mbed-os

Fork of mbed-os by erkin yucel

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 *******************************************************************************
elessair 0:f269e3021894 3 * Copyright (c) 2014, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #include "mbed_assert.h"
elessair 0:f269e3021894 31 #include "serial_api.h"
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #if DEVICE_SERIAL
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 #include "cmsis.h"
elessair 0:f269e3021894 36 #include "pinmap.h"
elessair 0:f269e3021894 37 #include "mbed_error.h"
elessair 0:f269e3021894 38 #include <string.h>
elessair 0:f269e3021894 39 #include "PeripheralPins.h"
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 #define UART_NUM (5)
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 static uint32_t serial_irq_ids[UART_NUM] = {0};
elessair 0:f269e3021894 44 static UART_HandleTypeDef uart_handlers[UART_NUM];
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 static uart_irq_handler irq_handler;
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 int stdio_uart_inited = 0;
elessair 0:f269e3021894 49 serial_t stdio_uart;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 52 #define SERIAL_S(obj) (&((obj)->serial))
elessair 0:f269e3021894 53 #else
elessair 0:f269e3021894 54 #define SERIAL_S(obj) (obj)
elessair 0:f269e3021894 55 #endif
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 static void init_uart(serial_t *obj)
elessair 0:f269e3021894 58 {
elessair 0:f269e3021894 59 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 60 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 61 huart->Instance = (USART_TypeDef *)(obj_s->uart);
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 huart->Init.BaudRate = obj_s->baudrate;
elessair 0:f269e3021894 64 huart->Init.WordLength = obj_s->databits;
elessair 0:f269e3021894 65 huart->Init.StopBits = obj_s->stopbits;
elessair 0:f269e3021894 66 huart->Init.Parity = obj_s->parity;
elessair 0:f269e3021894 67 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 68 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
elessair 0:f269e3021894 69 #else
elessair 0:f269e3021894 70 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 71 #endif
elessair 0:f269e3021894 72 huart->TxXferCount = 0;
elessair 0:f269e3021894 73 huart->TxXferSize = 0;
elessair 0:f269e3021894 74 huart->RxXferCount = 0;
elessair 0:f269e3021894 75 huart->RxXferSize = 0;
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 if (obj_s->pin_rx == NC) {
elessair 0:f269e3021894 78 huart->Init.Mode = UART_MODE_TX;
elessair 0:f269e3021894 79 } else if (obj_s->pin_tx == NC) {
elessair 0:f269e3021894 80 huart->Init.Mode = UART_MODE_RX;
elessair 0:f269e3021894 81 } else {
elessair 0:f269e3021894 82 huart->Init.Mode = UART_MODE_TX_RX;
elessair 0:f269e3021894 83 }
elessair 0:f269e3021894 84
elessair 0:f269e3021894 85 if (HAL_UART_Init(huart) != HAL_OK) {
elessair 0:f269e3021894 86 error("Cannot initialize UART\n");
elessair 0:f269e3021894 87 }
elessair 0:f269e3021894 88 }
elessair 0:f269e3021894 89
elessair 0:f269e3021894 90 void serial_init(serial_t *obj, PinName tx, PinName rx)
elessair 0:f269e3021894 91 {
elessair 0:f269e3021894 92 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 95 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
elessair 0:f269e3021894 96 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
elessair 0:f269e3021894 97
elessair 0:f269e3021894 98 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 99 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
elessair 0:f269e3021894 100 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 101
elessair 0:f269e3021894 102 // Enable USART clock
elessair 0:f269e3021894 103 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 104 __HAL_RCC_USART1_FORCE_RESET();
elessair 0:f269e3021894 105 __HAL_RCC_USART1_RELEASE_RESET();
elessair 0:f269e3021894 106 __HAL_RCC_USART1_CLK_ENABLE();
elessair 0:f269e3021894 107 obj_s->index = 0;
elessair 0:f269e3021894 108 }
elessair 0:f269e3021894 109 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 110 __HAL_RCC_USART2_FORCE_RESET();
elessair 0:f269e3021894 111 __HAL_RCC_USART2_RELEASE_RESET();
elessair 0:f269e3021894 112 __HAL_RCC_USART2_CLK_ENABLE();
elessair 0:f269e3021894 113 obj_s->index = 1;
elessair 0:f269e3021894 114 }
elessair 0:f269e3021894 115 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 116 __HAL_RCC_USART3_FORCE_RESET();
elessair 0:f269e3021894 117 __HAL_RCC_USART3_RELEASE_RESET();
elessair 0:f269e3021894 118 __HAL_RCC_USART3_CLK_ENABLE();
elessair 0:f269e3021894 119 obj_s->index = 2;
elessair 0:f269e3021894 120 }
elessair 0:f269e3021894 121 #if defined(UART4_BASE)
elessair 0:f269e3021894 122 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 123 __HAL_RCC_UART4_FORCE_RESET();
elessair 0:f269e3021894 124 __HAL_RCC_UART4_RELEASE_RESET();
elessair 0:f269e3021894 125 __HAL_RCC_UART4_CLK_ENABLE();
elessair 0:f269e3021894 126 obj_s->index = 3;
elessair 0:f269e3021894 127 }
elessair 0:f269e3021894 128 #endif
elessair 0:f269e3021894 129 #if defined(UART5_BASE)
