Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

targets/TARGET_STM/TARGET_STM32F1/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 (3)
<> 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
<> 149:156823d33999 122 // Configure UART pins
<> 149:156823d33999 123 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 124 pinmap_pinout(rx, PinMap_UART_RX);
<> 149:156823d33999 125
<> 149:156823d33999 126 if (tx != NC) {
<> 149:156823d33999 127 pin_mode(tx, PullUp);
<> 149:156823d33999 128 }
<> 149:156823d33999 129 if (rx != NC) {
<> 149:156823d33999 130 pin_mode(rx, PullUp);
<> 149:156823d33999 131 }
<> 149:156823d33999 132
<> 149:156823d33999 133 // Configure UART
<> 149:156823d33999 134 obj_s->baudrate = 9600;
<> 149:156823d33999 135 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 136 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 137 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 138
<> 149:156823d33999 139 #if DEVICE_SERIAL_FC
<> 149:156823d33999 140 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 141 #endif
<> 149:156823d33999 142
<> 149:156823d33999 143 obj_s->pin_tx = tx;
<> 149:156823d33999 144 obj_s->pin_rx = rx;
<> 149:156823d33999 145
<> 149:156823d33999 146 init_uart(obj);
<> 149:156823d33999 147
<> 149:156823d33999 148 // For stdio management
<> 149:156823d33999 149 if (obj_s->uart == STDIO_UART) {
<> 149:156823d33999 150 stdio_uart_inited = 1;
<> 149:156823d33999 151 memcpy(&stdio_uart, obj, sizeof(serial_t));
<> 149:156823d33999 152 }
<> 149:156823d33999 153 }
<> 149:156823d33999 154
<> 149:156823d33999 155 void serial_free(serial_t *obj)
<> 149:156823d33999 156 {
<> 149:156823d33999 157 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 158
<> 149:156823d33999 159 // Reset UART and disable clock
<> 149:156823d33999 160 if (obj_s->uart == UART_1) {
<> 149:156823d33999 161 __USART1_FORCE_RESET();
<> 149:156823d33999 162 __USART1_RELEASE_RESET();
<> 149:156823d33999 163 __USART1_CLK_DISABLE();
<> 149:156823d33999 164 }
<> 149:156823d33999 165 if (obj_s->uart == UART_2) {
<> 149:156823d33999 166 __USART2_FORCE_RESET();
<> 149:156823d33999 167 __USART2_RELEASE_RESET();
<> 149:156823d33999 168 __USART2_CLK_DISABLE();
<> 149:156823d33999 169 }
<> 149:156823d33999 170 if (obj_s->uart == UART_3) {
<> 149:156823d33999 171 __USART3_FORCE_RESET();
<> 149:156823d33999 172 __USART3_RELEASE_RESET();
<> 149:156823d33999 173 __USART3_CLK_DISABLE();
<> 149:156823d33999 174 }
<> 149:156823d33999 175
<> 149:156823d33999 176 // Configure GPIOs
<> 149:156823d33999 177 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 178 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 179
<> 149:156823d33999 180 serial_irq_ids[obj_s->index] = 0;
<> 149:156823d33999 181 }
<> 149:156823d33999 182
<> 149:156823d33999 183 void serial_baud(serial_t *obj, int baudrate)
<> 149:156823d33999 184 {
<> 149:156823d33999 185 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 186
<> 149:156823d33999 187 obj_s->baudrate = baudrate;
<> 149:156823d33999 188 init_uart(obj);
<> 149:156823d33999 189 }
<> 149:156823d33999 190
<> 149:156823d33999 191 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
<> 149:156823d33999 192 {
<> 149:156823d33999 193 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 194
<> 149:156823d33999 195 if (data_bits == 9) {
<> 149:156823d33999 196 obj_s->databits = UART_WORDLENGTH_9B;
<> 149:156823d33999 197 } else {
<> 149:156823d33999 198 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 199 }
<> 149:156823d33999 200
<> 149:156823d33999 201 switch (parity) {
<> 149:156823d33999 202 case ParityOdd:
<> 149:156823d33999 203 obj_s->parity = UART_PARITY_ODD;
<> 149:156823d33999 204 break;
<> 149:156823d33999 205 case ParityEven:
<> 149:156823d33999 206 obj_s->parity = UART_PARITY_EVEN;
<> 149:156823d33999 207 break;
<> 149:156823d33999 208 default: // ParityNone
<> 149:156823d33999 209 case ParityForced0: // unsupported!
