EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_STM/TARGET_STM32F1/serial_device.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 *******************************************************************************
be_bryan 0:b74591d5ab33 3 * Copyright (c) 2014, STMicroelectronics
be_bryan 0:b74591d5ab33 4 * All rights reserved.
be_bryan 0:b74591d5ab33 5 *
be_bryan 0:b74591d5ab33 6 * Redistribution and use in source and binary forms, with or without
be_bryan 0:b74591d5ab33 7 * modification, are permitted provided that the following conditions are met:
be_bryan 0:b74591d5ab33 8 *
be_bryan 0:b74591d5ab33 9 * 1. Redistributions of source code must retain the above copyright notice,
be_bryan 0:b74591d5ab33 10 * this list of conditions and the following disclaimer.
be_bryan 0:b74591d5ab33 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
be_bryan 0:b74591d5ab33 12 * this list of conditions and the following disclaimer in the documentation
be_bryan 0:b74591d5ab33 13 * and/or other materials provided with the distribution.
be_bryan 0:b74591d5ab33 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
be_bryan 0:b74591d5ab33 15 * may be used to endorse or promote products derived from this software
be_bryan 0:b74591d5ab33 16 * without specific prior written permission.
be_bryan 0:b74591d5ab33 17 *
be_bryan 0:b74591d5ab33 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
be_bryan 0:b74591d5ab33 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
be_bryan 0:b74591d5ab33 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
be_bryan 0:b74591d5ab33 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
be_bryan 0:b74591d5ab33 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
be_bryan 0:b74591d5ab33 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
be_bryan 0:b74591d5ab33 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
be_bryan 0:b74591d5ab33 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
be_bryan 0:b74591d5ab33 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
be_bryan 0:b74591d5ab33 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
be_bryan 0:b74591d5ab33 28 *******************************************************************************
be_bryan 0:b74591d5ab33 29 */
be_bryan 0:b74591d5ab33 30 #include "mbed_assert.h"
be_bryan 0:b74591d5ab33 31 #include "serial_api.h"
be_bryan 0:b74591d5ab33 32 #include "serial_api_hal.h"
be_bryan 0:b74591d5ab33 33
be_bryan 0:b74591d5ab33 34 #if DEVICE_SERIAL
be_bryan 0:b74591d5ab33 35
be_bryan 0:b74591d5ab33 36 #include "cmsis.h"
be_bryan 0:b74591d5ab33 37 #include "pinmap.h"
be_bryan 0:b74591d5ab33 38 #include "mbed_error.h"
be_bryan 0:b74591d5ab33 39 #include <string.h>
be_bryan 0:b74591d5ab33 40 #include "PeripheralPins.h"
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 #define UART_NUM (3)
be_bryan 0:b74591d5ab33 43
be_bryan 0:b74591d5ab33 44 static uint32_t serial_irq_ids[UART_NUM] = {0};
be_bryan 0:b74591d5ab33 45 UART_HandleTypeDef uart_handlers[UART_NUM];
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 static uart_irq_handler irq_handler;
be_bryan 0:b74591d5ab33 48
be_bryan 0:b74591d5ab33 49 int stdio_uart_inited = 0;
be_bryan 0:b74591d5ab33 50 serial_t stdio_uart;
be_bryan 0:b74591d5ab33 51
be_bryan 0:b74591d5ab33 52 void serial_init(serial_t *obj, PinName tx, PinName rx)
be_bryan 0:b74591d5ab33 53 {
be_bryan 0:b74591d5ab33 54 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 55
be_bryan 0:b74591d5ab33 56 // Determine the UART to use (UART_1, UART_2, ...)
