Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

targets/TARGET_STM/TARGET_STM32F7/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) 2015, 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 <string.h>
<> 149:156823d33999 38 #include "PeripheralPins.h"
<> 149:156823d33999 39 #include "mbed_error.h"
<> 149:156823d33999 40
<> 149:156823d33999 41 #define UART_NUM (8)
<> 149:156823d33999 42 static uint32_t serial_irq_ids[UART_NUM] = {0};
<> 149:156823d33999 43 static UART_HandleTypeDef uart_handlers[UART_NUM];
<> 149:156823d33999 44
<> 149:156823d33999 45 static uart_irq_handler irq_handler;
<> 149:156823d33999 46
<> 149:156823d33999 47 int stdio_uart_inited = 0;
<> 149:156823d33999 48 serial_t stdio_uart;
<> 149:156823d33999 49
<> 149:156823d33999 50 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 51 #define SERIAL_S(obj) (&((obj)->serial))
<> 149:156823d33999 52 #else
<> 149:156823d33999 53 #define SERIAL_S(obj) (obj)
<> 149:156823d33999 54 #endif
<> 149:156823d33999 55
<> 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->Init.OverSampling = UART_OVERSAMPLING_16;
<> 149:156823d33999 73 huart->TxXferCount = 0;
<> 149:156823d33999 74 huart->TxXferSize = 0;
<> 149:156823d33999 75 huart->RxXferCount = 0;
<> 149:156823d33999 76 huart->RxXferSize = 0;
<> 149:156823d33999 77
<> 149:156823d33999 78 if (obj_s->pin_rx == NC) {
<> 149:156823d33999 79 huart->Init.Mode = UART_MODE_TX;
<> 149:156823d33999 80 } else if (obj_s->pin_tx == NC) {
<> 149:156823d33999 81 huart->Init.Mode = UART_MODE_RX;
<> 149:156823d33999 82 } else {
<> 149:156823d33999 83 huart->Init.Mode = UART_MODE_TX_RX;
<> 149:156823d33999 84 }
<> 149:156823d33999 85
<> 149:156823d33999 86 if (HAL_UART_Init(huart) != HAL_OK) {
<> 149:156823d33999 87 error("Cannot initialize UART\n");
<> 149:156823d33999 88 }
<> 149:156823d33999 89 }
<> 149:156823d33999 90
<> 149:156823d33999 91 void serial_init(serial_t *obj, PinName tx, PinName rx)
<> 149:156823d33999 92 {
<> 149:156823d33999 93 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 94
<> 149:156823d33999 95 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 96 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
<> 149:156823d33999 97 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
<> 149:156823d33999 98
<> 149:156823d33999 99 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 100 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
<> 149:156823d33999 101 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 102
<> 149:156823d33999 103 // Enable USART clock
<> 149:156823d33999 104 switch (obj_s->uart) {
<> 149:156823d33999 105 case UART_1:
<> 149:156823d33999 106 __HAL_RCC_USART1_FORCE_RESET();
<> 149:156823d33999 107 __HAL_RCC_USART1_RELEASE_RESET();
<> 149:156823d33999 108 __HAL_RCC_USART1_CLK_ENABLE();
<> 149:156823d33999 109 obj_s->index = 0;
<> 149:156823d33999 110 break;
<> 149:156823d33999 111
<> 149:156823d33999 112 case UART_2:
<> 149:156823d33999 113 __HAL_RCC_USART2_FORCE_RESET();
<> 149:156823d33999 114 __HAL_RCC_USART2_RELEASE_RESET();
<> 149:156823d33999 115 __HAL_RCC_USART2_CLK_ENABLE();
<> 149:156823d33999 116 obj_s->index = 1;
<> 149:156823d33999 117 break;
<> 149:156823d33999 118 #if defined(USART3_BASE)
<> 149:156823d33999 119 case UART_3:
<> 149:156823d33999 120 __HAL_RCC_USART3_FORCE_RESET();
<> 149:156823d33999 121 __HAL_RCC_USART3_RELEASE_RESET();
<> 149:156823d33999 122 __HAL_RCC_USART3_CLK_ENABLE();
<> 149:156823d33999 123 obj_s->index = 2;
<> 149:156823d33999 124 break;
<> 149:156823d33999 125 #endif
<> 149:156823d33999 126 #if defined(UART4_BASE)
<> 149:156823d33999 127 case UART_4:
<> 149:156823d33999 128 __HAL_RCC_UART4_FORCE_RESET();
<> 149:156823d33999 129 __HAL_RCC_UART4_RELEASE_RESET();
<> 149:156823d33999 130 __HAL_RCC_UART4_CLK_ENABLE();
<> 149:156823d33999 131 obj_s->index = 3;
<> 149:156823d33999 132 break;
<> 149:156823d33999 133 #endif
<> 149:156823d33999 134 #if defined(UART5_BASE)
<> 149:156823d33999 135 case UART_5:
<> 149:156823d33999 136 __HAL_RCC_UART5_FORCE_RESET();
<> 149:156823d33999 137 __HAL_RCC_UART5_RELEASE_RESET();
<> 149:156823d33999 138 __HAL_RCC_UART5_CLK_ENABLE();
<> 149:156823d33999 139 obj_s->index = 4;
<> 149:156823d33999 140 break;
<> 149:156823d33999 141 #endif
<> 149:156823d33999 142 case UART_6:
<> 149:156823d33999 143 __HAL_RCC_USART6_FORCE_RESET();
<> 149:156823d33999 144 __HAL_RCC_USART6_RELEASE_RESET();
<> 149:156823d33999 145 __HAL_RCC_USART6_CLK_ENABLE();
<> 149:156823d33999 146 obj_s->index = 5;
<> 149:156823d33999 147 break;
<> 149:156823d33999 148 #if defined(UART7_BASE)
<> 149:156823d33999 149 case UART_7:
<> 149:156823d33999 150 __HAL_RCC_UART7_FORCE_RESET();
<> 149:156823d33999 151 __HAL_RCC_UART7_RELEASE_RESET();
<> 149:156823d33999 152 __HAL_RCC_UART7_CLK_ENABLE();
<> 149:156823d33999 153 obj_s->index = 6;
<> 149:156823d33999 154 break;
<> 149:156823d33999 155 #endif
<> 149:156823d33999 156 #if defined(UART8_BASE)
<> 149:156823d33999 157 case UART_8:
<> 149:156823d33999 158 __HAL_RCC_UART8_FORCE_RESET();
<> 149:156823d33999 159 __HAL_RCC_UART8_RELEASE_RESET();
<> 149:156823d33999 160 __HAL_RCC_UART8_CLK_ENABLE();
<> 149:156823d33999 161 obj_s->index = 7;
<> 149:156823d33999 162 break;
<> 149:156823d33999 163 #endif
<> 149:156823d33999 164 }