<> 149:156823d33999 210 case ParityForced1: // unsupported!
<> 149:156823d33999 211 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 212 break;
<> 149:156823d33999 213 }
<> 149:156823d33999 214
<> 149:156823d33999 215 if (stop_bits == 2) {
<> 149:156823d33999 216 obj_s->stopbits = UART_STOPBITS_2;
<> 149:156823d33999 217 } else {
<> 149:156823d33999 218 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 219 }
<> 149:156823d33999 220
<> 149:156823d33999 221 init_uart(obj);
<> 149:156823d33999 222 }
<> 149:156823d33999 223
<> 149:156823d33999 224 /******************************************************************************
<> 149:156823d33999 225 * INTERRUPTS HANDLING
<> 149:156823d33999 226 ******************************************************************************/
<> 149:156823d33999 227
<> 149:156823d33999 228 static void uart_irq(int id)
<> 149:156823d33999 229 {
<> 149:156823d33999 230 UART_HandleTypeDef * huart = &uart_handlers[id];
<> 149:156823d33999 231
<> 149:156823d33999 232 if (serial_irq_ids[id] != 0) {
<> 149:156823d33999 233 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 234 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 235 irq_handler(serial_irq_ids[id], TxIrq);
<> 149:156823d33999 236 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 237 }
<> 149:156823d33999 238 }
<> 149:156823d33999 239 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
<> 149:156823d33999 240 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
<> 149:156823d33999 241 irq_handler(serial_irq_ids[id], RxIrq);
<> 149:156823d33999 242 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 243 }
<> 149:156823d33999 244 }
<> 149:156823d33999 245 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 246 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
<> 149:156823d33999 247 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
<> 149:156823d33999 248 }
<> 149:156823d33999 249 }
<> 149:156823d33999 250 }
<> 149:156823d33999 251 }
<> 149:156823d33999 252
<> 149:156823d33999 253 static void uart1_irq(void)
<> 149:156823d33999 254 {
<> 149:156823d33999 255 uart_irq(0);
<> 149:156823d33999 256 }
<> 149:156823d33999 257
<> 149:156823d33999 258 static void uart2_irq(void)
<> 149:156823d33999 259 {
<> 149:156823d33999 260 uart_irq(1);
<> 149:156823d33999 261 }
<> 149:156823d33999 262
<> 149:156823d33999 263 static void uart3_irq(void)
<> 149:156823d33999 264 {
<> 149:156823d33999 265 uart_irq(2);
<> 149:156823d33999 266 }
<> 149:156823d33999 267
<> 149:156823d33999 268 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
<> 149:156823d33999 269 {
<> 149:156823d33999 270 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 271
<> 149:156823d33999 272 irq_handler = handler;
<> 149:156823d33999 273 serial_irq_ids[obj_s->index] = id;
<> 149:156823d33999 274 }
<> 149:156823d33999 275
<> 149:156823d33999 276 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
<> 149:156823d33999 277 {
<> 149:156823d33999 278 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 279 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 280 IRQn_Type irq_n = (IRQn_Type)0;
<> 149:156823d33999 281 uint32_t vector = 0;
<> 149:156823d33999 282
<> 149:156823d33999 283 if (obj_s->uart == UART_1) {
<> 149:156823d33999 284 irq_n = USART1_IRQn;
<> 149:156823d33999 285 vector = (uint32_t)&uart1_irq;
<> 149:156823d33999 286 }
<> 149:156823d33999 287
<> 149:156823d33999 288 if (obj_s->uart == UART_2) {
<> 149:156823d33999 289 irq_n = USART2_IRQn;
<> 149:156823d33999 290 vector = (uint32_t)&uart2_irq;
<> 149:156823d33999 291 }
<> 149:156823d33999 292
<> 149:156823d33999 293 if (obj_s->uart == UART_3) {
<> 149:156823d33999 294 irq_n = USART3_IRQn;
<> 149:156823d33999 295 vector = (uint32_t)&uart3_irq;
<> 149:156823d33999 296 }
<> 149:156823d33999 297
<> 149:156823d33999 298 if (enable) {
<> 149:156823d33999 299 if (irq == RxIrq) {
<> 149:156823d33999 300 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 301 } else { // TxIrq
<> 149:156823d33999 302 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 303 }
<> 149:156823d33999 304 NVIC_SetVector(irq_n, vector);
<> 149:156823d33999 305 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 306
<> 149:156823d33999 307 } else { // disable
<> 149:156823d33999 308 int all_disabled = 0;
<> 149:156823d33999 309 if (irq == RxIrq) {
<> 149:156823d33999 310 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 311 // Check if TxIrq is disabled too
<> 149:156823d33999 312 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
