Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

targets/TARGET_STM/TARGET_STM32L1/serial_api.c@166:33361e55dd8c, 2017-08-23 (annotated)

Committer:
iftaziz
Date:
Wed Aug 23 10:32:38 2017 +0000
Revision:
166:33361e55dd8c
Parent:
149:156823d33999 
r1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 149:156823d33999 1 /* mbed Microcontroller Library
<> 149:156823d33999 2 *******************************************************************************
<> 149:156823d33999 3 * Copyright (c) 2014, STMicroelectronics
<> 149:156823d33999 4 * All rights reserved.
<> 149:156823d33999 5 *
<> 149:156823d33999 6 * Redistribution and use in source and binary forms, with or without
<> 149:156823d33999 7 * modification, are permitted provided that the following conditions are met:
<> 149:156823d33999 8 *
<> 149:156823d33999 9 * 1. Redistributions of source code must retain the above copyright notice,
<> 149:156823d33999 10 * this list of conditions and the following disclaimer.
<> 149:156823d33999 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
<> 149:156823d33999 12 * this list of conditions and the following disclaimer in the documentation
<> 149:156823d33999 13 * and/or other materials provided with the distribution.
<> 149:156823d33999 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
<> 149:156823d33999 15 * may be used to endorse or promote products derived from this software
<> 149:156823d33999 16 * without specific prior written permission.
<> 149:156823d33999 17 *
<> 149:156823d33999 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
<> 149:156823d33999 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
<> 149:156823d33999 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
<> 149:156823d33999 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
<> 149:156823d33999 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
<> 149:156823d33999 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
<> 149:156823d33999 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
<> 149:156823d33999 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
<> 149:156823d33999 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
<> 149:156823d33999 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
<> 149:156823d33999 28 *******************************************************************************
<> 149:156823d33999 29 */
<> 149:156823d33999 30 #include "mbed_assert.h"
<> 149:156823d33999 31 #include "serial_api.h"
<> 149:156823d33999 32
<> 149:156823d33999 33 #if DEVICE_SERIAL
<> 149:156823d33999 34
<> 149:156823d33999 35 #include "cmsis.h"
<> 149:156823d33999 36 #include "pinmap.h"
<> 149:156823d33999 37 #include "mbed_error.h"
<> 149:156823d33999 38 #include <string.h>
<> 149:156823d33999 39 #include "PeripheralPins.h"
<> 149:156823d33999 40
<> 149:156823d33999 41 #define UART_NUM (5)
<> 149:156823d33999 42
<> 149:156823d33999 43 static uint32_t serial_irq_ids[UART_NUM] = {0};
<> 149:156823d33999 44 static UART_HandleTypeDef uart_handlers[UART_NUM];
<> 149:156823d33999 45
<> 149:156823d33999 46 static uart_irq_handler irq_handler;
<> 149:156823d33999 47
<> 149:156823d33999 48 int stdio_uart_inited = 0;
<> 149:156823d33999 49 serial_t stdio_uart;
<> 149:156823d33999 50
<> 149:156823d33999 51 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 52 #define SERIAL_S(obj) (&((obj)->serial))
<> 149:156823d33999 53 #else
<> 149:156823d33999 54 #define SERIAL_S(obj) (obj)
<> 149:156823d33999 55 #endif
<> 149:156823d33999 56
<> 149:156823d33999 57 static void init_uart(serial_t *obj)
<> 149:156823d33999 58 {
<> 149:156823d33999 59 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 60 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 61 huart->Instance = (USART_TypeDef *)(obj_s->uart);
<> 149:156823d33999 62
<> 149:156823d33999 63 huart->Init.BaudRate = obj_s->baudrate;
<> 149:156823d33999 64 huart->Init.WordLength = obj_s->databits;
<> 149:156823d33999 65 huart->Init.StopBits = obj_s->stopbits;
<> 149:156823d33999 66 huart->Init.Parity = obj_s->parity;
<> 149:156823d33999 67 #if DEVICE_SERIAL_FC
<> 149:156823d33999 68 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
<> 149:156823d33999 69 #else
<> 149:156823d33999 70 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
<> 149:156823d33999 71 #endif
<> 149:156823d33999 72 huart->TxXferCount = 0;
<> 149:156823d33999 73 huart->TxXferSize = 0;
<> 149:156823d33999 74 huart->RxXferCount = 0;
<> 149:156823d33999 75 huart->RxXferSize = 0;
<> 149:156823d33999 76
<> 149:156823d33999 77 if (obj_s->pin_rx == NC) {
<> 149:156823d33999 78 huart->Init.Mode = UART_MODE_TX;
<> 149:156823d33999 79 } else if (obj_s->pin_tx == NC) {
<> 149:156823d33999 80 huart->Init.Mode = UART_MODE_RX;
<> 149:156823d33999 81 } else {
<> 149:156823d33999 82 huart->Init.Mode = UART_MODE_TX_RX;
<> 149:156823d33999 83 }
<> 149:156823d33999 84
