Iftikhar Aziz / mbed-dev

4545

Dependents:   LSS_Rev_1

Fork of mbed-dev by Umar Naeem

targets/TARGET_STM/TARGET_STM32L4/serial_api.c@149:156823d33999, 2016-10-28 (annotated)

Committer:
<>
Date:
Fri Oct 28 11:17:30 2016 +0100
Revision:
149:156823d33999
This updates the lib to the mbed lib v128



NOTE: This release includes a restructuring of the file and directory locations and thus some

include paths in your code may need updating accordingly.

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 "mbed_error.h"
<> 149:156823d33999 38 #include <string.h>
<> 149:156823d33999 39 #include "PeripheralPins.h"
<> 149:156823d33999 40
<> 149:156823d33999 41 #define UART_NUM (6)
<> 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
<> 149:156823d33999 116 #if defined(USART3_BASE)
<> 149:156823d33999 117 if (obj_s->uart == UART_3) {
<> 149:156823d33999 118 __HAL_RCC_USART3_FORCE_RESET();
<> 149:156823d33999 119 __HAL_RCC_USART3_RELEASE_RESET();
<> 149:156823d33999 120 __HAL_RCC_USART3_CLK_ENABLE();
<> 149:156823d33999 121 obj_s->index = 2;
<> 149:156823d33999 122 }
<> 149:156823d33999 123 #endif
<> 149:156823d33999 124
<> 149:156823d33999 125 #if defined(UART4_BASE)
<> 149:156823d33999 126 if (obj_s->uart == UART_4) {
<> 149:156823d33999 127 __HAL_RCC_UART4_FORCE_RESET();
<> 149:156823d33999 128 __HAL_RCC_UART4_RELEASE_RESET();
<> 149:156823d33999 129 __HAL_RCC_UART4_CLK_ENABLE();
<> 149:156823d33999 130 obj_s->index = 3;
<> 149:156823d33999 131 }
<> 149:156823d33999 132 #endif
<> 149:156823d33999 133
<> 149:156823d33999 134 #if defined(UART5_BASE)
<> 149:156823d33999 135 if (obj_s->uart == 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 }
<> 149:156823d33999 141 #endif
<> 149:156823d33999 142
<> 149:156823d33999 143 #if defined(LPUART1_BASE)
<> 149:156823d33999 144 if (obj_s->uart == LPUART_1) {
<> 149:156823d33999 145 __HAL_RCC_LPUART1_FORCE_RESET();
<> 149:156823d33999 146 __HAL_RCC_LPUART1_RELEASE_RESET();
<> 149:156823d33999 147 __HAL_RCC_LPUART1_CLK_ENABLE();
<> 149:156823d33999 148 obj_s->index = 5;
<> 149:156823d33999 149 }
<> 149:156823d33999 150 #endif
<> 149:156823d33999 151
<> 149:156823d33999 152 // Configure UART pins
<> 149:156823d33999 153 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 154 pinmap_pinout(rx, PinMap_UART_RX);
<> 149:156823d33999 155
<> 149:156823d33999 156 if (tx != NC) {
<> 149:156823d33999 157 pin_mode(tx, PullUp);
<> 149:156823d33999 158 }
<> 149:156823d33999 159 if (rx != NC) {
<> 149:156823d33999 160 pin_mode(rx, PullUp);
<> 149:156823d33999 161 }
<> 149:156823d33999 162
<> 149:156823d33999 163 // Configure UART
<> 149:156823d33999 164 obj_s->baudrate = 9600;
<> 149:156823d33999 165 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 166 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 167 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 168
<> 149:156823d33999 169 #if DEVICE_SERIAL_FC
<> 149:156823d33999 170 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 171 #endif
<> 149:156823d33999 172
<> 149:156823d33999 173 obj_s->pin_tx = tx;
<> 149:156823d33999 174 obj_s->pin_rx = rx;
<> 149:156823d33999 175
<> 149:156823d33999 176 init_uart(obj);
<> 149:156823d33999 177
<> 149:156823d33999 178 // For stdio management
<> 149:156823d33999 179 if (obj_s->uart == STDIO_UART) {
<> 149:156823d33999 180 stdio_uart_inited = 1;
<> 149:156823d33999 181 memcpy(&stdio_uart, obj, sizeof(serial_t));
<> 149:156823d33999 182 }
<> 149:156823d33999 183 }
<> 149:156823d33999 184
<> 149:156823d33999 185 void serial_free(serial_t *obj)
<> 149:156823d33999 186 {