<> 149:156823d33999 313 all_disabled = 1;
<> 149:156823d33999 314 }
<> 149:156823d33999 315 } else { // TxIrq
<> 149:156823d33999 316 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 317 // Check if RxIrq is disabled too
<> 149:156823d33999 318 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
<> 149:156823d33999 319 all_disabled = 1;
<> 149:156823d33999 320 }
<> 149:156823d33999 321 }
<> 149:156823d33999 322
<> 149:156823d33999 323 if (all_disabled) {
<> 149:156823d33999 324 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 325 }
<> 149:156823d33999 326 }
<> 149:156823d33999 327 }
<> 149:156823d33999 328
<> 149:156823d33999 329 /******************************************************************************
<> 149:156823d33999 330 * READ/WRITE
<> 149:156823d33999 331 ******************************************************************************/
<> 149:156823d33999 332
<> 149:156823d33999 333 int serial_getc(serial_t *obj)
<> 149:156823d33999 334 {
<> 149:156823d33999 335 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 336 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 337
<> 149:156823d33999 338 while (!serial_readable(obj));
<> 149:156823d33999 339 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 340 return (int)(huart->Instance->DR & (uint8_t)0xFF);
<> 149:156823d33999 341 } else {
<> 149:156823d33999 342 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
<> 149:156823d33999 343 }
<> 149:156823d33999 344 }
<> 149:156823d33999 345
<> 149:156823d33999 346 void serial_putc(serial_t *obj, int c)
<> 149:156823d33999 347 {
<> 149:156823d33999 348 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 349 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 350
<> 149:156823d33999 351 while (!serial_writable(obj));
<> 149:156823d33999 352 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 353 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
<> 149:156823d33999 354 } else {
<> 149:156823d33999 355 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
<> 149:156823d33999 356 }
<> 149:156823d33999 357 }
<> 149:156823d33999 358
<> 149:156823d33999 359 int serial_readable(serial_t *obj)
<> 149:156823d33999 360 {
<> 149:156823d33999 361 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 362 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 363
<> 149:156823d33999 364 // Check if data is received
<> 149:156823d33999 365 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
<> 149:156823d33999 366 }
<> 149:156823d33999 367
<> 149:156823d33999 368 int serial_writable(serial_t *obj)
<> 149:156823d33999 369 {
<> 149:156823d33999 370 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 371 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 372
<> 149:156823d33999 373 // Check if data is transmitted
<> 149:156823d33999 374 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
<> 149:156823d33999 375 }
<> 149:156823d33999 376
<> 149:156823d33999 377 void serial_clear(serial_t *obj)
<> 149:156823d33999 378 {
<> 149:156823d33999 379 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 380 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 381
<> 149:156823d33999 382 huart->TxXferCount = 0;
<> 149:156823d33999 383 huart->RxXferCount = 0;
<> 149:156823d33999 384 }
<> 149:156823d33999 385
<> 149:156823d33999 386 void serial_pinout_tx(PinName tx)
<> 149:156823d33999 387 {
<> 149:156823d33999 388 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 389 }
<> 149:156823d33999 390
<> 149:156823d33999 391 void serial_break_set(serial_t *obj)
<> 149:156823d33999 392 {
<> 149:156823d33999 393 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 394 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 395
<> 149:156823d33999 396 HAL_LIN_SendBreak(huart);
<> 149:156823d33999 397 }
<> 149:156823d33999 398
<> 149:156823d33999 399 void serial_break_clear(serial_t *obj)
<> 149:156823d33999 400 {
<> 149:156823d33999 401 (void)obj;
<> 149:156823d33999 402 }
<> 149:156823d33999 403
<> 149:156823d33999 404 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 405
<> 149:156823d33999 406 /******************************************************************************
<> 149:156823d33999 407 * LOCAL HELPER FUNCTIONS
<> 149:156823d33999 408 ******************************************************************************/
<> 149:156823d33999 409
<> 149:156823d33999 410 /**
<> 149:156823d33999 411 * Configure the TX buffer for an asynchronous write serial transaction
<> 149:156823d33999 412 *
<> 149:156823d33999 413 * @param obj The serial object.