elessair 0:f269e3021894 130 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 131 __HAL_RCC_UART5_FORCE_RESET();
elessair 0:f269e3021894 132 __HAL_RCC_UART5_RELEASE_RESET();
elessair 0:f269e3021894 133 __HAL_RCC_UART5_CLK_ENABLE();
elessair 0:f269e3021894 134 obj_s->index = 4;
elessair 0:f269e3021894 135 }
elessair 0:f269e3021894 136 #endif
elessair 0:f269e3021894 137
elessair 0:f269e3021894 138 // Configure UART pins
elessair 0:f269e3021894 139 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 140 pinmap_pinout(rx, PinMap_UART_RX);
elessair 0:f269e3021894 141
elessair 0:f269e3021894 142 if (tx != NC) {
elessair 0:f269e3021894 143 pin_mode(tx, PullUp);
elessair 0:f269e3021894 144 }
elessair 0:f269e3021894 145 if (rx != NC) {
elessair 0:f269e3021894 146 pin_mode(rx, PullUp);
elessair 0:f269e3021894 147 }
elessair 0:f269e3021894 148
elessair 0:f269e3021894 149 // Configure UART
elessair 0:f269e3021894 150 obj_s->baudrate = 9600;
elessair 0:f269e3021894 151 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 152 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 153 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 154
elessair 0:f269e3021894 155 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 156 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 157 #endif
elessair 0:f269e3021894 158
elessair 0:f269e3021894 159 obj_s->pin_tx = tx;
elessair 0:f269e3021894 160 obj_s->pin_rx = rx;
elessair 0:f269e3021894 161
elessair 0:f269e3021894 162 init_uart(obj);
elessair 0:f269e3021894 163
elessair 0:f269e3021894 164 // For stdio management
elessair 0:f269e3021894 165 if (obj_s->uart == STDIO_UART) {
elessair 0:f269e3021894 166 stdio_uart_inited = 1;
elessair 0:f269e3021894 167 memcpy(&stdio_uart, obj, sizeof(serial_t));
elessair 0:f269e3021894 168 }
elessair 0:f269e3021894 169 }
elessair 0:f269e3021894 170
elessair 0:f269e3021894 171 void serial_free(serial_t *obj)
elessair 0:f269e3021894 172 {
elessair 0:f269e3021894 173 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 174
elessair 0:f269e3021894 175 // Reset UART and disable clock
elessair 0:f269e3021894 176 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 177 __USART1_FORCE_RESET();
elessair 0:f269e3021894 178 __USART1_RELEASE_RESET();
elessair 0:f269e3021894 179 __USART1_CLK_DISABLE();
elessair 0:f269e3021894 180 }
elessair 0:f269e3021894 181 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 182 __USART2_FORCE_RESET();
elessair 0:f269e3021894 183 __USART2_RELEASE_RESET();
elessair 0:f269e3021894 184 __USART2_CLK_DISABLE();
elessair 0:f269e3021894 185 }
elessair 0:f269e3021894 186 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 187 __USART3_FORCE_RESET();
elessair 0:f269e3021894 188 __USART3_RELEASE_RESET();
elessair 0:f269e3021894 189 __USART3_CLK_DISABLE();
elessair 0:f269e3021894 190 }
elessair 0:f269e3021894 191
elessair 0:f269e3021894 192 #if defined(UART4_BASE)
elessair 0:f269e3021894 193 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 194 __UART4_FORCE_RESET();
elessair 0:f269e3021894 195 __UART4_RELEASE_RESET();
elessair 0:f269e3021894 196 __UART4_CLK_DISABLE();
elessair 0:f269e3021894 197 }
elessair 0:f269e3021894 198 #endif
elessair 0:f269e3021894 199 #if defined(UART5_BASE)
elessair 0:f269e3021894 200 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 201 __UART5_FORCE_RESET();
elessair 0:f269e3021894 202 __UART5_RELEASE_RESET();
elessair 0:f269e3021894 203 __UART5_CLK_DISABLE();
elessair 0:f269e3021894 204 }
elessair 0:f269e3021894 205 #endif
elessair 0:f269e3021894 206
elessair 0:f269e3021894 207 // Configure GPIOs
elessair 0:f269e3021894 208 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 209 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 210
elessair 0:f269e3021894 211 serial_irq_ids[obj_s->index] = 0;
elessair 0:f269e3021894 212 }
elessair 0:f269e3021894 213
elessair 0:f269e3021894 214 void serial_baud(serial_t *obj, int baudrate)
elessair 0:f269e3021894 215 {
elessair 0:f269e3021894 216 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 217
elessair 0:f269e3021894 218 obj_s->baudrate = baudrate;
elessair 0:f269e3021894 219 init_uart(obj);
elessair 0:f269e3021894 220 }
elessair 0:f269e3021894 221
elessair 0:f269e3021894 222 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
elessair 0:f269e3021894 223 {
elessair 0:f269e3021894 224 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 225
elessair 0:f269e3021894 226 if (data_bits == 9) {
elessair 0:f269e3021894 227 obj_s->databits = UART_WORDLENGTH_9B;
elessair 0:f269e3021894 228 } else {
elessair 0:f269e3021894 229 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 230 }
elessair 0:f269e3021894 231
elessair 0:f269e3021894 232 switch (parity) {
elessair 0:f269e3021894 233 case ParityOdd:
elessair 0:f269e3021894 234 obj_s->parity = UART_PARITY_ODD;
elessair 0:f269e3021894 235 break;
elessair 0:f269e3021894 236 case ParityEven:
elessair 0:f269e3021894 237 obj_s->parity = UART_PARITY_EVEN;
elessair 0:f269e3021894 238 break;
elessair 0:f269e3021894 239 default: // ParityNone
elessair 0:f269e3021894 240 case ParityForced0: // unsupported!