be_bryan 0:b74591d5ab33 57 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
be_bryan 0:b74591d5ab33 58 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
be_bryan 0:b74591d5ab33 59
be_bryan 0:b74591d5ab33 60 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
be_bryan 0:b74591d5ab33 61 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
be_bryan 0:b74591d5ab33 62 MBED_ASSERT(obj_s->uart != (UARTName)NC);
be_bryan 0:b74591d5ab33 63
be_bryan 0:b74591d5ab33 64 // Enable USART clock
be_bryan 0:b74591d5ab33 65 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 66 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 67 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 68 __HAL_RCC_USART1_CLK_ENABLE();
be_bryan 0:b74591d5ab33 69 obj_s->index = 0;
be_bryan 0:b74591d5ab33 70 }
be_bryan 0:b74591d5ab33 71 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 72 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 73 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 74 __HAL_RCC_USART2_CLK_ENABLE();
be_bryan 0:b74591d5ab33 75 obj_s->index = 1;
be_bryan 0:b74591d5ab33 76 }
be_bryan 0:b74591d5ab33 77 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 78 __HAL_RCC_USART3_FORCE_RESET();
be_bryan 0:b74591d5ab33 79 __HAL_RCC_USART3_RELEASE_RESET();
be_bryan 0:b74591d5ab33 80 __HAL_RCC_USART3_CLK_ENABLE();
be_bryan 0:b74591d5ab33 81 obj_s->index = 2;
be_bryan 0:b74591d5ab33 82 }
be_bryan 0:b74591d5ab33 83
be_bryan 0:b74591d5ab33 84 // Configure UART pins
be_bryan 0:b74591d5ab33 85 pinmap_pinout(tx, PinMap_UART_TX);
be_bryan 0:b74591d5ab33 86 pinmap_pinout(rx, PinMap_UART_RX);
be_bryan 0:b74591d5ab33 87
be_bryan 0:b74591d5ab33 88 if (tx != NC) {
be_bryan 0:b74591d5ab33 89 pin_mode(tx, PullUp);
be_bryan 0:b74591d5ab33 90 }
be_bryan 0:b74591d5ab33 91 if (rx != NC) {
be_bryan 0:b74591d5ab33 92 pin_mode(rx, PullUp);
be_bryan 0:b74591d5ab33 93 }
be_bryan 0:b74591d5ab33 94
be_bryan 0:b74591d5ab33 95 // Configure UART
be_bryan 0:b74591d5ab33 96 obj_s->baudrate = 9600;
be_bryan 0:b74591d5ab33 97 obj_s->databits = UART_WORDLENGTH_8B;
be_bryan 0:b74591d5ab33 98 obj_s->stopbits = UART_STOPBITS_1;
be_bryan 0:b74591d5ab33 99 obj_s->parity = UART_PARITY_NONE;
be_bryan 0:b74591d5ab33 100
be_bryan 0:b74591d5ab33 101 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 102 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 103 #endif
be_bryan 0:b74591d5ab33 104
be_bryan 0:b74591d5ab33 105 obj_s->pin_tx = tx;
be_bryan 0:b74591d5ab33 106 obj_s->pin_rx = rx;
be_bryan 0:b74591d5ab33 107
be_bryan 0:b74591d5ab33 108 init_uart(obj);
be_bryan 0:b74591d5ab33 109
be_bryan 0:b74591d5ab33 110 // For stdio management
be_bryan 0:b74591d5ab33 111 if (obj_s->uart == STDIO_UART) {
be_bryan 0:b74591d5ab33 112 stdio_uart_inited = 1;
be_bryan 0:b74591d5ab33 113 memcpy(&stdio_uart, obj, sizeof(serial_t));
be_bryan 0:b74591d5ab33 114 }
be_bryan 0:b74591d5ab33 115 }
be_bryan 0:b74591d5ab33 116
be_bryan 0:b74591d5ab33 117 void serial_free(serial_t *obj)
be_bryan 0:b74591d5ab33 118 {
be_bryan 0:b74591d5ab33 119 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 120
be_bryan 0:b74591d5ab33 121 // Reset UART and disable clock
be_bryan 0:b74591d5ab33 122 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 123 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 124 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 125 __HAL_RCC_USART1_CLK_DISABLE();
be_bryan 0:b74591d5ab33 126 }
be_bryan 0:b74591d5ab33 127 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 128 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 129 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 130 __HAL_RCC_USART2_CLK_DISABLE();
be_bryan 0:b74591d5ab33 131 }
be_bryan 0:b74591d5ab33 132 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 133 __HAL_RCC_USART3_FORCE_RESET();
be_bryan 0:b74591d5ab33 134 __HAL_RCC_USART3_RELEASE_RESET();
be_bryan 0:b74591d5ab33 135 __HAL_RCC_USART3_CLK_DISABLE();
be_bryan 0:b74591d5ab33 136 }
be_bryan 0:b74591d5ab33 137
be_bryan 0:b74591d5ab33 138 // Configure GPIOs
be_bryan 0:b74591d5ab33 139 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 140 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 141
be_bryan 0:b74591d5ab33 142 serial_irq_ids[obj_s->index] = 0;
be_bryan 0:b74591d5ab33 143 }
be_bryan 0:b74591d5ab33 144
be_bryan 0:b74591d5ab33 145 void serial_baud(serial_t *obj, int baudrate)
be_bryan 0:b74591d5ab33 146 {
be_bryan 0:b74591d5ab33 147 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 148
be_bryan 0:b74591d5ab33 149 obj_s->baudrate = baudrate;
be_bryan 0:b74591d5ab33 150 init_uart(obj);
be_bryan 0:b74591d5ab33 151 }
be_bryan 0:b74591d5ab33 152
be_bryan 0:b74591d5ab33 153 /******************************************************************************
be_bryan 0:b74591d5ab33 154 * INTERRUPTS HANDLING
be_bryan 0:b74591d5ab33 155 ******************************************************************************/
be_bryan 0:b74591d5ab33 156
be_bryan 0:b74591d5ab33 157 static void uart_irq(int id)
be_bryan 0:b74591d5ab33 158 {
be_bryan 0:b74591d5ab33 159 UART_HandleTypeDef * huart = &uart_handlers[id];
be_bryan 0:b74591d5ab33 160