<> 149:156823d33999 414 * @param tx The buffer for sending.
<> 149:156823d33999 415 * @param tx_length The number of words to transmit.
<> 149:156823d33999 416 */
<> 149:156823d33999 417 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
<> 149:156823d33999 418 {
<> 149:156823d33999 419 (void)width;
<> 149:156823d33999 420
<> 149:156823d33999 421 // Exit if a transmit is already on-going
<> 149:156823d33999 422 if (serial_tx_active(obj)) {
<> 149:156823d33999 423 return;
<> 149:156823d33999 424 }
<> 149:156823d33999 425
<> 149:156823d33999 426 obj->tx_buff.buffer = tx;
<> 149:156823d33999 427 obj->tx_buff.length = tx_length;
<> 149:156823d33999 428 obj->tx_buff.pos = 0;
<> 149:156823d33999 429 }
<> 149:156823d33999 430
<> 149:156823d33999 431 /**
<> 149:156823d33999 432 * Configure the RX buffer for an asynchronous write serial transaction
<> 149:156823d33999 433 *
<> 149:156823d33999 434 * @param obj The serial object.
<> 149:156823d33999 435 * @param tx The buffer for sending.
<> 149:156823d33999 436 * @param tx_length The number of words to transmit.
<> 149:156823d33999 437 */
<> 149:156823d33999 438 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
<> 149:156823d33999 439 {
<> 149:156823d33999 440 (void)width;
<> 149:156823d33999 441
<> 149:156823d33999 442 // Exit if a reception is already on-going
<> 149:156823d33999 443 if (serial_rx_active(obj)) {
<> 149:156823d33999 444 return;
<> 149:156823d33999 445 }
<> 149:156823d33999 446
<> 149:156823d33999 447 obj->rx_buff.buffer = rx;
<> 149:156823d33999 448 obj->rx_buff.length = rx_length;
<> 149:156823d33999 449 obj->rx_buff.pos = 0;
<> 149:156823d33999 450 }
<> 149:156823d33999 451
<> 149:156823d33999 452 /**
<> 149:156823d33999 453 * Configure events
<> 149:156823d33999 454 *
<> 149:156823d33999 455 * @param obj The serial object
<> 149:156823d33999 456 * @param event The logical OR of the events to configure
<> 149:156823d33999 457 * @param enable Set to non-zero to enable events, or zero to disable them
<> 149:156823d33999 458 */
<> 149:156823d33999 459 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
<> 149:156823d33999 460 {
<> 149:156823d33999 461 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 462
<> 149:156823d33999 463 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
<> 149:156823d33999 464 if (enable) {
<> 149:156823d33999 465 obj_s->events |= event;
<> 149:156823d33999 466 } else {
<> 149:156823d33999 467 obj_s->events &= ~event;
<> 149:156823d33999 468 }
<> 149:156823d33999 469 }
<> 149:156823d33999 470
<> 149:156823d33999 471
<> 149:156823d33999 472 /**
<> 149:156823d33999 473 * Get index of serial object TX IRQ, relating it to the physical peripheral.
