Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

targets/TARGET_STM/TARGET_STM32F0/serial_api.c@0:f269e3021894, 2016-10-23 (annotated)

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) 2015, 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 <string.h>
elessair 0:f269e3021894 38 #include "PeripheralPins.h"
elessair 0:f269e3021894 39 #include "mbed_error.h"
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 #if defined (TARGET_STM32F091RC)
elessair 0:f269e3021894 42 #define UART_NUM (8)
elessair 0:f269e3021894 43 #elif defined (TARGET_STM32F030R8) || defined (TARGET_STM32F051R8) || defined (TARGET_STM32F042K6)
elessair 0:f269e3021894 44 #define UART_NUM (2)
elessair 0:f269e3021894 45 #elif defined (TARGET_STM32F031K6)
elessair 0:f269e3021894 46 #define UART_NUM (1)
elessair 0:f269e3021894 47 #else
elessair 0:f269e3021894 48 #define UART_NUM (4)
elessair 0:f269e3021894 49 #endif
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 static uint32_t serial_irq_ids[UART_NUM] = {0};
elessair 0:f269e3021894 52 static UART_HandleTypeDef uart_handlers[UART_NUM];
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 static uart_irq_handler irq_handler;
elessair 0:f269e3021894 55
elessair 0:f269e3021894 56 int stdio_uart_inited = 0;
elessair 0:f269e3021894 57 serial_t stdio_uart;
elessair 0:f269e3021894 58
elessair 0:f269e3021894 59 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 60 #define SERIAL_S(obj) (&((obj)->serial))
elessair 0:f269e3021894 61 #else
elessair 0:f269e3021894 62 #define SERIAL_S(obj) (obj)
elessair 0:f269e3021894 63 #endif
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 static void init_uart(serial_t *obj)
elessair 0:f269e3021894 66 {
elessair 0:f269e3021894 67 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 68 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 69 huart->Instance = (USART_TypeDef *)(obj_s->uart);
elessair 0:f269e3021894 70
elessair 0:f269e3021894 71 huart->Init.BaudRate = obj_s->baudrate;
elessair 0:f269e3021894 72 huart->Init.WordLength = obj_s->databits;
elessair 0:f269e3021894 73 huart->Init.StopBits = obj_s->stopbits;
elessair 0:f269e3021894 74 huart->Init.Parity = obj_s->parity;
elessair 0:f269e3021894 75 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 76 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
elessair 0:f269e3021894 77 #else
elessair 0:f269e3021894 78 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 79 #endif
elessair 0:f269e3021894 80 huart->TxXferCount = 0;
elessair 0:f269e3021894 81 huart->TxXferSize = 0;
elessair 0:f269e3021894 82 huart->RxXferCount = 0;
elessair 0:f269e3021894 83 huart->RxXferSize = 0;
elessair 0:f269e3021894 84
elessair 0:f269e3021894 85 if (obj_s->pin_rx == NC) {
elessair 0:f269e3021894 86 huart->Init.Mode = UART_MODE_TX;
elessair 0:f269e3021894 87 } else if (obj_s->pin_tx == NC) {
elessair 0:f269e3021894 88 huart->Init.Mode = UART_MODE_RX;
elessair 0:f269e3021894 89 } else {
elessair 0:f269e3021894 90 huart->Init.Mode = UART_MODE_TX_RX;
elessair 0:f269e3021894 91 }
elessair 0:f269e3021894 92
elessair 0:f269e3021894 93 if (HAL_UART_Init(huart) != HAL_OK) {
elessair 0:f269e3021894 94 error("Cannot initialize UART\n");
elessair 0:f269e3021894 95 }
elessair 0:f269e3021894 96 }
elessair 0:f269e3021894 97
elessair 0:f269e3021894 98 void serial_init(serial_t *obj, PinName tx, PinName rx)
elessair 0:f269e3021894 99 {
elessair 0:f269e3021894 100 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 101
elessair 0:f269e3021894 102 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 103 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
elessair 0:f269e3021894 104 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
elessair 0:f269e3021894 105
elessair 0:f269e3021894 106 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 107 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
elessair 0:f269e3021894 108 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 109
elessair 0:f269e3021894 110 // Enable USART clock
elessair 0:f269e3021894 111 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 112 __HAL_RCC_USART1_FORCE_RESET();
elessair 0:f269e3021894 113 __HAL_RCC_USART1_RELEASE_RESET();
elessair 0:f269e3021894 114 __HAL_RCC_USART1_CLK_ENABLE();
elessair 0:f269e3021894 115 obj_s->index = 0;
elessair 0:f269e3021894 116 }
elessair 0:f269e3021894 117
elessair 0:f269e3021894 118 #if defined USART2_BASE
elessair 0:f269e3021894 119 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 120 __HAL_RCC_USART2_FORCE_RESET();
elessair 0:f269e3021894 121 __HAL_RCC_USART2_RELEASE_RESET();
elessair 0:f269e3021894 122 __HAL_RCC_USART2_CLK_ENABLE();
elessair 0:f269e3021894 123 obj_s->index = 1;
elessair 0:f269e3021894 124 }
elessair 0:f269e3021894 125 #endif
elessair 0:f269e3021894 126
elessair 0:f269e3021894 127 #if defined USART3_BASE
elessair 0:f269e3021894 128 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 129 __HAL_RCC_USART3_FORCE_RESET();
elessair 0:f269e3021894 130 __HAL_RCC_USART3_RELEASE_RESET();
elessair 0:f269e3021894 131 __HAL_RCC_USART3_CLK_ENABLE();
elessair 0:f269e3021894 132 obj_s->index = 2;
elessair 0:f269e3021894 133 }
elessair 0:f269e3021894 134 #endif
elessair 0:f269e3021894 135
elessair 0:f269e3021894 136 #if defined USART4_BASE
elessair 0:f269e3021894 137 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 138 __HAL_RCC_USART4_FORCE_RESET();
elessair 0:f269e3021894 139 __HAL_RCC_USART4_RELEASE_RESET();
elessair 0:f269e3021894 140 __HAL_RCC_USART4_CLK_ENABLE();
elessair 0:f269e3021894 141 obj_s->index = 3;
elessair 0:f269e3021894 142 }
elessair 0:f269e3021894 143 #endif
elessair 0:f269e3021894 144
elessair 0:f269e3021894 145 #if defined USART5_BASE
elessair 0:f269e3021894 146 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 147 __HAL_RCC_USART5_FORCE_RESET();
elessair 0:f269e3021894 148 __HAL_RCC_USART5_RELEASE_RESET();
