mbed official / mbed-dev

mbed library sources. Supersedes mbed-src.

Dependents:   Nucleo_Hello_Encoder BLE_iBeaconScan AM1805_DEMO DISCO-F429ZI_ExportTemplate1 ... more

targets/TARGET_STM/TARGET_STM32F1/serial_device.c@177:d650f5d4c87a, 2017-11-08 (annotated)

Committer:
AnnaBridge
Date:
Wed Nov 08 13:50:44 2017 +0000
Revision:
177:d650f5d4c87a
Parent:
170:19eb464bc2be
Child:
180:96ed750bd169
This updates the lib to the mbed lib v 155

Who changed what in which revision?

UserRevisionLine numberNew contents of line
AnnaBridge 167:e84263d55307 1 /* mbed Microcontroller Library
AnnaBridge 167:e84263d55307 2 *******************************************************************************
AnnaBridge 167:e84263d55307 3 * Copyright (c) 2014, STMicroelectronics
AnnaBridge 167:e84263d55307 4 * All rights reserved.
AnnaBridge 167:e84263d55307 5 *
AnnaBridge 167:e84263d55307 6 * Redistribution and use in source and binary forms, with or without
AnnaBridge 167:e84263d55307 7 * modification, are permitted provided that the following conditions are met:
AnnaBridge 167:e84263d55307 8 *
AnnaBridge 167:e84263d55307 9 * 1. Redistributions of source code must retain the above copyright notice,
AnnaBridge 167:e84263d55307 10 * this list of conditions and the following disclaimer.
AnnaBridge 167:e84263d55307 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
AnnaBridge 167:e84263d55307 12 * this list of conditions and the following disclaimer in the documentation
AnnaBridge 167:e84263d55307 13 * and/or other materials provided with the distribution.
AnnaBridge 167:e84263d55307 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
AnnaBridge 167:e84263d55307 15 * may be used to endorse or promote products derived from this software
AnnaBridge 167:e84263d55307 16 * without specific prior written permission.
AnnaBridge 167:e84263d55307 17 *
AnnaBridge 167:e84263d55307 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AnnaBridge 167:e84263d55307 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
AnnaBridge 167:e84263d55307 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
AnnaBridge 167:e84263d55307 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
AnnaBridge 167:e84263d55307 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
AnnaBridge 167:e84263d55307 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
AnnaBridge 167:e84263d55307 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
AnnaBridge 167:e84263d55307 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
AnnaBridge 167:e84263d55307 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
AnnaBridge 167:e84263d55307 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
AnnaBridge 167:e84263d55307 28 *******************************************************************************
AnnaBridge 167:e84263d55307 29 */
AnnaBridge 167:e84263d55307 30 #include "mbed_assert.h"
AnnaBridge 167:e84263d55307 31 #include "serial_api.h"
AnnaBridge 167:e84263d55307 32 #include "serial_api_hal.h"
AnnaBridge 167:e84263d55307 33
AnnaBridge 167:e84263d55307 34 #if DEVICE_SERIAL
AnnaBridge 167:e84263d55307 35
AnnaBridge 167:e84263d55307 36 #include "cmsis.h"
AnnaBridge 167:e84263d55307 37 #include "pinmap.h"
AnnaBridge 167:e84263d55307 38 #include "mbed_error.h"
AnnaBridge 167:e84263d55307 39 #include <string.h>
AnnaBridge 167:e84263d55307 40 #include "PeripheralPins.h"
AnnaBridge 167:e84263d55307 41
AnnaBridge 167:e84263d55307 42 #define UART_NUM (3)
AnnaBridge 167:e84263d55307 43
AnnaBridge 167:e84263d55307 44 static uint32_t serial_irq_ids[UART_NUM] = {0};
AnnaBridge 167:e84263d55307 45 UART_HandleTypeDef uart_handlers[UART_NUM];
AnnaBridge 167:e84263d55307 46
AnnaBridge 167:e84263d55307 47 static uart_irq_handler irq_handler;
AnnaBridge 167:e84263d55307 48
AnnaBridge 167:e84263d55307 49 int stdio_uart_inited = 0;
AnnaBridge 167:e84263d55307 50 serial_t stdio_uart;
AnnaBridge 167:e84263d55307 51
AnnaBridge 167:e84263d55307 52 void serial_init(serial_t *obj, PinName tx, PinName rx)
AnnaBridge 167:e84263d55307 53 {
AnnaBridge 167:e84263d55307 54 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 55
AnnaBridge 167:e84263d55307 56 // Determine the UART to use (UART_1, UART_2, ...)
