mbed library sources
Fork of mbed-src by
targets/hal/TARGET_NORDIC/TARGET_MCU_NRF51822/serial_api.c@300:55638feb26a4, 2014-08-27 (annotated)
- Committer:
- mbed_official
- Date:
- Wed Aug 27 08:45:06 2014 +0100
- Revision:
- 300:55638feb26a4
- Parent:
- 288:17565898c031
- Child:
- 339:40bd4701f3e2
Synchronized with git revision 90467175c04ad81c20cdf7b2ddb86c54f5f3dcbb
Full URL: https://github.com/mbedmicro/mbed/commit/90467175c04ad81c20cdf7b2ddb86c54f5f3dcbb/
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
mbed_official | 85:e1a8e879a6a9 | 1 | /* mbed Microcontroller Library |
mbed_official | 104:a6a92e2e5a92 | 2 | * Copyright (c) 2013 Nordic Semiconductor |
mbed_official | 85:e1a8e879a6a9 | 3 | * |
mbed_official | 85:e1a8e879a6a9 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
mbed_official | 85:e1a8e879a6a9 | 5 | * you may not use this file except in compliance with the License. |
mbed_official | 85:e1a8e879a6a9 | 6 | * You may obtain a copy of the License at |
mbed_official | 85:e1a8e879a6a9 | 7 | * |
mbed_official | 85:e1a8e879a6a9 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
mbed_official | 85:e1a8e879a6a9 | 9 | * |
mbed_official | 85:e1a8e879a6a9 | 10 | * Unless required by applicable law or agreed to in writing, software |
mbed_official | 85:e1a8e879a6a9 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
mbed_official | 85:e1a8e879a6a9 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
mbed_official | 85:e1a8e879a6a9 | 13 | * See the License for the specific language governing permissions and |
mbed_official | 85:e1a8e879a6a9 | 14 | * limitations under the License. |
mbed_official | 85:e1a8e879a6a9 | 15 | */ |
mbed_official | 85:e1a8e879a6a9 | 16 | // math.h required for floating point operations for baud rate calculation |
mbed_official | 85:e1a8e879a6a9 | 17 | //#include <math.h> |
mbed_official | 85:e1a8e879a6a9 | 18 | #include <string.h> |
mbed_official | 227:7bd0639b8911 | 19 | #include "mbed_assert.h" |
mbed_official | 85:e1a8e879a6a9 | 20 | |
mbed_official | 85:e1a8e879a6a9 | 21 | #include "serial_api.h" |
mbed_official | 85:e1a8e879a6a9 | 22 | #include "cmsis.h" |
mbed_official | 85:e1a8e879a6a9 | 23 | #include "pinmap.h" |
mbed_official | 227:7bd0639b8911 | 24 | |
mbed_official | 85:e1a8e879a6a9 | 25 | /****************************************************************************** |
mbed_official | 85:e1a8e879a6a9 | 26 | * INITIALIZATION |
mbed_official | 85:e1a8e879a6a9 | 27 | ******************************************************************************/ |
mbed_official | 85:e1a8e879a6a9 | 28 | #define UART_NUM 1 |
mbed_official | 85:e1a8e879a6a9 | 29 | |
mbed_official | 85:e1a8e879a6a9 | 30 | static uint32_t serial_irq_ids[UART_NUM] = {0}; |
mbed_official | 85:e1a8e879a6a9 | 31 | static uart_irq_handler irq_handler; |
mbed_official | 300:55638feb26a4 | 32 | static uint32_t acceptedSpeeds[16][2] = {{1200, UART_BAUDRATE_BAUDRATE_Baud1200}, |