<> 149:156823d33999 187 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 188
<> 149:156823d33999 189 // Reset UART and disable clock
<> 149:156823d33999 190 if (obj_s->uart == UART_1) {
<> 149:156823d33999 191 __HAL_RCC_USART1_FORCE_RESET();
<> 149:156823d33999 192 __HAL_RCC_USART1_RELEASE_RESET();
<> 149:156823d33999 193 __HAL_RCC_USART1_CLK_DISABLE();
<> 149:156823d33999 194 }
<> 149:156823d33999 195
<> 149:156823d33999 196 if (obj_s->uart == UART_2) {
<> 149:156823d33999 197 __HAL_RCC_USART2_FORCE_RESET();
<> 149:156823d33999 198 __HAL_RCC_USART2_RELEASE_RESET();
<> 149:156823d33999 199 __HAL_RCC_USART2_CLK_DISABLE();
<> 149:156823d33999 200 }
<> 149:156823d33999 201
<> 149:156823d33999 202 #if defined(USART3_BASE)
<> 149:156823d33999 203 if (obj_s->uart == UART_3) {
<> 149:156823d33999 204 __HAL_RCC_USART3_FORCE_RESET();
<> 149:156823d33999 205 __HAL_RCC_USART3_RELEASE_RESET();
<> 149:156823d33999 206 __HAL_RCC_USART3_CLK_DISABLE();
<> 149:156823d33999 207 }
<> 149:156823d33999 208 #endif
<> 149:156823d33999 209
<> 149:156823d33999 210 #if defined(UART4_BASE)
<> 149:156823d33999 211 if (obj_s->uart == UART_4) {
<> 149:156823d33999 212 __HAL_RCC_UART4_FORCE_RESET();
<> 149:156823d33999 213 __HAL_RCC_UART4_RELEASE_RESET();
<> 149:156823d33999 214 __HAL_RCC_UART4_CLK_DISABLE();
<> 149:156823d33999 215 }
<> 149:156823d33999 216 #endif
<> 149:156823d33999 217
<> 149:156823d33999 218 #if defined(UART5_BASE)
<> 149:156823d33999 219 if (obj_s->uart == UART_5) {
<> 149:156823d33999 220 __HAL_RCC_UART5_FORCE_RESET();
<> 149:156823d33999 221 __HAL_RCC_UART5_RELEASE_RESET();
<> 149:156823d33999 222 __HAL_RCC_UART5_CLK_DISABLE();
<> 149:156823d33999 223 }
<> 149:156823d33999 224 #endif
<> 149:156823d33999 225
<> 149:156823d33999 226 #if defined(LPUART1_BASE)
<> 149:156823d33999 227 if (obj_s->uart == LPUART_1) {
<> 149:156823d33999 228 __HAL_RCC_LPUART1_FORCE_RESET();
<> 149:156823d33999 229 __HAL_RCC_LPUART1_RELEASE_RESET();
<> 149:156823d33999 230 __HAL_RCC_LPUART1_CLK_DISABLE();
<> 149:156823d33999 231 }
<> 149:156823d33999 232 #endif
<> 149:156823d33999 233
<> 149:156823d33999 234 // Configure GPIOs
<> 149:156823d33999 235 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 236 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
<> 149:156823d33999 237
<> 149:156823d33999 238 serial_irq_ids[obj_s->index] = 0;
<> 149:156823d33999 239 }
<> 149:156823d33999 240
<> 149:156823d33999 241 void serial_baud(serial_t *obj, int baudrate)
<> 149:156823d33999 242 {
<> 149:156823d33999 243 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 244
<> 149:156823d33999 245 obj_s->baudrate = baudrate;
<> 149:156823d33999 246 init_uart(obj);
<> 149:156823d33999 247 }
<> 149:156823d33999 248
<> 149:156823d33999 249 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
<> 149:156823d33999 250 {
<> 149:156823d33999 251 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 252
<> 149:156823d33999 253 if (data_bits == 9) {
<> 149:156823d33999 254 obj_s->databits = UART_WORDLENGTH_9B;
<> 149:156823d33999 255 } else {
<> 149:156823d33999 256 obj_s->databits = UART_WORDLENGTH_8B;
<> 149:156823d33999 257 }
<> 149:156823d33999 258
<> 149:156823d33999 259 switch (parity) {
<> 149:156823d33999 260 case ParityOdd:
<> 149:156823d33999 261 obj_s->parity = UART_PARITY_ODD;
<> 149:156823d33999 262 break;
<> 149:156823d33999 263 case ParityEven:
<> 149:156823d33999 264 obj_s->parity = UART_PARITY_EVEN;
<> 149:156823d33999 265 break;
<> 149:156823d33999 266 default: // ParityNone
<> 149:156823d33999 267 case ParityForced0: // unsupported!
<> 149:156823d33999 268 case ParityForced1: // unsupported!