AnnaBridge 167:e84263d55307 57 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
AnnaBridge 167:e84263d55307 58 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
AnnaBridge 167:e84263d55307 59
AnnaBridge 167:e84263d55307 60 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
AnnaBridge 167:e84263d55307 61 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
AnnaBridge 167:e84263d55307 62 MBED_ASSERT(obj_s->uart != (UARTName)NC);
AnnaBridge 167:e84263d55307 63
AnnaBridge 167:e84263d55307 64 // Enable USART clock
AnnaBridge 167:e84263d55307 65 if (obj_s->uart == UART_1) {
AnnaBridge 167:e84263d55307 66 __HAL_RCC_USART1_FORCE_RESET();
AnnaBridge 167:e84263d55307 67 __HAL_RCC_USART1_RELEASE_RESET();
AnnaBridge 167:e84263d55307 68 __HAL_RCC_USART1_CLK_ENABLE();
AnnaBridge 167:e84263d55307 69 obj_s->index = 0;
AnnaBridge 167:e84263d55307 70 }
AnnaBridge 167:e84263d55307 71 if (obj_s->uart == UART_2) {
AnnaBridge 167:e84263d55307 72 __HAL_RCC_USART2_FORCE_RESET();
AnnaBridge 167:e84263d55307 73 __HAL_RCC_USART2_RELEASE_RESET();
AnnaBridge 167:e84263d55307 74 __HAL_RCC_USART2_CLK_ENABLE();
AnnaBridge 167:e84263d55307 75 obj_s->index = 1;
AnnaBridge 167:e84263d55307 76 }
AnnaBridge 167:e84263d55307 77 if (obj_s->uart == UART_3) {
AnnaBridge 167:e84263d55307 78 __HAL_RCC_USART3_FORCE_RESET();
AnnaBridge 167:e84263d55307 79 __HAL_RCC_USART3_RELEASE_RESET();
AnnaBridge 167:e84263d55307 80 __HAL_RCC_USART3_CLK_ENABLE();
AnnaBridge 167:e84263d55307 81 obj_s->index = 2;
AnnaBridge 167:e84263d55307 82 }
AnnaBridge 167:e84263d55307 83
AnnaBridge 167:e84263d55307 84 // Configure UART pins
AnnaBridge 167:e84263d55307 85 pinmap_pinout(tx, PinMap_UART_TX);
AnnaBridge 167:e84263d55307 86 pinmap_pinout(rx, PinMap_UART_RX);
AnnaBridge 167:e84263d55307 87
AnnaBridge 167:e84263d55307 88 if (tx != NC) {
AnnaBridge 167:e84263d55307 89 pin_mode(tx, PullUp);
AnnaBridge 167:e84263d55307 90 }
AnnaBridge 167:e84263d55307 91 if (rx != NC) {
AnnaBridge 167:e84263d55307 92 pin_mode(rx, PullUp);
AnnaBridge 167:e84263d55307 93 }
AnnaBridge 167:e84263d55307 94
AnnaBridge 167:e84263d55307 95 // Configure UART
AnnaBridge 167:e84263d55307 96 obj_s->baudrate = 9600;
AnnaBridge 167:e84263d55307 97 obj_s->databits = UART_WORDLENGTH_8B;
AnnaBridge 167:e84263d55307 98 obj_s->stopbits = UART_STOPBITS_1;
AnnaBridge 167:e84263d55307 99 obj_s->parity = UART_PARITY_NONE;
AnnaBridge 167:e84263d55307 100
AnnaBridge 167:e84263d55307 101 #if DEVICE_SERIAL_FC
AnnaBridge 167:e84263d55307 102 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
AnnaBridge 167:e84263d55307 103 #endif
AnnaBridge 167:e84263d55307 104
AnnaBridge 167:e84263d55307 105 obj_s->pin_tx = tx;
AnnaBridge 167:e84263d55307 106 obj_s->pin_rx = rx;
AnnaBridge 167:e84263d55307 107
AnnaBridge 167:e84263d55307 108 init_uart(obj);
AnnaBridge 167:e84263d55307 109
AnnaBridge 167:e84263d55307 110 // For stdio management
AnnaBridge 167:e84263d55307 111 if (obj_s->uart == STDIO_UART) {
AnnaBridge 167:e84263d55307 112 stdio_uart_inited = 1;
AnnaBridge 167:e84263d55307 113 memcpy(&stdio_uart, obj, sizeof(serial_t));
AnnaBridge 167:e84263d55307 114 }
AnnaBridge 167:e84263d55307 115 }
AnnaBridge 167:e84263d55307 116
AnnaBridge 167:e84263d55307 117 void serial_free(serial_t *obj)
AnnaBridge 167:e84263d55307 118 {
AnnaBridge 167:e84263d55307 119 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 120
AnnaBridge 167:e84263d55307 121 // Reset UART and disable clock
AnnaBridge 167:e84263d55307 122 if (obj_s->uart == UART_1) {
AnnaBridge 167:e84263d55307 123 __HAL_RCC_USART1_FORCE_RESET();
AnnaBridge 167:e84263d55307 124 __HAL_RCC_USART1_RELEASE_RESET();
AnnaBridge 167:e84263d55307 125 __HAL_RCC_USART1_CLK_DISABLE();
AnnaBridge 167:e84263d55307 126 }
AnnaBridge 167:e84263d55307 127 if (obj_s->uart == UART_2) {
AnnaBridge 167:e84263d55307 128 __HAL_RCC_USART2_FORCE_RESET();
AnnaBridge 167:e84263d55307 129 __HAL_RCC_USART2_RELEASE_RESET();
AnnaBridge 167:e84263d55307 130 __HAL_RCC_USART2_CLK_DISABLE();
AnnaBridge 167:e84263d55307 131 }
AnnaBridge 167:e84263d55307 132 if (obj_s->uart == UART_3) {
AnnaBridge 167:e84263d55307 133 __HAL_RCC_USART3_FORCE_RESET();
AnnaBridge 167:e84263d55307 134 __HAL_RCC_USART3_RELEASE_RESET();
AnnaBridge 167:e84263d55307 135 __HAL_RCC_USART3_CLK_DISABLE();
AnnaBridge 167:e84263d55307 136 }
AnnaBridge 167:e84263d55307 137
AnnaBridge 167:e84263d55307 138 // Configure GPIOs
AnnaBridge 167:e84263d55307 139 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
AnnaBridge 167:e84263d55307 140 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
AnnaBridge 167:e84263d55307 141
AnnaBridge 167:e84263d55307 142 serial_irq_ids[obj_s->index] = 0;
AnnaBridge 167:e84263d55307 143 }
AnnaBridge 167:e84263d55307 144
AnnaBridge 167:e84263d55307 145 void serial_baud(serial_t *obj, int baudrate)
AnnaBridge 167:e84263d55307 146 {
AnnaBridge 167:e84263d55307 147 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 148
AnnaBridge 167:e84263d55307 149 obj_s->baudrate = baudrate;
AnnaBridge 167:e84263d55307 150 init_uart(obj);
AnnaBridge 167:e84263d55307 151 }
AnnaBridge 167:e84263d55307 152
AnnaBridge 167:e84263d55307 153 /******************************************************************************
AnnaBridge 167:e84263d55307 154 * INTERRUPTS HANDLING
AnnaBridge 167:e84263d55307 155 ******************************************************************************/
AnnaBridge 167:e84263d55307 156
AnnaBridge 167:e84263d55307 157 static void uart_irq(int id)
AnnaBridge 167:e84263d55307 158 {
AnnaBridge 167:e84263d55307 159 UART_HandleTypeDef * huart = &uart_handlers[id];
AnnaBridge 167:e84263d55307 160