<> 149:156823d33999 165
<> 149:156823d33999 166 // Configure the UART pins
<> 149:156823d33999 167 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 168 pinmap_pinout(rx, PinMap_UART_RX);
<> 149:156823d33999 169
<> 149:156823d33999 170 if (tx != NC) {
<> 149:156823d33999 171 pin_mode(tx, PullUp);
<> 149:156823d33999 172 }
<> 149:156823d33999 173 if (rx != NC) {
<> 149:156823d33999 174 pin_mode(rx, PullUp);
<> 149:156823d33999 175 }
<> 149:156823d33999 176
<> 149:156823d33999 177 // Configure UART
<> 149:156823d33999 178 obj_s->baudrate = 9600;
<> 149:156823d33999 179 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 180 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 181 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 182
<> 149:156823d33999 183 #if DEVICE_SERIAL_FC
<> 149:156823d33999 184 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 185 #endif
<> 149:156823d33999 186
<> 149:156823d33999 187 obj_s->pin_tx = tx;
<> 149:156823d33999 188 obj_s->pin_rx = rx;
<> 149:156823d33999 189
<> 149:156823d33999 190 init_uart(obj);
<> 149:156823d33999 191
<> 149:156823d33999 192 // For stdio management
<> 149:156823d33999 193 if (obj_s->uart == STDIO_UART) {
<> 149:156823d33999 194 stdio_uart_inited = 1;
<> 149:156823d33999 195 memcpy(&stdio_uart, obj, sizeof(serial_t));
<> 149:156823d33999 196 }
<> 149:156823d33999 197 }
<> 149:156823d33999 198
<> 149:156823d33999 199 void serial_free(serial_t *obj)
<> 149:156823d33999 200 {
<> 149:156823d33999 201 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 202
<> 149:156823d33999 203 // Reset UART and disable clock
<> 149:156823d33999 204 switch (obj_s->uart) {
<> 149:156823d33999 205 case UART_1:
<> 149:156823d33999 206 __USART1_FORCE_RESET();
<> 149:156823d33999 207 __USART1_RELEASE_RESET();
<> 149:156823d33999 208 __USART1_CLK_DISABLE();
<> 149:156823d33999 209 break;
<> 149:156823d33999 210 case UART_2:
<> 149:156823d33999 211 __USART2_FORCE_RESET();
<> 149:156823d33999 212 __USART2_RELEASE_RESET();
<> 149:156823d33999 213 __USART2_CLK_DISABLE();
<> 149:156823d33999 214 break;
<> 149:156823d33999 215 #if defined(USART3_BASE)
<> 149:156823d33999 216 case UART_3:
<> 149:156823d33999 217 __USART3_FORCE_RESET();
<> 149:156823d33999 218 __USART3_RELEASE_RESET();
<> 149:156823d33999 219 __USART3_CLK_DISABLE();
<> 149:156823d33999 220 break;
<> 149:156823d33999 221 #endif
<> 149:156823d33999 222 #if defined(UART4_BASE)
<> 149:156823d33999 223 case UART_4:
<> 149:156823d33999 224 __UART4_FORCE_RESET();
<> 149:156823d33999 225 __UART4_RELEASE_RESET();
<> 149:156823d33999 226 __UART4_CLK_DISABLE();
<> 149:156823d33999 227 break;
<> 149:156823d33999 228 #endif
<> 149:156823d33999 229 #if defined(UART5_BASE)
<> 149:156823d33999 230 case UART_5:
<> 149:156823d33999 231 __UART5_FORCE_RESET();
<> 149:156823d33999 232 __UART5_RELEASE_RESET();
<> 149:156823d33999 233 __UART5_CLK_DISABLE();
<> 149:156823d33999 234 break;
<> 149:156823d33999 235 #endif
<> 149:156823d33999 236 case UART_6:
<> 149:156823d33999 237 __USART6_FORCE_RESET();
<> 149:156823d33999 238 __USART6_RELEASE_RESET();
<> 149:156823d33999 239 __USART6_CLK_DISABLE();
<> 149:156823d33999 240 break;
<> 149:156823d33999 241 #if defined(UART7_BASE)
<> 149:156823d33999 242 case UART_7:
<> 149:156823d33999 243 __UART7_FORCE_RESET();
<> 149:156823d33999 244 __UART7_RELEASE_RESET();
<> 149:156823d33999 245 __UART7_CLK_DISABLE();
<> 149:156823d33999 246 break;
<> 149:156823d33999 247 #endif
<> 149:156823d33999 248 #if defined(UART8_BASE)
<> 149:156823d33999 249 case UART_8:
<> 149:156823d33999 250 __UART8_FORCE_RESET();
<> 149:156823d33999 251 __UART8_RELEASE_RESET();
<> 149:156823d33999 252 __UART8_CLK_DISABLE();
<> 149:156823d33999 253 break;
<> 149:156823d33999 254 #endif
<> 149:156823d33999 255 }
<> 149:156823d33999 256
<> 149:156823d33999 257 // Configure GPIOs
<> 149:156823d33999 258 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 259 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 260
<> 149:156823d33999 261 serial_irq_ids[obj_s->index] = 0;
<> 149:156823d33999 262 }
<> 149:156823d33999 263
<> 149:156823d33999 264 void serial_baud(serial_t *obj, int baudrate)
<> 149:156823d33999 265 {
<> 149:156823d33999 266 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 267
<> 149:156823d33999 268 obj_s->baudrate = baudrate;
<> 149:156823d33999 269 init_uart(obj);
<> 149:156823d33999 270 }
<> 149:156823d33999 271
<> 149:156823d33999 272 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
<> 149:156823d33999 273 {
<> 149:156823d33999 274 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 275
<> 149:156823d33999 276 if (data_bits == 9) {
<> 149:156823d33999 277 obj_s->databits = UART_WORDLENGTH_9B;
<> 149:156823d33999 278 } else {
<> 149:156823d33999 279 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 280 }
<> 149:156823d33999 281
<> 149:156823d33999 282 switch (parity) {
<> 149:156823d33999 283 case ParityOdd:
<> 149:156823d33999 284 obj_s->parity = UART_PARITY_ODD;
<> 149:156823d33999 285 break;
<> 149:156823d33999 286 case ParityEven:
<> 149:156823d33999 287 obj_s->parity = UART_PARITY_EVEN;
<> 149:156823d33999 288 break;
<> 149:156823d33999 289 default: // ParityNone
<> 149:156823d33999 290 case ParityForced0: // unsupported!