<> 149:156823d33999 269 obj_s->parity = UART_PARITY_NONE;
<> 149:156823d33999 270 break;
<> 149:156823d33999 271 }
<> 149:156823d33999 272
<> 149:156823d33999 273 if (stop_bits == 2) {
<> 149:156823d33999 274 obj_s->stopbits = UART_STOPBITS_2;
<> 149:156823d33999 275 } else {
<> 149:156823d33999 276 obj_s->stopbits = UART_STOPBITS_1;
<> 149:156823d33999 277 }
<> 149:156823d33999 278
<> 149:156823d33999 279 init_uart(obj);
<> 149:156823d33999 280 }
<> 149:156823d33999 281
<> 149:156823d33999 282 /******************************************************************************
<> 149:156823d33999 283 * INTERRUPTS HANDLING
<> 149:156823d33999 284 ******************************************************************************/
<> 149:156823d33999 285
<> 149:156823d33999 286 static void uart_irq(int id)
<> 149:156823d33999 287 {
<> 149:156823d33999 288 UART_HandleTypeDef * huart = &uart_handlers[id];
<> 149:156823d33999 289
<> 149:156823d33999 290 if (serial_irq_ids[id] != 0) {
<> 149:156823d33999 291 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 292 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 293 irq_handler(serial_irq_ids[id], TxIrq);
<> 149:156823d33999 294 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 295 }
<> 149:156823d33999 296 }
<> 149:156823d33999 297 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
<> 149:156823d33999 298 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
<> 149:156823d33999 299 irq_handler(serial_irq_ids[id], RxIrq);
<> 149:156823d33999 300 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 301 }
<> 149:156823d33999 302 }
<> 149:156823d33999 303 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 304 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
<> 149:156823d33999 305 volatile uint32_t tmpval = huart->Instance->RDR; // Clear ORE flag
<> 149:156823d33999 306 }
<> 149:156823d33999 307 }
<> 149:156823d33999 308 }
<> 149:156823d33999 309 }
<> 149:156823d33999 310
<> 149:156823d33999 311 static void uart1_irq(void)
<> 149:156823d33999 312 {
<> 149:156823d33999 313 uart_irq(0);
<> 149:156823d33999 314 }
<> 149:156823d33999 315
<> 149:156823d33999 316 static void uart2_irq(void)
<> 149:156823d33999 317 {
<> 149:156823d33999 318 uart_irq(1);
<> 149:156823d33999 319 }
<> 149:156823d33999 320
<> 149:156823d33999 321 #if defined(USART3_BASE)
<> 149:156823d33999 322 static void uart3_irq(void)
<> 149:156823d33999 323 {
<> 149:156823d33999 324 uart_irq(2);
<> 149:156823d33999 325 }
<> 149:156823d33999 326 #endif
<> 149:156823d33999 327
<> 149:156823d33999 328 #if defined(UART4_BASE)
<> 149:156823d33999 329 static void uart4_irq(void)
<> 149:156823d33999 330 {
<> 149:156823d33999 331 uart_irq(3);
<> 149:156823d33999 332 }
<> 149:156823d33999 333 #endif
<> 149:156823d33999 334
<> 149:156823d33999 335 #if defined(UART5_BASE)
<> 149:156823d33999 336 static void uart5_irq(void)
<> 149:156823d33999 337 {
<> 149:156823d33999 338 uart_irq(4);
<> 149:156823d33999 339 }
<> 149:156823d33999 340 #endif
<> 149:156823d33999 341
<> 149:156823d33999 342 #if defined(LPUART1_BASE)
<> 149:156823d33999 343 static void lpuart1_irq(void)
<> 149:156823d33999 344 {
<> 149:156823d33999 345 uart_irq(5);
<> 149:156823d33999 346 }
<> 149:156823d33999 347 #endif
<> 149:156823d33999 348
<> 149:156823d33999 349 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
<> 149:156823d33999 350 {
<> 149:156823d33999 351 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 352
<> 149:156823d33999 353 irq_handler = handler;
<> 149:156823d33999 354 serial_irq_ids[obj_s->index] = id;
<> 149:156823d33999 355 }
<> 149:156823d33999 356
<> 149:156823d33999 357 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
<> 149:156823d33999 358 {
<> 149:156823d33999 359 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 360 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 361 IRQn_Type irq_n = (IRQn_Type)0;
<> 149:156823d33999 362 uint32_t vector = 0;
<> 149:156823d33999 363
<> 149:156823d33999 364 if (obj_s->uart == UART_1) {
<> 149:156823d33999 365 irq_n = USART1_IRQn;
<> 149:156823d33999 366 vector = (uint32_t)&uart1_irq;
<> 149:156823d33999 367 }
<> 149:156823d33999 368
<> 149:156823d33999 369 if (obj_s->uart == UART_2) {
<> 149:156823d33999 370 irq_n = USART2_IRQn;
<> 149:156823d33999 371 vector = (uint32_t)&uart2_irq;
<> 149:156823d33999 372 }
<> 149:156823d33999 373 #if defined(USART3_BASE)
<> 149:156823d33999 374 if (obj_s->uart == UART_3) {
<> 149:156823d33999 375 irq_n = USART3_IRQn;
<> 149:156823d33999 376 vector = (uint32_t)&uart3_irq;
<> 149:156823d33999 377 }
<> 149:156823d33999 378 #endif
<> 149:156823d33999 379 #if defined(UART4_BASE)
<> 149:156823d33999 380 if (obj_s->uart == UART_4) {
<> 149:156823d33999 381 irq_n = UART4_IRQn;
<> 149:156823d33999 382 vector = (uint32_t)&uart4_irq;
<> 149:156823d33999 383 }
<> 149:156823d33999 384 #endif
<> 149:156823d33999 385
<> 149:156823d33999 386 #if defined(UART5_BASE)
<> 149:156823d33999 387 if (obj_s->uart == UART_5) {
<> 149:156823d33999 388 irq_n = UART5_IRQn;
<> 149:156823d33999 389 vector = (uint32_t)&uart5_irq;
<> 149:156823d33999 390 }
<> 149:156823d33999 391 #endif
<> 149:156823d33999 392
<> 149:156823d33999 393 #if defined(LPUART1_BASE)
<> 149:156823d33999 394 if (obj_s->uart == LPUART_1) {
<> 149:156823d33999 395 irq_n = LPUART1_IRQn;
<> 149:156823d33999 396 vector = (uint32_t)&lpuart1_irq;
<> 149:156823d33999 397 }
<> 149:156823d33999 398 #endif