mbed_official | 300:55638feb26a4 | 33 | {2400, UART_BAUDRATE_BAUDRATE_Baud2400}, |
mbed_official | 300:55638feb26a4 | 34 | {4800, UART_BAUDRATE_BAUDRATE_Baud4800}, |
mbed_official | 300:55638feb26a4 | 35 | {9600, UART_BAUDRATE_BAUDRATE_Baud9600}, |
mbed_official | 300:55638feb26a4 | 36 | {14400, UART_BAUDRATE_BAUDRATE_Baud14400}, |
mbed_official | 300:55638feb26a4 | 37 | {19200, UART_BAUDRATE_BAUDRATE_Baud19200}, |
mbed_official | 300:55638feb26a4 | 38 | {28800, UART_BAUDRATE_BAUDRATE_Baud28800}, |
mbed_official | 300:55638feb26a4 | 39 | {38400, UART_BAUDRATE_BAUDRATE_Baud38400}, |
mbed_official | 300:55638feb26a4 | 40 | {57600, UART_BAUDRATE_BAUDRATE_Baud57600}, |
mbed_official | 300:55638feb26a4 | 41 | {76800, UART_BAUDRATE_BAUDRATE_Baud76800}, |
mbed_official | 300:55638feb26a4 | 42 | {115200, UART_BAUDRATE_BAUDRATE_Baud115200}, |
mbed_official | 300:55638feb26a4 | 43 | {230400, UART_BAUDRATE_BAUDRATE_Baud230400}, |
mbed_official | 300:55638feb26a4 | 44 | {250000, UART_BAUDRATE_BAUDRATE_Baud250000}, |
mbed_official | 300:55638feb26a4 | 45 | {460800, UART_BAUDRATE_BAUDRATE_Baud460800}, |
mbed_official | 300:55638feb26a4 | 46 | {921600, UART_BAUDRATE_BAUDRATE_Baud921600}, |
mbed_official | 300:55638feb26a4 | 47 | {1000000, UART_BAUDRATE_BAUDRATE_Baud1M}}; |
mbed_official | 85:e1a8e879a6a9 | 48 | |
mbed_official | 85:e1a8e879a6a9 | 49 | int stdio_uart_inited = 0; |
mbed_official | 85:e1a8e879a6a9 | 50 | serial_t stdio_uart; |
mbed_official | 85:e1a8e879a6a9 | 51 | |
mbed_official | 85:e1a8e879a6a9 | 52 | |
mbed_official | 85:e1a8e879a6a9 | 53 | void serial_init(serial_t *obj, PinName tx, PinName rx) { |
mbed_official | 288:17565898c031 | 54 | UARTName uart = UART_0; |
mbed_official | 300:55638feb26a4 | 55 | |
mbed_official | 227:7bd0639b8911 | 56 | MBED_ASSERT((int)uart != NC); |
mbed_official | 300:55638feb26a4 | 57 | |
mbed_official | 85:e1a8e879a6a9 | 58 | obj->uart = (NRF_UART_Type *)uart; |
mbed_official | 300:55638feb26a4 | 59 | |
mbed_official | 227:7bd0639b8911 | 60 | //pin configurations -- |
mbed_official | 227:7bd0639b8911 | 61 | //outputs |
mbed_official | 300:55638feb26a4 | 62 | NRF_GPIO->DIR |= (1 << tx); //TX_PIN_NUMBER); |
mbed_official | 300:55638feb26a4 | 63 | NRF_GPIO->DIR |= (1 << RTS_PIN_NUMBER); |
mbed_official | 85:e1a8e879a6a9 | 64 | |
mbed_official | 300:55638feb26a4 | 65 | NRF_GPIO->DIR &= ~(1 << rx); //RX_PIN_NUMBER); |
mbed_official | 300:55638feb26a4 | 66 | NRF_GPIO->DIR &= ~(1 << CTS_PIN_NUMBER); |
mbed_official | 300:55638feb26a4 | 67 | |
mbed_official | 85:e1a8e879a6a9 | 68 | obj->uart->PSELRTS = RTS_PIN_NUMBER; |
mbed_official | 300:55638feb26a4 | 69 | obj->uart->PSELTXD = tx; //TX_PIN_NUMBER; |
mbed_official | 300:55638feb26a4 | 70 | |
mbed_official | 85:e1a8e879a6a9 | 71 | //inputs |
mbed_official | 85:e1a8e879a6a9 | 72 | obj->uart->PSELCTS = CTS_PIN_NUMBER; |
mbed_official | 300:55638feb26a4 | 73 | obj->uart->PSELRXD = rx; //RX_PIN_NUMBER; |