elessair 0:f269e3021894 241 case ParityForced1: // unsupported!
elessair 0:f269e3021894 242 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 243 break;
elessair 0:f269e3021894 244 }
elessair 0:f269e3021894 245
elessair 0:f269e3021894 246 if (stop_bits == 2) {
elessair 0:f269e3021894 247 obj_s->stopbits = UART_STOPBITS_2;
elessair 0:f269e3021894 248 } else {
elessair 0:f269e3021894 249 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 250 }
elessair 0:f269e3021894 251
elessair 0:f269e3021894 252 init_uart(obj);
elessair 0:f269e3021894 253 }
elessair 0:f269e3021894 254
elessair 0:f269e3021894 255 /******************************************************************************
elessair 0:f269e3021894 256 * INTERRUPTS HANDLING
elessair 0:f269e3021894 257 ******************************************************************************/
elessair 0:f269e3021894 258
elessair 0:f269e3021894 259 static void uart_irq(int id)
elessair 0:f269e3021894 260 {
elessair 0:f269e3021894 261 UART_HandleTypeDef * huart = &uart_handlers[id];
elessair 0:f269e3021894 262
elessair 0:f269e3021894 263 if (serial_irq_ids[id] != 0) {
elessair 0:f269e3021894 264 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 265 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 266 irq_handler(serial_irq_ids[id], TxIrq);
elessair 0:f269e3021894 267 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 268 }
elessair 0:f269e3021894 269 }
elessair 0:f269e3021894 270 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
elessair 0:f269e3021894 271 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
elessair 0:f269e3021894 272 irq_handler(serial_irq_ids[id], RxIrq);
elessair 0:f269e3021894 273 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
elessair 0:f269e3021894 274 }
elessair 0:f269e3021894 275 }
elessair 0:f269e3021894 276 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 277 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
elessair 0:f269e3021894 278 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
elessair 0:f269e3021894 279 }
elessair 0:f269e3021894 280 }
elessair 0:f269e3021894 281 }
elessair 0:f269e3021894 282 }
elessair 0:f269e3021894 283
elessair 0:f269e3021894 284 static void uart1_irq(void)
elessair 0:f269e3021894 285 {
elessair 0:f269e3021894 286 uart_irq(0);
elessair 0:f269e3021894 287 }
elessair 0:f269e3021894 288
elessair 0:f269e3021894 289 static void uart2_irq(void)
elessair 0:f269e3021894 290 {
elessair 0:f269e3021894 291 uart_irq(1);
elessair 0:f269e3021894 292 }
elessair 0:f269e3021894 293
elessair 0:f269e3021894 294 static void uart3_irq(void)
elessair 0:f269e3021894 295 {
elessair 0:f269e3021894 296 uart_irq(2);
elessair 0:f269e3021894 297 }
elessair 0:f269e3021894 298
elessair 0:f269e3021894 299 #if defined(UART4_BASE)
elessair 0:f269e3021894 300 static void uart4_irq(void)
elessair 0:f269e3021894 301 {
elessair 0:f269e3021894 302 uart_irq(3);
elessair 0:f269e3021894 303 }
elessair 0:f269e3021894 304 #endif
elessair 0:f269e3021894 305 #if defined(UART5_BASE)
elessair 0:f269e3021894 306 static void uart5_irq(void)
elessair 0:f269e3021894 307 {
elessair 0:f269e3021894 308 uart_irq(4);
elessair 0:f269e3021894 309 }
elessair 0:f269e3021894 310 #endif
elessair 0:f269e3021894 311
elessair 0:f269e3021894 312 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
elessair 0:f269e3021894 313 {
elessair 0:f269e3021894 314 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 315
elessair 0:f269e3021894 316 irq_handler = handler;
elessair 0:f269e3021894 317 serial_irq_ids[obj_s->index] = id;
elessair 0:f269e3021894 318 }
elessair 0:f269e3021894 319
elessair 0:f269e3021894 320 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
elessair 0:f269e3021894 321 {
elessair 0:f269e3021894 322 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 323 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 324 IRQn_Type irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 325 uint32_t vector = 0;
elessair 0:f269e3021894 326
elessair 0:f269e3021894 327 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 328 irq_n = USART1_IRQn;
elessair 0:f269e3021894 329 vector = (uint32_t)&uart1_irq;
elessair 0:f269e3021894 330 }
elessair 0:f269e3021894 331
elessair 0:f269e3021894 332 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 333 irq_n = USART2_IRQn;
elessair 0:f269e3021894 334 vector = (uint32_t)&uart2_irq;
elessair 0:f269e3021894 335 }
elessair 0:f269e3021894 336
elessair 0:f269e3021894 337 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 338 irq_n = USART3_IRQn;
elessair 0:f269e3021894 339 vector = (uint32_t)&uart3_irq;
elessair 0:f269e3021894 340 }
elessair 0:f269e3021894 341 #if defined(UART4_BASE)
elessair 0:f269e3021894 342 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 343 irq_n = UART4_IRQn;
elessair 0:f269e3021894 344 vector = (uint32_t)&uart4_irq;
elessair 0:f269e3021894 345 }
elessair 0:f269e3021894 346 #endif
elessair 0:f269e3021894 347 #if defined(UART5_BASE)
elessair 0:f269e3021894 348 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 349 irq_n = UART5_IRQn;
elessair 0:f269e3021894 350 vector = (uint32_t)&uart5_irq;
elessair 0:f269e3021894 351 }
elessair 0:f269e3021894 352 #endif
elessair 0:f269e3021894 353
elessair 0:f269e3021894 354 if (enable) {
elessair 0:f269e3021894 355 if (irq == RxIrq) {
elessair 0:f269e3021894 356 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 357 } else { // TxIrq
