1dfe | 720 | case TxIrq: |
mbed_official | 15:a81a8d6c1dfe | 721 | _USART(obj).INTENSET.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 722 | break; |
mbed_official | 15:a81a8d6c1dfe | 723 | } |
mbed_official | 15:a81a8d6c1dfe | 724 | NVIC_SetVector(irq_n, vector); |
mbed_official | 15:a81a8d6c1dfe | 725 | NVIC_EnableIRQ(irq_n); |
mbed_official | 15:a81a8d6c1dfe | 726 | |
mbed_official | 15:a81a8d6c1dfe | 727 | } else { |
mbed_official | 15:a81a8d6c1dfe | 728 | switch (irq) { |
mbed_official | 15:a81a8d6c1dfe | 729 | case RxIrq: |
mbed_official | 15:a81a8d6c1dfe | 730 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 731 | break; |
mbed_official | 15:a81a8d6c1dfe | 732 | case TxIrq: |
mbed_official | 15:a81a8d6c1dfe | 733 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 734 | break; |
mbed_official | 15:a81a8d6c1dfe | 735 | } |
mbed_official | 15:a81a8d6c1dfe | 736 | NVIC_DisableIRQ(irq_n); |
mbed_official | 15:a81a8d6c1dfe | 737 | } |
mbed_official | 15:a81a8d6c1dfe | 738 | } |
mbed_official | 15:a81a8d6c1dfe | 739 | |
mbed_official | 15:a81a8d6c1dfe | 740 | /****************************************************************************** |
mbed_official | 15:a81a8d6c1dfe | 741 | * READ/WRITE |
mbed_official | 15:a81a8d6c1dfe | 742 | ******************************************************************************/ |
mbed_official | 15:a81a8d6c1dfe | 743 | int serial_getc(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 744 | { |
mbed_official | 15:a81a8d6c1dfe | 745 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 746 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 747 | while (!serial_readable(obj)); |
mbed_official | 15:a81a8d6c1dfe | 748 | return _USART(obj).DATA.reg ; |
mbed_official | 15:a81a8d6c1dfe | 749 | } |
mbed_official | 15:a81a8d6c1dfe | 750 | |
mbed_official | 15:a81a8d6c1dfe | 751 | void serial_putc(serial_t *obj, int c) |
mbed_official | 15:a81a8d6c1dfe | 752 | { |
mbed_official | 15:a81a8d6c1dfe | 753 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 754 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 755 | uint16_t q = (c & SERCOM_USART_DATA_MASK); |
mbed_official | 15:a81a8d6c1dfe | 756 | while (!serial_writable(obj)); |
mbed_official | 15:a81a8d6c1dfe | 757 | _USART(obj).DATA.reg = q; |
mbed_official | 15:a81a8d6c1dfe | 758 | while (!(_USART(obj).INTFLAG.reg & SERCOM_USART_INTFLAG_TXC)); // wait till data is sent |
mbed_official | 15:a81a8d6c1dfe | 759 | } |
mbed_official | 15:a81a8d6c1dfe | 760 | |
mbed_official | 15:a81a8d6c1dfe | 761 | int serial_readable(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 762 | { |
mbed_official | 15:a81a8d6c1dfe | 763 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 764 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 765 | uint32_t status = 1; |
mbed_official | 15:a81a8d6c1dfe | 766 | if (!(_USART(obj).INTFLAG.reg & SERCOM_USART_INTFLAG_RXC)) { |
mbed_official | 15:a81a8d6c1dfe | 767 | status = 0; |
mbed_official | 15:a81a8d6c1dfe | 768 | } else { |
mbed_official | 15:a81a8d6c1dfe | 769 | status = 1; |
mbed_official | 15:a81a8d6c1dfe | 770 | } |
mbed_official | 15:a81a8d6c1dfe | 771 | return status; |
mbed_official | 15:a81a8d6c1dfe | 772 | } |