be_bryan 0:b74591d5ab33 161 if (serial_irq_ids[id] != 0) {
be_bryan 0:b74591d5ab33 162 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) {
be_bryan 0:b74591d5ab33 163 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TXE) != RESET) {
be_bryan 0:b74591d5ab33 164 irq_handler(serial_irq_ids[id], TxIrq);
be_bryan 0:b74591d5ab33 165 }
be_bryan 0:b74591d5ab33 166 }
be_bryan 0:b74591d5ab33 167 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 168 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 169 irq_handler(serial_irq_ids[id], RxIrq);
be_bryan 0:b74591d5ab33 170 /* Flag has been cleared when reading the content */
be_bryan 0:b74591d5ab33 171 }
be_bryan 0:b74591d5ab33 172 }
be_bryan 0:b74591d5ab33 173 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 174 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
be_bryan 0:b74591d5ab33 175 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear ORE flag
be_bryan 0:b74591d5ab33 176 }
be_bryan 0:b74591d5ab33 177 }
be_bryan 0:b74591d5ab33 178 }
be_bryan 0:b74591d5ab33 179 }
be_bryan 0:b74591d5ab33 180
be_bryan 0:b74591d5ab33 181 static void uart1_irq(void)
be_bryan 0:b74591d5ab33 182 {
be_bryan 0:b74591d5ab33 183 uart_irq(0);
be_bryan 0:b74591d5ab33 184 }
be_bryan 0:b74591d5ab33 185
be_bryan 0:b74591d5ab33 186 static void uart2_irq(void)
be_bryan 0:b74591d5ab33 187 {
be_bryan 0:b74591d5ab33 188 uart_irq(1);
be_bryan 0:b74591d5ab33 189 }
be_bryan 0:b74591d5ab33 190
be_bryan 0:b74591d5ab33 191 static void uart3_irq(void)
be_bryan 0:b74591d5ab33 192 {
be_bryan 0:b74591d5ab33 193 uart_irq(2);
be_bryan 0:b74591d5ab33 194 }
be_bryan 0:b74591d5ab33 195
be_bryan 0:b74591d5ab33 196 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
be_bryan 0:b74591d5ab33 197 {
be_bryan 0:b74591d5ab33 198 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 199
be_bryan 0:b74591d5ab33 200 irq_handler = handler;
be_bryan 0:b74591d5ab33 201 serial_irq_ids[obj_s->index] = id;
be_bryan 0:b74591d5ab33 202 }
be_bryan 0:b74591d5ab33 203
be_bryan 0:b74591d5ab33 204 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
be_bryan 0:b74591d5ab33 205 {
be_bryan 0:b74591d5ab33 206 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 207 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 208 IRQn_Type irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 209 uint32_t vector = 0;
be_bryan 0:b74591d5ab33 210
be_bryan 0:b74591d5ab33 211 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 212 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 213 vector = (uint32_t)&uart1_irq;
be_bryan 0:b74591d5ab33 214 }
be_bryan 0:b74591d5ab33 215
be_bryan 0:b74591d5ab33 216 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 217 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 218 vector = (uint32_t)&uart2_irq;
be_bryan 0:b74591d5ab33 219 }
be_bryan 0:b74591d5ab33 220
be_bryan 0:b74591d5ab33 221 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 222 irq_n = USART3_IRQn;
be_bryan 0:b74591d5ab33 223 vector = (uint32_t)&uart3_irq;
be_bryan 0:b74591d5ab33 224 }
be_bryan 0:b74591d5ab33 225
be_bryan 0:b74591d5ab33 226 if (enable) {
be_bryan 0:b74591d5ab33 227 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 228 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 229 } else { // TxIrq
be_bryan 0:b74591d5ab33 230 __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 231 }
be_bryan 0:b74591d5ab33 232 NVIC_SetVector(irq_n, vector);
be_bryan 0:b74591d5ab33 233 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 234
be_bryan 0:b74591d5ab33 235 } else { // disable
be_bryan 0:b74591d5ab33 236 int all_disabled = 0;
be_bryan 0:b74591d5ab33 237 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 238 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 239 // Check if TxIrq is disabled too
be_bryan 0:b74591d5ab33 240 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
be_bryan 0:b74591d5ab33 241 all_disabled = 1;
be_bryan 0:b74591d5ab33 242 }
be_bryan 0:b74591d5ab33 243 } else { // TxIrq
be_bryan 0:b74591d5ab33 244 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 245 // Check if RxIrq is disabled too
be_bryan 0:b74591d5ab33 246 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
be_bryan 0:b74591d5ab33 247 all_disabled = 1;
be_bryan 0:b74591d5ab33 248 }
be_bryan 0:b74591d5ab33 249 }
be_bryan 0:b74591d5ab33 250
be_bryan 0:b74591d5ab33 251 if (all_disabled) {
be_bryan 0:b74591d5ab33 252 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 253 }
be_bryan 0:b74591d5ab33 254 }
be_bryan 0:b74591d5ab33 255 }
be_bryan 0:b74591d5ab33 256
be_bryan 0:b74591d5ab33 257 /******************************************************************************
be_bryan 0:b74591d5ab33 258 * READ/WRITE
be_bryan 0:b74591d5ab33 259 ******************************************************************************/
be_bryan 0:b74591d5ab33 260
be_bryan 0:b74591d5ab33 261 int serial_getc(serial_t *obj)
be_bryan 0:b74591d5ab33 262 {
be_bryan 0:b74591d5ab33 263 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 264 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 265
be_bryan 0:b74591d5ab33 266 while (!serial_readable(obj));
be_bryan 0:b74591d5ab33 267 if (obj_s->databits == UART_WORDLENGTH_8B) {