elessair 0:f269e3021894 358 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 359 }
elessair 0:f269e3021894 360 NVIC_SetVector(irq_n, vector);
elessair 0:f269e3021894 361 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 362
elessair 0:f269e3021894 363 } else { // disable
elessair 0:f269e3021894 364 int all_disabled = 0;
elessair 0:f269e3021894 365 if (irq == RxIrq) {
elessair 0:f269e3021894 366 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 367 // Check if TxIrq is disabled too
elessair 0:f269e3021894 368 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
elessair 0:f269e3021894 369 all_disabled = 1;
elessair 0:f269e3021894 370 }
elessair 0:f269e3021894 371 } else { // TxIrq
elessair 0:f269e3021894 372 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 373 // Check if RxIrq is disabled too
elessair 0:f269e3021894 374 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
elessair 0:f269e3021894 375 all_disabled = 1;
elessair 0:f269e3021894 376 }
elessair 0:f269e3021894 377 }
elessair 0:f269e3021894 378
elessair 0:f269e3021894 379 if (all_disabled) {
elessair 0:f269e3021894 380 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 381 }
elessair 0:f269e3021894 382 }
elessair 0:f269e3021894 383 }
elessair 0:f269e3021894 384
elessair 0:f269e3021894 385 /******************************************************************************
elessair 0:f269e3021894 386 * READ/WRITE
elessair 0:f269e3021894 387 ******************************************************************************/
elessair 0:f269e3021894 388
elessair 0:f269e3021894 389 int serial_getc(serial_t *obj)
elessair 0:f269e3021894 390 {
elessair 0:f269e3021894 391 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 392 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 393
elessair 0:f269e3021894 394 while (!serial_readable(obj));
elessair 0:f269e3021894 395 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 396 return (int)(huart->Instance->DR & (uint8_t)0xFF);
elessair 0:f269e3021894 397 } else {
elessair 0:f269e3021894 398 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
elessair 0:f269e3021894 399 }
elessair 0:f269e3021894 400 }
elessair 0:f269e3021894 401
elessair 0:f269e3021894 402 void serial_putc(serial_t *obj, int c)
elessair 0:f269e3021894 403 {
elessair 0:f269e3021894 404 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 405 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 406
elessair 0:f269e3021894 407 while (!serial_writable(obj));
elessair 0:f269e3021894 408 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 409 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
elessair 0:f269e3021894 410 } else {
elessair 0:f269e3021894 411 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
elessair 0:f269e3021894 412 }
elessair 0:f269e3021894 413 }
elessair 0:f269e3021894 414
elessair 0:f269e3021894 415 int serial_readable(serial_t *obj)
elessair 0:f269e3021894 416 {
elessair 0:f269e3021894 417 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 418 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 419
elessair 0:f269e3021894 420 // Check if data is received
elessair 0:f269e3021894 421 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 422 }
elessair 0:f269e3021894 423
elessair 0:f269e3021894 424 int serial_writable(serial_t *obj)
elessair 0:f269e3021894 425 {
elessair 0:f269e3021894 426 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 427 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 428
elessair 0:f269e3021894 429 // Check if data is transmitted
elessair 0:f269e3021894 430 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 431 }
elessair 0:f269e3021894 432
elessair 0:f269e3021894 433 void serial_clear(serial_t *obj)
elessair 0:f269e3021894 434 {
elessair 0:f269e3021894 435 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 436 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 437
elessair 0:f269e3021894 438 huart->TxXferCount = 0;
elessair 0:f269e3021894 439 huart->RxXferCount = 0;
elessair 0:f269e3021894 440 }
elessair 0:f269e3021894 441
elessair 0:f269e3021894 442 void serial_pinout_tx(PinName tx)
elessair 0:f269e3021894 443 {
elessair 0:f269e3021894 444 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 445 }
elessair 0:f269e3021894 446
elessair 0:f269e3021894 447 void serial_break_set(serial_t *obj)
elessair 0:f269e3021894 448 {
elessair 0:f269e3021894 449 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 450 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 451
elessair 0:f269e3021894 452 HAL_LIN_SendBreak(huart);
elessair 0:f269e3021894 453 }
elessair 0:f269e3021894 454
elessair 0:f269e3021894 455 void serial_break_clear(serial_t *obj)
elessair 0:f269e3021894 456 {
elessair 0:f269e3021894 457 (void)obj;
elessair 0:f269e3021894 458 }
elessair 0:f269e3021894 459
elessair 0:f269e3021894 460 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 461
elessair 0:f269e3021894 462 /******************************************************************************
elessair 0:f269e3021894 463 * LOCAL HELPER FUNCTIONS
elessair 0:f269e3021894 464 ******************************************************************************/
elessair 0:f269e3021894 465
elessair 0:f269e3021894 466 /**
elessair 0:f269e3021894 467 * Configure the TX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 468 *
elessair 0:f269e3021894 469 * @param obj The serial object.