<> 149:156823d33999 399
<> 149:156823d33999 400 if (enable) {
<> 149:156823d33999 401 if (irq == RxIrq) {
<> 149:156823d33999 402 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 403 } else { // TxIrq
<> 149:156823d33999 404 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 405 }
<> 149:156823d33999 406 NVIC_SetVector(irq_n, vector);
<> 149:156823d33999 407 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 408
<> 149:156823d33999 409 } else { // disable
<> 149:156823d33999 410 int all_disabled = 0;
<> 149:156823d33999 411 if (irq == RxIrq) {
<> 149:156823d33999 412 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 413 // Check if TxIrq is disabled too
<> 149:156823d33999 414 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
<> 149:156823d33999 415 all_disabled = 1;
<> 149:156823d33999 416 }
<> 149:156823d33999 417 } else { // TxIrq
<> 149:156823d33999 418 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 419 // Check if RxIrq is disabled too
<> 149:156823d33999 420 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
<> 149:156823d33999 421 all_disabled = 1;
<> 149:156823d33999 422 }
<> 149:156823d33999 423 }
<> 149:156823d33999 424
<> 149:156823d33999 425 if (all_disabled) {
<> 149:156823d33999 426 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 427 }
<> 149:156823d33999 428 }
<> 149:156823d33999 429 }
<> 149:156823d33999 430
<> 149:156823d33999 431 /******************************************************************************
<> 149:156823d33999 432 * READ/WRITE
<> 149:156823d33999 433 ******************************************************************************/
<> 149:156823d33999 434
<> 149:156823d33999 435 int serial_getc(serial_t *obj)
<> 149:156823d33999 436 {
<> 149:156823d33999 437 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 438 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 439
<> 149:156823d33999 440 while (!serial_readable(obj));
<> 149:156823d33999 441 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 442 return (int)(huart->Instance->RDR & (uint8_t)0xFF);
<> 149:156823d33999 443 } else {
<> 149:156823d33999 444 return (int)(huart->Instance->RDR & (uint16_t)0x1FF);
<> 149:156823d33999 445 }
<> 149:156823d33999 446 }
<> 149:156823d33999 447
<> 149:156823d33999 448 void serial_putc(serial_t *obj, int c)
<> 149:156823d33999 449 {
<> 149:156823d33999 450 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 451 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 452
<> 149:156823d33999 453 while (!serial_writable(obj));
<> 149:156823d33999 454 if (obj_s->databits == UART_WORDLENGTH_8B) {
<> 149:156823d33999 455 huart->Instance->TDR = (uint8_t)(c & (uint8_t)0xFF);
<> 149:156823d33999 456 } else {
<> 149:156823d33999 457 huart->Instance->TDR = (uint16_t)(c & (uint16_t)0x1FF);
<> 149:156823d33999 458 }
<> 149:156823d33999 459 }
<> 149:156823d33999 460
<> 149:156823d33999 461 int serial_readable(serial_t *obj)
<> 149:156823d33999 462 {
<> 149:156823d33999 463 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 464 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 465
<> 149:156823d33999 466 // Check if data is received
<> 149:156823d33999 467 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
<> 149:156823d33999 468 }
<> 149:156823d33999 469
<> 149:156823d33999 470 int serial_writable(serial_t *obj)
<> 149:156823d33999 471 {
<> 149:156823d33999 472 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 473 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 474
<> 149:156823d33999 475 // Check if data is transmitted
<> 149:156823d33999 476 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
<> 149:156823d33999 477 }
<> 149:156823d33999 478
<> 149:156823d33999 479 void serial_clear(serial_t *obj)
<> 149:156823d33999 480 {
<> 149:156823d33999 481 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 482 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 483
<> 149:156823d33999 484 huart->TxXferCount = 0;
<> 149:156823d33999 485 huart->RxXferCount = 0;
<> 149:156823d33999 486 }
<> 149:156823d33999 487
<> 149:156823d33999 488 void serial_pinout_tx(PinName tx)
<> 149:156823d33999 489 {
<> 149:156823d33999 490 pinmap_pinout(tx, PinMap_UART_TX);
<> 149:156823d33999 491 }
<> 149:156823d33999 492
<> 149:156823d33999 493 void serial_break_set(serial_t *obj)
<> 149:156823d33999 494 {
<> 149:156823d33999 495 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 496 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 497
<> 149:156823d33999 498 HAL_LIN_SendBreak(huart);
<> 149:156823d33999 499 }
<> 149:156823d33999 500
<> 149:156823d33999 501 void serial_break_clear(serial_t *obj)
<> 149:156823d33999 502 {
<> 149:156823d33999 503 (void)obj;
<> 149:156823d33999 504 }
<> 149:156823d33999 505
<> 149:156823d33999 506 #if DEVICE_SERIAL_ASYNCH
<> 149:156823d33999 507
<> 149:156823d33999 508 /******************************************************************************
<> 149:156823d33999 509 * LOCAL HELPER FUNCTIONS
<> 149:156823d33999 510 ******************************************************************************/
<> 149:156823d33999 511
<> 149:156823d33999 512 /**
<> 149:156823d33999 513 * Configure the TX buffer for an asynchronous write serial transaction
<> 149:156823d33999 514 *
<> 149:156823d33999 515 * @param obj The serial object.
<> 149:156823d33999 516 * @param tx The buffer for sending.
<> 149:156823d33999 517 * @param tx_length The number of words to transmit.