be_bryan 0:b74591d5ab33 268 return (int)(huart->Instance->DR & (uint8_t)0xFF);
be_bryan 0:b74591d5ab33 269 } else {
be_bryan 0:b74591d5ab33 270 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
be_bryan 0:b74591d5ab33 271 }
be_bryan 0:b74591d5ab33 272 }
be_bryan 0:b74591d5ab33 273
be_bryan 0:b74591d5ab33 274 void serial_putc(serial_t *obj, int c)
be_bryan 0:b74591d5ab33 275 {
be_bryan 0:b74591d5ab33 276 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 277 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 278
be_bryan 0:b74591d5ab33 279 while (!serial_writable(obj));
be_bryan 0:b74591d5ab33 280 if (obj_s->databits == UART_WORDLENGTH_8B) {
be_bryan 0:b74591d5ab33 281 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
be_bryan 0:b74591d5ab33 282 } else {
be_bryan 0:b74591d5ab33 283 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
be_bryan 0:b74591d5ab33 284 }
be_bryan 0:b74591d5ab33 285 }
be_bryan 0:b74591d5ab33 286
be_bryan 0:b74591d5ab33 287 void serial_clear(serial_t *obj)
be_bryan 0:b74591d5ab33 288 {
be_bryan 0:b74591d5ab33 289 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 290 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 291
be_bryan 0:b74591d5ab33 292 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 293 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 294 }
be_bryan 0:b74591d5ab33 295
be_bryan 0:b74591d5ab33 296 void serial_break_set(serial_t *obj)
be_bryan 0:b74591d5ab33 297 {
be_bryan 0:b74591d5ab33 298 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 299 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 300
be_bryan 0:b74591d5ab33 301 HAL_LIN_SendBreak(huart);
be_bryan 0:b74591d5ab33 302 }
be_bryan 0:b74591d5ab33 303
be_bryan 0:b74591d5ab33 304 #if DEVICE_SERIAL_ASYNCH
be_bryan 0:b74591d5ab33 305
be_bryan 0:b74591d5ab33 306 /******************************************************************************
be_bryan 0:b74591d5ab33 307 * LOCAL HELPER FUNCTIONS
be_bryan 0:b74591d5ab33 308 ******************************************************************************/
be_bryan 0:b74591d5ab33 309
be_bryan 0:b74591d5ab33 310 /**
be_bryan 0:b74591d5ab33 311 * Configure the TX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 312 *
be_bryan 0:b74591d5ab33 313 * @param obj The serial object.
be_bryan 0:b74591d5ab33 314 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 315 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 316 */
be_bryan 0:b74591d5ab33 317 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
be_bryan 0:b74591d5ab33 318 {
be_bryan 0:b74591d5ab33 319 (void)width;
be_bryan 0:b74591d5ab33 320
be_bryan 0:b74591d5ab33 321 // Exit if a transmit is already on-going
be_bryan 0:b74591d5ab33 322 if (serial_tx_active(obj)) {
be_bryan 0:b74591d5ab33 323 return;
be_bryan 0:b74591d5ab33 324 }
be_bryan 0:b74591d5ab33 325
be_bryan 0:b74591d5ab33 326 obj->tx_buff.buffer = tx;
be_bryan 0:b74591d5ab33 327 obj->tx_buff.length = tx_length;
be_bryan 0:b74591d5ab33 328 obj->tx_buff.pos = 0;
be_bryan 0:b74591d5ab33 329 }
be_bryan 0:b74591d5ab33 330
be_bryan 0:b74591d5ab33 331 /**
be_bryan 0:b74591d5ab33 332 * Configure the RX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 333 *
be_bryan 0:b74591d5ab33 334 * @param obj The serial object.
be_bryan 0:b74591d5ab33 335 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 336 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 337 */
be_bryan 0:b74591d5ab33 338 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
be_bryan 0:b74591d5ab33 339 {
be_bryan 0:b74591d5ab33 340 (void)width;
be_bryan 0:b74591d5ab33 341
be_bryan 0:b74591d5ab33 342 // Exit if a reception is already on-going
be_bryan 0:b74591d5ab33 343 if (serial_rx_active(obj)) {
be_bryan 0:b74591d5ab33 344 return;
be_bryan 0:b74591d5ab33 345 }
be_bryan 0:b74591d5ab33 346
be_bryan 0:b74591d5ab33 347 obj->rx_buff.buffer = rx;
be_bryan 0:b74591d5ab33 348 obj->rx_buff.length = rx_length;
be_bryan 0:b74591d5ab33 349 obj->rx_buff.pos = 0;
be_bryan 0:b74591d5ab33 350 }
be_bryan 0:b74591d5ab33 351
be_bryan 0:b74591d5ab33 352 /**
be_bryan 0:b74591d5ab33 353 * Configure events
be_bryan 0:b74591d5ab33 354 *
be_bryan 0:b74591d5ab33 355 * @param obj The serial object
be_bryan 0:b74591d5ab33 356 * @param event The logical OR of the events to configure
be_bryan 0:b74591d5ab33 357 * @param enable Set to non-zero to enable events, or zero to disable them
be_bryan 0:b74591d5ab33 358 */
be_bryan 0:b74591d5ab33 359 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
be_bryan 0:b74591d5ab33 360 {
be_bryan 0:b74591d5ab33 361 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 362
be_bryan 0:b74591d5ab33 363 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
be_bryan 0:b74591d5ab33 364 if (enable) {
be_bryan 0:b74591d5ab33 365 obj_s->events |= event;
be_bryan 0:b74591d5ab33 366 } else {
be_bryan 0:b74591d5ab33 367 obj_s->events &= ~event;
be_bryan 0:b74591d5ab33 368 }
be_bryan 0:b74591d5ab33 369 }
be_bryan 0:b74591d5ab33 370
be_bryan 0:b74591d5ab33 371
be_bryan 0:b74591d5ab33 372 /**
be_bryan 0:b74591d5ab33 373 * Get index of serial object TX IRQ, relating it to the physical peripheral.