<> 149:156823d33999 291 case ParityForced1: // unsupported!
<> 149:156823d33999 292 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 293 break;
<> 149:156823d33999 294 }
<> 149:156823d33999 295
<> 149:156823d33999 296 if (stop_bits == 2) {
<> 149:156823d33999 297 obj_s->stopbits = UART_STOPBITS_2;
<> 149:156823d33999 298 } else {
<> 149:156823d33999 299 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 300 }
<> 149:156823d33999 301
<> 149:156823d33999 302 init_uart(obj);
<> 149:156823d33999 303 }
<> 149:156823d33999 304
<> 149:156823d33999 305 /******************************************************************************
<> 149:156823d33999 306 * INTERRUPTS HANDLING
<> 149:156823d33999 307 ******************************************************************************/
<> 149:156823d33999 308
<> 149:156823d33999 309 static void uart_irq(int id)
<> 149:156823d33999 310 {
<> 149:156823d33999 311 UART_HandleTypeDef * huart = &uart_handlers[id];
<> 149:156823d33999 312
<> 149:156823d33999 313 if (serial_irq_ids[id] != 0) {
<> 149:156823d33999 314 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 315 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 316 irq_handler(serial_irq_ids[id], TxIrq);
<> 149:156823d33999 317 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_TCF);
<> 149:156823d33999 318 }
<> 149:156823d33999 319 }
<> 149:156823d33999 320 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
<> 149:156823d33999 321 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
<> 149:156823d33999 322 irq_handler(serial_irq_ids[id], RxIrq);
<> 149:156823d33999 323 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE
<> 149:156823d33999 324 }
<> 149:156823d33999 325 }
<> 149:156823d33999 326 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 327 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ORE) != RESET) {
<> 149:156823d33999 328 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
<> 149:156823d33999 329 }
<> 149:156823d33999 330 }
<> 149:156823d33999 331 }
<> 149:156823d33999 332 }
<> 149:156823d33999 333
<> 149:156823d33999 334 static void uart1_irq(void)
<> 149:156823d33999 335 {
<> 149:156823d33999 336 uart_irq(0);
<> 149:156823d33999 337 }
<> 149:156823d33999 338
<> 149:156823d33999 339 static void uart2_irq(void)
<> 149:156823d33999 340 {
<> 149:156823d33999 341 uart_irq(1);
<> 149:156823d33999 342 }
<> 149:156823d33999 343
<> 149:156823d33999 344 #if defined(USART3_BASE)
<> 149:156823d33999 345 static void uart3_irq(void)
<> 149:156823d33999 346 {
<> 149:156823d33999 347 uart_irq(2);
<> 149:156823d33999 348 }
<> 149:156823d33999 349 #endif
<> 149:156823d33999 350
<> 149:156823d33999 351 #if defined(UART4_BASE)
<> 149:156823d33999 352 static void uart4_irq(void)
<> 149:156823d33999 353 {
<> 149:156823d33999 354 uart_irq(3);
<> 149:156823d33999 355 }
<> 149:156823d33999 356 #endif
<> 149:156823d33999 357
<> 149:156823d33999 358 #if defined(UART5_BASE)
<> 149:156823d33999 359 static void uart5_irq(void)
<> 149:156823d33999 360 {
<> 149:156823d33999 361 uart_irq(4);
<> 149:156823d33999 362 }
<> 149:156823d33999 363 #endif
<> 149:156823d33999 364
<> 149:156823d33999 365 static void uart6_irq(void)
<> 149:156823d33999 366 {
<> 149:156823d33999 367 uart_irq(5);
<> 149:156823d33999 368 }
<> 149:156823d33999 369
<> 149:156823d33999 370 #if defined(UART7_BASE)
<> 149:156823d33999 371 static void uart7_irq(void)
<> 149:156823d33999 372 {
<> 149:156823d33999 373 uart_irq(6);
<> 149:156823d33999 374 }
<> 149:156823d33999 375 #endif
<> 149:156823d33999 376
<> 149:156823d33999 377 #if defined(UART8_BASE)
<> 149:156823d33999 378 static void uart8_irq(void)
<> 149:156823d33999 379 {
<> 149:156823d33999 380 uart_irq(7);
<> 149:156823d33999 381 }
<> 149:156823d33999 382 #endif
<> 149:156823d33999 383
<> 149:156823d33999 384 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
<> 149:156823d33999 385 {
<> 149:156823d33999 386 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 387
<> 149:156823d33999 388 irq_handler = handler;
<> 149:156823d33999 389 serial_irq_ids[obj_s->index] = id;
<> 149:156823d33999 390 }
<> 149:156823d33999 391
<> 149:156823d33999 392 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
<> 149:156823d33999 393 {
<> 149:156823d33999 394 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 395 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 396 IRQn_Type irq_n = (IRQn_Type)0;
<> 149:156823d33999 397 uint32_t vector = 0;
<> 149:156823d33999 398
<> 149:156823d33999 399 switch (obj_s->uart) {
<> 149:156823d33999 400 case UART_1:
<> 149:156823d33999 401 irq_n = USART1_IRQn;
<> 149:156823d33999 402 vector = (uint32_t)&uart1_irq;