elessair 0:f269e3021894 149 __HAL_RCC_USART5_CLK_ENABLE();
elessair 0:f269e3021894 150 obj_s->index = 4;
elessair 0:f269e3021894 151 }
elessair 0:f269e3021894 152 #endif
elessair 0:f269e3021894 153
elessair 0:f269e3021894 154 #if defined USART6_BASE
elessair 0:f269e3021894 155 if (obj_s->uart == UART_6) {
elessair 0:f269e3021894 156 __HAL_RCC_USART6_FORCE_RESET();
elessair 0:f269e3021894 157 __HAL_RCC_USART6_RELEASE_RESET();
elessair 0:f269e3021894 158 __HAL_RCC_USART6_CLK_ENABLE();
elessair 0:f269e3021894 159 obj_s->index = 5;
elessair 0:f269e3021894 160 }
elessair 0:f269e3021894 161 #endif
elessair 0:f269e3021894 162
elessair 0:f269e3021894 163 #if defined USART7_BASE
elessair 0:f269e3021894 164 if (obj_s->uart == UART_7) {
elessair 0:f269e3021894 165 __HAL_RCC_USART7_FORCE_RESET();
elessair 0:f269e3021894 166 __HAL_RCC_USART7_RELEASE_RESET();
elessair 0:f269e3021894 167 __HAL_RCC_USART7_CLK_ENABLE();
elessair 0:f269e3021894 168 obj_s->index = 6;
elessair 0:f269e3021894 169 }
elessair 0:f269e3021894 170 #endif
elessair 0:f269e3021894 171
elessair 0:f269e3021894 172 #if defined USART8_BASE
elessair 0:f269e3021894 173 if (obj_s->uart == UART_8) {
elessair 0:f269e3021894 174 __HAL_RCC_USART8_FORCE_RESET();
elessair 0:f269e3021894 175 __HAL_RCC_USART8_RELEASE_RESET();
elessair 0:f269e3021894 176 __HAL_RCC_USART8_CLK_ENABLE();
elessair 0:f269e3021894 177 obj_s->index = 7;
elessair 0:f269e3021894 178 }
elessair 0:f269e3021894 179 #endif
elessair 0:f269e3021894 180
elessair 0:f269e3021894 181 // Configure the UART pins
elessair 0:f269e3021894 182 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 183 pinmap_pinout(rx, PinMap_UART_RX);
elessair 0:f269e3021894 184
elessair 0:f269e3021894 185 if (tx != NC) {
elessair 0:f269e3021894 186 pin_mode(tx, PullUp);
elessair 0:f269e3021894 187 }
elessair 0:f269e3021894 188 if (rx != NC) {
elessair 0:f269e3021894 189 pin_mode(rx, PullUp);
elessair 0:f269e3021894 190 }
elessair 0:f269e3021894 191
elessair 0:f269e3021894 192 // Configure UART
elessair 0:f269e3021894 193 obj_s->baudrate = 9600;
elessair 0:f269e3021894 194 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 195 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 196 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 197
elessair 0:f269e3021894 198 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 199 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 200 #endif
elessair 0:f269e3021894 201
elessair 0:f269e3021894 202 obj_s->pin_tx = tx;
elessair 0:f269e3021894 203 obj_s->pin_rx = rx;
elessair 0:f269e3021894 204
elessair 0:f269e3021894 205 init_uart(obj);
elessair 0:f269e3021894 206
elessair 0:f269e3021894 207 // For stdio management
elessair 0:f269e3021894 208 if (obj_s->uart == STDIO_UART) {
elessair 0:f269e3021894 209 stdio_uart_inited = 1;
elessair 0:f269e3021894 210 memcpy(&stdio_uart, obj, sizeof(serial_t));
elessair 0:f269e3021894 211 }
elessair 0:f269e3021894 212 }
elessair 0:f269e3021894 213
elessair 0:f269e3021894 214 void serial_free(serial_t *obj)
elessair 0:f269e3021894 215 {
elessair 0:f269e3021894 216 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 217
elessair 0:f269e3021894 218 // Reset UART and disable clock
elessair 0:f269e3021894 219 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 220 __USART1_FORCE_RESET();
elessair 0:f269e3021894 221 __USART1_RELEASE_RESET();
elessair 0:f269e3021894 222 __USART1_CLK_DISABLE();
elessair 0:f269e3021894 223 }
elessair 0:f269e3021894 224
elessair 0:f269e3021894 225 #if defined(USART2_BASE)
elessair 0:f269e3021894 226 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 227 __USART2_FORCE_RESET();
elessair 0:f269e3021894 228 __USART2_RELEASE_RESET();
elessair 0:f269e3021894 229 __USART2_CLK_DISABLE();
elessair 0:f269e3021894 230 }
elessair 0:f269e3021894 231 #endif
elessair 0:f269e3021894 232
elessair 0:f269e3021894 233 #if defined USART3_BASE
elessair 0:f269e3021894 234 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 235 __USART3_FORCE_RESET();
elessair 0:f269e3021894 236 __USART3_RELEASE_RESET();
elessair 0:f269e3021894 237 __USART3_CLK_DISABLE();
elessair 0:f269e3021894 238 }
elessair 0:f269e3021894 239 #endif
elessair 0:f269e3021894 240
elessair 0:f269e3021894 241 #if defined USART4_BASE
elessair 0:f269e3021894 242 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 243 __USART4_FORCE_RESET();
elessair 0:f269e3021894 244 __USART4_RELEASE_RESET();
elessair 0:f269e3021894 245 __USART4_CLK_DISABLE();
elessair 0:f269e3021894 246 }
elessair 0:f269e3021894 247 #endif
elessair 0:f269e3021894 248
elessair 0:f269e3021894 249 #if defined USART5_BASE
elessair 0:f269e3021894 250 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 251 __USART5_FORCE_RESET();
elessair 0:f269e3021894 252 __USART5_RELEASE_RESET();
elessair 0:f269e3021894 253 __USART5_CLK_DISABLE();
elessair 0:f269e3021894 254 }
elessair 0:f269e3021894 255 #endif
elessair 0:f269e3021894 256
elessair 0:f269e3021894 257 #if defined USART6_BASE
elessair 0:f269e3021894 258 if (obj_s->uart == UART_6) {
elessair 0:f269e3021894 259 __USART6_FORCE_RESET();
elessair 0:f269e3021894 260 __USART6_RELEASE_RESET();
elessair 0:f269e3021894 261 __USART6_CLK_DISABLE();
elessair 0:f269e3021894 262 }
elessair 0:f269e3021894 263 #endif
elessair 0:f269e3021894 264
elessair 0:f269e3021894 265 #if defined USART7_BASE
elessair 0:f269e3021894 266 if (obj_s->uart == UART_7) {
elessair 0:f269e3021894 267 __USART7_FORCE_RESET();
elessair 0:f269e3021894 268 __USART7_RELEASE_RESET();
elessair 0:f269e3021894 269 __USART7_CLK_DISABLE();
elessair 0:f269e3021894 270 }
elessair 0:f269e3021894 271 #endif
elessair 0:f269e3021894 272
elessair 0:f269e3021894 273 #if defined USART8_BASE
elessair 0:f269e3021894 274 if (obj_s->uart == UART_8) {
elessair 0:f269e3021894 275 __USART8_FORCE_RESET();
elessair 0:f269e3021894 276 __USART8_RELEASE_RESET();