AnnaBridge 167:e84263d55307 161 if (serial_irq_ids[id] != 0) {
Kojto 170:19eb464bc2be 162 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) {
Kojto 170:19eb464bc2be 163 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TXE) != RESET) {
AnnaBridge 167:e84263d55307 164 irq_handler(serial_irq_ids[id], TxIrq);
AnnaBridge 167:e84263d55307 165 }
AnnaBridge 167:e84263d55307 166 }
AnnaBridge 167:e84263d55307 167 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
AnnaBridge 167:e84263d55307 168 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
AnnaBridge 167:e84263d55307 169 irq_handler(serial_irq_ids[id], RxIrq);
Kojto 170:19eb464bc2be 170 /* Flag has been cleared when reading the content */
AnnaBridge 167:e84263d55307 171 }
AnnaBridge 167:e84263d55307 172 }
AnnaBridge 167:e84263d55307 173 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
AnnaBridge 167:e84263d55307 174 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
AnnaBridge 177:d650f5d4c87a 175 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear ORE flag
AnnaBridge 167:e84263d55307 176 }
AnnaBridge 167:e84263d55307 177 }
AnnaBridge 167:e84263d55307 178 }
AnnaBridge 167:e84263d55307 179 }
AnnaBridge 167:e84263d55307 180
AnnaBridge 167:e84263d55307 181 static void uart1_irq(void)
AnnaBridge 167:e84263d55307 182 {
AnnaBridge 167:e84263d55307 183 uart_irq(0);
AnnaBridge 167:e84263d55307 184 }
AnnaBridge 167:e84263d55307 185
AnnaBridge 167:e84263d55307 186 static void uart2_irq(void)
AnnaBridge 167:e84263d55307 187 {
AnnaBridge 167:e84263d55307 188 uart_irq(1);
AnnaBridge 167:e84263d55307 189 }
AnnaBridge 167:e84263d55307 190
AnnaBridge 167:e84263d55307 191 static void uart3_irq(void)
AnnaBridge 167:e84263d55307 192 {
AnnaBridge 167:e84263d55307 193 uart_irq(2);
AnnaBridge 167:e84263d55307 194 }
AnnaBridge 167:e84263d55307 195
AnnaBridge 167:e84263d55307 196 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
AnnaBridge 167:e84263d55307 197 {
AnnaBridge 167:e84263d55307 198 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 199
AnnaBridge 167:e84263d55307 200 irq_handler = handler;
AnnaBridge 167:e84263d55307 201 serial_irq_ids[obj_s->index] = id;
AnnaBridge 167:e84263d55307 202 }
AnnaBridge 167:e84263d55307 203
AnnaBridge 167:e84263d55307 204 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
AnnaBridge 167:e84263d55307 205 {
AnnaBridge 167:e84263d55307 206 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 207 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 208 IRQn_Type irq_n = (IRQn_Type)0;
AnnaBridge 167:e84263d55307 209 uint32_t vector = 0;
AnnaBridge 167:e84263d55307 210
AnnaBridge 167:e84263d55307 211 if (obj_s->uart == UART_1) {
AnnaBridge 167:e84263d55307 212 irq_n = USART1_IRQn;
AnnaBridge 167:e84263d55307 213 vector = (uint32_t)&uart1_irq;
AnnaBridge 167:e84263d55307 214 }
AnnaBridge 167:e84263d55307 215
AnnaBridge 167:e84263d55307 216 if (obj_s->uart == UART_2) {
AnnaBridge 167:e84263d55307 217 irq_n = USART2_IRQn;
AnnaBridge 167:e84263d55307 218 vector = (uint32_t)&uart2_irq;
AnnaBridge 167:e84263d55307 219 }
AnnaBridge 167:e84263d55307 220
AnnaBridge 167:e84263d55307 221 if (obj_s->uart == UART_3) {
AnnaBridge 167:e84263d55307 222 irq_n = USART3_IRQn;
AnnaBridge 167:e84263d55307 223 vector = (uint32_t)&uart3_irq;
AnnaBridge 167:e84263d55307 224 }
AnnaBridge 167:e84263d55307 225
AnnaBridge 167:e84263d55307 226 if (enable) {
AnnaBridge 167:e84263d55307 227 if (irq == RxIrq) {
AnnaBridge 167:e84263d55307 228 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
AnnaBridge 167:e84263d55307 229 } else { // TxIrq
Kojto 170:19eb464bc2be 230 __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
AnnaBridge 167:e84263d55307 231 }
AnnaBridge 167:e84263d55307 232 NVIC_SetVector(irq_n, vector);
AnnaBridge 167:e84263d55307 233 NVIC_EnableIRQ(irq_n);
AnnaBridge 167:e84263d55307 234
AnnaBridge 167:e84263d55307 235 } else { // disable
AnnaBridge 167:e84263d55307 236 int all_disabled = 0;
AnnaBridge 167:e84263d55307 237 if (irq == RxIrq) {
AnnaBridge 167:e84263d55307 238 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
AnnaBridge 167:e84263d55307 239 // Check if TxIrq is disabled too
AnnaBridge 167:e84263d55307 240 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
AnnaBridge 167:e84263d55307 241 all_disabled = 1;
AnnaBridge 167:e84263d55307 242 }
AnnaBridge 167:e84263d55307 243 } else { // TxIrq
Kojto 170:19eb464bc2be 244 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
AnnaBridge 167:e84263d55307 245 // Check if RxIrq is disabled too
AnnaBridge 167:e84263d55307 246 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
AnnaBridge 167:e84263d55307 247 all_disabled = 1;
AnnaBridge 167:e84263d55307 248 }
AnnaBridge 167:e84263d55307 249 }
AnnaBridge 167:e84263d55307 250
AnnaBridge 167:e84263d55307 251 if (all_disabled) {
AnnaBridge 167:e84263d55307 252 NVIC_DisableIRQ(irq_n);
AnnaBridge 167:e84263d55307 253 }
AnnaBridge 167:e84263d55307 254 }
AnnaBridge 167:e84263d55307 255 }
AnnaBridge 167:e84263d55307 256
AnnaBridge 167:e84263d55307 257 /******************************************************************************
AnnaBridge 167:e84263d55307 258 * READ/WRITE
AnnaBridge 167:e84263d55307 259 ******************************************************************************/
AnnaBridge 167:e84263d55307 260
AnnaBridge 167:e84263d55307 261 int serial_getc(serial_t *obj)
AnnaBridge 167:e84263d55307 262 {
AnnaBridge 167:e84263d55307 263 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 264 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 265
AnnaBridge 167:e84263d55307 266 while (!serial_readable(obj));
AnnaBridge 167:e84263d55307 267 if (obj_s->databits == UART_WORDLENGTH_8B) {