<> 149:156823d33999 85 if (HAL_UART_Init(huart) != HAL_OK) {
<> 149:156823d33999 86 error("Cannot initialize UART\n");
<> 149:156823d33999 87 }
<> 149:156823d33999 88 }
<> 149:156823d33999 89
<> 149:156823d33999 90 void serial_init(serial_t *obj, PinName tx, PinName rx)
<> 149:156823d33999 91 {
<> 149:156823d33999 92 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 93
<> 149:156823d33999 94 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 95 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
<> 149:156823d33999 96 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
<> 149:156823d33999 97
<> 149:156823d33999 98 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 99 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
<> 149:156823d33999 100 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 101
<> 149:156823d33999 102 // Enable USART clock
<> 149:156823d33999 103 if (obj_s->uart == UART_1) {
<> 149:156823d33999 104 __HAL_RCC_USART1_FORCE_RESET();
<> 149:156823d33999 105 __HAL_RCC_USART1_RELEASE_RESET();
<> 149:156823d33999 106 __HAL_RCC_USART1_CLK_ENABLE();
<> 149:156823d33999 107 obj_s->index = 0;
<> 149:156823d33999 108 }
<> 149:156823d33999 109 if (obj_s->uart == UART_2) {
<> 149:156823d33999 110 __HAL_RCC_USART2_FORCE_RESET();
<> 149:156823d33999 111 __HAL_RCC_USART2_RELEASE_RESET();
<> 149:156823d33999 112 __HAL_RCC_USART2_CLK_ENABLE();
<> 149:156823d33999 113 obj_s->index = 1;
<> 149:156823d33999 114 }
<> 149:156823d33999 115 if (obj_s->uart == UART_3) {
<> 149:156823d33999 116 __HAL_RCC_USART3_FORCE_RESET();
<> 149:156823d33999 117 __HAL_RCC_USART3_RELEASE_RESET();
<> 149:156823d33999 118 __HAL_RCC_USART3_CLK_ENABLE();
<> 149:156823d33999 119 obj_s->index = 2;
<> 149:156823d33999 120 }
<> 149:156823d33999 121 #if defined(UART4_BASE)
<> 149:156823d33999 122 if (obj_s->uart == UART_4) {
<> 149:156823d33999 123 __HAL_RCC_UART4_FORCE_RESET();
<> 149:156823d33999 124 __HAL_RCC_UART4_RELEASE_RESET();
<> 149:156823d33999 125 __HAL_RCC_UART4_CLK_ENABLE();
<> 149:156823d33999 126 obj_s->index = 3;
<> 149:156823d33999 127 }
<> 149:156823d33999 128 #endif
<> 149:156823d33999 129 #if defined(UART5_BASE)
<> 149:156823d33999 130 if (obj_s->uart == UART_5) {
<> 149:156823d33999 131 __HAL_RCC_UART5_FORCE_RESET();
<> 149:156823d33999 132 __HAL_RCC_UART5_RELEASE_RESET();
<> 149:156823d33999 133 __HAL_RCC_UART5_CLK_ENABLE();
<> 149:156823d33999 134 obj_s->index = 4;
<> 149:156823d33999 135 }
<> 149:156823d33999 136 #endif
<> 149:156823d33999 137
<> 149:156823d33999 138 // Configure UART pins
<> 149:156823d33999 139 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 140 pinmap_pinout(rx, PinMap_UART_RX);
<> 149:156823d33999 141
<> 149:156823d33999 142 if (tx != NC) {
<> 149:156823d33999 143 pin_mode(tx, PullUp);
<> 149:156823d33999 144 }
<> 149:156823d33999 145 if (rx != NC) {
<> 149:156823d33999 146 pin_mode(rx, PullUp);
<> 149:156823d33999 147 }
<> 149:156823d33999 148
<> 149:156823d33999 149 // Configure UART
<> 149:156823d33999 150 obj_s->baudrate = 9600;
<> 149:156823d33999 151 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 152 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 153 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 154
<> 149:156823d33999 155 #if DEVICE_SERIAL_FC
<> 149:156823d33999 156 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 157 #endif
<> 149:156823d33999 158
<> 149:156823d33999 159 obj_s->pin_tx = tx;
<> 149:156823d33999 160 obj_s->pin_rx = rx;
<> 149:156823d33999 161
<> 149:156823d33999 162 init_uart(obj);
<> 149:156823d33999 163
<> 149:156823d33999 164 // For stdio management
<> 149:156823d33999 165 if (obj_s->uart == STDIO_UART) {
<> 149:156823d33999 166 stdio_uart_inited = 1;
<> 149:156823d33999 167 memcpy(&stdio_uart, obj, sizeof(serial_t));
<> 149:156823d33999 168 }
<> 149:156823d33999 169 }
<> 149:156823d33999 170
<> 149:156823d33999 171 void serial_free(serial_t *obj)
<> 149:156823d33999 172 {
<> 149:156823d33999 173 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 174
<> 149:156823d33999 175 // Reset UART and disable clock
<> 149:156823d33999 176 if (obj_s->uart == UART_1) {
<> 149:156823d33999 177 __USART1_FORCE_RESET();
<> 149:156823d33999 178 __USART1_RELEASE_RESET();
<> 149:156823d33999 179 __USART1_CLK_DISABLE();
<> 149:156823d33999 180 }
<> 149:156823d33999 181 if (obj_s->uart == UART_2) {
<> 149:156823d33999 182 __USART2_FORCE_RESET();
<> 149:156823d33999 183 __USART2_RELEASE_RESET();
<> 149:156823d33999 184 __USART2_CLK_DISABLE();
<> 149:156823d33999 185 }
<> 149:156823d33999 186 if (obj_s->uart == UART_3) {
<> 149:156823d33999 187 __USART3_FORCE_RESET();
<> 149:156823d33999 188 __USART3_RELEASE_RESET();
<> 149:156823d33999 189 __USART3_CLK_DISABLE();
<> 149:156823d33999 190 }
<> 149:156823d33999 191
<> 149:156823d33999 192 #if defined(UART4_BASE)
<> 149:156823d33999 193 if (obj_s->uart == UART_4) {
<> 149:156823d33999 194 __UART4_FORCE_RESET();