elessair 0:f269e3021894 277 __USART8_CLK_DISABLE();
elessair 0:f269e3021894 278 }
elessair 0:f269e3021894 279 #endif
elessair 0:f269e3021894 280
elessair 0:f269e3021894 281 // Configure GPIOs
elessair 0:f269e3021894 282 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 283 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 284
elessair 0:f269e3021894 285 serial_irq_ids[obj_s->index] = 0;
elessair 0:f269e3021894 286 }
elessair 0:f269e3021894 287
elessair 0:f269e3021894 288 void serial_baud(serial_t *obj, int baudrate)
elessair 0:f269e3021894 289 {
elessair 0:f269e3021894 290 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 291
elessair 0:f269e3021894 292 obj_s->baudrate = baudrate;
elessair 0:f269e3021894 293 init_uart(obj);
elessair 0:f269e3021894 294 }
elessair 0:f269e3021894 295
elessair 0:f269e3021894 296 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
elessair 0:f269e3021894 297 {
elessair 0:f269e3021894 298 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 299
elessair 0:f269e3021894 300 if (data_bits == 9) {
elessair 0:f269e3021894 301 obj_s->databits = UART_WORDLENGTH_9B;
elessair 0:f269e3021894 302 } else {
elessair 0:f269e3021894 303 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 304 }
elessair 0:f269e3021894 305
elessair 0:f269e3021894 306 switch (parity) {
elessair 0:f269e3021894 307 case ParityOdd:
elessair 0:f269e3021894 308 obj_s->parity = UART_PARITY_ODD;
elessair 0:f269e3021894 309 break;
elessair 0:f269e3021894 310 case ParityEven:
elessair 0:f269e3021894 311 obj_s->parity = UART_PARITY_EVEN;
elessair 0:f269e3021894 312 break;
elessair 0:f269e3021894 313 default: // ParityNone
elessair 0:f269e3021894 314 case ParityForced0: // unsupported!
elessair 0:f269e3021894 315 case ParityForced1: // unsupported!
elessair 0:f269e3021894 316 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 317 break;
elessair 0:f269e3021894 318 }
elessair 0:f269e3021894 319
elessair 0:f269e3021894 320 if (stop_bits == 2) {
elessair 0:f269e3021894 321 obj_s->stopbits = UART_STOPBITS_2;
elessair 0:f269e3021894 322 } else {
elessair 0:f269e3021894 323 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 324 }
elessair 0:f269e3021894 325
elessair 0:f269e3021894 326 init_uart(obj);
elessair 0:f269e3021894 327 }
elessair 0:f269e3021894 328
elessair 0:f269e3021894 329 /******************************************************************************
elessair 0:f269e3021894 330 * INTERRUPTS HANDLING
elessair 0:f269e3021894 331 ******************************************************************************/
elessair 0:f269e3021894 332
elessair 0:f269e3021894 333 static void uart_irq(int id)
elessair 0:f269e3021894 334 {
elessair 0:f269e3021894 335 UART_HandleTypeDef * huart = &uart_handlers[id];
elessair 0:f269e3021894 336
elessair 0:f269e3021894 337 if (serial_irq_ids[id] != 0) {
elessair 0:f269e3021894 338 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 339 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 340 irq_handler(serial_irq_ids[id], TxIrq);
elessair 0:f269e3021894 341 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 342 }
elessair 0:f269e3021894 343 }
elessair 0:f269e3021894 344 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
elessair 0:f269e3021894 345 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
elessair 0:f269e3021894 346 irq_handler(serial_irq_ids[id], RxIrq);
elessair 0:f269e3021894 347 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 348 }
elessair 0:f269e3021894 349 }
elessair 0:f269e3021894 350 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 351 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ORE) != RESET) {
elessair 0:f269e3021894 352 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 353 }
elessair 0:f269e3021894 354 }
elessair 0:f269e3021894 355 }
elessair 0:f269e3021894 356 }
elessair 0:f269e3021894 357
elessair 0:f269e3021894 358 static void uart1_irq(void)
elessair 0:f269e3021894 359 {
elessair 0:f269e3021894 360 uart_irq(0);
elessair 0:f269e3021894 361 }
elessair 0:f269e3021894 362
elessair 0:f269e3021894 363 #if defined(USART2_BASE)
elessair 0:f269e3021894 364 static void uart2_irq(void)
elessair 0:f269e3021894 365 {
elessair 0:f269e3021894 366 uart_irq(1);
elessair 0:f269e3021894 367 }
elessair 0:f269e3021894 368 #endif
elessair 0:f269e3021894 369
elessair 0:f269e3021894 370 #if defined USART3_BASE
elessair 0:f269e3021894 371 static void uart3_irq(void)
elessair 0:f269e3021894 372 {
elessair 0:f269e3021894 373 uart_irq(2);
elessair 0:f269e3021894 374 }
elessair 0:f269e3021894 375 #endif
elessair 0:f269e3021894 376
elessair 0:f269e3021894 377 #if defined USART4_BASE
elessair 0:f269e3021894 378 static void uart4_irq(void)
elessair 0:f269e3021894 379 {
elessair 0:f269e3021894 380 uart_irq(3);
elessair 0:f269e3021894 381 }
elessair 0:f269e3021894 382 #endif
elessair 0:f269e3021894 383
elessair 0:f269e3021894 384 #if defined USART5_BASE
elessair 0:f269e3021894 385 static void uart5_irq(void)
elessair 0:f269e3021894 386 {
elessair 0:f269e3021894 387 uart_irq(4);
elessair 0:f269e3021894 388 }
elessair 0:f269e3021894 389 #endif
elessair 0:f269e3021894 390
elessair 0:f269e3021894 391 #if defined USART6_BASE
elessair 0:f269e3021894 392 static void uart6_irq(void)
elessair 0:f269e3021894 393 {
elessair 0:f269e3021894 394 uart_irq(5);
elessair 0:f269e3021894 395 }
elessair 0:f269e3021894 396 #endif
elessair 0:f269e3021894 397
elessair 0:f269e3021894 398 #if defined USART7_BASE
elessair 0:f269e3021894 399 static void uart7_irq(void)
elessair 0:f269e3021894 400 {
elessair 0:f269e3021894 401 uart_irq(6);
elessair 0:f269e3021894 402 }
elessair 0:f269e3021894 403 #endif
elessair 0:f269e3021894 404
elessair 0:f269e3021894 405 #if defined USART8_BASE
elessair 0:f269e3021894 406 static void uart8_irq(void)
elessair 0:f269e3021894 407 {