<> 149:156823d33999 474 *
<> 149:156823d33999 475 * @param obj pointer to serial object
<> 149:156823d33999 476 * @return internal NVIC TX IRQ index of U(S)ART peripheral
<> 149:156823d33999 477 */
<> 149:156823d33999 478 static IRQn_Type serial_get_irq_n(serial_t *obj)
<> 149:156823d33999 479 {
<> 149:156823d33999 480 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 481 IRQn_Type irq_n;
<> 149:156823d33999 482
<> 149:156823d33999 483 switch (obj_s->index) {
<> 149:156823d33999 484 case 0:
<> 149:156823d33999 485 irq_n = USART1_IRQn;
<> 149:156823d33999 486 break;
<> 149:156823d33999 487
<> 149:156823d33999 488 case 1:
<> 149:156823d33999 489 irq_n = USART2_IRQn;
<> 149:156823d33999 490 break;
<> 149:156823d33999 491
<> 149:156823d33999 492 case 2:
<> 149:156823d33999 493 irq_n = USART3_IRQn;
<> 149:156823d33999 494 break;
<> 149:156823d33999 495
<> 149:156823d33999 496 default:
<> 149:156823d33999 497 irq_n = (IRQn_Type)0;
<> 149:156823d33999 498 }
<> 149:156823d33999 499
<> 149:156823d33999 500 return irq_n;
<> 149:156823d33999 501 }
<> 149:156823d33999 502
<> 149:156823d33999 503 /******************************************************************************
<> 149:156823d33999 504 * MBED API FUNCTIONS
<> 149:156823d33999 505 ******************************************************************************/
<> 149:156823d33999 506
<> 149:156823d33999 507 /**
<> 149:156823d33999 508 * Begin asynchronous TX transfer. The used buffer is specified in the serial
<> 149:156823d33999 509 * object, tx_buff
<> 149:156823d33999 510 *
<> 149:156823d33999 511 * @param obj The serial object
<> 149:156823d33999 512 * @param tx The buffer for sending
<> 149:156823d33999 513 * @param tx_length The number of words to transmit
<> 149:156823d33999 514 * @param tx_width The bit width of buffer word
<> 149:156823d33999 515 * @param handler The serial handler
<> 149:156823d33999 516 * @param event The logical OR of events to be registered
<> 149:156823d33999 517 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 518 * @return Returns number of data transfered, or 0 otherwise
<> 149:156823d33999 519 */
<> 149:156823d33999 520 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 521 {
<> 149:156823d33999 522 // TODO: DMA usage is currently ignored
<> 149:156823d33999 523 (void) hint;
<> 149:156823d33999 524
<> 149:156823d33999 525 // Check buffer is ok
<> 149:156823d33999 526 MBED_ASSERT(tx != (void*)0);
<> 149:156823d33999 527 MBED_ASSERT(tx_width == 8); // support only 8b width
<> 149:156823d33999 528
<> 149:156823d33999 529 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 530 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 531
<> 149:156823d33999 532 if (tx_length == 0) {
<> 149:156823d33999 533 return 0;
<> 149:156823d33999 534 }
<> 149:156823d33999 535
<> 149:156823d33999 536 // Set up buffer
<> 149:156823d33999 537 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
<> 149:156823d33999 538
<> 149:156823d33999 539 // Set up events
<> 149:156823d33999 540 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
<> 149:156823d33999 541 serial_enable_event(obj, event, 1); // Set only the wanted events
<> 149:156823d33999 542
<> 149:156823d33999 543 // Enable interrupt
<> 149:156823d33999 544 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 545 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 546 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 547 NVIC_SetPriority(irq_n, 1);
<> 149:156823d33999 548 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 549 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 550
<> 149:156823d33999 551 // the following function will enable UART_IT_TXE and error interrupts
<> 149:156823d33999 552 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
<> 149:156823d33999 553 return 0;
<> 149:156823d33999 554 }
<> 149:156823d33999 555
<> 149:156823d33999 556 return tx_length;
<> 149:156823d33999 557 }
<> 149:156823d33999 558
<> 149:156823d33999 559 /**
<> 149:156823d33999 560 * Begin asynchronous RX transfer (enable interrupt for data collecting)
<> 149:156823d33999 561 * The used buffer is specified in the serial object, rx_buff
<> 149:156823d33999 562 *
<> 149:156823d33999 563 * @param obj The serial object
<> 149:156823d33999 564 * @param rx The buffer for sending
<> 149:156823d33999 565 * @param rx_length The number of words to transmit
<> 149:156823d33999 566 * @param rx_width The bit width of buffer word