mbed_official | 300:55638feb26a4 | 74 | |
mbed_official | 300:55638feb26a4 | 75 | |
mbed_official | 85:e1a8e879a6a9 | 76 | // set default baud rate and format |
mbed_official | 85:e1a8e879a6a9 | 77 | serial_baud (obj, 9600); |
mbed_official | 85:e1a8e879a6a9 | 78 | serial_format(obj, 8, ParityNone, 1); |
mbed_official | 300:55638feb26a4 | 79 | |
mbed_official | 300:55638feb26a4 | 80 | obj->uart->ENABLE = (UART_ENABLE_ENABLE_Enabled << UART_ENABLE_ENABLE_Pos); |
mbed_official | 85:e1a8e879a6a9 | 81 | obj->uart->TASKS_STARTTX = 1; |
mbed_official | 85:e1a8e879a6a9 | 82 | obj->uart->TASKS_STARTRX = 1; |
mbed_official | 300:55638feb26a4 | 83 | obj->uart->EVENTS_RXDRDY = 0; |
mbed_official | 300:55638feb26a4 | 84 | |
mbed_official | 85:e1a8e879a6a9 | 85 | obj->index = 0; |
mbed_official | 300:55638feb26a4 | 86 | |
mbed_official | 85:e1a8e879a6a9 | 87 | // set rx/tx pins in PullUp mode |
mbed_official | 85:e1a8e879a6a9 | 88 | pin_mode(tx, PullUp); |
mbed_official | 85:e1a8e879a6a9 | 89 | pin_mode(rx, PullUp); |
mbed_official | 300:55638feb26a4 | 90 | |
mbed_official | 85:e1a8e879a6a9 | 91 | if (uart == STDIO_UART) { |
mbed_official | 85:e1a8e879a6a9 | 92 | stdio_uart_inited = 1; |
mbed_official | 85:e1a8e879a6a9 | 93 | memcpy(&stdio_uart, obj, sizeof(serial_t)); |
mbed_official | 85:e1a8e879a6a9 | 94 | } |
mbed_official | 85:e1a8e879a6a9 | 95 | } |
mbed_official | 85:e1a8e879a6a9 | 96 | |
mbed_official | 300:55638feb26a4 | 97 | void serial_free(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 98 | { |
mbed_official | 85:e1a8e879a6a9 | 99 | serial_irq_ids[obj->index] = 0; |
mbed_official | 85:e1a8e879a6a9 | 100 | } |
mbed_official | 85:e1a8e879a6a9 | 101 | |
mbed_official | 85:e1a8e879a6a9 | 102 | // serial_baud |
mbed_official | 85:e1a8e879a6a9 | 103 | // set the baud rate, taking in to account the current SystemFrequency |
mbed_official | 300:55638feb26a4 | 104 | void serial_baud(serial_t *obj, int baudrate) |
mbed_official | 300:55638feb26a4 | 105 | { |
mbed_official | 300:55638feb26a4 | 106 | if (baudrate<=1200) { |
mbed_official | 85:e1a8e879a6a9 | 107 | obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1200; |
mbed_official | 85:e1a8e879a6a9 | 108 | return; |
mbed_official | 227:7bd0639b8911 | 109 | } |
mbed_official | 300:55638feb26a4 | 110 | |
mbed_official | 300:55638feb26a4 | 111 | for (int i = 1; i<16; i++) { |
mbed_official | 300:55638feb26a4 | 112 | if (baudrate<acceptedSpeeds[i][0]) { |
mbed_official | 300:55638feb26a4 | 113 | obj->uart->BAUDRATE = acceptedSpeeds[i - 1][1]; |
mbed_official | 85:e1a8e879a6a9 | 114 | return; |
mbed_official | 85:e1a8e879a6a9 | 115 | } |
mbed_official | 85:e1a8e879a6a9 | 116 | } |
mbed_official | 85:e1a8e879a6a9 | 117 | obj->uart->BAUDRATE = UART_BAUDRATE_BAUDRATE_Baud1M; |
mbed_official | 85:e1a8e879a6a9 | 118 | } |
mbed_official | 85:e1a8e879a6a9 | 119 | |
mbed_official | 300:55638feb26a4 | 120 | void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) |