elessair 0:f269e3021894 408 uart_irq(7);
elessair 0:f269e3021894 409 }
elessair 0:f269e3021894 410 #endif
elessair 0:f269e3021894 411
elessair 0:f269e3021894 412 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
elessair 0:f269e3021894 413 {
elessair 0:f269e3021894 414 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 415
elessair 0:f269e3021894 416 irq_handler = handler;
elessair 0:f269e3021894 417 serial_irq_ids[obj_s->index] = id;
elessair 0:f269e3021894 418 }
elessair 0:f269e3021894 419
elessair 0:f269e3021894 420 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
elessair 0:f269e3021894 421 {
elessair 0:f269e3021894 422 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 423 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 424 IRQn_Type irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 425 uint32_t vector = 0;
elessair 0:f269e3021894 426
elessair 0:f269e3021894 427 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 428 irq_n = USART1_IRQn;
elessair 0:f269e3021894 429 vector = (uint32_t)&uart1_irq;
elessair 0:f269e3021894 430 }
elessair 0:f269e3021894 431
elessair 0:f269e3021894 432 #if defined(USART2_BASE)
elessair 0:f269e3021894 433 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 434 irq_n = USART2_IRQn;
elessair 0:f269e3021894 435 vector = (uint32_t)&uart2_irq;
elessair 0:f269e3021894 436 }
elessair 0:f269e3021894 437 #endif
elessair 0:f269e3021894 438
elessair 0:f269e3021894 439 #if defined (TARGET_STM32F091RC)
elessair 0:f269e3021894 440 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 441 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 442 vector = (uint32_t)&uart3_irq;
elessair 0:f269e3021894 443 }
elessair 0:f269e3021894 444
elessair 0:f269e3021894 445 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 446 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 447 vector = (uint32_t)&uart4_irq;
elessair 0:f269e3021894 448 }
elessair 0:f269e3021894 449
elessair 0:f269e3021894 450 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 451 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 452 vector = (uint32_t)&uart5_irq;
elessair 0:f269e3021894 453 }
elessair 0:f269e3021894 454
elessair 0:f269e3021894 455 if (obj_s->uart == UART_6) {
elessair 0:f269e3021894 456 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 457 vector = (uint32_t)&uart6_irq;
elessair 0:f269e3021894 458 }
elessair 0:f269e3021894 459
elessair 0:f269e3021894 460 if (obj_s->uart == UART_7) {
elessair 0:f269e3021894 461 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 462 vector = (uint32_t)&uart7_irq;
elessair 0:f269e3021894 463 }
elessair 0:f269e3021894 464
elessair 0:f269e3021894 465 if (obj_s->uart == UART_8) {
elessair 0:f269e3021894 466 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 467 vector = (uint32_t)&uart8_irq;
elessair 0:f269e3021894 468 }
elessair 0:f269e3021894 469
elessair 0:f269e3021894 470 #elif defined (TARGET_STM32F030R8) || defined (TARGET_STM32F051R8)
elessair 0:f269e3021894 471
elessair 0:f269e3021894 472 #else
elessair 0:f269e3021894 473 #if defined(USART3_BASE)
elessair 0:f269e3021894 474 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 475 irq_n = USART3_4_IRQn;
elessair 0:f269e3021894 476 vector = (uint32_t)&uart3_irq;
elessair 0:f269e3021894 477 }
elessair 0:f269e3021894 478 #endif
elessair 0:f269e3021894 479
elessair 0:f269e3021894 480 #if defined(USART4_BASE)
elessair 0:f269e3021894 481 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 482 irq_n = USART3_4_IRQn;
elessair 0:f269e3021894 483 vector = (uint32_t)&uart4_irq;
elessair 0:f269e3021894 484 }
elessair 0:f269e3021894 485 #endif
elessair 0:f269e3021894 486 #endif
elessair 0:f269e3021894 487
elessair 0:f269e3021894 488 if (enable) {
elessair 0:f269e3021894 489 if (irq == RxIrq) {
elessair 0:f269e3021894 490 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 491 } else { // TxIrq
elessair 0:f269e3021894 492 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 493 }
elessair 0:f269e3021894 494 NVIC_SetVector(irq_n, vector);
elessair 0:f269e3021894 495 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 496
elessair 0:f269e3021894 497 } else { // disable
elessair 0:f269e3021894 498 int all_disabled = 0;
elessair 0:f269e3021894 499 if (irq == RxIrq) {
elessair 0:f269e3021894 500 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 501 // Check if TxIrq is disabled too
elessair 0:f269e3021894 502 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
elessair 0:f269e3021894 503 all_disabled = 1;
elessair 0:f269e3021894 504 }
elessair 0:f269e3021894 505 } else { // TxIrq
elessair 0:f269e3021894 506 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 507 // Check if RxIrq is disabled too
elessair 0:f269e3021894 508 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
elessair 0:f269e3021894 509 all_disabled = 1;
elessair 0:f269e3021894 510 }
elessair 0:f269e3021894 511 }
elessair 0:f269e3021894 512
elessair 0:f269e3021894 513 if (all_disabled) {
elessair 0:f269e3021894 514 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 515 }
elessair 0:f269e3021894 516 }
elessair 0:f269e3021894 517 }
elessair 0:f269e3021894 518
elessair 0:f269e3021894 519 /******************************************************************************
elessair 0:f269e3021894 520 * READ/WRITE
elessair 0:f269e3021894 521 ******************************************************************************/
elessair 0:f269e3021894 522
elessair 0:f269e3021894 523 int serial_getc(serial_t *obj)
elessair 0:f269e3021894 524 {
elessair 0:f269e3021894 525 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 526 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 527
elessair 0:f269e3021894 528 while (!serial_readable(obj));
elessair 0:f269e3021894 529 return (int)(huart->Instance->RDR & (uint16_t)0xFF);
elessair 0:f269e3021894 530 }
elessair 0:f269e3021894 531