<> 149:156823d33999 518 */
<> 149:156823d33999 519 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
<> 149:156823d33999 520 {
<> 149:156823d33999 521 (void)width;
<> 149:156823d33999 522
<> 149:156823d33999 523 // Exit if a transmit is already on-going
<> 149:156823d33999 524 if (serial_tx_active(obj)) {
<> 149:156823d33999 525 return;
<> 149:156823d33999 526 }
<> 149:156823d33999 527
<> 149:156823d33999 528 obj->tx_buff.buffer = tx;
<> 149:156823d33999 529 obj->tx_buff.length = tx_length;
<> 149:156823d33999 530 obj->tx_buff.pos = 0;
<> 149:156823d33999 531 }
<> 149:156823d33999 532
<> 149:156823d33999 533 /**
<> 149:156823d33999 534 * Configure the RX buffer for an asynchronous write serial transaction
<> 149:156823d33999 535 *
<> 149:156823d33999 536 * @param obj The serial object.
<> 149:156823d33999 537 * @param tx The buffer for sending.
<> 149:156823d33999 538 * @param tx_length The number of words to transmit.
<> 149:156823d33999 539 */
<> 149:156823d33999 540 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
<> 149:156823d33999 541 {
<> 149:156823d33999 542 (void)width;
<> 149:156823d33999 543
<> 149:156823d33999 544 // Exit if a reception is already on-going
<> 149:156823d33999 545 if (serial_rx_active(obj)) {
<> 149:156823d33999 546 return;
<> 149:156823d33999 547 }
<> 149:156823d33999 548
<> 149:156823d33999 549 obj->rx_buff.buffer = rx;
<> 149:156823d33999 550 obj->rx_buff.length = rx_length;
<> 149:156823d33999 551 obj->rx_buff.pos = 0;
<> 149:156823d33999 552 }
<> 149:156823d33999 553
<> 149:156823d33999 554 /**
<> 149:156823d33999 555 * Configure events
<> 149:156823d33999 556 *
<> 149:156823d33999 557 * @param obj The serial object
<> 149:156823d33999 558 * @param event The logical OR of the events to configure
<> 149:156823d33999 559 * @param enable Set to non-zero to enable events, or zero to disable them
<> 149:156823d33999 560 */
<> 149:156823d33999 561 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
<> 149:156823d33999 562 {
<> 149:156823d33999 563 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 564
<> 149:156823d33999 565 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
<> 149:156823d33999 566 if (enable) {
<> 149:156823d33999 567 obj_s->events |= event;
<> 149:156823d33999 568 } else {
<> 149:156823d33999 569 obj_s->events &= ~event;
<> 149:156823d33999 570 }
<> 149:156823d33999 571 }
<> 149:156823d33999 572
<> 149:156823d33999 573
<> 149:156823d33999 574 /**
<> 149:156823d33999 575 * Get index of serial object TX IRQ, relating it to the physical peripheral.
<> 149:156823d33999 576 *
<> 149:156823d33999 577 * @param obj pointer to serial object
<> 149:156823d33999 578 * @return internal NVIC TX IRQ index of U(S)ART peripheral
<> 149:156823d33999 579 */
<> 149:156823d33999 580 static IRQn_Type serial_get_irq_n(serial_t *obj)
<> 149:156823d33999 581 {
<> 149:156823d33999 582 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 583 IRQn_Type irq_n;
<> 149:156823d33999 584
<> 149:156823d33999 585 switch (obj_s->index) {
<> 149:156823d33999 586 case 0:
<> 149:156823d33999 587 irq_n = USART1_IRQn;
<> 149:156823d33999 588 break;
<> 149:156823d33999 589
<> 149:156823d33999 590 case 1:
<> 149:156823d33999 591 irq_n = USART2_IRQn;
<> 149:156823d33999 592 break;
<> 149:156823d33999 593
<> 149:156823d33999 594 case 2:
<> 149:156823d33999 595 irq_n = USART3_IRQn;
<> 149:156823d33999 596 break;
<> 149:156823d33999 597 #if defined(UART4_BASE)
<> 149:156823d33999 598 case 3:
<> 149:156823d33999 599 irq_n = UART4_IRQn;
<> 149:156823d33999 600 break;
<> 149:156823d33999 601 #endif
<> 149:156823d33999 602 #if defined(UART5_BASE)
<> 149:156823d33999 603 case 4:
<> 149:156823d33999 604 irq_n = UART5_IRQn;
<> 149:156823d33999 605 break;
<> 149:156823d33999 606 #endif
<> 149:156823d33999 607 #if defined(LPUART1_BASE)
<> 149:156823d33999 608 case 5:
<> 149:156823d33999 609 irq_n = LPUART1_IRQn;
<> 149:156823d33999 610 break;
<> 149:156823d33999 611 #endif
<> 149:156823d33999 612
<> 149:156823d33999 613 default:
<> 149:156823d33999 614 irq_n = (IRQn_Type)0;
<> 149:156823d33999 615 }
<> 149:156823d33999 616
<> 149:156823d33999 617 return irq_n;
<> 149:156823d33999 618 }
<> 149:156823d33999 619
<> 149:156823d33999 620 /******************************************************************************
<> 149:156823d33999 621 * MBED API FUNCTIONS
<> 149:156823d33999 622 ******************************************************************************/
<> 149:156823d33999 623
<> 149:156823d33999 624 /**
<> 149:156823d33999 625 * Begin asynchronous TX transfer. The used buffer is specified in the serial
<> 149:156823d33999 626 * object, tx_buff
<> 149:156823d33999 627 *
<> 149:156823d33999 628 * @param obj The serial object
<> 149:156823d33999 629 * @param tx The buffer for sending
<> 149:156823d33999 630 * @param tx_length The number of words to transmit
<> 149:156823d33999 631 * @param tx_width The bit width of buffer word
<> 149:156823d33999 632 * @param handler The serial handler
<> 149:156823d33999 633 * @param event The logical OR of events to be registered
<> 149:156823d33999 634 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 635 * @return Returns number of data transfered, or 0 otherwise
<> 149:156823d33999 636 */
<> 149:156823d33999 637 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 638 {
<> 149:156823d33999 639 // TODO: DMA usage is currently ignored
<> 149:156823d33999 640 (void) hint;