<> 149:156823d33999 567 * @param handler The serial handler
<> 149:156823d33999 568 * @param event The logical OR of events to be registered
<> 149:156823d33999 569 * @param handler The serial handler
<> 149:156823d33999 570 * @param char_match A character in range 0-254 to be matched
<> 149:156823d33999 571 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 572 */
<> 149:156823d33999 573 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 574 {
<> 149:156823d33999 575 // TODO: DMA usage is currently ignored
<> 149:156823d33999 576 (void) hint;
<> 149:156823d33999 577
<> 149:156823d33999 578 /* Sanity check arguments */
<> 149:156823d33999 579 MBED_ASSERT(obj);
<> 149:156823d33999 580 MBED_ASSERT(rx != (void*)0);
<> 149:156823d33999 581 MBED_ASSERT(rx_width == 8); // support only 8b width
<> 149:156823d33999 582
<> 149:156823d33999 583 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 584 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 585
<> 149:156823d33999 586 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
<> 149:156823d33999 587 serial_enable_event(obj, event, 1);
<> 149:156823d33999 588
<> 149:156823d33999 589 // set CharMatch
<> 149:156823d33999 590 obj->char_match = char_match;
<> 149:156823d33999 591
<> 149:156823d33999 592 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
<> 149:156823d33999 593
<> 149:156823d33999 594 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 595 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 596 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 597 NVIC_SetPriority(irq_n, 0);
<> 149:156823d33999 598 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 599 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 600
<> 149:156823d33999 601 // following HAL function will enable the RXNE interrupt + error interrupts
<> 149:156823d33999 602 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
<> 149:156823d33999 603 }
<> 149:156823d33999 604
<> 149:156823d33999 605 /**
<> 149:156823d33999 606 * Attempts to determine if the serial peripheral is already in use for TX
<> 149:156823d33999 607 *
<> 149:156823d33999 608 * @param obj The serial object
<> 149:156823d33999 609 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
<> 149:156823d33999 610 */
<> 149:156823d33999 611 uint8_t serial_tx_active(serial_t *obj)
<> 149:156823d33999 612 {
<> 149:156823d33999 613 MBED_ASSERT(obj);
<> 149:156823d33999 614
<> 149:156823d33999 615 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 616 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 617
<> 149:156823d33999 618 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
<> 149:156823d33999 619 }
<> 149:156823d33999 620
<> 149:156823d33999 621 /**
<> 149:156823d33999 622 * Attempts to determine if the serial peripheral is already in use for RX
<> 149:156823d33999 623 *
<> 149:156823d33999 624 * @param obj The serial object
<> 149:156823d33999 625 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
<> 149:156823d33999 626 */
<> 149:156823d33999 627 uint8_t serial_rx_active(serial_t *obj)
<> 149:156823d33999 628 {
<> 149:156823d33999 629 MBED_ASSERT(obj);
<> 149:156823d33999 630
<> 149:156823d33999 631 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 632 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 633
<> 149:156823d33999 634 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
<> 149:156823d33999 635 }
<> 149:156823d33999 636
<> 149:156823d33999 637 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 638 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 639 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 640 }
<> 149:156823d33999 641 }
<> 149:156823d33999 642
<> 149:156823d33999 643 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 644 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 645 volatile uint32_t tmpval = huart->Instance->DR; // Clear PE flag
<> 149:156823d33999 646 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 647 volatile uint32_t tmpval = huart->Instance->DR; // Clear FE flag
<> 149:156823d33999 648 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
<> 149:156823d33999 649 volatile uint32_t tmpval = huart->Instance->DR; // Clear NE flag
<> 149:156823d33999 650 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 651 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
<> 149:156823d33999 652 }
<> 149:156823d33999 653 }
<> 149:156823d33999 654
<> 149:156823d33999 655 /**
<> 149:156823d33999 656 * The asynchronous TX and RX handler.