<> 149:156823d33999 195 __UART4_RELEASE_RESET();
<> 149:156823d33999 196 __UART4_CLK_DISABLE();
<> 149:156823d33999 197 }
<> 149:156823d33999 198 #endif
<> 149:156823d33999 199 #if defined(UART5_BASE)
<> 149:156823d33999 200 if (obj_s->uart == UART_5) {
<> 149:156823d33999 201 __UART5_FORCE_RESET();
<> 149:156823d33999 202 __UART5_RELEASE_RESET();
<> 149:156823d33999 203 __UART5_CLK_DISABLE();
<> 149:156823d33999 204 }
<> 149:156823d33999 205 #endif
<> 149:156823d33999 206
<> 149:156823d33999 207 // Configure GPIOs
<> 149:156823d33999 208 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 209 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 210
<> 149:156823d33999 211 serial_irq_ids[obj_s->index] = 0;
<> 149:156823d33999 212 }
<> 149:156823d33999 213
<> 149:156823d33999 214 void serial_baud(serial_t *obj, int baudrate)
<> 149:156823d33999 215 {
<> 149:156823d33999 216 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 217
<> 149:156823d33999 218 obj_s->baudrate = baudrate;
<> 149:156823d33999 219 init_uart(obj);
<> 149:156823d33999 220 }
<> 149:156823d33999 221
<> 149:156823d33999 222 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
<> 149:156823d33999 223 {
<> 149:156823d33999 224 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 225
<> 149:156823d33999 226 if (data_bits == 9) {
<> 149:156823d33999 227 obj_s->databits = UART_WORDLENGTH_9B;
<> 149:156823d33999 228 } else {
<> 149:156823d33999 229 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 230 }
<> 149:156823d33999 231
<> 149:156823d33999 232 switch (parity) {
<> 149:156823d33999 233 case ParityOdd:
<> 149:156823d33999 234 obj_s->parity = UART_PARITY_ODD;
<> 149:156823d33999 235 break;
<> 149:156823d33999 236 case ParityEven:
<> 149:156823d33999 237 obj_s->parity = UART_PARITY_EVEN;
<> 149:156823d33999 238 break;
<> 149:156823d33999 239 default: // ParityNone
<> 149:156823d33999 240 case ParityForced0: // unsupported!
<> 149:156823d33999 241 case ParityForced1: // unsupported!
<> 149:156823d33999 242 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 243 break;
<> 149:156823d33999 244 }
<> 149:156823d33999 245
<> 149:156823d33999 246 if (stop_bits == 2) {
<> 149:156823d33999 247 obj_s->stopbits = UART_STOPBITS_2;
<> 149:156823d33999 248 } else {
<> 149:156823d33999 249 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 250 }
<> 149:156823d33999 251
<> 149:156823d33999 252 init_uart(obj);
<> 149:156823d33999 253 }
<> 149:156823d33999 254
<> 149:156823d33999 255 /******************************************************************************
<> 149:156823d33999 256 * INTERRUPTS HANDLING
<> 149:156823d33999 257 ******************************************************************************/
<> 149:156823d33999 258
<> 149:156823d33999 259 static void uart_irq(int id)
<> 149:156823d33999 260 {
<> 149:156823d33999 261 UART_HandleTypeDef * huart = &uart_handlers[id];
<> 149:156823d33999 262
<> 149:156823d33999 263 if (serial_irq_ids[id] != 0) {
<> 149:156823d33999 264 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 265 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 266 irq_handler(serial_irq_ids[id], TxIrq);
<> 149:156823d33999 267 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 268 }
<> 149:156823d33999 269 }
<> 149:156823d33999 270 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
<> 149:156823d33999 271 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
<> 149:156823d33999 272 irq_handler(serial_irq_ids[id], RxIrq);
<> 149:156823d33999 273 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 274 }
<> 149:156823d33999 275 }
<> 149:156823d33999 276 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 277 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
<> 149:156823d33999 278 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
<> 149:156823d33999 279 }
<> 149:156823d33999 280 }
<> 149:156823d33999 281 }
<> 149:156823d33999 282 }
<> 149:156823d33999 283
<> 149:156823d33999 284 static void uart1_irq(void)
<> 149:156823d33999 285 {
<> 149:156823d33999 286 uart_irq(0);
<> 149:156823d33999 287 }
<> 149:156823d33999 288
<> 149:156823d33999 289 static void uart2_irq(void)
<> 149:156823d33999 290 {
<> 149:156823d33999 291 uart_irq(1);
<> 149:156823d33999 292 }
<> 149:156823d33999 293
<> 149:156823d33999 294 static void uart3_irq(void)
<> 149:156823d33999 295 {
<> 149:156823d33999 296 uart_irq(2);
<> 149:156823d33999 297 }
<> 149:156823d33999 298
<> 149:156823d33999 299 #if defined(UART4_BASE)
<> 149:156823d33999 300 static void uart4_irq(void)
<> 149:156823d33999 301 {
<> 149:156823d33999 302 uart_irq(3);
<> 149:156823d33999 303 }
<> 149:156823d33999 304 #endif
<> 149:156823d33999 305 #if defined(UART5_BASE)
<> 149:156823d33999 306 static void uart5_irq(void)
<> 149:156823d33999 307 {
<> 149:156823d33999 308 uart_irq(4);
<> 149:156823d33999 309 }
<> 149:156823d33999 310 #endif
<> 149:156823d33999 311