<> 149:156823d33999 641
<> 149:156823d33999 642 // Check buffer is ok
<> 149:156823d33999 643 MBED_ASSERT(tx != (void*)0);
<> 149:156823d33999 644 MBED_ASSERT(tx_width == 8); // support only 8b width
<> 149:156823d33999 645
<> 149:156823d33999 646 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 647 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 648
<> 149:156823d33999 649 if (tx_length == 0) {
<> 149:156823d33999 650 return 0;
<> 149:156823d33999 651 }
<> 149:156823d33999 652
<> 149:156823d33999 653 // Set up buffer
<> 149:156823d33999 654 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
<> 149:156823d33999 655
<> 149:156823d33999 656 // Set up events
<> 149:156823d33999 657 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
<> 149:156823d33999 658 serial_enable_event(obj, event, 1); // Set only the wanted events
<> 149:156823d33999 659
<> 149:156823d33999 660 // Enable interrupt
<> 149:156823d33999 661 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 662 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 663 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 664 NVIC_SetPriority(irq_n, 1);
<> 149:156823d33999 665 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 666 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 667
<> 149:156823d33999 668 // the following function will enable UART_IT_TXE and error interrupts
<> 149:156823d33999 669 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
<> 149:156823d33999 670 return 0;
<> 149:156823d33999 671 }
<> 149:156823d33999 672
<> 149:156823d33999 673 return tx_length;
<> 149:156823d33999 674 }
<> 149:156823d33999 675
<> 149:156823d33999 676 /**
<> 149:156823d33999 677 * Begin asynchronous RX transfer (enable interrupt for data collecting)
<> 149:156823d33999 678 * The used buffer is specified in the serial object, rx_buff
<> 149:156823d33999 679 *
<> 149:156823d33999 680 * @param obj The serial object
<> 149:156823d33999 681 * @param rx The buffer for sending
<> 149:156823d33999 682 * @param rx_length The number of words to transmit
<> 149:156823d33999 683 * @param rx_width The bit width of buffer word
<> 149:156823d33999 684 * @param handler The serial handler
<> 149:156823d33999 685 * @param event The logical OR of events to be registered
<> 149:156823d33999 686 * @param handler The serial handler
<> 149:156823d33999 687 * @param char_match A character in range 0-254 to be matched
<> 149:156823d33999 688 * @param hint A suggestion for how to use DMA with this transfer
<> 149:156823d33999 689 */
<> 149:156823d33999 690 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 691 {
<> 149:156823d33999 692 // TODO: DMA usage is currently ignored
<> 149:156823d33999 693 (void) hint;
<> 149:156823d33999 694
<> 149:156823d33999 695 /* Sanity check arguments */
<> 149:156823d33999 696 MBED_ASSERT(obj);
<> 149:156823d33999 697 MBED_ASSERT(rx != (void*)0);
<> 149:156823d33999 698 MBED_ASSERT(rx_width == 8); // support only 8b width
<> 149:156823d33999 699
<> 149:156823d33999 700 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 701 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 702
<> 149:156823d33999 703 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
<> 149:156823d33999 704 serial_enable_event(obj, event, 1);
<> 149:156823d33999 705
<> 149:156823d33999 706 // set CharMatch
<> 149:156823d33999 707 obj->char_match = char_match;
<> 149:156823d33999 708
<> 149:156823d33999 709 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
<> 149:156823d33999 710
<> 149:156823d33999 711 IRQn_Type irq_n = serial_get_irq_n(obj);
<> 149:156823d33999 712 NVIC_ClearPendingIRQ(irq_n);
<> 149:156823d33999 713 NVIC_DisableIRQ(irq_n);
<> 149:156823d33999 714 NVIC_SetPriority(irq_n, 0);
<> 149:156823d33999 715 NVIC_SetVector(irq_n, (uint32_t)handler);
<> 149:156823d33999 716 NVIC_EnableIRQ(irq_n);
<> 149:156823d33999 717
<> 149:156823d33999 718 // following HAL function will enable the RXNE interrupt + error interrupts
<> 149:156823d33999 719 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
<> 149:156823d33999 720 }
<> 149:156823d33999 721
<> 149:156823d33999 722 /**
<> 149:156823d33999 723 * Attempts to determine if the serial peripheral is already in use for TX
<> 149:156823d33999 724 *
<> 149:156823d33999 725 * @param obj The serial object
<> 149:156823d33999 726 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
<> 149:156823d33999 727 */
<> 149:156823d33999 728 uint8_t serial_tx_active(serial_t *obj)
<> 149:156823d33999 729 {
<> 149:156823d33999 730 MBED_ASSERT(obj);
<> 149:156823d33999 731
<> 149:156823d33999 732 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 733 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 734
<> 149:156823d33999 735 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
<> 149:156823d33999 736 }
<> 149:156823d33999 737
<> 149:156823d33999 738 /**
<> 149:156823d33999 739 * Attempts to determine if the serial peripheral is already in use for RX
<> 149:156823d33999 740 *
<> 149:156823d33999 741 * @param obj The serial object
<> 149:156823d33999 742 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
<> 149:156823d33999 743 */
<> 149:156823d33999 744 uint8_t serial_rx_active(serial_t *obj)
<> 149:156823d33999 745 {
<> 149:156823d33999 746 MBED_ASSERT(obj);
<> 149:156823d33999 747
<> 149:156823d33999 748 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 749 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 750