<> 149:156823d33999 657 *
<> 149:156823d33999 658 * @param obj The serial object
<> 149:156823d33999 659 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
<> 149:156823d33999 660 */
<> 149:156823d33999 661 int serial_irq_handler_asynch(serial_t *obj)
<> 149:156823d33999 662 {
<> 149:156823d33999 663 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 664 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 665
<> 149:156823d33999 666 volatile int return_event = 0;
<> 149:156823d33999 667 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
<> 149:156823d33999 668 uint8_t i = 0;
<> 149:156823d33999 669
<> 149:156823d33999 670 // TX PART:
<> 149:156823d33999 671 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 672 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 673 // Return event SERIAL_EVENT_TX_COMPLETE if requested
<> 149:156823d33999 674 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
<> 149:156823d33999 675 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
<> 149:156823d33999 676 }
<> 149:156823d33999 677 }
<> 149:156823d33999 678 }
<> 149:156823d33999 679
<> 149:156823d33999 680 // Handle error events
<> 149:156823d33999 681 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 682 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 683 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
<> 149:156823d33999 684 }
<> 149:156823d33999 685 }
<> 149:156823d33999 686
<> 149:156823d33999 687 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 688 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 689 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
<> 149:156823d33999 690 }
<> 149:156823d33999 691 }
<> 149:156823d33999 692
<> 149:156823d33999 693 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 694 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 695 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
<> 149:156823d33999 696 }
<> 149:156823d33999 697 }
<> 149:156823d33999 698
<> 149:156823d33999 699 HAL_UART_IRQHandler(huart);
<> 149:156823d33999 700
<> 149:156823d33999 701 // Abort if an error occurs
<> 149:156823d33999 702 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
<> 149:156823d33999 703 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
<> 149:156823d33999 704 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
<> 149:156823d33999 705 return return_event;
<> 149:156823d33999 706 }
<> 149:156823d33999 707
<> 149:156823d33999 708 //RX PART
<> 149:156823d33999 709 if (huart->RxXferSize != 0) {
<> 149:156823d33999 710 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
<> 149:156823d33999 711 }
<> 149:156823d33999 712 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
<> 149:156823d33999 713 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
<> 149:156823d33999 714 }
<> 149:156823d33999 715
<> 149:156823d33999 716 // Check if char_match is present
<> 149:156823d33999 717 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
<> 149:156823d33999 718 if (buf != NULL) {
<> 149:156823d33999 719 for (i = 0; i < obj->rx_buff.pos; i++) {
<> 149:156823d33999 720 if (buf[i] == obj->char_match) {
<> 149:156823d33999 721 obj->rx_buff.pos = i;
<> 149:156823d33999 722 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
<> 149:156823d33999 723 serial_rx_abort_asynch(obj);
<> 149:156823d33999 724 break;
<> 149:156823d33999 725 }
<> 149:156823d33999 726 }
<> 149:156823d33999 727 }
<> 149:156823d33999 728 }
<> 149:156823d33999 729
<> 149:156823d33999 730 return return_event;
<> 149:156823d33999 731 }
<> 149:156823d33999 732
<> 149:156823d33999 733 /**
<> 149:156823d33999 734 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
<> 149:156823d33999 735 * flush TX hardware buffer if TX FIFO is used
<> 149:156823d33999 736 *
<> 149:156823d33999 737 * @param obj The serial object
<> 149:156823d33999 738 */
<> 149:156823d33999 739 void serial_tx_abort_asynch(serial_t *obj)
<> 149:156823d33999 740 {
<> 149:156823d33999 741 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 742 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 743
<> 149:156823d33999 744 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 745 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
<> 149:156823d33999 746
<> 149:156823d33999 747 // clear flags
<> 149:156823d33999 748 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 749
<> 149:156823d33999 750 // reset states
<> 149:156823d33999 751 huart->TxXferCount = 0;
<> 149:156823d33999 752 // update handle state
<> 149:156823d33999 753 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 754 huart->State = HAL_UART_STATE_BUSY_RX;