mbed_official | 15:a81a8d6c1dfe | 773 | |
mbed_official | 15:a81a8d6c1dfe | 774 | int serial_writable(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 775 | { |
mbed_official | 15:a81a8d6c1dfe | 776 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 777 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 778 | uint32_t status = 1; |
mbed_official | 15:a81a8d6c1dfe | 779 | if (!(_USART(obj).INTFLAG.reg & SERCOM_USART_INTFLAG_DRE)) { |
mbed_official | 15:a81a8d6c1dfe | 780 | status = 0; |
mbed_official | 15:a81a8d6c1dfe | 781 | } else { |
mbed_official | 15:a81a8d6c1dfe | 782 | status = 1; |
mbed_official | 15:a81a8d6c1dfe | 783 | } |
mbed_official | 15:a81a8d6c1dfe | 784 | return status; |
mbed_official | 15:a81a8d6c1dfe | 785 | } |
mbed_official | 15:a81a8d6c1dfe | 786 | |
mbed_official | 15:a81a8d6c1dfe | 787 | /************************************************************************************ |
mbed_official | 15:a81a8d6c1dfe | 788 | * ASYNCHRONOUS HAL * |
mbed_official | 15:a81a8d6c1dfe | 789 | ************************************************************************************/ |
mbed_official | 15:a81a8d6c1dfe | 790 | |
mbed_official | 15:a81a8d6c1dfe | 791 | #if DEVICE_SERIAL_ASYNCH |
mbed_official | 15:a81a8d6c1dfe | 792 | |
mbed_official | 15:a81a8d6c1dfe | 793 | /************************************ |
mbed_official | 15:a81a8d6c1dfe | 794 | * HELPER FUNCTIONS * |
mbed_official | 15:a81a8d6c1dfe | 795 | ***********************************/ |
mbed_official | 15:a81a8d6c1dfe | 796 | void serial_tx_enable_event(serial_t *obj, int event, uint8_t enable) |
mbed_official | 15:a81a8d6c1dfe | 797 | { |
mbed_official | 15:a81a8d6c1dfe | 798 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 799 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 800 | if(enable) { |
mbed_official | 15:a81a8d6c1dfe | 801 | pSERIAL_S(obj)->events |= event; |
mbed_official | 15:a81a8d6c1dfe | 802 | } else { |
mbed_official | 15:a81a8d6c1dfe | 803 | pSERIAL_S(obj)->events &= ~ event; |
mbed_official | 15:a81a8d6c1dfe | 804 | } |
mbed_official | 15:a81a8d6c1dfe | 805 | } |
mbed_official | 15:a81a8d6c1dfe | 806 | |
mbed_official | 15:a81a8d6c1dfe | 807 | void serial_rx_enable_event(serial_t *obj, int event, uint8_t enable) |
mbed_official | 15:a81a8d6c1dfe | 808 | { |
mbed_official | 15:a81a8d6c1dfe | 809 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 810 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 811 | if(enable) { |
mbed_official | 15:a81a8d6c1dfe | 812 | pSERIAL_S(obj)->events |= event; |
mbed_official | 15:a81a8d6c1dfe | 813 | } else { |
mbed_official | 15:a81a8d6c1dfe | 814 | pSERIAL_S(obj)->events &= ~ event; |
mbed_official | 15:a81a8d6c1dfe | 815 | } |
mbed_official | 15:a81a8d6c1dfe | 816 | } |
mbed_official | 15:a81a8d6c1dfe | 817 | |
mbed_official | 15:a81a8d6c1dfe | 818 | void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width) |
mbed_official | 15:a81a8d6c1dfe | 819 | { |
mbed_official | 15:a81a8d6c1dfe | 820 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 821 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 822 | MBED_ASSERT(tx != (void*)0); |