be_bryan 0:b74591d5ab33 374 *
be_bryan 0:b74591d5ab33 375 * @param obj pointer to serial object
be_bryan 0:b74591d5ab33 376 * @return internal NVIC TX IRQ index of U(S)ART peripheral
be_bryan 0:b74591d5ab33 377 */
be_bryan 0:b74591d5ab33 378 static IRQn_Type serial_get_irq_n(serial_t *obj)
be_bryan 0:b74591d5ab33 379 {
be_bryan 0:b74591d5ab33 380 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 381 IRQn_Type irq_n;
be_bryan 0:b74591d5ab33 382
be_bryan 0:b74591d5ab33 383 switch (obj_s->index) {
be_bryan 0:b74591d5ab33 384 case 0:
be_bryan 0:b74591d5ab33 385 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 386 break;
be_bryan 0:b74591d5ab33 387
be_bryan 0:b74591d5ab33 388 case 1:
be_bryan 0:b74591d5ab33 389 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 390 break;
be_bryan 0:b74591d5ab33 391
be_bryan 0:b74591d5ab33 392 case 2:
be_bryan 0:b74591d5ab33 393 irq_n = USART3_IRQn;
be_bryan 0:b74591d5ab33 394 break;
be_bryan 0:b74591d5ab33 395
be_bryan 0:b74591d5ab33 396 default:
be_bryan 0:b74591d5ab33 397 irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 398 }
be_bryan 0:b74591d5ab33 399
be_bryan 0:b74591d5ab33 400 return irq_n;
be_bryan 0:b74591d5ab33 401 }
be_bryan 0:b74591d5ab33 402
be_bryan 0:b74591d5ab33 403 /******************************************************************************
be_bryan 0:b74591d5ab33 404 * MBED API FUNCTIONS
be_bryan 0:b74591d5ab33 405 ******************************************************************************/
be_bryan 0:b74591d5ab33 406
be_bryan 0:b74591d5ab33 407 /**
be_bryan 0:b74591d5ab33 408 * Begin asynchronous TX transfer. The used buffer is specified in the serial
be_bryan 0:b74591d5ab33 409 * object, tx_buff
be_bryan 0:b74591d5ab33 410 *
be_bryan 0:b74591d5ab33 411 * @param obj The serial object
be_bryan 0:b74591d5ab33 412 * @param tx The buffer for sending
be_bryan 0:b74591d5ab33 413 * @param tx_length The number of words to transmit
be_bryan 0:b74591d5ab33 414 * @param tx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 415 * @param handler The serial handler
be_bryan 0:b74591d5ab33 416 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 417 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 418 * @return Returns number of data transfered, or 0 otherwise
be_bryan 0:b74591d5ab33 419 */
be_bryan 0:b74591d5ab33 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)
be_bryan 0:b74591d5ab33 421 {
be_bryan 0:b74591d5ab33 422 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 423 (void) hint;
be_bryan 0:b74591d5ab33 424
be_bryan 0:b74591d5ab33 425 // Check buffer is ok
be_bryan 0:b74591d5ab33 426 MBED_ASSERT(tx != (void*)0);
be_bryan 0:b74591d5ab33 427 MBED_ASSERT(tx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 428
be_bryan 0:b74591d5ab33 429 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 430 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 431
be_bryan 0:b74591d5ab33 432 if (tx_length == 0) {
be_bryan 0:b74591d5ab33 433 return 0;
be_bryan 0:b74591d5ab33 434 }
be_bryan 0:b74591d5ab33 435
be_bryan 0:b74591d5ab33 436 // Set up buffer
be_bryan 0:b74591d5ab33 437 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
be_bryan 0:b74591d5ab33 438
be_bryan 0:b74591d5ab33 439 // Set up events
be_bryan 0:b74591d5ab33 440 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
be_bryan 0:b74591d5ab33 441 serial_enable_event(obj, event, 1); // Set only the wanted events
be_bryan 0:b74591d5ab33 442
be_bryan 0:b74591d5ab33 443 // Enable interrupt
be_bryan 0:b74591d5ab33 444 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 445 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 446 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 447 NVIC_SetPriority(irq_n, 1);
be_bryan 0:b74591d5ab33 448 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 449 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 450
be_bryan 0:b74591d5ab33 451 // the following function will enable UART_IT_TXE and error interrupts
be_bryan 0:b74591d5ab33 452 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
be_bryan 0:b74591d5ab33 453 return 0;
be_bryan 0:b74591d5ab33 454 }
be_bryan 0:b74591d5ab33 455
be_bryan 0:b74591d5ab33 456 return tx_length;
be_bryan 0:b74591d5ab33 457 }
be_bryan 0:b74591d5ab33 458
be_bryan 0:b74591d5ab33 459 /**
be_bryan 0:b74591d5ab33 460 * Begin asynchronous RX transfer (enable interrupt for data collecting)
be_bryan 0:b74591d5ab33 461 * The used buffer is specified in the serial object, rx_buff
be_bryan 0:b74591d5ab33 462 *
be_bryan 0:b74591d5ab33 463 * @param obj The serial object
be_bryan 0:b74591d5ab33 464 * @param rx The buffer for sending
be_bryan 0:b74591d5ab33 465 * @param rx_length The number of words to transmit
be_bryan 0:b74591d5ab33 466 * @param rx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 467 * @param handler The serial handler