elessair 0:f269e3021894 470 * @param tx The buffer for sending.
elessair 0:f269e3021894 471 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 472 */
elessair 0:f269e3021894 473 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
elessair 0:f269e3021894 474 {
elessair 0:f269e3021894 475 (void)width;
elessair 0:f269e3021894 476
elessair 0:f269e3021894 477 // Exit if a transmit is already on-going
elessair 0:f269e3021894 478 if (serial_tx_active(obj)) {
elessair 0:f269e3021894 479 return;
elessair 0:f269e3021894 480 }
elessair 0:f269e3021894 481
elessair 0:f269e3021894 482 obj->tx_buff.buffer = tx;
elessair 0:f269e3021894 483 obj->tx_buff.length = tx_length;
elessair 0:f269e3021894 484 obj->tx_buff.pos = 0;
elessair 0:f269e3021894 485 }
elessair 0:f269e3021894 486
elessair 0:f269e3021894 487 /**
elessair 0:f269e3021894 488 * Configure the RX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 489 *
elessair 0:f269e3021894 490 * @param obj The serial object.
elessair 0:f269e3021894 491 * @param tx The buffer for sending.
elessair 0:f269e3021894 492 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 493 */
elessair 0:f269e3021894 494 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
elessair 0:f269e3021894 495 {
elessair 0:f269e3021894 496 (void)width;
elessair 0:f269e3021894 497
elessair 0:f269e3021894 498 // Exit if a reception is already on-going
elessair 0:f269e3021894 499 if (serial_rx_active(obj)) {
elessair 0:f269e3021894 500 return;
elessair 0:f269e3021894 501 }
elessair 0:f269e3021894 502
elessair 0:f269e3021894 503 obj->rx_buff.buffer = rx;
elessair 0:f269e3021894 504 obj->rx_buff.length = rx_length;
elessair 0:f269e3021894 505 obj->rx_buff.pos = 0;
elessair 0:f269e3021894 506 }
elessair 0:f269e3021894 507
elessair 0:f269e3021894 508 /**
elessair 0:f269e3021894 509 * Configure events
elessair 0:f269e3021894 510 *
elessair 0:f269e3021894 511 * @param obj The serial object
elessair 0:f269e3021894 512 * @param event The logical OR of the events to configure
elessair 0:f269e3021894 513 * @param enable Set to non-zero to enable events, or zero to disable them
elessair 0:f269e3021894 514 */
elessair 0:f269e3021894 515 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
elessair 0:f269e3021894 516 {
elessair 0:f269e3021894 517 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 518
elessair 0:f269e3021894 519 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
elessair 0:f269e3021894 520 if (enable) {
elessair 0:f269e3021894 521 obj_s->events |= event;
elessair 0:f269e3021894 522 } else {
elessair 0:f269e3021894 523 obj_s->events &= ~event;
elessair 0:f269e3021894 524 }
elessair 0:f269e3021894 525 }
elessair 0:f269e3021894 526
elessair 0:f269e3021894 527
elessair 0:f269e3021894 528 /**
elessair 0:f269e3021894 529 * Get index of serial object TX IRQ, relating it to the physical peripheral.
elessair 0:f269e3021894 530 *
elessair 0:f269e3021894 531 * @param obj pointer to serial object
elessair 0:f269e3021894 532 * @return internal NVIC TX IRQ index of U(S)ART peripheral
elessair 0:f269e3021894 533 */
elessair 0:f269e3021894 534 static IRQn_Type serial_get_irq_n(serial_t *obj)
elessair 0:f269e3021894 535 {
elessair 0:f269e3021894 536 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 537 IRQn_Type irq_n;
elessair 0:f269e3021894 538
elessair 0:f269e3021894 539 switch (obj_s->index) {
elessair 0:f269e3021894 540 case 0:
elessair 0:f269e3021894 541 irq_n = USART1_IRQn;
elessair 0:f269e3021894 542 break;
elessair 0:f269e3021894 543
elessair 0:f269e3021894 544 case 1:
elessair 0:f269e3021894 545 irq_n = USART2_IRQn;
elessair 0:f269e3021894 546 break;
elessair 0:f269e3021894 547
elessair 0:f269e3021894 548 case 2:
elessair 0:f269e3021894 549 irq_n = USART3_IRQn;
elessair 0:f269e3021894 550 break;
elessair 0:f269e3021894 551 #if defined(UART4_BASE)
elessair 0:f269e3021894 552 case 3:
elessair 0:f269e3021894 553 irq_n = UART4_IRQn;
elessair 0:f269e3021894 554 break;
elessair 0:f269e3021894 555 #endif
elessair 0:f269e3021894 556 #if defined(UART5_BASE)
elessair 0:f269e3021894 557 case 4:
elessair 0:f269e3021894 558 irq_n = UART5_IRQn;
elessair 0:f269e3021894 559 break;
elessair 0:f269e3021894 560 #endif
elessair 0:f269e3021894 561 default:
elessair 0:f269e3021894 562 irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 563 }
elessair 0:f269e3021894 564
elessair 0:f269e3021894 565 return irq_n;
elessair 0:f269e3021894 566 }
elessair 0:f269e3021894 567
elessair 0:f269e3021894 568 /******************************************************************************
elessair 0:f269e3021894 569 * MBED API FUNCTIONS
elessair 0:f269e3021894 570 ******************************************************************************/
elessair 0:f269e3021894 571
elessair 0:f269e3021894 572 /**
elessair 0:f269e3021894 573 * Begin asynchronous TX transfer. The used buffer is specified in the serial
elessair 0:f269e3021894 574 * object, tx_buff
elessair 0:f269e3021894 575 *
elessair 0:f269e3021894 576 * @param obj The serial object
elessair 0:f269e3021894 577 * @param tx The buffer for sending
elessair 0:f269e3021894 578 * @param tx_length The number of words to transmit
elessair 0:f269e3021894 579 * @param tx_width The bit width of buffer word
elessair 0:f269e3021894 580 * @param handler The serial handler
elessair 0:f269e3021894 581 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 582 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 583 * @return Returns number of data transfered, or 0 otherwise
elessair 0:f269e3021894 584 */
elessair 0:f269e3021894 585 int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint)
elessair 0:f269e3021894 586 {