AnnaBridge 167:e84263d55307 268 return (int)(huart->Instance->DR & (uint8_t)0xFF);
AnnaBridge 167:e84263d55307 269 } else {
AnnaBridge 167:e84263d55307 270 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
AnnaBridge 167:e84263d55307 271 }
AnnaBridge 167:e84263d55307 272 }
AnnaBridge 167:e84263d55307 273
AnnaBridge 167:e84263d55307 274 void serial_putc(serial_t *obj, int c)
AnnaBridge 167:e84263d55307 275 {
AnnaBridge 167:e84263d55307 276 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 277 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 278
AnnaBridge 167:e84263d55307 279 while (!serial_writable(obj));
AnnaBridge 167:e84263d55307 280 if (obj_s->databits == UART_WORDLENGTH_8B) {
AnnaBridge 167:e84263d55307 281 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
AnnaBridge 167:e84263d55307 282 } else {
AnnaBridge 167:e84263d55307 283 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
AnnaBridge 167:e84263d55307 284 }
AnnaBridge 167:e84263d55307 285 }
AnnaBridge 167:e84263d55307 286
AnnaBridge 167:e84263d55307 287 void serial_clear(serial_t *obj)
AnnaBridge 167:e84263d55307 288 {
AnnaBridge 167:e84263d55307 289 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 290 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 291
AnnaBridge 167:e84263d55307 292 huart->TxXferCount = 0;
AnnaBridge 167:e84263d55307 293 huart->RxXferCount = 0;
AnnaBridge 167:e84263d55307 294 }
AnnaBridge 167:e84263d55307 295
AnnaBridge 167:e84263d55307 296 void serial_break_set(serial_t *obj)
AnnaBridge 167:e84263d55307 297 {
AnnaBridge 167:e84263d55307 298 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 299 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 300
AnnaBridge 167:e84263d55307 301 HAL_LIN_SendBreak(huart);
AnnaBridge 167:e84263d55307 302 }
AnnaBridge 167:e84263d55307 303
AnnaBridge 167:e84263d55307 304 #if DEVICE_SERIAL_ASYNCH
AnnaBridge 167:e84263d55307 305
AnnaBridge 167:e84263d55307 306 /******************************************************************************
AnnaBridge 167:e84263d55307 307 * LOCAL HELPER FUNCTIONS
AnnaBridge 167:e84263d55307 308 ******************************************************************************/
AnnaBridge 167:e84263d55307 309
AnnaBridge 167:e84263d55307 310 /**
AnnaBridge 167:e84263d55307 311 * Configure the TX buffer for an asynchronous write serial transaction
AnnaBridge 167:e84263d55307 312 *
AnnaBridge 167:e84263d55307 313 * @param obj The serial object.
AnnaBridge 167:e84263d55307 314 * @param tx The buffer for sending.
AnnaBridge 167:e84263d55307 315 * @param tx_length The number of words to transmit.
AnnaBridge 167:e84263d55307 316 */
AnnaBridge 167:e84263d55307 317 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
AnnaBridge 167:e84263d55307 318 {
AnnaBridge 167:e84263d55307 319 (void)width;
AnnaBridge 167:e84263d55307 320
AnnaBridge 167:e84263d55307 321 // Exit if a transmit is already on-going
AnnaBridge 167:e84263d55307 322 if (serial_tx_active(obj)) {
AnnaBridge 167:e84263d55307 323 return;
AnnaBridge 167:e84263d55307 324 }
AnnaBridge 167:e84263d55307 325
AnnaBridge 167:e84263d55307 326 obj->tx_buff.buffer = tx;
AnnaBridge 167:e84263d55307 327 obj->tx_buff.length = tx_length;
AnnaBridge 167:e84263d55307 328 obj->tx_buff.pos = 0;
AnnaBridge 167:e84263d55307 329 }
AnnaBridge 167:e84263d55307 330
AnnaBridge 167:e84263d55307 331 /**
AnnaBridge 167:e84263d55307 332 * Configure the RX buffer for an asynchronous write serial transaction
AnnaBridge 167:e84263d55307 333 *
AnnaBridge 167:e84263d55307 334 * @param obj The serial object.
AnnaBridge 167:e84263d55307 335 * @param tx The buffer for sending.
AnnaBridge 167:e84263d55307 336 * @param tx_length The number of words to transmit.
AnnaBridge 167:e84263d55307 337 */
AnnaBridge 167:e84263d55307 338 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
AnnaBridge 167:e84263d55307 339 {
AnnaBridge 167:e84263d55307 340 (void)width;
AnnaBridge 167:e84263d55307 341
AnnaBridge 167:e84263d55307 342 // Exit if a reception is already on-going
AnnaBridge 167:e84263d55307 343 if (serial_rx_active(obj)) {
AnnaBridge 167:e84263d55307 344 return;
AnnaBridge 167:e84263d55307 345 }
AnnaBridge 167:e84263d55307 346
AnnaBridge 167:e84263d55307 347 obj->rx_buff.buffer = rx;
AnnaBridge 167:e84263d55307 348 obj->rx_buff.length = rx_length;
AnnaBridge 167:e84263d55307 349 obj->rx_buff.pos = 0;
AnnaBridge 167:e84263d55307 350 }
AnnaBridge 167:e84263d55307 351
AnnaBridge 167:e84263d55307 352 /**
AnnaBridge 167:e84263d55307 353 * Configure events
AnnaBridge 167:e84263d55307 354 *
AnnaBridge 167:e84263d55307 355 * @param obj The serial object
AnnaBridge 167:e84263d55307 356 * @param event The logical OR of the events to configure
AnnaBridge 167:e84263d55307 357 * @param enable Set to non-zero to enable events, or zero to disable them
AnnaBridge 167:e84263d55307 358 */
AnnaBridge 167:e84263d55307 359 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
AnnaBridge 167:e84263d55307 360 {
AnnaBridge 167:e84263d55307 361 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 362
AnnaBridge 167:e84263d55307 363 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
AnnaBridge 167:e84263d55307 364 if (enable) {
AnnaBridge 167:e84263d55307 365 obj_s->events |= event;
AnnaBridge 167:e84263d55307 366 } else {
AnnaBridge 167:e84263d55307 367 obj_s->events &= ~event;
AnnaBridge 167:e84263d55307 368 }
AnnaBridge 167:e84263d55307 369 }
AnnaBridge 167:e84263d55307 370
AnnaBridge 167:e84263d55307 371
AnnaBridge 167:e84263d55307 372 /**
AnnaBridge 167:e84263d55307 373 * Get index of serial object TX IRQ, relating it to the physical peripheral.