<> 149:156823d33999 312 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
<> 149:156823d33999 313 {
<> 149:156823d33999 314 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 315
<> 149:156823d33999 316 irq_handler = handler;
<> 149:156823d33999 317 serial_irq_ids[obj_s->index] = id;
<> 149:156823d33999 318 }
<> 149:156823d33999 319
<> 149:156823d33999 320 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
<> 149:156823d33999 321 {
<> 149:156823d33999 322 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 323 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 324 IRQn_Type irq_n = (IRQn_Type)0;
<> 149:156823d33999 325 uint32_t vector = 0;
<> 149:156823d33999 326
<> 149:156823d33999 327 if (obj_s->uart == UART_1) {
<> 149:156823d33999 328 irq_n = USART1_IRQn;
<> 149:156823d33999 329 vector = (uint32_t)&uart1_irq;
<> 149:156823d33999 330 }
<> 149:156823d33999 331
<> 149:156823d33999 332 if (obj_s->uart == UART_2) {
<> 149:156823d33999 333 irq_n = USART2_IRQn;
<> 149:156823d33999 334 vector = (uint32_t)&uart2_irq;
<> 149:156823d33999 335 }
<> 149:156823d33999 336
<> 149:156823d33999 337 if (obj_s->uart == UART_3) {
<> 149:156823d33999 338 irq_n = USART3_IRQn;
<> 149:156823d33999 339 vector = (uint32_t)&uart3_irq;
<> 149:156823d33999 340 }
<> 149:156823d33999 341 #if defined(UART4_BASE)
<> 149:156823d33999 342 if (obj_s->uart == UART_4) {
<> 149:156823d33999 343 irq_n = UART4_IRQn;
<> 149:156823d33999 344 vector = (uint32_t)&uart4_irq;
<> 149:156823d33999 345 }
<> 149:156823d33999 346 #endif
<> 149:156823d33999 347 #if defined(UART5_BASE)
<> 149:156823d33999 348 if (obj_s->uart == UART_5) {
<> 149:156823d33999 349 irq_n = UART5_IRQn;
<> 149:156823d33999 350 vector = (uint32_t)&uart5_irq;
<> 149:156823d33999 351 }
<> 149:156823d33999 352 #endif
<> 149:156823d33999 353
<> 149:156823d33999 354 if (enable) {
<> 149:156823d33999 355 if (irq == RxIrq) {
<> 149:156823d33999 356 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 357 } else { // TxIrq
<> 149:156823d33999 358 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 359 }
<> 149:156823d33999 360 NVIC_SetVector(irq_n, vector);
<> 149:156823d33999 361 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 362
<> 149:156823d33999 363 } else { // disable
<> 149:156823d33999 364 int all_disabled = 0;
<> 149:156823d33999 365 if (irq == RxIrq) {
<> 149:156823d33999 366 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 367 // Check if TxIrq is disabled too
<> 149:156823d33999 368 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
<> 149:156823d33999 369 all_disabled = 1;
<> 149:156823d33999 370 }
<> 149:156823d33999 371 } else { // TxIrq
<> 149:156823d33999 372 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 373 // Check if RxIrq is disabled too
<> 149:156823d33999 374 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
<> 149:156823d33999 375 all_disabled = 1;
<> 149:156823d33999 376 }
<> 149:156823d33999 377 }
<> 149:156823d33999 378
<> 149:156823d33999 379 if (all_disabled) {
<> 149:156823d33999 380 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 381 }
<> 149:156823d33999 382 }
<> 149:156823d33999 383 }
<> 149:156823d33999 384
<> 149:156823d33999 385 /******************************************************************************
<> 149:156823d33999 386 * READ/WRITE
<> 149:156823d33999 387 ******************************************************************************/
<> 149:156823d33999 388
<> 149:156823d33999 389 int serial_getc(serial_t *obj)
<> 149:156823d33999 390 {
<> 149:156823d33999 391 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 392 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 393
<> 149:156823d33999 394 while (!serial_readable(obj));
<> 149:156823d33999 395 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 396 return (int)(huart->Instance->DR & (uint8_t)0xFF);
<> 149:156823d33999 397 } else {
<> 149:156823d33999 398 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
<> 149:156823d33999 399 }
<> 149:156823d33999 400 }
<> 149:156823d33999 401
<> 149:156823d33999 402 void serial_putc(serial_t *obj, int c)
<> 149:156823d33999 403 {
<> 149:156823d33999 404 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 405 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 406
<> 149:156823d33999 407 while (!serial_writable(obj));
<> 149:156823d33999 408 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 409 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
<> 149:156823d33999 410 } else {
<> 149:156823d33999 411 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
<> 149:156823d33999 412 }
<> 149:156823d33999 413 }
<> 149:156823d33999 414
<> 149:156823d33999 415 int serial_readable(serial_t *obj)
<> 149:156823d33999 416 {
<> 149:156823d33999 417 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 418 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 419