be_bryan 0:b74591d5ab33 468 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 469 * @param handler The serial handler
be_bryan 0:b74591d5ab33 470 * @param char_match A character in range 0-254 to be matched
be_bryan 0:b74591d5ab33 471 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 472 */
be_bryan 0:b74591d5ab33 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)
be_bryan 0:b74591d5ab33 474 {
be_bryan 0:b74591d5ab33 475 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 476 (void) hint;
be_bryan 0:b74591d5ab33 477
be_bryan 0:b74591d5ab33 478 /* Sanity check arguments */
be_bryan 0:b74591d5ab33 479 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 480 MBED_ASSERT(rx != (void*)0);
be_bryan 0:b74591d5ab33 481 MBED_ASSERT(rx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 482
be_bryan 0:b74591d5ab33 483 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 484 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 485
be_bryan 0:b74591d5ab33 486 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
be_bryan 0:b74591d5ab33 487 serial_enable_event(obj, event, 1);
be_bryan 0:b74591d5ab33 488
be_bryan 0:b74591d5ab33 489 // set CharMatch
be_bryan 0:b74591d5ab33 490 obj->char_match = char_match;
be_bryan 0:b74591d5ab33 491
be_bryan 0:b74591d5ab33 492 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
be_bryan 0:b74591d5ab33 493
be_bryan 0:b74591d5ab33 494 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 495 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 496 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 497 NVIC_SetPriority(irq_n, 0);
be_bryan 0:b74591d5ab33 498 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 499 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 500
be_bryan 0:b74591d5ab33 501 // following HAL function will enable the RXNE interrupt + error interrupts
be_bryan 0:b74591d5ab33 502 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
be_bryan 0:b74591d5ab33 503 }
be_bryan 0:b74591d5ab33 504
be_bryan 0:b74591d5ab33 505 /**
be_bryan 0:b74591d5ab33 506 * Attempts to determine if the serial peripheral is already in use for TX
be_bryan 0:b74591d5ab33 507 *
be_bryan 0:b74591d5ab33 508 * @param obj The serial object
be_bryan 0:b74591d5ab33 509 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 510 */
be_bryan 0:b74591d5ab33 511 uint8_t serial_tx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 512 {
be_bryan 0:b74591d5ab33 513 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 514
be_bryan 0:b74591d5ab33 515 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 516 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 517
be_bryan 0:b74591d5ab33 518 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
be_bryan 0:b74591d5ab33 519 }
be_bryan 0:b74591d5ab33 520
be_bryan 0:b74591d5ab33 521 /**
be_bryan 0:b74591d5ab33 522 * Attempts to determine if the serial peripheral is already in use for RX
be_bryan 0:b74591d5ab33 523 *
be_bryan 0:b74591d5ab33 524 * @param obj The serial object
be_bryan 0:b74591d5ab33 525 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 526 */
be_bryan 0:b74591d5ab33 527 uint8_t serial_rx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 528 {
be_bryan 0:b74591d5ab33 529 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 530
be_bryan 0:b74591d5ab33 531 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 532 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 533
be_bryan 0:b74591d5ab33 534 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
be_bryan 0:b74591d5ab33 535 }
be_bryan 0:b74591d5ab33 536
be_bryan 0:b74591d5ab33 537 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
be_bryan 0:b74591d5ab33 538 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 539 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
be_bryan 0:b74591d5ab33 540 }
be_bryan 0:b74591d5ab33 541 }
be_bryan 0:b74591d5ab33 542
be_bryan 0:b74591d5ab33 543 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
be_bryan 0:b74591d5ab33 544 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
be_bryan 0:b74591d5ab33 545 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear PE flag
be_bryan 0:b74591d5ab33 546 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
be_bryan 0:b74591d5ab33 547 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear FE flag
be_bryan 0:b74591d5ab33 548 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
be_bryan 0:b74591d5ab33 549 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear NE flag
be_bryan 0:b74591d5ab33 550 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 551 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear ORE flag
be_bryan 0:b74591d5ab33 552 }
be_bryan 0:b74591d5ab33 553 }
be_bryan 0:b74591d5ab33 554
be_bryan 0:b74591d5ab33 555 /**
be_bryan 0:b74591d5ab33 556 * The asynchronous TX and RX handler.