mbed_official | 15:a81a8d6c1dfe | 823 | // We only support byte buffers for now |
mbed_official | 15:a81a8d6c1dfe | 824 | MBED_ASSERT(width == 8); |
mbed_official | 15:a81a8d6c1dfe | 825 | |
mbed_official | 15:a81a8d6c1dfe | 826 | if(serial_tx_active(obj)) return; |
mbed_official | 15:a81a8d6c1dfe | 827 | |
mbed_official | 15:a81a8d6c1dfe | 828 | obj->tx_buff.buffer = tx; |
mbed_official | 15:a81a8d6c1dfe | 829 | obj->tx_buff.length = tx_length; |
mbed_official | 15:a81a8d6c1dfe | 830 | obj->tx_buff.pos = 0; |
mbed_official | 15:a81a8d6c1dfe | 831 | |
mbed_official | 15:a81a8d6c1dfe | 832 | return; |
mbed_official | 15:a81a8d6c1dfe | 833 | } |
mbed_official | 15:a81a8d6c1dfe | 834 | |
mbed_official | 15:a81a8d6c1dfe | 835 | void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width) |
mbed_official | 15:a81a8d6c1dfe | 836 | { |
mbed_official | 15:a81a8d6c1dfe | 837 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 838 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 839 | MBED_ASSERT(rx != (void*)0); |
mbed_official | 15:a81a8d6c1dfe | 840 | // We only support byte buffers for now |
mbed_official | 15:a81a8d6c1dfe | 841 | MBED_ASSERT(width == 8); |
mbed_official | 15:a81a8d6c1dfe | 842 | |
mbed_official | 15:a81a8d6c1dfe | 843 | if(serial_rx_active(obj)) return; |
mbed_official | 15:a81a8d6c1dfe | 844 | |
mbed_official | 15:a81a8d6c1dfe | 845 | obj->rx_buff.buffer = rx; |
mbed_official | 15:a81a8d6c1dfe | 846 | obj->rx_buff.length = rx_length; |
mbed_official | 15:a81a8d6c1dfe | 847 | obj->rx_buff.pos = 0; |
mbed_official | 15:a81a8d6c1dfe | 848 | |
mbed_official | 15:a81a8d6c1dfe | 849 | return; |
mbed_official | 15:a81a8d6c1dfe | 850 | } |
mbed_official | 15:a81a8d6c1dfe | 851 | |
mbed_official | 15:a81a8d6c1dfe | 852 | void serial_set_char_match(serial_t *obj, uint8_t char_match) |
mbed_official | 15:a81a8d6c1dfe | 853 | { |
mbed_official | 15:a81a8d6c1dfe | 854 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 855 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 856 | if (char_match != SERIAL_RESERVED_CHAR_MATCH) { |
mbed_official | 15:a81a8d6c1dfe | 857 | obj->char_match = char_match; |
mbed_official | 15:a81a8d6c1dfe | 858 | } |
mbed_official | 15:a81a8d6c1dfe | 859 | } |
mbed_official | 15:a81a8d6c1dfe | 860 | |
mbed_official | 15:a81a8d6c1dfe | 861 | /************************************ |
mbed_official | 15:a81a8d6c1dfe | 862 | * TRANSFER FUNCTIONS * |
mbed_official | 15:a81a8d6c1dfe | 863 | ***********************************/ |
mbed_official | 15:a81a8d6c1dfe | 864 | 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) |
mbed_official | 15:a81a8d6c1dfe | 865 | { |
mbed_official | 15:a81a8d6c1dfe | 866 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 867 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 868 | MBED_ASSERT(tx != (void*)0); |
mbed_official | 15:a81a8d6c1dfe | 869 | if(tx_length == 0) return 0; |
mbed_official | 15:a81a8d6c1dfe | 870 | |
mbed_official | 15:a81a8d6c1dfe | 871 | serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width); |
mbed_official | 15:a81a8d6c1dfe | 872 | serial_tx_enable_event(obj, event, true); |
mbed_official | 15:a81a8d6c1dfe | 873 | |