mbed_official | 300:55638feb26a4 | 121 | { |
mbed_official | 85:e1a8e879a6a9 | 122 | // 0: 1 stop bits, 1: 2 stop bits |
mbed_official | 300:55638feb26a4 | 123 | // int parity_enable, parity_select; |
mbed_official | 85:e1a8e879a6a9 | 124 | switch (parity) { |
mbed_official | 227:7bd0639b8911 | 125 | case ParityNone: |
mbed_official | 300:55638feb26a4 | 126 | obj->uart->CONFIG = 0; |
mbed_official | 300:55638feb26a4 | 127 | break; |
mbed_official | 85:e1a8e879a6a9 | 128 | default: |
mbed_official | 300:55638feb26a4 | 129 | obj->uart->CONFIG = (UART_CONFIG_PARITY_Included << UART_CONFIG_PARITY_Pos); |
mbed_official | 85:e1a8e879a6a9 | 130 | return; |
mbed_official | 85:e1a8e879a6a9 | 131 | } |
mbed_official | 85:e1a8e879a6a9 | 132 | //no Flow Control |
mbed_official | 85:e1a8e879a6a9 | 133 | } |
mbed_official | 85:e1a8e879a6a9 | 134 | |
mbed_official | 85:e1a8e879a6a9 | 135 | //****************************************************************************** |
mbed_official | 85:e1a8e879a6a9 | 136 | // * INTERRUPT HANDLING |
mbed_official | 85:e1a8e879a6a9 | 137 | //****************************************************************************** |
mbed_official | 300:55638feb26a4 | 138 | static inline void uart_irq(uint32_t iir, uint32_t index) |
mbed_official | 300:55638feb26a4 | 139 | { |
mbed_official | 85:e1a8e879a6a9 | 140 | SerialIrq irq_type; |
mbed_official | 85:e1a8e879a6a9 | 141 | switch (iir) { |
mbed_official | 227:7bd0639b8911 | 142 | case 1: |
mbed_official | 227:7bd0639b8911 | 143 | irq_type = TxIrq; |
mbed_official | 300:55638feb26a4 | 144 | break; |
mbed_official | 227:7bd0639b8911 | 145 | case 2: |
mbed_official | 227:7bd0639b8911 | 146 | irq_type = RxIrq; |
mbed_official | 300:55638feb26a4 | 147 | break; |
mbed_official | 300:55638feb26a4 | 148 | |
mbed_official | 300:55638feb26a4 | 149 | default: |
mbed_official | 300:55638feb26a4 | 150 | return; |
mbed_official | 85:e1a8e879a6a9 | 151 | } |
mbed_official | 300:55638feb26a4 | 152 | |
mbed_official | 300:55638feb26a4 | 153 | if (serial_irq_ids[index] != 0) { |
mbed_official | 85:e1a8e879a6a9 | 154 | irq_handler(serial_irq_ids[index], irq_type); |
mbed_official | 85:e1a8e879a6a9 | 155 | } |
mbed_official | 85:e1a8e879a6a9 | 156 | } |
mbed_official | 300:55638feb26a4 | 157 | |
mbed_official | 85:e1a8e879a6a9 | 158 | #ifdef __cplusplus |
mbed_official | 85:e1a8e879a6a9 | 159 | extern "C" { |
mbed_official | 227:7bd0639b8911 | 160 | #endif |
mbed_official | 85:e1a8e879a6a9 | 161 | void UART0_IRQHandler() |
mbed_official | 85:e1a8e879a6a9 | 162 | { |
mbed_official | 300:55638feb26a4 | 163 | uint32_t irtype = 0; |
mbed_official | 300:55638feb26a4 | 164 | |
mbed_official | 300:55638feb26a4 | 165 | if (NRF_UART0->EVENTS_TXDRDY) { |
mbed_official | 300:55638feb26a4 | 166 | irtype = 1; |
mbed_official | 300:55638feb26a4 | 167 | } else if (NRF_UART0->EVENTS_RXDRDY) { |