<> 149:156823d33999 420 // Check if data is received
<> 149:156823d33999 421 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
<> 149:156823d33999 422 }
<> 149:156823d33999 423
<> 149:156823d33999 424 int serial_writable(serial_t *obj)
<> 149:156823d33999 425 {
<> 149:156823d33999 426 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 427 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 428
<> 149:156823d33999 429 // Check if data is transmitted
<> 149:156823d33999 430 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
<> 149:156823d33999 431 }
<> 149:156823d33999 432
<> 149:156823d33999 433 void serial_clear(serial_t *obj)
<> 149:156823d33999 434 {
<> 149:156823d33999 435 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 436 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 437
<> 149:156823d33999 438 huart->TxXferCount = 0;
<> 149:156823d33999 439 huart->RxXferCount = 0;
<> 149:156823d33999 440 }
<> 149:156823d33999 441
<> 149:156823d33999 442 void serial_pinout_tx(PinName tx)
<> 149:156823d33999 443 {
<> 149:156823d33999 444 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 445 }
<> 149:156823d33999 446
<> 149:156823d33999 447 void serial_break_set(serial_t *obj)
<> 149:156823d33999 448 {
<> 149:156823d33999 449 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 450 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 451
<> 149:156823d33999 452 HAL_LIN_SendBreak(huart);
<> 149:156823d33999 453 }
<> 149:156823d33999 454
<> 149:156823d33999 455 void serial_break_clear(serial_t *obj)
<> 149:156823d33999 456 {
<> 149:156823d33999 457 (void)obj;
<> 149:156823d33999 458 }
<> 149:156823d33999 459
<> 149:156823d33999 460 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 461
<> 149:156823d33999 462 /******************************************************************************
<> 149:156823d33999 463 * LOCAL HELPER FUNCTIONS
<> 149:156823d33999 464 ******************************************************************************/
<> 149:156823d33999 465
<> 149:156823d33999 466 /**
<> 149:156823d33999 467 * Configure the TX buffer for an asynchronous write serial transaction
<> 149:156823d33999 468 *
<> 149:156823d33999 469 * @param obj The serial object.
<> 149:156823d33999 470 * @param tx The buffer for sending.
<> 149:156823d33999 471 * @param tx_length The number of words to transmit.
<> 149:156823d33999 472 */
<> 149:156823d33999 473 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
<> 149:156823d33999 474 {
<> 149:156823d33999 475 (void)width;
<> 149:156823d33999 476
<> 149:156823d33999 477 // Exit if a transmit is already on-going
<> 149:156823d33999 478 if (serial_tx_active(obj)) {
<> 149:156823d33999 479 return;
<> 149:156823d33999 480 }
<> 149:156823d33999 481
<> 149:156823d33999 482 obj->tx_buff.buffer = tx;
<> 149:156823d33999 483 obj->tx_buff.length = tx_length;
<> 149:156823d33999 484 obj->tx_buff.pos = 0;
<> 149:156823d33999 485 }
<> 149:156823d33999 486
<> 149:156823d33999 487 /**
<> 149:156823d33999 488 * Configure the RX buffer for an asynchronous write serial transaction
<> 149:156823d33999 489 *
<> 149:156823d33999 490 * @param obj The serial object.
<> 149:156823d33999 491 * @param tx The buffer for sending.
<> 149:156823d33999 492 * @param tx_length The number of words to transmit.
<> 149:156823d33999 493 */
<> 149:156823d33999 494 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
<> 149:156823d33999 495 {
<> 149:156823d33999 496 (void)width;
<> 149:156823d33999 497
<> 149:156823d33999 498 // Exit if a reception is already on-going
<> 149:156823d33999 499 if (serial_rx_active(obj)) {
<> 149:156823d33999 500 return;
<> 149:156823d33999 501 }
<> 149:156823d33999 502
<> 149:156823d33999 503 obj->rx_buff.buffer = rx;
<> 149:156823d33999 504 obj->rx_buff.length = rx_length;
<> 149:156823d33999 505 obj->rx_buff.pos = 0;
<> 149:156823d33999 506 }
<> 149:156823d33999 507
<> 149:156823d33999 508 /**
<> 149:156823d33999 509 * Configure events
<> 149:156823d33999 510 *
<> 149:156823d33999 511 * @param obj The serial object
<> 149:156823d33999 512 * @param event The logical OR of the events to configure
<> 149:156823d33999 513 * @param enable Set to non-zero to enable events, or zero to disable them
<> 149:156823d33999 514 */
<> 149:156823d33999 515 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
<> 149:156823d33999 516 {
<> 149:156823d33999 517 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 518
<> 149:156823d33999 519 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
<> 149:156823d33999 520 if (enable) {
<> 149:156823d33999 521 obj_s->events |= event;
<> 149:156823d33999 522 } else {
<> 149:156823d33999 523 obj_s->events &= ~event;
<> 149:156823d33999 524 }
<> 149:156823d33999 525 }
<> 149:156823d33999 526
<> 149:156823d33999 527
<> 149:156823d33999 528 /**
<> 149:156823d33999 529 * Get index of serial object TX IRQ, relating it to the physical peripheral.