elessair 0:f269e3021894 587 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 588 (void) hint;
elessair 0:f269e3021894 589
elessair 0:f269e3021894 590 // Check buffer is ok
elessair 0:f269e3021894 591 MBED_ASSERT(tx != (void*)0);
elessair 0:f269e3021894 592 MBED_ASSERT(tx_width == 8); // support only 8b width
elessair 0:f269e3021894 593
elessair 0:f269e3021894 594 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 595 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 596
elessair 0:f269e3021894 597 if (tx_length == 0) {
elessair 0:f269e3021894 598 return 0;
elessair 0:f269e3021894 599 }
elessair 0:f269e3021894 600
elessair 0:f269e3021894 601 // Set up buffer
elessair 0:f269e3021894 602 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
elessair 0:f269e3021894 603
elessair 0:f269e3021894 604 // Set up events
elessair 0:f269e3021894 605 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
elessair 0:f269e3021894 606 serial_enable_event(obj, event, 1); // Set only the wanted events
elessair 0:f269e3021894 607
elessair 0:f269e3021894 608 // Enable interrupt
elessair 0:f269e3021894 609 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 610 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 611 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 612 NVIC_SetPriority(irq_n, 1);
elessair 0:f269e3021894 613 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 614 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 615
elessair 0:f269e3021894 616 // the following function will enable UART_IT_TXE and error interrupts
elessair 0:f269e3021894 617 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
elessair 0:f269e3021894 618 return 0;
elessair 0:f269e3021894 619 }
elessair 0:f269e3021894 620
elessair 0:f269e3021894 621 return tx_length;
elessair 0:f269e3021894 622 }
elessair 0:f269e3021894 623
elessair 0:f269e3021894 624 /**
elessair 0:f269e3021894 625 * Begin asynchronous RX transfer (enable interrupt for data collecting)
elessair 0:f269e3021894 626 * The used buffer is specified in the serial object, rx_buff
elessair 0:f269e3021894 627 *
elessair 0:f269e3021894 628 * @param obj The serial object
elessair 0:f269e3021894 629 * @param rx The buffer for sending
elessair 0:f269e3021894 630 * @param rx_length The number of words to transmit
elessair 0:f269e3021894 631 * @param rx_width The bit width of buffer word
elessair 0:f269e3021894 632 * @param handler The serial handler
elessair 0:f269e3021894 633 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 634 * @param handler The serial handler
elessair 0:f269e3021894 635 * @param char_match A character in range 0-254 to be matched
elessair 0:f269e3021894 636 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 637 */
elessair 0:f269e3021894 638 void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint)
elessair 0:f269e3021894 639 {
elessair 0:f269e3021894 640 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 641 (void) hint;
elessair 0:f269e3021894 642
elessair 0:f269e3021894 643 /* Sanity check arguments */
elessair 0:f269e3021894 644 MBED_ASSERT(obj);
elessair 0:f269e3021894 645 MBED_ASSERT(rx != (void*)0);
elessair 0:f269e3021894 646 MBED_ASSERT(rx_width == 8); // support only 8b width
elessair 0:f269e3021894 647
elessair 0:f269e3021894 648 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 649 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 650
elessair 0:f269e3021894 651 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
elessair 0:f269e3021894 652 serial_enable_event(obj, event, 1);
elessair 0:f269e3021894 653
elessair 0:f269e3021894 654 // set CharMatch
elessair 0:f269e3021894 655 obj->char_match = char_match;
elessair 0:f269e3021894 656
elessair 0:f269e3021894 657 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
elessair 0:f269e3021894 658
elessair 0:f269e3021894 659 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 660 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 661 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 662 NVIC_SetPriority(irq_n, 0);
elessair 0:f269e3021894 663 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 664 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 665
elessair 0:f269e3021894 666 // following HAL function will enable the RXNE interrupt + error interrupts
elessair 0:f269e3021894 667 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
elessair 0:f269e3021894 668 }
elessair 0:f269e3021894 669
elessair 0:f269e3021894 670 /**
elessair 0:f269e3021894 671 * Attempts to determine if the serial peripheral is already in use for TX
elessair 0:f269e3021894 672 *
elessair 0:f269e3021894 673 * @param obj The serial object
elessair 0:f269e3021894 674 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 675 */
elessair 0:f269e3021894 676 uint8_t serial_tx_active(serial_t *obj)
elessair 0:f269e3021894 677 {
elessair 0:f269e3021894 678 MBED_ASSERT(obj);
elessair 0:f269e3021894 679
elessair 0:f269e3021894 680 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 681 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 682
elessair 0:f269e3021894 683 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
elessair 0:f269e3021894 684 }
elessair 0:f269e3021894 685
elessair 0:f269e3021894 686 /**
elessair 0:f269e3021894 687 * Attempts to determine if the serial peripheral is already in use for RX
elessair 0:f269e3021894 688 *
elessair 0:f269e3021894 689 * @param obj The serial object
elessair 0:f269e3021894 690 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 691 */
elessair 0:f269e3021894 692 uint8_t serial_rx_active(serial_t *obj)
elessair 0:f269e3021894 693 {