elessair 0:f269e3021894 532 void serial_putc(serial_t *obj, int c)
elessair 0:f269e3021894 533 {
elessair 0:f269e3021894 534 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 535 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 536
elessair 0:f269e3021894 537 while (!serial_writable(obj));
elessair 0:f269e3021894 538 huart->Instance->TDR = (uint32_t)(c & (uint16_t)0xFF);
elessair 0:f269e3021894 539 }
elessair 0:f269e3021894 540
elessair 0:f269e3021894 541 int serial_readable(serial_t *obj)
elessair 0:f269e3021894 542 {
elessair 0:f269e3021894 543 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 544 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 545
elessair 0:f269e3021894 546 // Check if data is received
elessair 0:f269e3021894 547 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 548 }
elessair 0:f269e3021894 549
elessair 0:f269e3021894 550 int serial_writable(serial_t *obj)
elessair 0:f269e3021894 551 {
elessair 0:f269e3021894 552 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 553 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 554
elessair 0:f269e3021894 555 // Check if data is transmitted
elessair 0:f269e3021894 556 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 557 }
elessair 0:f269e3021894 558
elessair 0:f269e3021894 559 void serial_clear(serial_t *obj)
elessair 0:f269e3021894 560 {
elessair 0:f269e3021894 561 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 562 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 563
elessair 0:f269e3021894 564 huart->TxXferCount = 0;
elessair 0:f269e3021894 565 huart->RxXferCount = 0;
elessair 0:f269e3021894 566 }
elessair 0:f269e3021894 567
elessair 0:f269e3021894 568 void serial_pinout_tx(PinName tx)
elessair 0:f269e3021894 569 {
elessair 0:f269e3021894 570 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 571 }
elessair 0:f269e3021894 572
elessair 0:f269e3021894 573 void serial_break_set(serial_t *obj)
elessair 0:f269e3021894 574 {
elessair 0:f269e3021894 575 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 576 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 577
elessair 0:f269e3021894 578 //HAL_LIN_SendBreak(huart);
elessair 0:f269e3021894 579 }
elessair 0:f269e3021894 580
elessair 0:f269e3021894 581 void serial_break_clear(serial_t *obj)
elessair 0:f269e3021894 582 {
elessair 0:f269e3021894 583 (void)obj;
elessair 0:f269e3021894 584 }
elessair 0:f269e3021894 585
elessair 0:f269e3021894 586 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 587
elessair 0:f269e3021894 588 /******************************************************************************
elessair 0:f269e3021894 589 * LOCAL HELPER FUNCTIONS
elessair 0:f269e3021894 590 ******************************************************************************/
elessair 0:f269e3021894 591
elessair 0:f269e3021894 592 /**
elessair 0:f269e3021894 593 * Configure the TX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 594 *
elessair 0:f269e3021894 595 * @param obj The serial object.
elessair 0:f269e3021894 596 * @param tx The buffer for sending.
elessair 0:f269e3021894 597 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 598 */
elessair 0:f269e3021894 599 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
elessair 0:f269e3021894 600 {
elessair 0:f269e3021894 601 (void)width;
elessair 0:f269e3021894 602
elessair 0:f269e3021894 603 // Exit if a transmit is already on-going
elessair 0:f269e3021894 604 if (serial_tx_active(obj)) {
elessair 0:f269e3021894 605 return;
elessair 0:f269e3021894 606 }
elessair 0:f269e3021894 607
elessair 0:f269e3021894 608 obj->tx_buff.buffer = tx;
elessair 0:f269e3021894 609 obj->tx_buff.length = tx_length;
elessair 0:f269e3021894 610 obj->tx_buff.pos = 0;
elessair 0:f269e3021894 611 }
elessair 0:f269e3021894 612
elessair 0:f269e3021894 613 /**
elessair 0:f269e3021894 614 * Configure the RX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 615 *
elessair 0:f269e3021894 616 * @param obj The serial object.
elessair 0:f269e3021894 617 * @param tx The buffer for sending.
elessair 0:f269e3021894 618 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 619 */
elessair 0:f269e3021894 620 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
elessair 0:f269e3021894 621 {
elessair 0:f269e3021894 622 (void)width;
elessair 0:f269e3021894 623
elessair 0:f269e3021894 624 // Exit if a reception is already on-going
elessair 0:f269e3021894 625 if (serial_rx_active(obj)) {
elessair 0:f269e3021894 626 return;
elessair 0:f269e3021894 627 }
elessair 0:f269e3021894 628
elessair 0:f269e3021894 629 obj->rx_buff.buffer = rx;
elessair 0:f269e3021894 630 obj->rx_buff.length = rx_length;
elessair 0:f269e3021894 631 obj->rx_buff.pos = 0;
elessair 0:f269e3021894 632 }
elessair 0:f269e3021894 633
elessair 0:f269e3021894 634 /**
elessair 0:f269e3021894 635 * Configure events
elessair 0:f269e3021894 636 *
elessair 0:f269e3021894 637 * @param obj The serial object
elessair 0:f269e3021894 638 * @param event The logical OR of the events to configure
elessair 0:f269e3021894 639 * @param enable Set to non-zero to enable events, or zero to disable them
elessair 0:f269e3021894 640 */
elessair 0:f269e3021894 641 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
elessair 0:f269e3021894 642 {
elessair 0:f269e3021894 643 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 644
elessair 0:f269e3021894 645 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
elessair 0:f269e3021894 646 if (enable) {
elessair 0:f269e3021894 647 obj_s->events |= event;
elessair 0:f269e3021894 648 } else {
elessair 0:f269e3021894 649 obj_s->events &= ~event;
elessair 0:f269e3021894 650 }
elessair 0:f269e3021894 651 }
elessair 0:f269e3021894 652
elessair 0:f269e3021894 653
elessair 0:f269e3021894 654 /**
elessair 0:f269e3021894 655 * Get index of serial object TX IRQ, relating it to the physical peripheral.