AnnaBridge 167:e84263d55307 374 *
AnnaBridge 167:e84263d55307 375 * @param obj pointer to serial object
AnnaBridge 167:e84263d55307 376 * @return internal NVIC TX IRQ index of U(S)ART peripheral
AnnaBridge 167:e84263d55307 377 */
AnnaBridge 167:e84263d55307 378 static IRQn_Type serial_get_irq_n(serial_t *obj)
AnnaBridge 167:e84263d55307 379 {
AnnaBridge 167:e84263d55307 380 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 381 IRQn_Type irq_n;
AnnaBridge 167:e84263d55307 382
AnnaBridge 167:e84263d55307 383 switch (obj_s->index) {
AnnaBridge 167:e84263d55307 384 case 0:
AnnaBridge 167:e84263d55307 385 irq_n = USART1_IRQn;
AnnaBridge 167:e84263d55307 386 break;
AnnaBridge 167:e84263d55307 387
AnnaBridge 167:e84263d55307 388 case 1:
AnnaBridge 167:e84263d55307 389 irq_n = USART2_IRQn;
AnnaBridge 167:e84263d55307 390 break;
AnnaBridge 167:e84263d55307 391
AnnaBridge 167:e84263d55307 392 case 2:
AnnaBridge 167:e84263d55307 393 irq_n = USART3_IRQn;
AnnaBridge 167:e84263d55307 394 break;
AnnaBridge 167:e84263d55307 395
AnnaBridge 167:e84263d55307 396 default:
AnnaBridge 167:e84263d55307 397 irq_n = (IRQn_Type)0;
AnnaBridge 167:e84263d55307 398 }
AnnaBridge 167:e84263d55307 399
AnnaBridge 167:e84263d55307 400 return irq_n;
AnnaBridge 167:e84263d55307 401 }
AnnaBridge 167:e84263d55307 402
AnnaBridge 167:e84263d55307 403 /******************************************************************************
AnnaBridge 167:e84263d55307 404 * MBED API FUNCTIONS
AnnaBridge 167:e84263d55307 405 ******************************************************************************/
AnnaBridge 167:e84263d55307 406
AnnaBridge 167:e84263d55307 407 /**
AnnaBridge 167:e84263d55307 408 * Begin asynchronous TX transfer. The used buffer is specified in the serial
AnnaBridge 167:e84263d55307 409 * object, tx_buff
AnnaBridge 167:e84263d55307 410 *
AnnaBridge 167:e84263d55307 411 * @param obj The serial object
AnnaBridge 167:e84263d55307 412 * @param tx The buffer for sending
AnnaBridge 167:e84263d55307 413 * @param tx_length The number of words to transmit
AnnaBridge 167:e84263d55307 414 * @param tx_width The bit width of buffer word
AnnaBridge 167:e84263d55307 415 * @param handler The serial handler
AnnaBridge 167:e84263d55307 416 * @param event The logical OR of events to be registered
AnnaBridge 167:e84263d55307 417 * @param hint A suggestion for how to use DMA with this transfer
AnnaBridge 167:e84263d55307 418 * @return Returns number of data transfered, or 0 otherwise
AnnaBridge 167:e84263d55307 419 */
AnnaBridge 167:e84263d55307 420 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)
AnnaBridge 167:e84263d55307 421 {
AnnaBridge 167:e84263d55307 422 // TODO: DMA usage is currently ignored
AnnaBridge 167:e84263d55307 423 (void) hint;
AnnaBridge 167:e84263d55307 424
AnnaBridge 167:e84263d55307 425 // Check buffer is ok
AnnaBridge 167:e84263d55307 426 MBED_ASSERT(tx != (void*)0);
AnnaBridge 167:e84263d55307 427 MBED_ASSERT(tx_width == 8); // support only 8b width
AnnaBridge 167:e84263d55307 428
AnnaBridge 167:e84263d55307 429 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 430 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 431
AnnaBridge 167:e84263d55307 432 if (tx_length == 0) {
AnnaBridge 167:e84263d55307 433 return 0;
AnnaBridge 167:e84263d55307 434 }
AnnaBridge 167:e84263d55307 435
AnnaBridge 167:e84263d55307 436 // Set up buffer
AnnaBridge 167:e84263d55307 437 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
AnnaBridge 167:e84263d55307 438
AnnaBridge 167:e84263d55307 439 // Set up events
AnnaBridge 167:e84263d55307 440 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
AnnaBridge 167:e84263d55307 441 serial_enable_event(obj, event, 1); // Set only the wanted events
AnnaBridge 167:e84263d55307 442
AnnaBridge 167:e84263d55307 443 // Enable interrupt
AnnaBridge 167:e84263d55307 444 IRQn_Type irq_n = serial_get_irq_n(obj);
AnnaBridge 167:e84263d55307 445 NVIC_ClearPendingIRQ(irq_n);
AnnaBridge 167:e84263d55307 446 NVIC_DisableIRQ(irq_n);
AnnaBridge 167:e84263d55307 447 NVIC_SetPriority(irq_n, 1);
AnnaBridge 167:e84263d55307 448 NVIC_SetVector(irq_n, (uint32_t)handler);
AnnaBridge 167:e84263d55307 449 NVIC_EnableIRQ(irq_n);
AnnaBridge 167:e84263d55307 450
AnnaBridge 167:e84263d55307 451 // the following function will enable UART_IT_TXE and error interrupts
AnnaBridge 167:e84263d55307 452 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
AnnaBridge 167:e84263d55307 453 return 0;
AnnaBridge 167:e84263d55307 454 }
AnnaBridge 167:e84263d55307 455
AnnaBridge 167:e84263d55307 456 return tx_length;
AnnaBridge 167:e84263d55307 457 }
AnnaBridge 167:e84263d55307 458
AnnaBridge 167:e84263d55307 459 /**
AnnaBridge 167:e84263d55307 460 * Begin asynchronous RX transfer (enable interrupt for data collecting)
AnnaBridge 167:e84263d55307 461 * The used buffer is specified in the serial object, rx_buff
AnnaBridge 167:e84263d55307 462 *
AnnaBridge 167:e84263d55307 463 * @param obj The serial object
AnnaBridge 167:e84263d55307 464 * @param rx The buffer for sending
AnnaBridge 167:e84263d55307 465 * @param rx_length The number of words to transmit
AnnaBridge 167:e84263d55307 466 * @param rx_width The bit width of buffer word
AnnaBridge 167:e84263d55307 467 * @param handler The serial handler