<> 149:156823d33999 403 break;
<> 149:156823d33999 404
<> 149:156823d33999 405 case UART_2:
<> 149:156823d33999 406 irq_n = USART2_IRQn;
<> 149:156823d33999 407 vector = (uint32_t)&uart2_irq;
<> 149:156823d33999 408 break;
<> 149:156823d33999 409 #if defined(USART3_BASE)
<> 149:156823d33999 410 case UART_3:
<> 149:156823d33999 411 irq_n = USART3_IRQn;
<> 149:156823d33999 412 vector = (uint32_t)&uart3_irq;
<> 149:156823d33999 413 break;
<> 149:156823d33999 414 #endif
<> 149:156823d33999 415 #if defined(UART4_BASE)
<> 149:156823d33999 416 case UART_4:
<> 149:156823d33999 417 irq_n = UART4_IRQn;
<> 149:156823d33999 418 vector = (uint32_t)&uart4_irq;
<> 149:156823d33999 419 break;
<> 149:156823d33999 420 #endif
<> 149:156823d33999 421 #if defined(UART5_BASE)
<> 149:156823d33999 422 case UART_5:
<> 149:156823d33999 423 irq_n = UART5_IRQn;
<> 149:156823d33999 424 vector = (uint32_t)&uart5_irq;
<> 149:156823d33999 425 break;
<> 149:156823d33999 426 #endif
<> 149:156823d33999 427 case UART_6:
<> 149:156823d33999 428 irq_n = USART6_IRQn;
<> 149:156823d33999 429 vector = (uint32_t)&uart6_irq;
<> 149:156823d33999 430 break;
<> 149:156823d33999 431 #if defined(UART7_BASE)
<> 149:156823d33999 432 case UART_7:
<> 149:156823d33999 433 irq_n = UART7_IRQn;
<> 149:156823d33999 434 vector = (uint32_t)&uart7_irq;
<> 149:156823d33999 435 break;
<> 149:156823d33999 436 #endif
<> 149:156823d33999 437 #if defined(UART8_BASE)
<> 149:156823d33999 438 case UART_8:
<> 149:156823d33999 439 irq_n = UART8_IRQn;
<> 149:156823d33999 440 vector = (uint32_t)&uart8_irq;
<> 149:156823d33999 441 break;
<> 149:156823d33999 442 #endif
<> 149:156823d33999 443 }
<> 149:156823d33999 444
<> 149:156823d33999 445 if (enable) {
<> 149:156823d33999 446 if (irq == RxIrq) {
<> 149:156823d33999 447 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 448 } else { // TxIrq
<> 149:156823d33999 449 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 450 }
<> 149:156823d33999 451 NVIC_SetVector(irq_n, vector);
<> 149:156823d33999 452 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 453
<> 149:156823d33999 454 } else { // disable
<> 149:156823d33999 455 int all_disabled = 0;
<> 149:156823d33999 456 if (irq == RxIrq) {
<> 149:156823d33999 457 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 458 // Check if TxIrq is disabled too
<> 149:156823d33999 459 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
<> 149:156823d33999 460 all_disabled = 1;
<> 149:156823d33999 461 }
<> 149:156823d33999 462 } else { // TxIrq
<> 149:156823d33999 463 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 464 // Check if RxIrq is disabled too
<> 149:156823d33999 465 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
<> 149:156823d33999 466 all_disabled = 1;
<> 149:156823d33999 467 }
<> 149:156823d33999 468 }
<> 149:156823d33999 469
<> 149:156823d33999 470 if (all_disabled) {
<> 149:156823d33999 471 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 472 }
<> 149:156823d33999 473 }
<> 149:156823d33999 474 }
<> 149:156823d33999 475
<> 149:156823d33999 476 /******************************************************************************
<> 149:156823d33999 477 * READ/WRITE
<> 149:156823d33999 478 ******************************************************************************/
<> 149:156823d33999 479
<> 149:156823d33999 480 int serial_getc(serial_t *obj)
<> 149:156823d33999 481 {
<> 149:156823d33999 482 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 483 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 484
<> 149:156823d33999 485 while (!serial_readable(obj));
<> 149:156823d33999 486 return (int)(huart->Instance->RDR & 0x1FF);
<> 149:156823d33999 487 }
<> 149:156823d33999 488
<> 149:156823d33999 489 void serial_putc(serial_t *obj, int c)
<> 149:156823d33999 490 {
<> 149:156823d33999 491 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 492 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 493
<> 149:156823d33999 494 while (!serial_writable(obj));
<> 149:156823d33999 495 huart->Instance->TDR = (uint32_t)(c & 0x1FF);
<> 149:156823d33999 496 }
<> 149:156823d33999 497
<> 149:156823d33999 498 int serial_readable(serial_t *obj)
<> 149:156823d33999 499 {
<> 149:156823d33999 500 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 501 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 502
<> 149:156823d33999 503 // Check if data is received
<> 149:156823d33999 504 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
<> 149:156823d33999 505 }
<> 149:156823d33999 506
<> 149:156823d33999 507 int serial_writable(serial_t *obj)
<> 149:156823d33999 508 {