<> 149:156823d33999 530 *
<> 149:156823d33999 531 * @param obj pointer to serial object
<> 149:156823d33999 532 * @return internal NVIC TX IRQ index of U(S)ART peripheral
<> 149:156823d33999 533 */
<> 149:156823d33999 534 static IRQn_Type serial_get_irq_n(serial_t *obj)
<> 149:156823d33999 535 {
<> 149:156823d33999 536 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 537 IRQn_Type irq_n;
<> 149:156823d33999 538
<> 149:156823d33999 539 switch (obj_s->index) {
<> 149:156823d33999 540 case 0:
<> 149:156823d33999 541 irq_n = USART1_IRQn;
<> 149:156823d33999 542 break;
<> 149:156823d33999 543
<> 149:156823d33999 544 case 1:
<> 149:156823d33999 545 irq_n = USART2_IRQn;
<> 149:156823d33999 546 break;
<> 149:156823d33999 547
<> 149:156823d33999 548 case 2:
<> 149:156823d33999 549 irq_n = USART3_IRQn;
<> 149:156823d33999 550 break;
<> 149:156823d33999 551 #if defined(UART4_BASE)
<> 149:156823d33999 552 case 3:
<> 149:156823d33999 553 irq_n = UART4_IRQn;
<> 149:156823d33999 554 break;
<> 149:156823d33999 555 #endif
<> 149:156823d33999 556 #if defined(UART5_BASE)
<> 149:156823d33999 557 case 4:
<> 149:156823d33999 558 irq_n = UART5_IRQn;
<> 149:156823d33999 559 break;
<> 149:156823d33999 560 #endif
<> 149:156823d33999 561 default:
<> 149:156823d33999 562 irq_n = (IRQn_Type)0;
<> 149:156823d33999 563 }
<> 149:156823d33999 564
<> 149:156823d33999 565 return irq_n;
<> 149:156823d33999 566 }
<> 149:156823d33999 567
<> 149:156823d33999 568 /******************************************************************************
<> 149:156823d33999 569 * MBED API FUNCTIONS
<> 149:156823d33999 570 ******************************************************************************/
<> 149:156823d33999 571
<> 149:156823d33999 572 /**
<> 149:156823d33999 573 * Begin asynchronous TX transfer. The used buffer is specified in the serial
<> 149:156823d33999 574 * object, tx_buff
<> 149:156823d33999 575 *
<> 149:156823d33999 576 * @param obj The serial object
<> 149:156823d33999 577 * @param tx The buffer for sending
<> 149:156823d33999 578 * @param tx_length The number of words to transmit
<> 149:156823d33999 579 * @param tx_width The bit width of buffer word
<> 149:156823d33999 580 * @param handler The serial handler
<> 149:156823d33999 581 * @param event The logical OR of events to be registered
<> 149:156823d33999 582 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 583 * @return Returns number of data transfered, or 0 otherwise
<> 149:156823d33999 584 */
<> 149:156823d33999 585 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)
<> 149:156823d33999 586 {
<> 149:156823d33999 587 // TODO: DMA usage is currently ignored
<> 149:156823d33999 588 (void) hint;
<> 149:156823d33999 589
<> 149:156823d33999 590 // Check buffer is ok
<> 149:156823d33999 591 MBED_ASSERT(tx != (void*)0);
<> 149:156823d33999 592 MBED_ASSERT(tx_width == 8); // support only 8b width
<> 149:156823d33999 593
<> 149:156823d33999 594 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 595 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 596
<> 149:156823d33999 597 if (tx_length == 0) {
<> 149:156823d33999 598 return 0;
<> 149:156823d33999 599 }
<> 149:156823d33999 600
<> 149:156823d33999 601 // Set up buffer
<> 149:156823d33999 602 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
<> 149:156823d33999 603
<> 149:156823d33999 604 // Set up events
<> 149:156823d33999 605 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
<> 149:156823d33999 606 serial_enable_event(obj, event, 1); // Set only the wanted events
<> 149:156823d33999 607
<> 149:156823d33999 608 // Enable interrupt
<> 149:156823d33999 609 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 610 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 611 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 612 NVIC_SetPriority(irq_n, 1);
<> 149:156823d33999 613 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 614 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 615
<> 149:156823d33999 616 // the following function will enable UART_IT_TXE and error interrupts
<> 149:156823d33999 617 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
<> 149:156823d33999 618 return 0;
<> 149:156823d33999 619 }
<> 149:156823d33999 620
<> 149:156823d33999 621 return tx_length;
<> 149:156823d33999 622 }
<> 149:156823d33999 623
<> 149:156823d33999 624 /**
<> 149:156823d33999 625 * Begin asynchronous RX transfer (enable interrupt for data collecting)
<> 149:156823d33999 626 * The used buffer is specified in the serial object, rx_buff
<> 149:156823d33999 627 *
<> 149:156823d33999 628 * @param obj The serial object
<> 149:156823d33999 629 * @param rx The buffer for sending
<> 149:156823d33999 630 * @param rx_length The number of words to transmit
<> 149:156823d33999 631 * @param rx_width The bit width of buffer word
<> 149:156823d33999 632 * @param handler The serial handler
<> 149:156823d33999 633 * @param event The logical OR of events to be registered
<> 149:156823d33999 634 * @param handler The serial handler
<> 149:156823d33999 635 * @param char_match A character in range 0-254 to be matched
<> 149:156823d33999 636 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 637 */
<> 149:156823d33999 638 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)
<> 149:156823d33999 639 {
<> 149:156823d33999 640 // TODO: DMA usage is currently ignored
<> 149:156823d33999 641 (void) hint;
<> 149:156823d33999 642
<> 149:156823d33999 643 /* Sanity check arguments */
<> 149:156823d33999 644 MBED_ASSERT(obj);
<> 149:156823d33999 645 MBED_ASSERT(rx != (void*)0);
<> 149:156823d33999 646 MBED_ASSERT(rx_width == 8); // support only 8b width
<> 149:156823d33999 647
<> 149:156823d33999 648 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 649 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 650
<> 149:156823d33999 651 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
<> 149:156823d33999 652 serial_enable_event(obj, event, 1);
<> 149:156823d33999 653
<> 149:156823d33999 654 // set CharMatch
<> 149:156823d33999 655 obj->char_match = char_match;
<> 149:156823d33999 656
<> 149:156823d33999 657 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
<> 149:156823d33999 658