mbed_official | 15:a81a8d6c1dfe | 874 | // if( hint == DMA_USAGE_NEVER) { //TODO: DMA to be implemented later |
mbed_official | 15:a81a8d6c1dfe | 875 | NVIC_ClearPendingIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 876 | NVIC_DisableIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 877 | NVIC_SetVector(get_serial_irq_num(obj), (uint32_t)handler); |
mbed_official | 15:a81a8d6c1dfe | 878 | NVIC_EnableIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 879 | |
mbed_official | 15:a81a8d6c1dfe | 880 | if (pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 881 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 882 | _USART(obj).INTENSET.reg = SERCOM_USART_INTFLAG_DRE; |
mbed_official | 15:a81a8d6c1dfe | 883 | } |
mbed_official | 15:a81a8d6c1dfe | 884 | // } |
mbed_official | 15:a81a8d6c1dfe | 885 | return 0; |
mbed_official | 15:a81a8d6c1dfe | 886 | } |
mbed_official | 15:a81a8d6c1dfe | 887 | |
mbed_official | 15:a81a8d6c1dfe | 888 | 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) |
mbed_official | 15:a81a8d6c1dfe | 889 | { |
mbed_official | 15:a81a8d6c1dfe | 890 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 891 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 892 | MBED_ASSERT(rx != (void*)0); |
mbed_official | 15:a81a8d6c1dfe | 893 | |
mbed_official | 15:a81a8d6c1dfe | 894 | serial_rx_enable_event(obj, SERIAL_EVENT_RX_ALL, false); |
mbed_official | 15:a81a8d6c1dfe | 895 | serial_rx_enable_event(obj, event, true); |
mbed_official | 15:a81a8d6c1dfe | 896 | serial_set_char_match(obj, char_match); |
mbed_official | 15:a81a8d6c1dfe | 897 | serial_rx_buffer_set(obj, rx, rx_length, rx_width); |
mbed_official | 15:a81a8d6c1dfe | 898 | |
mbed_official | 15:a81a8d6c1dfe | 899 | // if( hint == DMA_USAGE_NEVER) { //TODO: DMA to be implemented later |
mbed_official | 15:a81a8d6c1dfe | 900 | NVIC_ClearPendingIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 901 | NVIC_DisableIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 902 | NVIC_SetVector(get_serial_irq_num(obj), (uint32_t)handler); |
mbed_official | 15:a81a8d6c1dfe | 903 | NVIC_EnableIRQ(get_serial_irq_num(obj)); |
mbed_official | 15:a81a8d6c1dfe | 904 | |
mbed_official | 15:a81a8d6c1dfe | 905 | if (pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 906 | _USART(obj).INTENSET.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 907 | } |
mbed_official | 15:a81a8d6c1dfe | 908 | // } |
mbed_official | 15:a81a8d6c1dfe | 909 | return; |
mbed_official | 15:a81a8d6c1dfe | 910 | } |
mbed_official | 15:a81a8d6c1dfe | 911 | |
mbed_official | 15:a81a8d6c1dfe | 912 | uint8_t serial_tx_active(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 913 | { |
mbed_official | 15:a81a8d6c1dfe | 914 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 915 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 916 | return ((obj->tx_buff.length > 0) ? true : false); |
mbed_official | 15:a81a8d6c1dfe | 917 | } |
mbed_official | 15:a81a8d6c1dfe | 918 | |
mbed_official | 15:a81a8d6c1dfe | 919 | uint8_t serial_rx_active(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 920 | { |
mbed_official | 15:a81a8d6c1dfe | 921 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 922 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 923 | return ((obj->rx_buff.length > 0) ? true : false); |