<> 149:156823d33999 755 } else {
<> 149:156823d33999 756 huart->State = HAL_UART_STATE_READY;
<> 149:156823d33999 757 }
<> 149:156823d33999 758 }
<> 149:156823d33999 759
<> 149:156823d33999 760 /**
<> 149:156823d33999 761 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
<> 149:156823d33999 762 * flush RX hardware buffer if RX FIFO is used
<> 149:156823d33999 763 *
<> 149:156823d33999 764 * @param obj The serial object
<> 149:156823d33999 765 */
<> 149:156823d33999 766 void serial_rx_abort_asynch(serial_t *obj)
<> 149:156823d33999 767 {
<> 149:156823d33999 768 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 769 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 770
<> 149:156823d33999 771 // disable interrupts
<> 149:156823d33999 772 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 773 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
<> 149:156823d33999 774 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
<> 149:156823d33999 775
<> 149:156823d33999 776 // clear flags
<> 149:156823d33999 777 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 778 volatile uint32_t tmpval = huart->Instance->DR; // Clear errors flag
<> 149:156823d33999 779
<> 149:156823d33999 780 // reset states
<> 149:156823d33999 781 huart->RxXferCount = 0;
<> 149:156823d33999 782 // update handle state
<> 149:156823d33999 783 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 784 huart->State = HAL_UART_STATE_BUSY_TX;
<> 149:156823d33999 785 } else {
<> 149:156823d33999 786 huart->State = HAL_UART_STATE_READY;
<> 149:156823d33999 787 }
<> 149:156823d33999 788 }
<> 149:156823d33999 789
<> 149:156823d33999 790 #endif
<> 149:156823d33999 791
<> 149:156823d33999 792 #if DEVICE_SERIAL_FC
<> 149:156823d33999 793
<> 149:156823d33999 794 /**
<> 149:156823d33999 795 * Set HW Control Flow
<> 149:156823d33999 796 * @param obj The serial object
<> 149:156823d33999 797 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
<> 149:156823d33999 798 * @param rxflow Pin for the rxflow
<> 149:156823d33999 799 * @param txflow Pin for the txflow
<> 149:156823d33999 800 */
<> 149:156823d33999 801 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
<> 149:156823d33999 802 {
<> 149:156823d33999 803 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 804
<> 149:156823d33999 805 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 806 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 807 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
<> 149:156823d33999 808
<> 149:156823d33999 809 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 810 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
<> 149:156823d33999 811 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 812
<> 149:156823d33999 813 if(type == FlowControlNone) {
<> 149:156823d33999 814 // Disable hardware flow control
<> 149:156823d33999 815 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 816 }
<> 149:156823d33999 817 if (type == FlowControlRTS) {
<> 149:156823d33999 818 // Enable RTS
<> 149:156823d33999 819 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 820 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
<> 149:156823d33999 821 obj_s->pin_rts = rxflow;
<> 149:156823d33999 822 // Enable the pin for RTS function
<> 149:156823d33999 823 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 824 }
<> 149:156823d33999 825 if (type == FlowControlCTS) {
<> 149:156823d33999 826 // Enable CTS
<> 149:156823d33999 827 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 828 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
<> 149:156823d33999 829 obj_s->pin_cts = txflow;
<> 149:156823d33999 830 // Enable the pin for CTS function
<> 149:156823d33999 831 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 832 }
<> 149:156823d33999 833 if (type == FlowControlRTSCTS) {
<> 149:156823d33999 834 // Enable CTS & RTS
<> 149:156823d33999 835 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 836 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 837 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
<> 149:156823d33999 838 obj_s->pin_rts = rxflow;
<> 149:156823d33999 839 obj_s->pin_cts = txflow;
<> 149:156823d33999 840 // Enable the pin for CTS function
<> 149:156823d33999 841 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 842 // Enable the pin for RTS function
<> 149:156823d33999 843 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 844 }
<> 149:156823d33999 845
<> 149:156823d33999 846 init_uart(obj);
<> 149:156823d33999 847 }
<> 149:156823d33999 848
<> 149:156823d33999 849 #endif
<> 149:156823d33999 850
<> 149:156823d33999 851 #endif