elessair 0:f269e3021894 656 *
elessair 0:f269e3021894 657 * @param obj pointer to serial object
elessair 0:f269e3021894 658 * @return internal NVIC TX IRQ index of U(S)ART peripheral
elessair 0:f269e3021894 659 */
elessair 0:f269e3021894 660 static IRQn_Type serial_get_irq_n(serial_t *obj)
elessair 0:f269e3021894 661 {
elessair 0:f269e3021894 662 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 663 IRQn_Type irq_n;
elessair 0:f269e3021894 664
elessair 0:f269e3021894 665 switch (obj_s->index) {
elessair 0:f269e3021894 666 #if defined(USART1_BASE)
elessair 0:f269e3021894 667 case 0:
elessair 0:f269e3021894 668 irq_n = USART1_IRQn;
elessair 0:f269e3021894 669 break;
elessair 0:f269e3021894 670 #endif
elessair 0:f269e3021894 671 #if defined(USART2_BASE)
elessair 0:f269e3021894 672 case 1:
elessair 0:f269e3021894 673 irq_n = USART2_IRQn;
elessair 0:f269e3021894 674 break;
elessair 0:f269e3021894 675 #endif
elessair 0:f269e3021894 676 #if defined (TARGET_STM32F091RC)
elessair 0:f269e3021894 677 case 2:
elessair 0:f269e3021894 678 case 3:
elessair 0:f269e3021894 679 case 4:
elessair 0:f269e3021894 680 case 5:
elessair 0:f269e3021894 681 case 6:
elessair 0:f269e3021894 682 case 7:
elessair 0:f269e3021894 683 irq_n = USART3_8_IRQn;
elessair 0:f269e3021894 684 break;
elessair 0:f269e3021894 685 #elif !defined (TARGET_STM32F030R8) && !defined (TARGET_STM32F051R8)
elessair 0:f269e3021894 686 case 2:
elessair 0:f269e3021894 687 case 3:
elessair 0:f269e3021894 688 irq_n = USART3_4_IRQn;
elessair 0:f269e3021894 689 break;
elessair 0:f269e3021894 690 #endif
elessair 0:f269e3021894 691 default:
elessair 0:f269e3021894 692 irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 693 }
elessair 0:f269e3021894 694
elessair 0:f269e3021894 695 return irq_n;
elessair 0:f269e3021894 696 }
elessair 0:f269e3021894 697
elessair 0:f269e3021894 698
elessair 0:f269e3021894 699 /******************************************************************************
elessair 0:f269e3021894 700 * MBED API FUNCTIONS
elessair 0:f269e3021894 701 ******************************************************************************/
elessair 0:f269e3021894 702
elessair 0:f269e3021894 703 /**
elessair 0:f269e3021894 704 * Begin asynchronous TX transfer. The used buffer is specified in the serial
elessair 0:f269e3021894 705 * object, tx_buff
elessair 0:f269e3021894 706 *
elessair 0:f269e3021894 707 * @param obj The serial object
elessair 0:f269e3021894 708 * @param tx The buffer for sending
elessair 0:f269e3021894 709 * @param tx_length The number of words to transmit
elessair 0:f269e3021894 710 * @param tx_width The bit width of buffer word
elessair 0:f269e3021894 711 * @param handler The serial handler
elessair 0:f269e3021894 712 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 713 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 714 * @return Returns number of data transfered, or 0 otherwise
elessair 0:f269e3021894 715 */
elessair 0:f269e3021894 716 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 717 {
elessair 0:f269e3021894 718 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 719 (void) hint;
elessair 0:f269e3021894 720
elessair 0:f269e3021894 721 // Check buffer is ok
elessair 0:f269e3021894 722 MBED_ASSERT(tx != (void*)0);
elessair 0:f269e3021894 723 MBED_ASSERT(tx_width == 8); // support only 8b width
elessair 0:f269e3021894 724
elessair 0:f269e3021894 725 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 726 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 727
elessair 0:f269e3021894 728 if (tx_length == 0) {
elessair 0:f269e3021894 729 return 0;
elessair 0:f269e3021894 730 }
elessair 0:f269e3021894 731
elessair 0:f269e3021894 732 // Set up buffer
elessair 0:f269e3021894 733 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
elessair 0:f269e3021894 734
elessair 0:f269e3021894 735 // Set up events
elessair 0:f269e3021894 736 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
elessair 0:f269e3021894 737 serial_enable_event(obj, event, 1); // Set only the wanted events
elessair 0:f269e3021894 738
elessair 0:f269e3021894 739 // Enable interrupt
elessair 0:f269e3021894 740 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 741 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 742 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 743 NVIC_SetPriority(irq_n, 1);
elessair 0:f269e3021894 744 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 745 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 746
elessair 0:f269e3021894 747 // the following function will enable UART_IT_TXE and error interrupts
elessair 0:f269e3021894 748 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
elessair 0:f269e3021894 749 return 0;
elessair 0:f269e3021894 750 }
elessair 0:f269e3021894 751
elessair 0:f269e3021894 752 return tx_length;
elessair 0:f269e3021894 753 }
elessair 0:f269e3021894 754
elessair 0:f269e3021894 755 /**
elessair 0:f269e3021894 756 * Begin asynchronous RX transfer (enable interrupt for data collecting)
elessair 0:f269e3021894 757 * The used buffer is specified in the serial object, rx_buff
elessair 0:f269e3021894 758 *
elessair 0:f269e3021894 759 * @param obj The serial object
elessair 0:f269e3021894 760 * @param rx The buffer for sending
elessair 0:f269e3021894 761 * @param rx_length The number of words to transmit
elessair 0:f269e3021894 762 * @param rx_width The bit width of buffer word
elessair 0:f269e3021894 763 * @param handler The serial handler
elessair 0:f269e3021894 764 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 765 * @param handler The serial handler
elessair 0:f269e3021894 766 * @param char_match A character in range 0-254 to be matched
elessair 0:f269e3021894 767 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 768 */
elessair 0:f269e3021894 769 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 770 {
elessair 0:f269e3021894 771 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 772 (void) hint;
elessair 0:f269e3021894 773
elessair 0:f269e3021894 774 /* Sanity check arguments */
elessair 0:f269e3021894 775 MBED_ASSERT(obj);
elessair 0:f269e3021894 776 MBED_ASSERT(rx != (void*)0);
elessair 0:f269e3021894 777 MBED_ASSERT(rx_width == 8); // support only 8b width
elessair 0:f269e3021894 778
elessair 0:f269e3021894 779 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 780 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 781
elessair 0:f269e3021894 782 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
elessair 0:f269e3021894 783 serial_enable_event(obj, event, 1);
elessair 0:f269e3021894 784
elessair 0:f269e3021894 785 // set CharMatch
elessair 0:f269e3021894 786 obj->char_match = char_match;