AnnaBridge 167:e84263d55307 468 * @param event The logical OR of events to be registered
AnnaBridge 167:e84263d55307 469 * @param handler The serial handler
AnnaBridge 167:e84263d55307 470 * @param char_match A character in range 0-254 to be matched
AnnaBridge 167:e84263d55307 471 * @param hint A suggestion for how to use DMA with this transfer
AnnaBridge 167:e84263d55307 472 */
AnnaBridge 167:e84263d55307 473 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)
AnnaBridge 167:e84263d55307 474 {
AnnaBridge 167:e84263d55307 475 // TODO: DMA usage is currently ignored
AnnaBridge 167:e84263d55307 476 (void) hint;
AnnaBridge 167:e84263d55307 477
AnnaBridge 167:e84263d55307 478 /* Sanity check arguments */
AnnaBridge 167:e84263d55307 479 MBED_ASSERT(obj);
AnnaBridge 167:e84263d55307 480 MBED_ASSERT(rx != (void*)0);
AnnaBridge 167:e84263d55307 481 MBED_ASSERT(rx_width == 8); // support only 8b width
AnnaBridge 167:e84263d55307 482
AnnaBridge 167:e84263d55307 483 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 484 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 485
AnnaBridge 167:e84263d55307 486 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
AnnaBridge 167:e84263d55307 487 serial_enable_event(obj, event, 1);
AnnaBridge 167:e84263d55307 488
AnnaBridge 167:e84263d55307 489 // set CharMatch
AnnaBridge 167:e84263d55307 490 obj->char_match = char_match;
AnnaBridge 167:e84263d55307 491
AnnaBridge 167:e84263d55307 492 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
AnnaBridge 167:e84263d55307 493
AnnaBridge 167:e84263d55307 494 IRQn_Type irq_n = serial_get_irq_n(obj);
AnnaBridge 167:e84263d55307 495 NVIC_ClearPendingIRQ(irq_n);
AnnaBridge 167:e84263d55307 496 NVIC_DisableIRQ(irq_n);
AnnaBridge 167:e84263d55307 497 NVIC_SetPriority(irq_n, 0);
AnnaBridge 167:e84263d55307 498 NVIC_SetVector(irq_n, (uint32_t)handler);
AnnaBridge 167:e84263d55307 499 NVIC_EnableIRQ(irq_n);
AnnaBridge 167:e84263d55307 500
AnnaBridge 167:e84263d55307 501 // following HAL function will enable the RXNE interrupt + error interrupts
AnnaBridge 167:e84263d55307 502 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
AnnaBridge 167:e84263d55307 503 }
AnnaBridge 167:e84263d55307 504
AnnaBridge 167:e84263d55307 505 /**
AnnaBridge 167:e84263d55307 506 * Attempts to determine if the serial peripheral is already in use for TX
AnnaBridge 167:e84263d55307 507 *
AnnaBridge 167:e84263d55307 508 * @param obj The serial object
AnnaBridge 167:e84263d55307 509 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
AnnaBridge 167:e84263d55307 510 */
AnnaBridge 167:e84263d55307 511 uint8_t serial_tx_active(serial_t *obj)
AnnaBridge 167:e84263d55307 512 {
AnnaBridge 167:e84263d55307 513 MBED_ASSERT(obj);
AnnaBridge 167:e84263d55307 514
AnnaBridge 167:e84263d55307 515 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 516 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 517
AnnaBridge 167:e84263d55307 518 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
AnnaBridge 167:e84263d55307 519 }
AnnaBridge 167:e84263d55307 520
AnnaBridge 167:e84263d55307 521 /**
AnnaBridge 167:e84263d55307 522 * Attempts to determine if the serial peripheral is already in use for RX
AnnaBridge 167:e84263d55307 523 *
AnnaBridge 167:e84263d55307 524 * @param obj The serial object
AnnaBridge 167:e84263d55307 525 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
AnnaBridge 167:e84263d55307 526 */
AnnaBridge 167:e84263d55307 527 uint8_t serial_rx_active(serial_t *obj)
AnnaBridge 167:e84263d55307 528 {
AnnaBridge 167:e84263d55307 529 MBED_ASSERT(obj);
AnnaBridge 167:e84263d55307 530
AnnaBridge 167:e84263d55307 531 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 532 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 533
AnnaBridge 167:e84263d55307 534 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
AnnaBridge 167:e84263d55307 535 }
AnnaBridge 167:e84263d55307 536
AnnaBridge 167:e84263d55307 537 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
AnnaBridge 167:e84263d55307 538 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
AnnaBridge 167:e84263d55307 539 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
AnnaBridge 167:e84263d55307 540 }
AnnaBridge 167:e84263d55307 541 }
AnnaBridge 167:e84263d55307 542
AnnaBridge 167:e84263d55307 543 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
AnnaBridge 167:e84263d55307 544 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
AnnaBridge 177:d650f5d4c87a 545 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear PE flag
AnnaBridge 167:e84263d55307 546 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
AnnaBridge 177:d650f5d4c87a 547 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear FE flag
AnnaBridge 167:e84263d55307 548 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
AnnaBridge 177:d650f5d4c87a 549 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear NE flag
AnnaBridge 167:e84263d55307 550 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
AnnaBridge 177:d650f5d4c87a 551 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear ORE flag
AnnaBridge 167:e84263d55307 552 }
AnnaBridge 167:e84263d55307 553 }
AnnaBridge 167:e84263d55307 554
AnnaBridge 167:e84263d55307 555 /**
AnnaBridge 167:e84263d55307 556 * The asynchronous TX and RX handler.