mbed_official | 300:55638feb26a4 | 168 | irtype = 2; |
mbed_official | 85:e1a8e879a6a9 | 169 | } |
mbed_official | 85:e1a8e879a6a9 | 170 | uart_irq(irtype, 0); |
mbed_official | 85:e1a8e879a6a9 | 171 | } |
mbed_official | 300:55638feb26a4 | 172 | |
mbed_official | 85:e1a8e879a6a9 | 173 | #ifdef __cplusplus |
mbed_official | 85:e1a8e879a6a9 | 174 | } |
mbed_official | 227:7bd0639b8911 | 175 | #endif |
mbed_official | 300:55638feb26a4 | 176 | void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) |
mbed_official | 300:55638feb26a4 | 177 | { |
mbed_official | 300:55638feb26a4 | 178 | irq_handler = handler; |
mbed_official | 85:e1a8e879a6a9 | 179 | serial_irq_ids[obj->index] = id; |
mbed_official | 85:e1a8e879a6a9 | 180 | } |
mbed_official | 85:e1a8e879a6a9 | 181 | |
mbed_official | 300:55638feb26a4 | 182 | void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) |
mbed_official | 300:55638feb26a4 | 183 | { |
mbed_official | 85:e1a8e879a6a9 | 184 | IRQn_Type irq_n = (IRQn_Type)0; |
mbed_official | 85:e1a8e879a6a9 | 185 | |
mbed_official | 85:e1a8e879a6a9 | 186 | switch ((int)obj->uart) { |
mbed_official | 300:55638feb26a4 | 187 | case UART_0: |
mbed_official | 300:55638feb26a4 | 188 | irq_n = UART0_IRQn; |
mbed_official | 85:e1a8e879a6a9 | 189 | break; |
mbed_official | 85:e1a8e879a6a9 | 190 | } |
mbed_official | 300:55638feb26a4 | 191 | |
mbed_official | 85:e1a8e879a6a9 | 192 | if (enable) { |
mbed_official | 85:e1a8e879a6a9 | 193 | switch (irq) { |
mbed_official | 300:55638feb26a4 | 194 | case RxIrq: |
mbed_official | 300:55638feb26a4 | 195 | obj->uart->INTENSET |= (UART_INTENSET_RXDRDY_Msk); |
mbed_official | 300:55638feb26a4 | 196 | break; |
mbed_official | 300:55638feb26a4 | 197 | case TxIrq: |
mbed_official | 300:55638feb26a4 | 198 | obj->uart->INTENSET |= (UART_INTENSET_TXDRDY_Msk); |
mbed_official | 300:55638feb26a4 | 199 | break; |
mbed_official | 85:e1a8e879a6a9 | 200 | } |
mbed_official | 85:e1a8e879a6a9 | 201 | NVIC_SetPriority(irq_n, 3); |
mbed_official | 85:e1a8e879a6a9 | 202 | NVIC_EnableIRQ(irq_n); |
mbed_official | 300:55638feb26a4 | 203 | } else { // disable |
mbed_official | 85:e1a8e879a6a9 | 204 | int all_disabled = 0; |
mbed_official | 85:e1a8e879a6a9 | 205 | switch (irq) { |
mbed_official | 300:55638feb26a4 | 206 | case RxIrq: |
mbed_official | 300:55638feb26a4 | 207 | obj->uart->INTENSET &= ~(UART_INTENSET_RXDRDY_Msk); |
mbed_official | 300:55638feb26a4 | 208 | all_disabled = (obj->uart->INTENSET & (UART_INTENSET_TXDRDY_Msk))==0; |
mbed_official | 300:55638feb26a4 | 209 | break; |
mbed_official | 300:55638feb26a4 | 210 | case TxIrq: |
mbed_official | 300:55638feb26a4 | 211 | obj->uart->INTENSET &= ~(UART_INTENSET_TXDRDY_Msk); |
mbed_official | 300:55638feb26a4 | 212 | all_disabled = (obj->uart->INTENSET & (UART_INTENSET_RXDRDY_Msk))==0; |
mbed_official | 300:55638feb26a4 | 213 | break; |
mbed_official | 85:e1a8e879a6a9 | 214 | } |
mbed_official | 300:55638feb26a4 | 215 | |