mbed_official | 15:a81a8d6c1dfe | 924 | } |
mbed_official | 15:a81a8d6c1dfe | 925 | |
mbed_official | 15:a81a8d6c1dfe | 926 | int serial_tx_irq_handler_asynch(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 927 | { |
mbed_official | 15:a81a8d6c1dfe | 928 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 929 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 930 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 931 | serial_tx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 932 | return SERIAL_EVENT_TX_COMPLETE & obj->serial.events; |
mbed_official | 15:a81a8d6c1dfe | 933 | } |
mbed_official | 15:a81a8d6c1dfe | 934 | |
mbed_official | 15:a81a8d6c1dfe | 935 | int serial_rx_irq_handler_asynch(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 936 | { |
mbed_official | 15:a81a8d6c1dfe | 937 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 938 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 939 | int event = 0; |
mbed_official | 15:a81a8d6c1dfe | 940 | /* This interrupt handler is called from USART irq */ |
mbed_official | 15:a81a8d6c1dfe | 941 | uint8_t *buf = (uint8_t*)obj->rx_buff.buffer; |
mbed_official | 15:a81a8d6c1dfe | 942 | uint8_t error_code = 0; |
mbed_official | 15:a81a8d6c1dfe | 943 | uint16_t received_data = 0; |
mbed_official | 15:a81a8d6c1dfe | 944 | |
mbed_official | 15:a81a8d6c1dfe | 945 | error_code = (uint8_t)(_USART(obj).STATUS.reg & SERCOM_USART_STATUS_MASK); |
mbed_official | 15:a81a8d6c1dfe | 946 | /* Check if an error has occurred during the receiving */ |
mbed_official | 15:a81a8d6c1dfe | 947 | if (error_code) { |
mbed_official | 15:a81a8d6c1dfe | 948 | /* Check which error occurred */ |
mbed_official | 15:a81a8d6c1dfe | 949 | if (error_code & SERCOM_USART_STATUS_FERR) { |
mbed_official | 15:a81a8d6c1dfe | 950 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 15:a81a8d6c1dfe | 951 | _USART(obj).STATUS.reg |= SERCOM_USART_STATUS_FERR; |
mbed_official | 15:a81a8d6c1dfe | 952 | serial_rx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 953 | return SERIAL_EVENT_RX_FRAMING_ERROR; |
mbed_official | 15:a81a8d6c1dfe | 954 | } else if (error_code & SERCOM_USART_STATUS_BUFOVF) { |
mbed_official | 15:a81a8d6c1dfe | 955 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 15:a81a8d6c1dfe | 956 | _USART(obj).STATUS.reg |= SERCOM_USART_STATUS_BUFOVF; |
mbed_official | 15:a81a8d6c1dfe | 957 | serial_rx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 958 | return SERIAL_EVENT_RX_OVERFLOW; |
mbed_official | 15:a81a8d6c1dfe | 959 | } else if (error_code & SERCOM_USART_STATUS_PERR) { |
mbed_official | 15:a81a8d6c1dfe | 960 | /* Store the error code and clear flag by writing 1 to it */ |
mbed_official | 15:a81a8d6c1dfe | 961 | _USART(obj).STATUS.reg |= SERCOM_USART_STATUS_PERR; |
mbed_official | 15:a81a8d6c1dfe | 962 | serial_rx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 963 | return SERIAL_EVENT_RX_PARITY_ERROR; |
mbed_official | 15:a81a8d6c1dfe | 964 | } |
mbed_official | 15:a81a8d6c1dfe | 965 | } |
mbed_official | 15:a81a8d6c1dfe | 966 | |