<> 149:156823d33999 509 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 510 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 511
<> 149:156823d33999 512 // Check if data is transmitted
<> 149:156823d33999 513 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
<> 149:156823d33999 514 }
<> 149:156823d33999 515
<> 149:156823d33999 516 void serial_clear(serial_t *obj)
<> 149:156823d33999 517 {
<> 149:156823d33999 518 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 519 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 520
<> 149:156823d33999 521 __HAL_UART_CLEAR_IT(huart, UART_FLAG_TXE);
<> 149:156823d33999 522 __HAL_UART_CLEAR_IT(huart, UART_FLAG_RXNE);
<> 149:156823d33999 523 }
<> 149:156823d33999 524
<> 149:156823d33999 525 void serial_pinout_tx(PinName tx)
<> 149:156823d33999 526 {
<> 149:156823d33999 527 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 528 }
<> 149:156823d33999 529
<> 149:156823d33999 530 void serial_break_set(serial_t *obj)
<> 149:156823d33999 531 {
<> 149:156823d33999 532 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 533 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 534
<> 149:156823d33999 535 HAL_LIN_SendBreak(huart);
<> 149:156823d33999 536 }
<> 149:156823d33999 537
<> 149:156823d33999 538 void serial_break_clear(serial_t *obj)
<> 149:156823d33999 539 {
<> 149:156823d33999 540 (void)obj;
<> 149:156823d33999 541 }
<> 149:156823d33999 542
<> 149:156823d33999 543 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 544
<> 149:156823d33999 545 /******************************************************************************
<> 149:156823d33999 546 * LOCAL HELPER FUNCTIONS
<> 149:156823d33999 547 ******************************************************************************/
<> 149:156823d33999 548
<> 149:156823d33999 549 /**
<> 149:156823d33999 550 * Configure the TX buffer for an asynchronous write serial transaction
<> 149:156823d33999 551 *
<> 149:156823d33999 552 * @param obj The serial object.
<> 149:156823d33999 553 * @param tx The buffer for sending.
<> 149:156823d33999 554 * @param tx_length The number of words to transmit.
<> 149:156823d33999 555 */
<> 149:156823d33999 556 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
<> 149:156823d33999 557 {
<> 149:156823d33999 558 (void)width;
<> 149:156823d33999 559
<> 149:156823d33999 560 // Exit if a transmit is already on-going
<> 149:156823d33999 561 if (serial_tx_active(obj)) {
<> 149:156823d33999 562 return;
<> 149:156823d33999 563 }
<> 149:156823d33999 564
<> 149:156823d33999 565 obj->tx_buff.buffer = tx;
<> 149:156823d33999 566 obj->tx_buff.length = tx_length;
<> 149:156823d33999 567 obj->tx_buff.pos = 0;
<> 149:156823d33999 568 }
<> 149:156823d33999 569
<> 149:156823d33999 570 /**
<> 149:156823d33999 571 * Configure the RX buffer for an asynchronous write serial transaction
<> 149:156823d33999 572 *
<> 149:156823d33999 573 * @param obj The serial object.
<> 149:156823d33999 574 * @param tx The buffer for sending.
<> 149:156823d33999 575 * @param tx_length The number of words to transmit.
<> 149:156823d33999 576 */
<> 149:156823d33999 577 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
<> 149:156823d33999 578 {
<> 149:156823d33999 579 (void)width;
<> 149:156823d33999 580
<> 149:156823d33999 581 // Exit if a reception is already on-going
<> 149:156823d33999 582 if (serial_rx_active(obj)) {
<> 149:156823d33999 583 return;
<> 149:156823d33999 584 }
<> 149:156823d33999 585
<> 149:156823d33999 586 obj->rx_buff.buffer = rx;
<> 149:156823d33999 587 obj->rx_buff.length = rx_length;
<> 149:156823d33999 588 obj->rx_buff.pos = 0;
<> 149:156823d33999 589 }
<> 149:156823d33999 590
<> 149:156823d33999 591 /**
<> 149:156823d33999 592 * Configure events
<> 149:156823d33999 593 *
<> 149:156823d33999 594 * @param obj The serial object
<> 149:156823d33999 595 * @param event The logical OR of the events to configure
<> 149:156823d33999 596 * @param enable Set to non-zero to enable events, or zero to disable them
<> 149:156823d33999 597 */
<> 149:156823d33999 598 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
<> 149:156823d33999 599 {
<> 149:156823d33999 600 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 601
<> 149:156823d33999 602 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
<> 149:156823d33999 603 if (enable) {
<> 149:156823d33999 604 obj_s->events |= event;
<> 149:156823d33999 605 } else {
<> 149:156823d33999 606 obj_s->events &= ~event;
<> 149:156823d33999 607 }
<> 149:156823d33999 608 }
<> 149:156823d33999 609
<> 149:156823d33999 610
<> 149:156823d33999 611 /**
<> 149:156823d33999 612 * Get index of serial object TX IRQ, relating it to the physical peripheral.