mbed_official | 300:55638feb26a4 | 216 | if (all_disabled) { |
mbed_official | 85:e1a8e879a6a9 | 217 | NVIC_DisableIRQ(irq_n); |
mbed_official | 85:e1a8e879a6a9 | 218 | } |
mbed_official | 85:e1a8e879a6a9 | 219 | } |
mbed_official | 85:e1a8e879a6a9 | 220 | } |
mbed_official | 85:e1a8e879a6a9 | 221 | |
mbed_official | 85:e1a8e879a6a9 | 222 | //****************************************************************************** |
mbed_official | 85:e1a8e879a6a9 | 223 | //* READ/WRITE |
mbed_official | 85:e1a8e879a6a9 | 224 | //****************************************************************************** |
mbed_official | 300:55638feb26a4 | 225 | int serial_getc(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 226 | { |
mbed_official | 300:55638feb26a4 | 227 | while (!serial_readable(obj)) { |
mbed_official | 300:55638feb26a4 | 228 | } |
mbed_official | 300:55638feb26a4 | 229 | |
mbed_official | 85:e1a8e879a6a9 | 230 | obj->uart->EVENTS_RXDRDY = 0; |
mbed_official | 300:55638feb26a4 | 231 | |
mbed_official | 85:e1a8e879a6a9 | 232 | return (uint8_t)obj->uart->RXD; |
mbed_official | 85:e1a8e879a6a9 | 233 | } |
mbed_official | 85:e1a8e879a6a9 | 234 | |
mbed_official | 300:55638feb26a4 | 235 | void serial_putc(serial_t *obj, int c) |
mbed_official | 300:55638feb26a4 | 236 | { |
mbed_official | 85:e1a8e879a6a9 | 237 | obj->uart->TXD = (uint8_t)c; |
mbed_official | 300:55638feb26a4 | 238 | |
mbed_official | 300:55638feb26a4 | 239 | while (!serial_writable(obj)) { |
mbed_official | 300:55638feb26a4 | 240 | } |
mbed_official | 300:55638feb26a4 | 241 | |
mbed_official | 300:55638feb26a4 | 242 | obj->uart->EVENTS_TXDRDY = 0; |
mbed_official | 85:e1a8e879a6a9 | 243 | } |
mbed_official | 85:e1a8e879a6a9 | 244 | |
mbed_official | 300:55638feb26a4 | 245 | int serial_readable(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 246 | { |
mbed_official | 85:e1a8e879a6a9 | 247 | return (obj->uart->EVENTS_RXDRDY == 1); |
mbed_official | 85:e1a8e879a6a9 | 248 | } |
mbed_official | 85:e1a8e879a6a9 | 249 | |
mbed_official | 300:55638feb26a4 | 250 | int serial_writable(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 251 | { |
mbed_official | 85:e1a8e879a6a9 | 252 | return (obj->uart->EVENTS_TXDRDY ==1); |
mbed_official | 85:e1a8e879a6a9 | 253 | } |
mbed_official | 85:e1a8e879a6a9 | 254 | |
mbed_official | 300:55638feb26a4 | 255 | void serial_break_set(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 256 | { |
mbed_official | 85:e1a8e879a6a9 | 257 | obj->uart->TASKS_SUSPEND = 1; |
mbed_official | 85:e1a8e879a6a9 | 258 | } |
mbed_official | 85:e1a8e879a6a9 | 259 | |
mbed_official | 300:55638feb26a4 | 260 | void serial_break_clear(serial_t *obj) |
mbed_official | 300:55638feb26a4 | 261 | { |
mbed_official | 85:e1a8e879a6a9 | 262 | obj->uart->TASKS_STARTTX = 1; |
mbed_official | 85:e1a8e879a6a9 | 263 | obj->uart->TASKS_STARTRX = 1; |
mbed_official | 85:e1a8e879a6a9 | 264 | } |