<> 149:156823d33999 751 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
<> 149:156823d33999 752 }
<> 149:156823d33999 753
<> 149:156823d33999 754 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 755 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 756 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 757 }
<> 149:156823d33999 758 }
<> 149:156823d33999 759
<> 149:156823d33999 760 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
<> 149:156823d33999 761 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 762 volatile uint32_t tmpval = huart->Instance->RDR; // Clear PE flag
<> 149:156823d33999 763 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 764 volatile uint32_t tmpval = huart->Instance->RDR; // Clear FE flag
<> 149:156823d33999 765 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
<> 149:156823d33999 766 volatile uint32_t tmpval = huart->Instance->RDR; // Clear NE flag
<> 149:156823d33999 767 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 768 volatile uint32_t tmpval = huart->Instance->RDR; // Clear ORE flag
<> 149:156823d33999 769 }
<> 149:156823d33999 770 }
<> 149:156823d33999 771
<> 149:156823d33999 772 /**
<> 149:156823d33999 773 * The asynchronous TX and RX handler.
<> 149:156823d33999 774 *
<> 149:156823d33999 775 * @param obj The serial object
<> 149:156823d33999 776 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
<> 149:156823d33999 777 */
<> 149:156823d33999 778 int serial_irq_handler_asynch(serial_t *obj)
<> 149:156823d33999 779 {
<> 149:156823d33999 780 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 781 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 782
<> 149:156823d33999 783 volatile int return_event = 0;
<> 149:156823d33999 784 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
<> 149:156823d33999 785 uint8_t i = 0;
<> 149:156823d33999 786
<> 149:156823d33999 787 // TX PART:
<> 149:156823d33999 788 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
<> 149:156823d33999 789 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
<> 149:156823d33999 790 // Return event SERIAL_EVENT_TX_COMPLETE if requested
<> 149:156823d33999 791 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
<> 149:156823d33999 792 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
<> 149:156823d33999 793 }
<> 149:156823d33999 794 }
<> 149:156823d33999 795 }
<> 149:156823d33999 796
<> 149:156823d33999 797 // Handle error events
<> 149:156823d33999 798 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
<> 149:156823d33999 799 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 800 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
<> 149:156823d33999 801 }
<> 149:156823d33999 802 }
<> 149:156823d33999 803
<> 149:156823d33999 804 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
<> 149:156823d33999 805 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 806 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
<> 149:156823d33999 807 }
<> 149:156823d33999 808 }
<> 149:156823d33999 809
<> 149:156823d33999 810 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
<> 149:156823d33999 811 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
<> 149:156823d33999 812 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
<> 149:156823d33999 813 }
<> 149:156823d33999 814 }
<> 149:156823d33999 815
<> 149:156823d33999 816 HAL_UART_IRQHandler(huart);
<> 149:156823d33999 817
<> 149:156823d33999 818 // Abort if an error occurs
<> 149:156823d33999 819 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
<> 149:156823d33999 820 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
<> 149:156823d33999 821 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
<> 149:156823d33999 822 return return_event;
<> 149:156823d33999 823 }
<> 149:156823d33999 824
<> 149:156823d33999 825 //RX PART
<> 149:156823d33999 826 if (huart->RxXferSize != 0) {
<> 149:156823d33999 827 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
<> 149:156823d33999 828 }
<> 149:156823d33999 829 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
<> 149:156823d33999 830 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
<> 149:156823d33999 831 }
<> 149:156823d33999 832
<> 149:156823d33999 833 // Check if char_match is present
<> 149:156823d33999 834 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
<> 149:156823d33999 835 if (buf != NULL) {
<> 149:156823d33999 836 for (i = 0; i < obj->rx_buff.pos; i++) {
<> 149:156823d33999 837 if (buf[i] == obj->char_match) {
<> 149:156823d33999 838 obj->rx_buff.pos = i;
<> 149:156823d33999 839 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
<> 149:156823d33999 840 serial_rx_abort_asynch(obj);
<> 149:156823d33999 841 break;
<> 149:156823d33999 842 }
<> 149:156823d33999 843 }
<> 149:156823d33999 844 }
<> 149:156823d33999 845 }
<> 149:156823d33999 846
<> 149:156823d33999 847 return return_event;
<> 149:156823d33999 848 }
<> 149:156823d33999 849
<> 149:156823d33999 850 /**
<> 149:156823d33999 851 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
<> 149:156823d33999 852 * flush TX hardware buffer if TX FIFO is used
<> 149:156823d33999 853 *
<> 149:156823d33999 854 * @param obj The serial object
<> 149:156823d33999 855 */
<> 149:156823d33999 856 void serial_tx_abort_asynch(serial_t *obj)
<> 149:156823d33999 857 {
<> 149:156823d33999 858 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 859 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 860