<> 149:156823d33999 613 *
<> 149:156823d33999 614 * @param obj pointer to serial object
<> 149:156823d33999 615 * @return internal NVIC TX IRQ index of U(S)ART peripheral
<> 149:156823d33999 616 */
<> 149:156823d33999 617 static IRQn_Type serial_get_irq_n(serial_t *obj)
<> 149:156823d33999 618 {
<> 149:156823d33999 619 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 620 IRQn_Type irq_n;
<> 149:156823d33999 621
<> 149:156823d33999 622 switch (obj_s->index) {
<> 149:156823d33999 623
<> 149:156823d33999 624 case 0:
<> 149:156823d33999 625 irq_n = USART1_IRQn;
<> 149:156823d33999 626 break;
<> 149:156823d33999 627
<> 149:156823d33999 628 case 1:
<> 149:156823d33999 629 irq_n = USART2_IRQn;
<> 149:156823d33999 630 break;
<> 149:156823d33999 631 #if defined(USART3_BASE)
<> 149:156823d33999 632 case 2:
<> 149:156823d33999 633 irq_n = USART3_IRQn;
<> 149:156823d33999 634 break;
<> 149:156823d33999 635 #endif
<> 149:156823d33999 636 #if defined(UART4_BASE)
<> 149:156823d33999 637 case 3:
<> 149:156823d33999 638 irq_n = UART4_IRQn;
<> 149:156823d33999 639 break;
<> 149:156823d33999 640 #endif
<> 149:156823d33999 641 #if defined(UART5_BASE)
<> 149:156823d33999 642 case 4:
<> 149:156823d33999 643 irq_n = UART5_IRQn;
<> 149:156823d33999 644 break;
<> 149:156823d33999 645 #endif
<> 149:156823d33999 646 case 5:
<> 149:156823d33999 647 irq_n = USART6_IRQn;
<> 149:156823d33999 648 break;
<> 149:156823d33999 649 #if defined(UART7_BASE)
<> 149:156823d33999 650 case 6:
<> 149:156823d33999 651 irq_n = UART7_IRQn;
<> 149:156823d33999 652 break;
<> 149:156823d33999 653 #endif
<> 149:156823d33999 654 #if defined(UART8_BASE)
<> 149:156823d33999 655 case 7:
<> 149:156823d33999 656 irq_n = UART8_IRQn;
<> 149:156823d33999 657 break;
<> 149:156823d33999 658 #endif
<> 149:156823d33999 659 default:
<> 149:156823d33999 660 irq_n = (IRQn_Type)0;
<> 149:156823d33999 661 }
<> 149:156823d33999 662
<> 149:156823d33999 663 return irq_n;
<> 149:156823d33999 664 }
<> 149:156823d33999 665
<> 149:156823d33999 666 /******************************************************************************
<> 149:156823d33999 667 * MBED API FUNCTIONS
<> 149:156823d33999 668 ******************************************************************************/
<> 149:156823d33999 669
<> 149:156823d33999 670 /**
<> 149:156823d33999 671 * Begin asynchronous TX transfer. The used buffer is specified in the serial
<> 149:156823d33999 672 * object, tx_buff
<> 149:156823d33999 673 *
<> 149:156823d33999 674 * @param obj The serial object
<> 149:156823d33999 675 * @param tx The buffer for sending
<> 149:156823d33999 676 * @param tx_length The number of words to transmit
<> 149:156823d33999 677 * @param tx_width The bit width of buffer word
<> 149:156823d33999 678 * @param handler The serial handler
<> 149:156823d33999 679 * @param event The logical OR of events to be registered
<> 149:156823d33999 680 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 681 * @return Returns number of data transfered, or 0 otherwise
<> 149:156823d33999 682 */
<> 149:156823d33999 683 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 684 {
<> 149:156823d33999 685 // TODO: DMA usage is currently ignored
<> 149:156823d33999 686 (void) hint;
<> 149:156823d33999 687
<> 149:156823d33999 688 // Check buffer is ok
<> 149:156823d33999 689 MBED_ASSERT(tx != (void*)0);
<> 149:156823d33999 690 MBED_ASSERT(tx_width == 8); // support only 8b width
<> 149:156823d33999 691
<> 149:156823d33999 692 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 693 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 694
<> 149:156823d33999 695 if (tx_length == 0) {
<> 149:156823d33999 696 return 0;
<> 149:156823d33999 697 }
<> 149:156823d33999 698
<> 149:156823d33999 699 // Set up buffer
<> 149:156823d33999 700 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
<> 149:156823d33999 701
<> 149:156823d33999 702 // Set up events
<> 149:156823d33999 703 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
<> 149:156823d33999 704 serial_enable_event(obj, event, 1); // Set only the wanted events
<> 149:156823d33999 705
<> 149:156823d33999 706 // Enable interrupt
<> 149:156823d33999 707 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 708 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 709 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 710 NVIC_SetPriority(irq_n, 1);
<> 149:156823d33999 711 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 712 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 713
<> 149:156823d33999 714 // the following function will enable UART_IT_TXE and error interrupts
<> 149:156823d33999 715 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
<> 149:156823d33999 716 return 0;
<> 149:156823d33999 717 }
<> 149:156823d33999 718
<> 149:156823d33999 719 return tx_length;
<> 149:156823d33999 720 }
<> 149:156823d33999 721
<> 149:156823d33999 722 /**
<> 149:156823d33999 723 * Begin asynchronous RX transfer (enable interrupt for data collecting)
<> 149:156823d33999 724 * The used buffer is specified in the serial object, rx_buff
<> 149:156823d33999 725 *
<> 149:156823d33999 726 * @param obj The serial object
<> 149:156823d33999 727 * @param rx The buffer for sending
<> 149:156823d33999 728 * @param rx_length The number of words to transmit
<> 149:156823d33999 729 * @param rx_width The bit width of buffer word
<> 149:156823d33999 730 * @param handler The serial handler
<> 149:156823d33999 731 * @param event The logical OR of events to be registered
<> 149:156823d33999 732 * @param handler The serial handler
<> 149:156823d33999 733 * @param char_match A character in range 0-254 to be matched
<> 149:156823d33999 734 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 735 */
<> 149:156823d33999 736 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 737 {
<> 149:156823d33999 738 // TODO: DMA usage is currently ignored
<> 149:156823d33999 739 (void) hint;
<> 149:156823d33999 740
<> 149:156823d33999 741 /* Sanity check arguments */
<> 149:156823d33999 742 MBED_ASSERT(obj);
<> 149:156823d33999 743 MBED_ASSERT(rx != (void*)0);
<> 149:156823d33999 744 MBED_ASSERT(rx_width == 8); // support only 8b width
<> 149:156823d33999 745
<> 149:156823d33999 746 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 747 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 748
<> 149:156823d33999 749 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
<> 149:156823d33999 750 serial_enable_event(obj, event, 1);
<> 149:156823d33999 751