elessair 0:f269e3021894 694 MBED_ASSERT(obj);
elessair 0:f269e3021894 695
elessair 0:f269e3021894 696 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 697 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 698
elessair 0:f269e3021894 699 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
elessair 0:f269e3021894 700 }
elessair 0:f269e3021894 701
elessair 0:f269e3021894 702 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 703 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 704 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 705 }
elessair 0:f269e3021894 706 }
elessair 0:f269e3021894 707
elessair 0:f269e3021894 708 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 709 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 710 volatile uint32_t tmpval = huart->Instance->DR; // Clear PE flag
elessair 0:f269e3021894 711 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 712 volatile uint32_t tmpval = huart->Instance->DR; // Clear FE flag
elessair 0:f269e3021894 713 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
elessair 0:f269e3021894 714 volatile uint32_t tmpval = huart->Instance->DR; // Clear NE flag
elessair 0:f269e3021894 715 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 716 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
elessair 0:f269e3021894 717 }
elessair 0:f269e3021894 718 }
elessair 0:f269e3021894 719
elessair 0:f269e3021894 720 /**
elessair 0:f269e3021894 721 * The asynchronous TX and RX handler.
elessair 0:f269e3021894 722 *
elessair 0:f269e3021894 723 * @param obj The serial object
elessair 0:f269e3021894 724 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
elessair 0:f269e3021894 725 */
elessair 0:f269e3021894 726 int serial_irq_handler_asynch(serial_t *obj)
elessair 0:f269e3021894 727 {
elessair 0:f269e3021894 728 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 729 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 730
elessair 0:f269e3021894 731 volatile int return_event = 0;
elessair 0:f269e3021894 732 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
elessair 0:f269e3021894 733 uint8_t i = 0;
elessair 0:f269e3021894 734
elessair 0:f269e3021894 735 // TX PART:
elessair 0:f269e3021894 736 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 737 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 738 // Return event SERIAL_EVENT_TX_COMPLETE if requested
elessair 0:f269e3021894 739 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
elessair 0:f269e3021894 740 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 741 }
elessair 0:f269e3021894 742 }
elessair 0:f269e3021894 743 }
elessair 0:f269e3021894 744
elessair 0:f269e3021894 745 // Handle error events
elessair 0:f269e3021894 746 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 747 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 748 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
elessair 0:f269e3021894 749 }
elessair 0:f269e3021894 750 }
elessair 0:f269e3021894 751
elessair 0:f269e3021894 752 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 753 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 754 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
elessair 0:f269e3021894 755 }
elessair 0:f269e3021894 756 }
elessair 0:f269e3021894 757
elessair 0:f269e3021894 758 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 759 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 760 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
elessair 0:f269e3021894 761 }
elessair 0:f269e3021894 762 }
elessair 0:f269e3021894 763
elessair 0:f269e3021894 764 HAL_UART_IRQHandler(huart);
elessair 0:f269e3021894 765
elessair 0:f269e3021894 766 // Abort if an error occurs
elessair 0:f269e3021894 767 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
elessair 0:f269e3021894 768 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
elessair 0:f269e3021894 769 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
elessair 0:f269e3021894 770 return return_event;
elessair 0:f269e3021894 771 }
elessair 0:f269e3021894 772
elessair 0:f269e3021894 773 //RX PART
elessair 0:f269e3021894 774 if (huart->RxXferSize != 0) {
elessair 0:f269e3021894 775 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
elessair 0:f269e3021894 776 }
elessair 0:f269e3021894 777 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
elessair 0:f269e3021894 778 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 779 }
elessair 0:f269e3021894 780
elessair 0:f269e3021894 781 // Check if char_match is present
elessair 0:f269e3021894 782 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
elessair 0:f269e3021894 783 if (buf != NULL) {
elessair 0:f269e3021894 784 for (i = 0; i < obj->rx_buff.pos; i++) {
elessair 0:f269e3021894 785 if (buf[i] == obj->char_match) {
elessair 0:f269e3021894 786 obj->rx_buff.pos = i;
elessair 0:f269e3021894 787 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
elessair 0:f269e3021894 788 serial_rx_abort_asynch(obj);
elessair 0:f269e3021894 789 break;
elessair 0:f269e3021894 790 }
elessair 0:f269e3021894 791 }
elessair 0:f269e3021894 792 }
elessair 0:f269e3021894 793 }
elessair 0:f269e3021894 794
elessair 0:f269e3021894 795 return return_event;
elessair 0:f269e3021894 796 }
elessair 0:f269e3021894 797
elessair 0:f269e3021894 798 /**
elessair 0:f269e3021894 799 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elessair 0:f269e3021894 800 * flush TX hardware buffer if TX FIFO is used
elessair 0:f269e3021894 801 *
elessair 0:f269e3021894 802 * @param obj The serial object
elessair 0:f269e3021894 803 */
elessair 0:f269e3021894 804 void serial_tx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 805 {