<> 149:156823d33999 659 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 660 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 661 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 662 NVIC_SetPriority(irq_n, 0);
<> 149:156823d33999 663 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 664 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 665
<> 149:156823d33999 666 // following HAL function will enable the RXNE interrupt + error interrupts
<> 149:156823d33999 667 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
<> 149:156823d33999 668 }
<> 149:156823d33999 669
<> 149:156823d33999 670 /**
<> 149:156823d33999 671 * Attempts to determine if the serial peripheral is already in use for TX
<> 149:156823d33999 672 *
<> 149:156823d33999 673 * @param obj The serial object
<> 149:156823d33999 674 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
<> 149:156823d33999 675 */
<> 149:156823d33999 676 uint8_t serial_tx_active(serial_t *obj)
<> 149:156823d33999 677 {
<> 149:156823d33999 678 MBED_ASSERT(obj);
<> 149:156823d33999 679
<> 149:156823d33999 680 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 681 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 682
<> 149:156823d33999 683 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
<> 149:156823d33999 684 }
<> 149:156823d33999 685
<> 149:156823d33999 686 /**
<> 149:156823d33999 687 * Attempts to determine if the serial peripheral is already in use for RX
<> 149:156823d33999 688 *
<> 149:156823d33999 689 * @param obj The serial object
<> 149:156823d33999 690 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
<> 149:156823d33999 691 */
<> 149:156823d33999 692 uint8_t serial_rx_active(serial_t *obj)
<> 149:156823d33999 693 {
<> 149:156823d33999 694 MBED_ASSERT(obj);
<> 149:156823d33999 695
<> 149:156823d33999 696 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 697 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 698
<> 149:156823d33999 699 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
<> 149:156823d33999 700 }
<> 149:156823d33999 701
<> 149:156823d33999 702 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 703 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 704 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 705 }
<> 149:156823d33999 706 }
<> 149:156823d33999 707
<> 149:156823d33999 708 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 709 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 710 volatile uint32_t tmpval = huart->Instance->DR; // Clear PE flag
<> 149:156823d33999 711 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 712 volatile uint32_t tmpval = huart->Instance->DR; // Clear FE flag
<> 149:156823d33999 713 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
<> 149:156823d33999 714 volatile uint32_t tmpval = huart->Instance->DR; // Clear NE flag
<> 149:156823d33999 715 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 716 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
<> 149:156823d33999 717 }
<> 149:156823d33999 718 }
<> 149:156823d33999 719
<> 149:156823d33999 720 /**
<> 149:156823d33999 721 * The asynchronous TX and RX handler.
<> 149:156823d33999 722 *
<> 149:156823d33999 723 * @param obj The serial object
<> 149:156823d33999 724 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
<> 149:156823d33999 725 */
<> 149:156823d33999 726 int serial_irq_handler_asynch(serial_t *obj)
<> 149:156823d33999 727 {
<> 149:156823d33999 728 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 729 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 730
<> 149:156823d33999 731 volatile int return_event = 0;
<> 149:156823d33999 732 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
<> 149:156823d33999 733 uint8_t i = 0;
<> 149:156823d33999 734
<> 149:156823d33999 735 // TX PART:
<> 149:156823d33999 736 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 737 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 738 // Return event SERIAL_EVENT_TX_COMPLETE if requested
<> 149:156823d33999 739 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
<> 149:156823d33999 740 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
<> 149:156823d33999 741 }
<> 149:156823d33999 742 }
<> 149:156823d33999 743 }
<> 149:156823d33999 744
<> 149:156823d33999 745 // Handle error events
<> 149:156823d33999 746 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 747 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 748 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
<> 149:156823d33999 749 }
<> 149:156823d33999 750 }
<> 149:156823d33999 751
<> 149:156823d33999 752 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 753 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 754 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
<> 149:156823d33999 755 }
<> 149:156823d33999 756 }
<> 149:156823d33999 757
<> 149:156823d33999 758 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 759 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 760 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
<> 149:156823d33999 761 }
<> 149:156823d33999 762 }
<> 149:156823d33999 763
<> 149:156823d33999 764 HAL_UART_IRQHandler(huart);
<> 149:156823d33999 765
<> 149:156823d33999 766 // Abort if an error occurs
<> 149:156823d33999 767 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
<> 149:156823d33999 768 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
<> 149:156823d33999 769 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
<> 149:156823d33999 770 return return_event;
<> 149:156823d33999 771 }
<> 149:156823d33999 772
<> 149:156823d33999 773 //RX PART
<> 149:156823d33999 774 if (huart->RxXferSize != 0) {
<> 149:156823d33999 775 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
<> 149:156823d33999 776 }
<> 149:156823d33999 777 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
<> 149:156823d33999 778 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
<> 149:156823d33999 779 }
<> 149:156823d33999 780
<> 149:156823d33999 781 // Check if char_match is present
<> 149:156823d33999 782 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
<> 149:156823d33999 783 if (buf != NULL) {