<> 149:156823d33999 752 // set CharMatch
<> 149:156823d33999 753 obj->char_match = char_match;
<> 149:156823d33999 754
<> 149:156823d33999 755 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
<> 149:156823d33999 756
<> 149:156823d33999 757 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 758 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 759 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 760 NVIC_SetPriority(irq_n, 0);
<> 149:156823d33999 761 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 762 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 763
<> 149:156823d33999 764 // following HAL function will enable the RXNE interrupt + error interrupts
<> 149:156823d33999 765 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
<> 149:156823d33999 766 }
<> 149:156823d33999 767
<> 149:156823d33999 768 /**
<> 149:156823d33999 769 * Attempts to determine if the serial peripheral is already in use for TX
<> 149:156823d33999 770 *
<> 149:156823d33999 771 * @param obj The serial object
<> 149:156823d33999 772 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
<> 149:156823d33999 773 */
<> 149:156823d33999 774 uint8_t serial_tx_active(serial_t *obj)
<> 149:156823d33999 775 {
<> 149:156823d33999 776 MBED_ASSERT(obj);
<> 149:156823d33999 777
<> 149:156823d33999 778 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 779 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 780
<> 149:156823d33999 781 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
<> 149:156823d33999 782 }
<> 149:156823d33999 783
<> 149:156823d33999 784 /**
<> 149:156823d33999 785 * Attempts to determine if the serial peripheral is already in use for RX
<> 149:156823d33999 786 *
<> 149:156823d33999 787 * @param obj The serial object
<> 149:156823d33999 788 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
<> 149:156823d33999 789 */
<> 149:156823d33999 790 uint8_t serial_rx_active(serial_t *obj)
<> 149:156823d33999 791 {
<> 149:156823d33999 792 MBED_ASSERT(obj);
<> 149:156823d33999 793
<> 149:156823d33999 794 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 795 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 796
<> 149:156823d33999 797 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
<> 149:156823d33999 798 }
<> 149:156823d33999 799
<> 149:156823d33999 800 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 801 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 802 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_TCF);
<> 149:156823d33999 803 }
<> 149:156823d33999 804 }
<> 149:156823d33999 805
<> 149:156823d33999 806 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 807 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 808 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_PEF);
<> 149:156823d33999 809 }
<> 149:156823d33999 810 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 811 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_FEF);
<> 149:156823d33999 812 }
<> 149:156823d33999 813 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
<> 149:156823d33999 814 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_NEF);
<> 149:156823d33999 815 }
<> 149:156823d33999 816 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 817 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
<> 149:156823d33999 818 }
<> 149:156823d33999 819 }
<> 149:156823d33999 820
<> 149:156823d33999 821 /**
<> 149:156823d33999 822 * The asynchronous TX and RX handler.
<> 149:156823d33999 823 *
<> 149:156823d33999 824 * @param obj The serial object
<> 149:156823d33999 825 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
<> 149:156823d33999 826 */
<> 149:156823d33999 827 int serial_irq_handler_asynch(serial_t *obj)
<> 149:156823d33999 828 {
<> 149:156823d33999 829 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 830 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 831
<> 149:156823d33999 832 volatile int return_event = 0;
<> 149:156823d33999 833 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
<> 149:156823d33999 834 uint8_t i = 0;
<> 149:156823d33999 835
<> 149:156823d33999 836 // TX PART:
<> 149:156823d33999 837 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 838 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 839 // Return event SERIAL_EVENT_TX_COMPLETE if requested
<> 149:156823d33999 840 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
<> 149:156823d33999 841 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
<> 149:156823d33999 842 }
<> 149:156823d33999 843 }
<> 149:156823d33999 844 }
<> 149:156823d33999 845
<> 149:156823d33999 846 // Handle error events
<> 149:156823d33999 847 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 848 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 849 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
<> 149:156823d33999 850 }
<> 149:156823d33999 851 }
<> 149:156823d33999 852
<> 149:156823d33999 853 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 854 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 855 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
<> 149:156823d33999 856 }
<> 149:156823d33999 857 }
<> 149:156823d33999 858
<> 149:156823d33999 859 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 860 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 861 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
<> 149:156823d33999 862 }
<> 149:156823d33999 863 }
<> 149:156823d33999 864
<> 149:156823d33999 865 HAL_UART_IRQHandler(huart);
<> 149:156823d33999 866
<> 149:156823d33999 867 // Abort if an error occurs
<> 149:156823d33999 868 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
<> 149:156823d33999 869 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
<> 149:156823d33999 870 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
<> 149:156823d33999 871 return return_event;
<> 149:156823d33999 872 }
<> 149:156823d33999 873
<> 149:156823d33999 874 //RX PART
<> 149:156823d33999 875 if (huart->RxXferSize != 0) {
<> 149:156823d33999 876 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
<> 149:156823d33999 877 }
<> 149:156823d33999 878 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
<> 149:156823d33999 879 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
<> 149:156823d33999 880 }
<> 149:156823d33999 881
<> 149:156823d33999 882 // Check if char_match is present
<> 149:156823d33999 883 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
<> 149:156823d33999 884 if (buf != NULL) {