be_bryan 0:b74591d5ab33 557 *
be_bryan 0:b74591d5ab33 558 * @param obj The serial object
be_bryan 0:b74591d5ab33 559 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
be_bryan 0:b74591d5ab33 560 */
be_bryan 0:b74591d5ab33 561 int serial_irq_handler_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 562 {
be_bryan 0:b74591d5ab33 563 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 564 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 565
be_bryan 0:b74591d5ab33 566 volatile int return_event = 0;
be_bryan 0:b74591d5ab33 567 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
be_bryan 0:b74591d5ab33 568 uint8_t i = 0;
be_bryan 0:b74591d5ab33 569
be_bryan 0:b74591d5ab33 570 // TX PART:
be_bryan 0:b74591d5ab33 571 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 572 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
be_bryan 0:b74591d5ab33 573 // Return event SERIAL_EVENT_TX_COMPLETE if requested
be_bryan 0:b74591d5ab33 574 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
be_bryan 0:b74591d5ab33 575 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 576 }
be_bryan 0:b74591d5ab33 577 }
be_bryan 0:b74591d5ab33 578 }
be_bryan 0:b74591d5ab33 579
be_bryan 0:b74591d5ab33 580 // Handle error events
be_bryan 0:b74591d5ab33 581 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
be_bryan 0:b74591d5ab33 582 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
be_bryan 0:b74591d5ab33 583 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 584 }
be_bryan 0:b74591d5ab33 585 }
be_bryan 0:b74591d5ab33 586
be_bryan 0:b74591d5ab33 587 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
be_bryan 0:b74591d5ab33 588 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
be_bryan 0:b74591d5ab33 589 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 590 }
be_bryan 0:b74591d5ab33 591 }
be_bryan 0:b74591d5ab33 592
be_bryan 0:b74591d5ab33 593 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 594 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
be_bryan 0:b74591d5ab33 595 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 596 }
be_bryan 0:b74591d5ab33 597 }
be_bryan 0:b74591d5ab33 598
be_bryan 0:b74591d5ab33 599 HAL_UART_IRQHandler(huart);
be_bryan 0:b74591d5ab33 600
be_bryan 0:b74591d5ab33 601 // Abort if an error occurs
be_bryan 0:b74591d5ab33 602 if ((return_event & SERIAL_EVENT_RX_PARITY_ERROR) ||
be_bryan 0:b74591d5ab33 603 (return_event & SERIAL_EVENT_RX_FRAMING_ERROR) ||
be_bryan 0:b74591d5ab33 604 (return_event & SERIAL_EVENT_RX_OVERRUN_ERROR)) {
be_bryan 0:b74591d5ab33 605 return return_event;
be_bryan 0:b74591d5ab33 606 }
be_bryan 0:b74591d5ab33 607
be_bryan 0:b74591d5ab33 608 //RX PART
be_bryan 0:b74591d5ab33 609 if (huart->RxXferSize != 0) {
be_bryan 0:b74591d5ab33 610 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
be_bryan 0:b74591d5ab33 611 }
be_bryan 0:b74591d5ab33 612 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
be_bryan 0:b74591d5ab33 613 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 614 }
be_bryan 0:b74591d5ab33 615
be_bryan 0:b74591d5ab33 616 // Check if char_match is present
be_bryan 0:b74591d5ab33 617 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
be_bryan 0:b74591d5ab33 618 if (buf != NULL) {
be_bryan 0:b74591d5ab33 619 for (i = 0; i < obj->rx_buff.pos; i++) {
be_bryan 0:b74591d5ab33 620 if (buf[i] == obj->char_match) {
be_bryan 0:b74591d5ab33 621 obj->rx_buff.pos = i;
be_bryan 0:b74591d5ab33 622 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
be_bryan 0:b74591d5ab33 623 serial_rx_abort_asynch(obj);
be_bryan 0:b74591d5ab33 624 break;
be_bryan 0:b74591d5ab33 625 }
be_bryan 0:b74591d5ab33 626 }
be_bryan 0:b74591d5ab33 627 }
be_bryan 0:b74591d5ab33 628 }
be_bryan 0:b74591d5ab33 629
be_bryan 0:b74591d5ab33 630 return return_event;
be_bryan 0:b74591d5ab33 631 }
be_bryan 0:b74591d5ab33 632
be_bryan 0:b74591d5ab33 633 /**
be_bryan 0:b74591d5ab33 634 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
be_bryan 0:b74591d5ab33 635 * flush TX hardware buffer if TX FIFO is used
be_bryan 0:b74591d5ab33 636 *
be_bryan 0:b74591d5ab33 637 * @param obj The serial object
be_bryan 0:b74591d5ab33 638 */
be_bryan 0:b74591d5ab33 639 void serial_tx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 640 {
be_bryan 0:b74591d5ab33 641 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 642 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 643
be_bryan 0:b74591d5ab33 644 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
be_bryan 0:b74591d5ab33 645 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 646
be_bryan 0:b74591d5ab33 647 // clear flags
be_bryan 0:b74591d5ab33 648 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
be_bryan 0:b74591d5ab33 649
be_bryan 0:b74591d5ab33 650 // reset states
be_bryan 0:b74591d5ab33 651 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 652 // update handle state
be_bryan 0:b74591d5ab33 653 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 654 huart->gState = HAL_UART_STATE_BUSY_RX;