AnnaBridge 167:e84263d55307 557 *
AnnaBridge 167:e84263d55307 558 * @param obj The serial object
AnnaBridge 167:e84263d55307 559 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
AnnaBridge 167:e84263d55307 560 */
AnnaBridge 167:e84263d55307 561 int serial_irq_handler_asynch(serial_t *obj)
AnnaBridge 167:e84263d55307 562 {
AnnaBridge 167:e84263d55307 563 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 564 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 565
AnnaBridge 167:e84263d55307 566 volatile int return_event = 0;
AnnaBridge 167:e84263d55307 567 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
AnnaBridge 167:e84263d55307 568 uint8_t i = 0;
AnnaBridge 167:e84263d55307 569
AnnaBridge 167:e84263d55307 570 // TX PART:
AnnaBridge 167:e84263d55307 571 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
AnnaBridge 167:e84263d55307 572 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
AnnaBridge 167:e84263d55307 573 // Return event SERIAL_EVENT_TX_COMPLETE if requested
AnnaBridge 167:e84263d55307 574 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
AnnaBridge 167:e84263d55307 575 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
AnnaBridge 167:e84263d55307 576 }
AnnaBridge 167:e84263d55307 577 }
AnnaBridge 167:e84263d55307 578 }
AnnaBridge 167:e84263d55307 579
AnnaBridge 167:e84263d55307 580 // Handle error events
AnnaBridge 167:e84263d55307 581 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
AnnaBridge 167:e84263d55307 582 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
AnnaBridge 167:e84263d55307 583 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
AnnaBridge 167:e84263d55307 584 }
AnnaBridge 167:e84263d55307 585 }
AnnaBridge 167:e84263d55307 586
AnnaBridge 167:e84263d55307 587 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
AnnaBridge 167:e84263d55307 588 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
AnnaBridge 167:e84263d55307 589 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
AnnaBridge 167:e84263d55307 590 }
AnnaBridge 167:e84263d55307 591 }
AnnaBridge 167:e84263d55307 592
AnnaBridge 167:e84263d55307 593 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
AnnaBridge 167:e84263d55307 594 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
AnnaBridge 167:e84263d55307 595 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
AnnaBridge 167:e84263d55307 596 }
AnnaBridge 167:e84263d55307 597 }
AnnaBridge 167:e84263d55307 598
AnnaBridge 167:e84263d55307 599 HAL_UART_IRQHandler(huart);
AnnaBridge 167:e84263d55307 600
AnnaBridge 167:e84263d55307 601 // Abort if an error occurs
AnnaBridge 177:d650f5d4c87a 602 if ((return_event & SERIAL_EVENT_RX_PARITY_ERROR) ||
AnnaBridge 177:d650f5d4c87a 603 (return_event & SERIAL_EVENT_RX_FRAMING_ERROR) ||
AnnaBridge 177:d650f5d4c87a 604 (return_event & SERIAL_EVENT_RX_OVERRUN_ERROR)) {
AnnaBridge 167:e84263d55307 605 return return_event;
AnnaBridge 167:e84263d55307 606 }
AnnaBridge 167:e84263d55307 607
AnnaBridge 167:e84263d55307 608 //RX PART
AnnaBridge 167:e84263d55307 609 if (huart->RxXferSize != 0) {
AnnaBridge 167:e84263d55307 610 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
AnnaBridge 167:e84263d55307 611 }
AnnaBridge 167:e84263d55307 612 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
AnnaBridge 167:e84263d55307 613 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
AnnaBridge 167:e84263d55307 614 }
AnnaBridge 167:e84263d55307 615
AnnaBridge 167:e84263d55307 616 // Check if char_match is present
AnnaBridge 167:e84263d55307 617 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
AnnaBridge 167:e84263d55307 618 if (buf != NULL) {
AnnaBridge 167:e84263d55307 619 for (i = 0; i < obj->rx_buff.pos; i++) {
AnnaBridge 167:e84263d55307 620 if (buf[i] == obj->char_match) {
AnnaBridge 167:e84263d55307 621 obj->rx_buff.pos = i;
AnnaBridge 167:e84263d55307 622 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
AnnaBridge 167:e84263d55307 623 serial_rx_abort_asynch(obj);
AnnaBridge 167:e84263d55307 624 break;
AnnaBridge 167:e84263d55307 625 }
AnnaBridge 167:e84263d55307 626 }
AnnaBridge 167:e84263d55307 627 }
AnnaBridge 167:e84263d55307 628 }
AnnaBridge 167:e84263d55307 629
AnnaBridge 167:e84263d55307 630 return return_event;
AnnaBridge 167:e84263d55307 631 }
AnnaBridge 167:e84263d55307 632
AnnaBridge 167:e84263d55307 633 /**
AnnaBridge 167:e84263d55307 634 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
AnnaBridge 167:e84263d55307 635 * flush TX hardware buffer if TX FIFO is used
AnnaBridge 167:e84263d55307 636 *
AnnaBridge 167:e84263d55307 637 * @param obj The serial object
AnnaBridge 167:e84263d55307 638 */
AnnaBridge 167:e84263d55307 639 void serial_tx_abort_asynch(serial_t *obj)
AnnaBridge 167:e84263d55307 640 {
AnnaBridge 167:e84263d55307 641 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 642 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 643
AnnaBridge 167:e84263d55307 644 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
AnnaBridge 167:e84263d55307 645 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
AnnaBridge 167:e84263d55307 646
AnnaBridge 167:e84263d55307 647 // clear flags
AnnaBridge 167:e84263d55307 648 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
AnnaBridge 167:e84263d55307 649
AnnaBridge 167:e84263d55307 650 // reset states
AnnaBridge 167:e84263d55307 651 huart->TxXferCount = 0;
AnnaBridge 167:e84263d55307 652 // update handle state
AnnaBridge 167:e84263d55307 653 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
AnnaBridge 167:e84263d55307 654 huart->gState = HAL_UART_STATE_BUSY_RX;