mbed_official | 15:a81a8d6c1dfe | 967 | /* Read current packet from DATA register, |
mbed_official | 15:a81a8d6c1dfe | 968 | * increment buffer pointer and decrement buffer length */ |
mbed_official | 15:a81a8d6c1dfe | 969 | received_data = (_USART(obj).DATA.reg & SERCOM_USART_DATA_MASK); |
mbed_official | 15:a81a8d6c1dfe | 970 | |
mbed_official | 15:a81a8d6c1dfe | 971 | /* Read value will be at least 8-bits long */ |
mbed_official | 15:a81a8d6c1dfe | 972 | buf[obj->rx_buff.pos] = received_data; |
mbed_official | 15:a81a8d6c1dfe | 973 | /* Increment 8-bit pointer */ |
mbed_official | 15:a81a8d6c1dfe | 974 | obj->rx_buff.pos++; |
mbed_official | 15:a81a8d6c1dfe | 975 | |
mbed_official | 15:a81a8d6c1dfe | 976 | /* Check if the last character have been received */ |
mbed_official | 15:a81a8d6c1dfe | 977 | if(--(obj->rx_buff.length) == 0) { |
mbed_official | 15:a81a8d6c1dfe | 978 | event |= SERIAL_EVENT_RX_COMPLETE; |
mbed_official | 15:a81a8d6c1dfe | 979 | if((buf[obj->rx_buff.pos - 1] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) { |
mbed_official | 15:a81a8d6c1dfe | 980 | event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
mbed_official | 15:a81a8d6c1dfe | 981 | } |
mbed_official | 15:a81a8d6c1dfe | 982 | _USART(obj).INTFLAG.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 983 | serial_rx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 984 | return event & obj->serial.events; |
mbed_official | 15:a81a8d6c1dfe | 985 | } |
mbed_official | 15:a81a8d6c1dfe | 986 | |
mbed_official | 15:a81a8d6c1dfe | 987 | /* Check for character match event */ |
mbed_official | 15:a81a8d6c1dfe | 988 | if((buf[obj->rx_buff.pos - 1] == obj->char_match) && (obj->serial.events & SERIAL_EVENT_RX_CHARACTER_MATCH)) { |
mbed_official | 15:a81a8d6c1dfe | 989 | event |= SERIAL_EVENT_RX_CHARACTER_MATCH; |
mbed_official | 15:a81a8d6c1dfe | 990 | } |
mbed_official | 15:a81a8d6c1dfe | 991 | |
mbed_official | 15:a81a8d6c1dfe | 992 | /* Return to the call back if character match occured */ |
mbed_official | 15:a81a8d6c1dfe | 993 | if(event != 0) { |
mbed_official | 15:a81a8d6c1dfe | 994 | serial_rx_abort_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 995 | return event & obj->serial.events; |
mbed_official | 15:a81a8d6c1dfe | 996 | } |
mbed_official | 15:a81a8d6c1dfe | 997 | return 0; |
mbed_official | 15:a81a8d6c1dfe | 998 | } |
mbed_official | 15:a81a8d6c1dfe | 999 | |
mbed_official | 15:a81a8d6c1dfe | 1000 | int serial_irq_handler_asynch(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 1001 | { |
mbed_official | 15:a81a8d6c1dfe | 1002 | //TODO: DMA to be implemented |
mbed_official | 15:a81a8d6c1dfe | 1003 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 1004 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 1005 | uint16_t interrupt_status; |
mbed_official | 15:a81a8d6c1dfe | 1006 | uint8_t *buf = obj->tx_buff.buffer; |
mbed_official | 15:a81a8d6c1dfe | 1007 | |
mbed_official | 15:a81a8d6c1dfe | 1008 | interrupt_status = _USART(obj).INTFLAG.reg; |
mbed_official | 15:a81a8d6c1dfe | 1009 | interrupt_status &= _USART(obj).INTENSET.reg; |
mbed_official | 15:a81a8d6c1dfe | 1010 | |
mbed_official | 15:a81a8d6c1dfe | 1011 | if (pUSART_S(obj)) { |