be_bryan 0:b74591d5ab33 655 } else {
be_bryan 0:b74591d5ab33 656 huart->gState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 657 }
be_bryan 0:b74591d5ab33 658 }
be_bryan 0:b74591d5ab33 659
be_bryan 0:b74591d5ab33 660 /**
be_bryan 0:b74591d5ab33 661 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
be_bryan 0:b74591d5ab33 662 * flush RX hardware buffer if RX FIFO is used
be_bryan 0:b74591d5ab33 663 *
be_bryan 0:b74591d5ab33 664 * @param obj The serial object
be_bryan 0:b74591d5ab33 665 */
be_bryan 0:b74591d5ab33 666 void serial_rx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 667 {
be_bryan 0:b74591d5ab33 668 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 669 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 670
be_bryan 0:b74591d5ab33 671 // disable interrupts
be_bryan 0:b74591d5ab33 672 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 673 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
be_bryan 0:b74591d5ab33 674 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
be_bryan 0:b74591d5ab33 675
be_bryan 0:b74591d5ab33 676 // clear flags
be_bryan 0:b74591d5ab33 677 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
be_bryan 0:b74591d5ab33 678 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->DR; // Clear errors flag
be_bryan 0:b74591d5ab33 679
be_bryan 0:b74591d5ab33 680 // reset states
be_bryan 0:b74591d5ab33 681 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 682 // update handle state
be_bryan 0:b74591d5ab33 683 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 684 huart->RxState = HAL_UART_STATE_BUSY_TX;
be_bryan 0:b74591d5ab33 685 } else {
be_bryan 0:b74591d5ab33 686 huart->RxState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 687 }
be_bryan 0:b74591d5ab33 688 }
be_bryan 0:b74591d5ab33 689
be_bryan 0:b74591d5ab33 690 #endif
be_bryan 0:b74591d5ab33 691
be_bryan 0:b74591d5ab33 692 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 693
be_bryan 0:b74591d5ab33 694 /**
be_bryan 0:b74591d5ab33 695 * Set HW Control Flow
be_bryan 0:b74591d5ab33 696 * @param obj The serial object
be_bryan 0:b74591d5ab33 697 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
be_bryan 0:b74591d5ab33 698 * @param rxflow Pin for the rxflow
be_bryan 0:b74591d5ab33 699 * @param txflow Pin for the txflow
be_bryan 0:b74591d5ab33 700 */
be_bryan 0:b74591d5ab33 701 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
be_bryan 0:b74591d5ab33 702 {
be_bryan 0:b74591d5ab33 703 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 704
be_bryan 0:b74591d5ab33 705 // Determine the UART to use (UART_1, UART_2, ...)
be_bryan 0:b74591d5ab33 706 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 707 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 708
be_bryan 0:b74591d5ab33 709 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
be_bryan 0:b74591d5ab33 710 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
be_bryan 0:b74591d5ab33 711 MBED_ASSERT(obj_s->uart != (UARTName)NC);
be_bryan 0:b74591d5ab33 712
be_bryan 0:b74591d5ab33 713 if(type == FlowControlNone) {
be_bryan 0:b74591d5ab33 714 // Disable hardware flow control
be_bryan 0:b74591d5ab33 715 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 716 }
be_bryan 0:b74591d5ab33 717 if (type == FlowControlRTS) {
be_bryan 0:b74591d5ab33 718 // Enable RTS
be_bryan 0:b74591d5ab33 719 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 720 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
be_bryan 0:b74591d5ab33 721 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 722 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 723 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 724 }
be_bryan 0:b74591d5ab33 725 if (type == FlowControlCTS) {
be_bryan 0:b74591d5ab33 726 // Enable CTS
be_bryan 0:b74591d5ab33 727 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 728 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
be_bryan 0:b74591d5ab33 729 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 730 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 731 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 732 }
be_bryan 0:b74591d5ab33 733 if (type == FlowControlRTSCTS) {
be_bryan 0:b74591d5ab33 734 // Enable CTS & RTS
be_bryan 0:b74591d5ab33 735 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 736 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 737 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
be_bryan 0:b74591d5ab33 738 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 739 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 740 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 741 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 742 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 743 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 744 }
be_bryan 0:b74591d5ab33 745
be_bryan 0:b74591d5ab33 746 init_uart(obj);
be_bryan 0:b74591d5ab33 747 }
be_bryan 0:b74591d5ab33 748
be_bryan 0:b74591d5ab33 749 #endif
be_bryan 0:b74591d5ab33 750
be_bryan 0:b74591d5ab33 751 #endif