<> 149:156823d33999 861 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
<> 149:156823d33999 862 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
<> 149:156823d33999 863
<> 149:156823d33999 864 // clear flags
<> 149:156823d33999 865 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
<> 149:156823d33999 866
<> 149:156823d33999 867 // reset states
<> 149:156823d33999 868 huart->TxXferCount = 0;
<> 149:156823d33999 869 // update handle state
<> 149:156823d33999 870 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 871 huart->gState = HAL_UART_STATE_BUSY_RX;
<> 149:156823d33999 872 } else {
<> 149:156823d33999 873 huart->gState = HAL_UART_STATE_READY;
<> 149:156823d33999 874 }
<> 149:156823d33999 875 }
<> 149:156823d33999 876
<> 149:156823d33999 877 /**
<> 149:156823d33999 878 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
<> 149:156823d33999 879 * flush RX hardware buffer if RX FIFO is used
<> 149:156823d33999 880 *
<> 149:156823d33999 881 * @param obj The serial object
<> 149:156823d33999 882 */
<> 149:156823d33999 883 void serial_rx_abort_asynch(serial_t *obj)
<> 149:156823d33999 884 {
<> 149:156823d33999 885 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 886 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
<> 149:156823d33999 887
<> 149:156823d33999 888 // disable interrupts
<> 149:156823d33999 889 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
<> 149:156823d33999 890 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
<> 149:156823d33999 891 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
<> 149:156823d33999 892
<> 149:156823d33999 893 // clear flags
<> 149:156823d33999 894 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
<> 149:156823d33999 895 volatile uint32_t tmpval = huart->Instance->RDR; // Clear errors flag
<> 149:156823d33999 896
<> 149:156823d33999 897 // reset states
<> 149:156823d33999 898 huart->RxXferCount = 0;
<> 149:156823d33999 899 // update handle state
<> 149:156823d33999 900 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
<> 149:156823d33999 901 huart->RxState = HAL_UART_STATE_BUSY_TX;
<> 149:156823d33999 902 } else {
<> 149:156823d33999 903 huart->RxState = HAL_UART_STATE_READY;
<> 149:156823d33999 904 }
<> 149:156823d33999 905 }
<> 149:156823d33999 906
<> 149:156823d33999 907 #endif
<> 149:156823d33999 908
<> 149:156823d33999 909 #if DEVICE_SERIAL_FC
<> 149:156823d33999 910
<> 149:156823d33999 911 /**
<> 149:156823d33999 912 * Set HW Control Flow
<> 149:156823d33999 913 * @param obj The serial object
<> 149:156823d33999 914 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
<> 149:156823d33999 915 * @param rxflow Pin for the rxflow
<> 149:156823d33999 916 * @param txflow Pin for the txflow
<> 149:156823d33999 917 */
<> 149:156823d33999 918 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
<> 149:156823d33999 919 {
<> 149:156823d33999 920 struct serial_s *obj_s = SERIAL_S(obj);
<> 149:156823d33999 921
<> 149:156823d33999 922 // Determine the UART to use (UART_1, UART_2, ...)
<> 149:156823d33999 923 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 924 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
<> 149:156823d33999 925
<> 149:156823d33999 926 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
<> 149:156823d33999 927 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
<> 149:156823d33999 928 MBED_ASSERT(obj_s->uart != (UARTName)NC);
<> 149:156823d33999 929
<> 149:156823d33999 930 if(type == FlowControlNone) {
<> 149:156823d33999 931 // Disable hardware flow control
<> 149:156823d33999 932 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
<> 149:156823d33999 933 }
<> 149:156823d33999 934 if (type == FlowControlRTS) {
<> 149:156823d33999 935 // Enable RTS
<> 149:156823d33999 936 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 937 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
<> 149:156823d33999 938 obj_s->pin_rts = rxflow;
<> 149:156823d33999 939 // Enable the pin for RTS function
<> 149:156823d33999 940 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 941 }
<> 149:156823d33999 942 if (type == FlowControlCTS) {
<> 149:156823d33999 943 // Enable CTS
<> 149:156823d33999 944 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 945 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
<> 149:156823d33999 946 obj_s->pin_cts = txflow;
<> 149:156823d33999 947 // Enable the pin for CTS function
<> 149:156823d33999 948 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 949 }
<> 149:156823d33999 950 if (type == FlowControlRTSCTS) {
<> 149:156823d33999 951 // Enable CTS & RTS
<> 149:156823d33999 952 MBED_ASSERT(uart_rts != (UARTName)NC);
<> 149:156823d33999 953 MBED_ASSERT(uart_cts != (UARTName)NC);
<> 149:156823d33999 954 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
<> 149:156823d33999 955 obj_s->pin_rts = rxflow;
<> 149:156823d33999 956 obj_s->pin_cts = txflow;
<> 149:156823d33999 957 // Enable the pin for CTS function
<> 149:156823d33999 958 pinmap_pinout(txflow, PinMap_UART_CTS);
<> 149:156823d33999 959 // Enable the pin for RTS function
<> 149:156823d33999 960 pinmap_pinout(rxflow, PinMap_UART_RTS);
<> 149:156823d33999 961 }
<> 149:156823d33999 962
<> 149:156823d33999 963 init_uart(obj);
<> 149:156823d33999 964 }
<> 149:156823d33999 965
<> 149:156823d33999 966 #endif
<> 149:156823d33999 967
<> 149:156823d33999 968 #endif