AnnaBridge 167:e84263d55307 655 } else {
AnnaBridge 167:e84263d55307 656 huart->gState = HAL_UART_STATE_READY;
AnnaBridge 167:e84263d55307 657 }
AnnaBridge 167:e84263d55307 658 }
AnnaBridge 167:e84263d55307 659
AnnaBridge 167:e84263d55307 660 /**
AnnaBridge 167:e84263d55307 661 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
AnnaBridge 167:e84263d55307 662 * flush RX hardware buffer if RX FIFO is used
AnnaBridge 167:e84263d55307 663 *
AnnaBridge 167:e84263d55307 664 * @param obj The serial object
AnnaBridge 167:e84263d55307 665 */
AnnaBridge 167:e84263d55307 666 void serial_rx_abort_asynch(serial_t *obj)
AnnaBridge 167:e84263d55307 667 {
AnnaBridge 167:e84263d55307 668 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 669 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
AnnaBridge 167:e84263d55307 670
AnnaBridge 167:e84263d55307 671 // disable interrupts
AnnaBridge 167:e84263d55307 672 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
AnnaBridge 167:e84263d55307 673 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
AnnaBridge 167:e84263d55307 674 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
AnnaBridge 167:e84263d55307 675
AnnaBridge 167:e84263d55307 676 // clear flags
AnnaBridge 167:e84263d55307 677 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
AnnaBridge 177:d650f5d4c87a 678 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear errors flag
AnnaBridge 167:e84263d55307 679
AnnaBridge 167:e84263d55307 680 // reset states
AnnaBridge 167:e84263d55307 681 huart->RxXferCount = 0;
AnnaBridge 167:e84263d55307 682 // update handle state
AnnaBridge 167:e84263d55307 683 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
AnnaBridge 167:e84263d55307 684 huart->RxState = HAL_UART_STATE_BUSY_TX;
AnnaBridge 167:e84263d55307 685 } else {
AnnaBridge 167:e84263d55307 686 huart->RxState = HAL_UART_STATE_READY;
AnnaBridge 167:e84263d55307 687 }
AnnaBridge 167:e84263d55307 688 }
AnnaBridge 167:e84263d55307 689
AnnaBridge 167:e84263d55307 690 #endif
AnnaBridge 167:e84263d55307 691
AnnaBridge 167:e84263d55307 692 #if DEVICE_SERIAL_FC
AnnaBridge 167:e84263d55307 693
AnnaBridge 167:e84263d55307 694 /**
AnnaBridge 167:e84263d55307 695 * Set HW Control Flow
AnnaBridge 167:e84263d55307 696 * @param obj The serial object
AnnaBridge 167:e84263d55307 697 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
AnnaBridge 167:e84263d55307 698 * @param rxflow Pin for the rxflow
AnnaBridge 167:e84263d55307 699 * @param txflow Pin for the txflow
AnnaBridge 167:e84263d55307 700 */
AnnaBridge 167:e84263d55307 701 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
AnnaBridge 167:e84263d55307 702 {
AnnaBridge 167:e84263d55307 703 struct serial_s *obj_s = SERIAL_S(obj);
AnnaBridge 167:e84263d55307 704
AnnaBridge 167:e84263d55307 705 // Determine the UART to use (UART_1, UART_2, ...)
AnnaBridge 167:e84263d55307 706 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
AnnaBridge 167:e84263d55307 707 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
AnnaBridge 167:e84263d55307 708
AnnaBridge 167:e84263d55307 709 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
AnnaBridge 167:e84263d55307 710 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
AnnaBridge 167:e84263d55307 711 MBED_ASSERT(obj_s->uart != (UARTName)NC);
AnnaBridge 167:e84263d55307 712
AnnaBridge 167:e84263d55307 713 if(type == FlowControlNone) {
AnnaBridge 167:e84263d55307 714 // Disable hardware flow control
AnnaBridge 167:e84263d55307 715 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
AnnaBridge 167:e84263d55307 716 }
AnnaBridge 167:e84263d55307 717 if (type == FlowControlRTS) {
AnnaBridge 167:e84263d55307 718 // Enable RTS
AnnaBridge 167:e84263d55307 719 MBED_ASSERT(uart_rts != (UARTName)NC);
AnnaBridge 167:e84263d55307 720 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
AnnaBridge 167:e84263d55307 721 obj_s->pin_rts = rxflow;
AnnaBridge 167:e84263d55307 722 // Enable the pin for RTS function
AnnaBridge 167:e84263d55307 723 pinmap_pinout(rxflow, PinMap_UART_RTS);
AnnaBridge 167:e84263d55307 724 }
AnnaBridge 167:e84263d55307 725 if (type == FlowControlCTS) {
AnnaBridge 167:e84263d55307 726 // Enable CTS
AnnaBridge 167:e84263d55307 727 MBED_ASSERT(uart_cts != (UARTName)NC);
AnnaBridge 167:e84263d55307 728 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
AnnaBridge 167:e84263d55307 729 obj_s->pin_cts = txflow;
AnnaBridge 167:e84263d55307 730 // Enable the pin for CTS function
AnnaBridge 167:e84263d55307 731 pinmap_pinout(txflow, PinMap_UART_CTS);
AnnaBridge 167:e84263d55307 732 }
AnnaBridge 167:e84263d55307 733 if (type == FlowControlRTSCTS) {
AnnaBridge 167:e84263d55307 734 // Enable CTS & RTS
AnnaBridge 167:e84263d55307 735 MBED_ASSERT(uart_rts != (UARTName)NC);
AnnaBridge 167:e84263d55307 736 MBED_ASSERT(uart_cts != (UARTName)NC);
AnnaBridge 167:e84263d55307 737 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
AnnaBridge 167:e84263d55307 738 obj_s->pin_rts = rxflow;
AnnaBridge 167:e84263d55307 739 obj_s->pin_cts = txflow;
AnnaBridge 167:e84263d55307 740 // Enable the pin for CTS function
AnnaBridge 167:e84263d55307 741 pinmap_pinout(txflow, PinMap_UART_CTS);
AnnaBridge 167:e84263d55307 742 // Enable the pin for RTS function
AnnaBridge 167:e84263d55307 743 pinmap_pinout(rxflow, PinMap_UART_RTS);
AnnaBridge 167:e84263d55307 744 }
AnnaBridge 167:e84263d55307 745
AnnaBridge 167:e84263d55307 746 init_uart(obj);
AnnaBridge 167:e84263d55307 747 }
AnnaBridge 167:e84263d55307 748
AnnaBridge 167:e84263d55307 749 #endif
AnnaBridge 167:e84263d55307 750
AnnaBridge 167:e84263d55307 751 #endif