elessair 0:f269e3021894 787
elessair 0:f269e3021894 788 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
elessair 0:f269e3021894 789
elessair 0:f269e3021894 790 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 791 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 792 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 793 NVIC_SetPriority(irq_n, 0);
elessair 0:f269e3021894 794 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 795 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 796
elessair 0:f269e3021894 797 // following HAL function will enable the RXNE interrupt + error interrupts
elessair 0:f269e3021894 798 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
elessair 0:f269e3021894 799 }
elessair 0:f269e3021894 800
elessair 0:f269e3021894 801 /**
elessair 0:f269e3021894 802 * Attempts to determine if the serial peripheral is already in use for TX
elessair 0:f269e3021894 803 *
elessair 0:f269e3021894 804 * @param obj The serial object
elessair 0:f269e3021894 805 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 806 */
elessair 0:f269e3021894 807 uint8_t serial_tx_active(serial_t *obj)
elessair 0:f269e3021894 808 {
elessair 0:f269e3021894 809 MBED_ASSERT(obj);
elessair 0:f269e3021894 810
elessair 0:f269e3021894 811 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 812 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 813
elessair 0:f269e3021894 814 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
elessair 0:f269e3021894 815 }
elessair 0:f269e3021894 816
elessair 0:f269e3021894 817 /**
elessair 0:f269e3021894 818 * Attempts to determine if the serial peripheral is already in use for RX
elessair 0:f269e3021894 819 *
elessair 0:f269e3021894 820 * @param obj The serial object
elessair 0:f269e3021894 821 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 822 */
elessair 0:f269e3021894 823 uint8_t serial_rx_active(serial_t *obj)
elessair 0:f269e3021894 824 {
elessair 0:f269e3021894 825 MBED_ASSERT(obj);
elessair 0:f269e3021894 826
elessair 0:f269e3021894 827 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 828 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 829
elessair 0:f269e3021894 830 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
elessair 0:f269e3021894 831 }
elessair 0:f269e3021894 832
elessair 0:f269e3021894 833 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 834 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 835 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 836 }
elessair 0:f269e3021894 837 }
elessair 0:f269e3021894 838
elessair 0:f269e3021894 839 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 840 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 841 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF);
elessair 0:f269e3021894 842 }
elessair 0:f269e3021894 843 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 844 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_FEF);
elessair 0:f269e3021894 845 }
elessair 0:f269e3021894 846 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
elessair 0:f269e3021894 847 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_NEF);
elessair 0:f269e3021894 848 }
elessair 0:f269e3021894 849 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 850 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 851 }
elessair 0:f269e3021894 852 }
elessair 0:f269e3021894 853
elessair 0:f269e3021894 854 /**
elessair 0:f269e3021894 855 * The asynchronous TX and RX handler.
elessair 0:f269e3021894 856 *
elessair 0:f269e3021894 857 * @param obj The serial object
elessair 0:f269e3021894 858 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
elessair 0:f269e3021894 859 */
elessair 0:f269e3021894 860 int serial_irq_handler_asynch(serial_t *obj)
elessair 0:f269e3021894 861 {
elessair 0:f269e3021894 862 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 863 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 864
elessair 0:f269e3021894 865 volatile int return_event = 0;
elessair 0:f269e3021894 866 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
elessair 0:f269e3021894 867 uint8_t i = 0;
elessair 0:f269e3021894 868
elessair 0:f269e3021894 869 // TX PART:
elessair 0:f269e3021894 870 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 871 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 872 // Return event SERIAL_EVENT_TX_COMPLETE if requested
elessair 0:f269e3021894 873 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
elessair 0:f269e3021894 874 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 875 }
elessair 0:f269e3021894 876 }
elessair 0:f269e3021894 877 }
elessair 0:f269e3021894 878
elessair 0:f269e3021894 879 // Handle error events
elessair 0:f269e3021894 880 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 881 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 882 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
elessair 0:f269e3021894 883 }
elessair 0:f269e3021894 884 }
elessair 0:f269e3021894 885
elessair 0:f269e3021894 886 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 887 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 888 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
elessair 0:f269e3021894 889 }
elessair 0:f269e3021894 890 }
elessair 0:f269e3021894 891
elessair 0:f269e3021894 892 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 893 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 894 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
elessair 0:f269e3021894 895 }
elessair 0:f269e3021894 896 }
elessair 0:f269e3021894 897
elessair 0:f269e3021894 898 HAL_UART_IRQHandler(huart);
elessair 0:f269e3021894 899
elessair 0:f269e3021894 900 // Abort if an error occurs
elessair 0:f269e3021894 901 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
elessair 0:f269e3021894 902 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
elessair 0:f269e3021894 903 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
elessair 0:f269e3021894 904 return return_event;
elessair 0:f269e3021894 905 }
elessair 0:f269e3021894 906
elessair 0:f269e3021894 907 //RX PART
elessair 0:f269e3021894 908 if (huart->RxXferSize != 0) {
elessair 0:f269e3021894 909 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
elessair 0:f269e3021894 910 }
elessair 0:f269e3021894 911 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
elessair 0:f269e3021894 912 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 913 }
elessair 0:f269e3021894 914
elessair 0:f269e3021894 915 // Check if char_match is present
elessair 0:f269e3021894 916 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
elessair 0:f269e3021894 917 if (buf != NULL) {
elessair 0:f269e3021894 918 for (i = 0; i < obj->rx_buff.pos; i++) {