<> 149:156823d33999 885 for (i = 0; i < obj->rx_buff.pos; i++) {
<> 149:156823d33999 886 if (buf[i] == obj->char_match) {
<> 149:156823d33999 887 obj->rx_buff.pos = i;
<> 149:156823d33999 888 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
<> 149:156823d33999 889 serial_rx_abort_asynch(obj);
<> 149:156823d33999 890 break;
<> 149:156823d33999 891 }
<> 149:156823d33999 892 }
<> 149:156823d33999 893 }
<> 149:156823d33999 894 }
<> 149:156823d33999 895
<> 149:156823d33999 896 return return_event;
<> 149:156823d33999 897 }
<> 149:156823d33999 898
<> 149:156823d33999 899 /**
<> 149:156823d33999 900 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
<> 149:156823d33999 901 * flush TX hardware buffer if TX FIFO is used
<> 149:156823d33999 902 *
<> 149:156823d33999 903 * @param obj The serial object
<> 149:156823d33999 904 */
<> 149:156823d33999 905 void serial_tx_abort_asynch(serial_t *obj)
<> 149:156823d33999 906 {
<> 149:156823d33999 907 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 908 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 909
<> 149:156823d33999 910 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 911 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
<> 149:156823d33999 912
<> 149:156823d33999 913 // clear flags
<> 149:156823d33999 914 __HAL_UART_CLEAR_IT(huart, UART_FLAG_TC);
<> 149:156823d33999 915
<> 149:156823d33999 916 // reset states
<> 149:156823d33999 917 huart->TxXferCount = 0;
<> 149:156823d33999 918 // update handle state
<> 149:156823d33999 919 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 920 huart->gState = HAL_UART_STATE_BUSY_RX;
<> 149:156823d33999 921 } else {
<> 149:156823d33999 922 huart->gState = HAL_UART_STATE_READY;
<> 149:156823d33999 923 }
<> 149:156823d33999 924 }
<> 149:156823d33999 925
<> 149:156823d33999 926 /**
<> 149:156823d33999 927 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
<> 149:156823d33999 928 * flush RX hardware buffer if RX FIFO is used
<> 149:156823d33999 929 *
<> 149:156823d33999 930 * @param obj The serial object
<> 149:156823d33999 931 */
<> 149:156823d33999 932 void serial_rx_abort_asynch(serial_t *obj)
<> 149:156823d33999 933 {
<> 149:156823d33999 934 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 935 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 936
<> 149:156823d33999 937 // disable interrupts
<> 149:156823d33999 938 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 939 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
<> 149:156823d33999 940 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
<> 149:156823d33999 941
<> 149:156823d33999 942 // clear flags
<> 149:156823d33999 943 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE
<> 149:156823d33999 944 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_PEF);
<> 149:156823d33999 945 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_FEF);
<> 149:156823d33999 946 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_NEF);
<> 149:156823d33999 947 __HAL_UART_CLEAR_IT(huart, UART_CLEAR_OREF);
<> 149:156823d33999 948
<> 149:156823d33999 949 // reset states
<> 149:156823d33999 950 huart->RxXferCount = 0;
<> 149:156823d33999 951 // update handle state
<> 149:156823d33999 952 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 953 huart->RxState = HAL_UART_STATE_BUSY_TX;
<> 149:156823d33999 954 } else {
<> 149:156823d33999 955 huart->RxState = HAL_UART_STATE_READY;
<> 149:156823d33999 956 }
<> 149:156823d33999 957 }
<> 149:156823d33999 958
<> 149:156823d33999 959 #endif
<> 149:156823d33999 960
<> 149:156823d33999 961 #if DEVICE_SERIAL_FC
<> 149:156823d33999 962
<> 149:156823d33999 963 /**
<> 149:156823d33999 964 * Set HW Control Flow
<> 149:156823d33999 965 * @param obj The serial object
<> 149:156823d33999 966 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
<> 149:156823d33999 967 * @param rxflow Pin for the rxflow
<> 149:156823d33999 968 * @param txflow Pin for the txflow
<> 149:156823d33999 969 */
<> 149:156823d33999 970 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
<> 149:156823d33999 971 {
<> 149:156823d33999 972 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 973
<> 149:156823d33999 974 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 975 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 976 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
<> 149:156823d33999 977
<> 149:156823d33999 978 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 979 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
<> 149:156823d33999 980 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 981
<> 149:156823d33999 982 if(type == FlowControlNone) {
<> 149:156823d33999 983 // Disable hardware flow control
<> 149:156823d33999 984 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 985 }
<> 149:156823d33999 986 if (type == FlowControlRTS) {
<> 149:156823d33999 987 // Enable RTS
<> 149:156823d33999 988 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 989 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
<> 149:156823d33999 990 obj_s->pin_rts = rxflow;
<> 149:156823d33999 991 // Enable the pin for RTS function
<> 149:156823d33999 992 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 993 }
<> 149:156823d33999 994 if (type == FlowControlCTS) {
<> 149:156823d33999 995 // Enable CTS
<> 149:156823d33999 996 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 997 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
<> 149:156823d33999 998 obj_s->pin_cts = txflow;
<> 149:156823d33999 999 // Enable the pin for CTS function
<> 149:156823d33999 1000 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 1001 }
<> 149:156823d33999 1002 if (type == FlowControlRTSCTS) {
<> 149:156823d33999 1003 // Enable CTS & RTS
<> 149:156823d33999 1004 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 1005 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 1006 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
<> 149:156823d33999 1007 obj_s->pin_rts = rxflow;
<> 149:156823d33999 1008 obj_s->pin_cts = txflow;
<> 149:156823d33999 1009 // Enable the pin for CTS function
<> 149:156823d33999 1010 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 1011 // Enable the pin for RTS function
<> 149:156823d33999 1012 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 1013 }
<> 149:156823d33999 1014
<> 149:156823d33999 1015 init_uart(obj);
<> 149:156823d33999 1016 }
<> 149:156823d33999 1017
<> 149:156823d33999 1018 #endif
<> 149:156823d33999 1019
<> 149:156823d33999 1020 #endif