elessair 0:f269e3021894 806 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 807 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 808
elessair 0:f269e3021894 809 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 810 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
elessair 0:f269e3021894 811
elessair 0:f269e3021894 812 // clear flags
elessair 0:f269e3021894 813 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 814
elessair 0:f269e3021894 815 // reset states
elessair 0:f269e3021894 816 huart->TxXferCount = 0;
elessair 0:f269e3021894 817 // update handle state
elessair 0:f269e3021894 818 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 819 huart->State = HAL_UART_STATE_BUSY_RX;
elessair 0:f269e3021894 820 } else {
elessair 0:f269e3021894 821 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 822 }
elessair 0:f269e3021894 823 }
elessair 0:f269e3021894 824
elessair 0:f269e3021894 825 /**
elessair 0:f269e3021894 826 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
elessair 0:f269e3021894 827 * flush RX hardware buffer if RX FIFO is used
elessair 0:f269e3021894 828 *
elessair 0:f269e3021894 829 * @param obj The serial object
elessair 0:f269e3021894 830 */
elessair 0:f269e3021894 831 void serial_rx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 832 {
elessair 0:f269e3021894 833 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 834 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 835
elessair 0:f269e3021894 836 // disable interrupts
elessair 0:f269e3021894 837 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 838 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
elessair 0:f269e3021894 839 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
elessair 0:f269e3021894 840
elessair 0:f269e3021894 841 // clear flags
elessair 0:f269e3021894 842 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
elessair 0:f269e3021894 843 volatile uint32_t tmpval = huart->Instance->DR; // Clear errors flag
elessair 0:f269e3021894 844
elessair 0:f269e3021894 845 // reset states
elessair 0:f269e3021894 846 huart->RxXferCount = 0;
elessair 0:f269e3021894 847 // update handle state
elessair 0:f269e3021894 848 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 849 huart->State = HAL_UART_STATE_BUSY_TX;
elessair 0:f269e3021894 850 } else {
elessair 0:f269e3021894 851 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 852 }
elessair 0:f269e3021894 853 }
elessair 0:f269e3021894 854
elessair 0:f269e3021894 855 #endif
elessair 0:f269e3021894 856
elessair 0:f269e3021894 857 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 858
elessair 0:f269e3021894 859 /**
elessair 0:f269e3021894 860 * Set HW Control Flow
elessair 0:f269e3021894 861 * @param obj The serial object
elessair 0:f269e3021894 862 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
elessair 0:f269e3021894 863 * @param rxflow Pin for the rxflow
elessair 0:f269e3021894 864 * @param txflow Pin for the txflow
elessair 0:f269e3021894 865 */
elessair 0:f269e3021894 866 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
elessair 0:f269e3021894 867 {
elessair 0:f269e3021894 868 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 869
elessair 0:f269e3021894 870 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 871 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 872 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 873
elessair 0:f269e3021894 874 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 875 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
elessair 0:f269e3021894 876 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 877
elessair 0:f269e3021894 878 if(type == FlowControlNone) {
elessair 0:f269e3021894 879 // Disable hardware flow control
elessair 0:f269e3021894 880 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 881 }
elessair 0:f269e3021894 882 if (type == FlowControlRTS) {
elessair 0:f269e3021894 883 // Enable RTS
elessair 0:f269e3021894 884 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 885 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
elessair 0:f269e3021894 886 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 887 // Enable the pin for RTS function
elessair 0:f269e3021894 888 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 889 }
elessair 0:f269e3021894 890 if (type == FlowControlCTS) {
elessair 0:f269e3021894 891 // Enable CTS
elessair 0:f269e3021894 892 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 893 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
elessair 0:f269e3021894 894 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 895 // Enable the pin for CTS function
elessair 0:f269e3021894 896 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 897 }
elessair 0:f269e3021894 898 if (type == FlowControlRTSCTS) {
elessair 0:f269e3021894 899 // Enable CTS & RTS
elessair 0:f269e3021894 900 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 901 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 902 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
elessair 0:f269e3021894 903 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 904 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 905 // Enable the pin for CTS function
elessair 0:f269e3021894 906 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 907 // Enable the pin for RTS function
elessair 0:f269e3021894 908 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 909 }
elessair 0:f269e3021894 910
elessair 0:f269e3021894 911 init_uart(obj);
elessair 0:f269e3021894 912 }
elessair 0:f269e3021894 913
elessair 0:f269e3021894 914 #endif
elessair 0:f269e3021894 915
elessair 0:f269e3021894 916 #endif