elessair 0:f269e3021894 919 if (buf[i] == obj->char_match) {
elessair 0:f269e3021894 920 obj->rx_buff.pos = i;
elessair 0:f269e3021894 921 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
elessair 0:f269e3021894 922 serial_rx_abort_asynch(obj);
elessair 0:f269e3021894 923 break;
elessair 0:f269e3021894 924 }
elessair 0:f269e3021894 925 }
elessair 0:f269e3021894 926 }
elessair 0:f269e3021894 927 }
elessair 0:f269e3021894 928
elessair 0:f269e3021894 929 return return_event;
elessair 0:f269e3021894 930 }
elessair 0:f269e3021894 931
elessair 0:f269e3021894 932 /**
elessair 0:f269e3021894 933 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elessair 0:f269e3021894 934 * flush TX hardware buffer if TX FIFO is used
elessair 0:f269e3021894 935 *
elessair 0:f269e3021894 936 * @param obj The serial object
elessair 0:f269e3021894 937 */
elessair 0:f269e3021894 938 void serial_tx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 939 {
elessair 0:f269e3021894 940 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 941 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 942
elessair 0:f269e3021894 943 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 944 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
elessair 0:f269e3021894 945
elessair 0:f269e3021894 946 // clear flags
elessair 0:f269e3021894 947 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 948
elessair 0:f269e3021894 949 // reset states
elessair 0:f269e3021894 950 huart->TxXferCount = 0;
elessair 0:f269e3021894 951 // update handle state
elessair 0:f269e3021894 952 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 953 huart->gState = HAL_UART_STATE_BUSY_RX;
elessair 0:f269e3021894 954 } else {
elessair 0:f269e3021894 955 huart->gState = HAL_UART_STATE_READY;
elessair 0:f269e3021894 956 }
elessair 0:f269e3021894 957 }
elessair 0:f269e3021894 958
elessair 0:f269e3021894 959 /**
elessair 0:f269e3021894 960 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
elessair 0:f269e3021894 961 * flush RX hardware buffer if RX FIFO is used
elessair 0:f269e3021894 962 *
elessair 0:f269e3021894 963 * @param obj The serial object
elessair 0:f269e3021894 964 */
elessair 0:f269e3021894 965 void serial_rx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 966 {
elessair 0:f269e3021894 967 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 968 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 969
elessair 0:f269e3021894 970 // disable interrupts
elessair 0:f269e3021894 971 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 972 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
elessair 0:f269e3021894 973 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
elessair 0:f269e3021894 974
elessair 0:f269e3021894 975 // clear flags
elessair 0:f269e3021894 976 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF | UART_CLEAR_FEF | UART_CLEAR_OREF);
elessair 0:f269e3021894 977 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 978
elessair 0:f269e3021894 979 // reset states
elessair 0:f269e3021894 980 huart->RxXferCount = 0;
elessair 0:f269e3021894 981 // update handle state
elessair 0:f269e3021894 982 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 983 huart->RxState = HAL_UART_STATE_BUSY_TX;
elessair 0:f269e3021894 984 } else {
elessair 0:f269e3021894 985 huart->RxState = HAL_UART_STATE_READY;
elessair 0:f269e3021894 986 }
elessair 0:f269e3021894 987 }
elessair 0:f269e3021894 988
elessair 0:f269e3021894 989 #endif
elessair 0:f269e3021894 990
elessair 0:f269e3021894 991 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 992
elessair 0:f269e3021894 993 /**
elessair 0:f269e3021894 994 * Set HW Control Flow
elessair 0:f269e3021894 995 * @param obj The serial object
elessair 0:f269e3021894 996 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
elessair 0:f269e3021894 997 * @param rxflow Pin for the rxflow
elessair 0:f269e3021894 998 * @param txflow Pin for the txflow
elessair 0:f269e3021894 999 */
elessair 0:f269e3021894 1000 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
elessair 0:f269e3021894 1001 {
elessair 0:f269e3021894 1002 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 1003
elessair 0:f269e3021894 1004 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 1005 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 1006 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 1007
elessair 0:f269e3021894 1008 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 1009 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
elessair 0:f269e3021894 1010 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 1011
elessair 0:f269e3021894 1012 if(type == FlowControlNone) {
elessair 0:f269e3021894 1013 // Disable hardware flow control
elessair 0:f269e3021894 1014 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 1015 }
elessair 0:f269e3021894 1016 if (type == FlowControlRTS) {
elessair 0:f269e3021894 1017 // Enable RTS
elessair 0:f269e3021894 1018 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 1019 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
elessair 0:f269e3021894 1020 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 1021 // Enable the pin for RTS function
elessair 0:f269e3021894 1022 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 1023 }
elessair 0:f269e3021894 1024 if (type == FlowControlCTS) {
elessair 0:f269e3021894 1025 // Enable CTS
elessair 0:f269e3021894 1026 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 1027 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
elessair 0:f269e3021894 1028 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 1029 // Enable the pin for CTS function
elessair 0:f269e3021894 1030 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 1031 }
elessair 0:f269e3021894 1032 if (type == FlowControlRTSCTS) {
elessair 0:f269e3021894 1033 // Enable CTS & RTS
elessair 0:f269e3021894 1034 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 1035 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 1036 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
elessair 0:f269e3021894 1037 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 1038 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 1039 // Enable the pin for CTS function
elessair 0:f269e3021894 1040 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 1041 // Enable the pin for RTS function
elessair 0:f269e3021894 1042 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 1043 }
elessair 0:f269e3021894 1044
elessair 0:f269e3021894 1045 init_uart(obj);
elessair 0:f269e3021894 1046 }
elessair 0:f269e3021894 1047
elessair 0:f269e3021894 1048 #endif
elessair 0:f269e3021894 1049
elessair 0:f269e3021894 1050 #endif