mbed_official | 15:a81a8d6c1dfe | 1012 | if (interrupt_status & SERCOM_USART_INTFLAG_DRE) { |
mbed_official | 15:a81a8d6c1dfe | 1013 | /* Interrupt has another TX source */ |
mbed_official | 15:a81a8d6c1dfe | 1014 | if(obj->tx_buff.pos >= obj->tx_buff.length) { |
mbed_official | 15:a81a8d6c1dfe | 1015 | /* Transfer complete. Switch off interrupt and return event. */ |
mbed_official | 15:a81a8d6c1dfe | 1016 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_DRE; |
mbed_official | 15:a81a8d6c1dfe | 1017 | _USART(obj).INTENSET.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 1018 | } else { |
mbed_official | 15:a81a8d6c1dfe | 1019 | while((serial_writable(obj)) && (obj->tx_buff.pos <= (obj->tx_buff.length - 1))) { |
mbed_official | 15:a81a8d6c1dfe | 1020 | _USART(obj).DATA.reg = buf[obj->tx_buff.pos]; |
mbed_official | 15:a81a8d6c1dfe | 1021 | obj->tx_buff.pos++; |
mbed_official | 15:a81a8d6c1dfe | 1022 | } |
mbed_official | 15:a81a8d6c1dfe | 1023 | } |
mbed_official | 15:a81a8d6c1dfe | 1024 | } |
mbed_official | 15:a81a8d6c1dfe | 1025 | if (interrupt_status & SERCOM_USART_INTFLAG_TXC) { |
mbed_official | 15:a81a8d6c1dfe | 1026 | return serial_tx_irq_handler_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 1027 | } |
mbed_official | 15:a81a8d6c1dfe | 1028 | if (interrupt_status & SERCOM_USART_INTFLAG_RXC) { |
mbed_official | 15:a81a8d6c1dfe | 1029 | return serial_rx_irq_handler_asynch(obj); |
mbed_official | 15:a81a8d6c1dfe | 1030 | } |
mbed_official | 15:a81a8d6c1dfe | 1031 | } |
mbed_official | 15:a81a8d6c1dfe | 1032 | return 0; |
mbed_official | 15:a81a8d6c1dfe | 1033 | } |
mbed_official | 15:a81a8d6c1dfe | 1034 | |
mbed_official | 15:a81a8d6c1dfe | 1035 | void serial_tx_abort_asynch(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 1036 | { |
mbed_official | 15:a81a8d6c1dfe | 1037 | //TODO: DMA to be implemented |
mbed_official | 15:a81a8d6c1dfe | 1038 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 1039 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 1040 | _USART(obj).INTFLAG.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 1041 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_TXC; |
mbed_official | 15:a81a8d6c1dfe | 1042 | obj->tx_buff.length = 0; |
mbed_official | 15:a81a8d6c1dfe | 1043 | obj->rx_buff.pos = 0; |
mbed_official | 15:a81a8d6c1dfe | 1044 | |
mbed_official | 15:a81a8d6c1dfe | 1045 | } |
mbed_official | 15:a81a8d6c1dfe | 1046 | |
mbed_official | 15:a81a8d6c1dfe | 1047 | void serial_rx_abort_asynch(serial_t *obj) |
mbed_official | 15:a81a8d6c1dfe | 1048 | { |
mbed_official | 15:a81a8d6c1dfe | 1049 | //TODO: DMA to be implemented |
mbed_official | 15:a81a8d6c1dfe | 1050 | /* Sanity check arguments */ |
mbed_official | 15:a81a8d6c1dfe | 1051 | MBED_ASSERT(obj); |
mbed_official | 15:a81a8d6c1dfe | 1052 | _USART(obj).INTFLAG.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 1053 | _USART(obj).INTENCLR.reg = SERCOM_USART_INTFLAG_RXC; |
mbed_official | 15:a81a8d6c1dfe | 1054 | obj->rx_buff.length = 0; |
mbed_official | 15:a81a8d6c1dfe | 1055 | obj->rx_buff.pos = 0; |
mbed_official | 15:a81a8d6c1dfe | 1056 | } |
mbed_official | 15:a81a8d6c1dfe | 1057 | |
mbed_official | 15:a81a8d6c1dfe | 1058 | #endif |