<> 149:156823d33999 784 for (i = 0; i < obj->rx_buff.pos; i++) {
<> 149:156823d33999 785 if (buf[i] == obj->char_match) {
<> 149:156823d33999 786 obj->rx_buff.pos = i;
<> 149:156823d33999 787 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
<> 149:156823d33999 788 serial_rx_abort_asynch(obj);
<> 149:156823d33999 789 break;
<> 149:156823d33999 790 }
<> 149:156823d33999 791 }
<> 149:156823d33999 792 }
<> 149:156823d33999 793 }
<> 149:156823d33999 794
<> 149:156823d33999 795 return return_event;
<> 149:156823d33999 796 }
<> 149:156823d33999 797
<> 149:156823d33999 798 /**
<> 149:156823d33999 799 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
<> 149:156823d33999 800 * flush TX hardware buffer if TX FIFO is used
<> 149:156823d33999 801 *
<> 149:156823d33999 802 * @param obj The serial object
<> 149:156823d33999 803 */
<> 149:156823d33999 804 void serial_tx_abort_asynch(serial_t *obj)
<> 149:156823d33999 805 {
<> 149:156823d33999 806 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 807 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 808
<> 149:156823d33999 809 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 810 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
<> 149:156823d33999 811
<> 149:156823d33999 812 // clear flags
<> 149:156823d33999 813 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 814
<> 149:156823d33999 815 // reset states
<> 149:156823d33999 816 huart->TxXferCount = 0;
<> 149:156823d33999 817 // update handle state
<> 149:156823d33999 818 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 819 huart->State = HAL_UART_STATE_BUSY_RX;
<> 149:156823d33999 820 } else {
<> 149:156823d33999 821 huart->State = HAL_UART_STATE_READY;
<> 149:156823d33999 822 }
<> 149:156823d33999 823 }
<> 149:156823d33999 824
<> 149:156823d33999 825 /**
<> 149:156823d33999 826 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
<> 149:156823d33999 827 * flush RX hardware buffer if RX FIFO is used
<> 149:156823d33999 828 *
<> 149:156823d33999 829 * @param obj The serial object
<> 149:156823d33999 830 */
<> 149:156823d33999 831 void serial_rx_abort_asynch(serial_t *obj)
<> 149:156823d33999 832 {
<> 149:156823d33999 833 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 834 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 835
<> 149:156823d33999 836 // disable interrupts
<> 149:156823d33999 837 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 838 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
<> 149:156823d33999 839 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
<> 149:156823d33999 840
<> 149:156823d33999 841 // clear flags
<> 149:156823d33999 842 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 843 volatile uint32_t tmpval = huart->Instance->DR; // Clear errors flag
<> 149:156823d33999 844
<> 149:156823d33999 845 // reset states
<> 149:156823d33999 846 huart->RxXferCount = 0;
<> 149:156823d33999 847 // update handle state
<> 149:156823d33999 848 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 849 huart->State = HAL_UART_STATE_BUSY_TX;
<> 149:156823d33999 850 } else {
<> 149:156823d33999 851 huart->State = HAL_UART_STATE_READY;
<> 149:156823d33999 852 }
<> 149:156823d33999 853 }
<> 149:156823d33999 854
<> 149:156823d33999 855 #endif
<> 149:156823d33999 856
<> 149:156823d33999 857 #if DEVICE_SERIAL_FC
<> 149:156823d33999 858
<> 149:156823d33999 859 /**
<> 149:156823d33999 860 * Set HW Control Flow
<> 149:156823d33999 861 * @param obj The serial object
<> 149:156823d33999 862 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
<> 149:156823d33999 863 * @param rxflow Pin for the rxflow
<> 149:156823d33999 864 * @param txflow Pin for the txflow
<> 149:156823d33999 865 */
<> 149:156823d33999 866 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
<> 149:156823d33999 867 {
<> 149:156823d33999 868 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 869
<> 149:156823d33999 870 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 871 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 872 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
<> 149:156823d33999 873
<> 149:156823d33999 874 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 875 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
<> 149:156823d33999 876 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 877
<> 149:156823d33999 878 if(type == FlowControlNone) {
<> 149:156823d33999 879 // Disable hardware flow control
<> 149:156823d33999 880 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 881 }
<> 149:156823d33999 882 if (type == FlowControlRTS) {
<> 149:156823d33999 883 // Enable RTS
<> 149:156823d33999 884 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 885 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
<> 149:156823d33999 886 obj_s->pin_rts = rxflow;
<> 149:156823d33999 887 // Enable the pin for RTS function
<> 149:156823d33999 888 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 889 }
<> 149:156823d33999 890 if (type == FlowControlCTS) {
<> 149:156823d33999 891 // Enable CTS
<> 149:156823d33999 892 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 893 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
<> 149:156823d33999 894 obj_s->pin_cts = txflow;
<> 149:156823d33999 895 // Enable the pin for CTS function
<> 149:156823d33999 896 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 897 }
<> 149:156823d33999 898 if (type == FlowControlRTSCTS) {
<> 149:156823d33999 899 // Enable CTS & RTS
<> 149:156823d33999 900 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 901 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 902 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
<> 149:156823d33999 903 obj_s->pin_rts = rxflow;
<> 149:156823d33999 904 obj_s->pin_cts = txflow;
<> 149:156823d33999 905 // Enable the pin for CTS function
<> 149:156823d33999 906 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 907 // Enable the pin for RTS function
<> 149:156823d33999 908 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 909 }
<> 149:156823d33999 910
<> 149:156823d33999 911 init_uart(obj);
<> 149:156823d33999 912 }
<> 149:156823d33999 913
<> 149:156823d33999 914 #endif
<> 149:156823d33999 915
<> 149:156823d33999 916 #endif