erkin yucel / mbed-os

mbed os with nrf51 internal bandgap enabled to read battery level

Dependents:   BLE_file_test BLE_Blink ExternalEncoder

targets/TARGET_STM/TARGET_STM32F1/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) 2014, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #include "mbed_assert.h"
elessair 0:f269e3021894 31 #include "serial_api.h"
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #if DEVICE_SERIAL
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 #include "cmsis.h"
elessair 0:f269e3021894 36 #include "pinmap.h"
elessair 0:f269e3021894 37 #include "mbed_error.h"
elessair 0:f269e3021894 38 #include <string.h>
elessair 0:f269e3021894 39 #include "PeripheralPins.h"
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 #define UART_NUM (3)
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 static uint32_t serial_irq_ids[UART_NUM] = {0};
elessair 0:f269e3021894 44 static UART_HandleTypeDef uart_handlers[UART_NUM];
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 static uart_irq_handler irq_handler;
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 int stdio_uart_inited = 0;
elessair 0:f269e3021894 49 serial_t stdio_uart;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 52 #define SERIAL_S(obj) (&((obj)->serial))
elessair 0:f269e3021894 53 #else
elessair 0:f269e3021894 54 #define SERIAL_S(obj) (obj)
elessair 0:f269e3021894 55 #endif
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 static void init_uart(serial_t *obj)
elessair 0:f269e3021894 58 {
elessair 0:f269e3021894 59 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 60 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 61 huart->Instance = (USART_TypeDef *)(obj_s->uart);
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 huart->Init.BaudRate = obj_s->baudrate;
elessair 0:f269e3021894 64 huart->Init.WordLength = obj_s->databits;
elessair 0:f269e3021894 65 huart->Init.StopBits = obj_s->stopbits;
elessair 0:f269e3021894 66 huart->Init.Parity = obj_s->parity;
elessair 0:f269e3021894 67 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 68 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
elessair 0:f269e3021894 69 #else
elessair 0:f269e3021894 70 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 71 #endif
elessair 0:f269e3021894 72 huart->TxXferCount = 0;
elessair 0:f269e3021894 73 huart->TxXferSize = 0;
elessair 0:f269e3021894 74 huart->RxXferCount = 0;
elessair 0:f269e3021894 75 huart->RxXferSize = 0;
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 if (obj_s->pin_rx == NC) {
elessair 0:f269e3021894 78 huart->Init.Mode = UART_MODE_TX;
elessair 0:f269e3021894 79 } else if (obj_s->pin_tx == NC) {
elessair 0:f269e3021894 80 huart->Init.Mode = UART_MODE_RX;
elessair 0:f269e3021894 81 } else {
elessair 0:f269e3021894 82 huart->Init.Mode = UART_MODE_TX_RX;
elessair 0:f269e3021894 83 }
elessair 0:f269e3021894 84
elessair 0:f269e3021894 85 if (HAL_UART_Init(huart) != HAL_OK) {
elessair 0:f269e3021894 86 error("Cannot initialize UART\n");
elessair 0:f269e3021894 87 }
elessair 0:f269e3021894 88 }
elessair 0:f269e3021894 89
elessair 0:f269e3021894 90 void serial_init(serial_t *obj, PinName tx, PinName rx)
elessair 0:f269e3021894 91 {
elessair 0:f269e3021894 92 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 93
elessair 0:f269e3021894 94 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 95 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
elessair 0:f269e3021894 96 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
elessair 0:f269e3021894 97
elessair 0:f269e3021894 98 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 99 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
elessair 0:f269e3021894 100 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 101
elessair 0:f269e3021894 102 // Enable USART clock
elessair 0:f269e3021894 103 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 104 __HAL_RCC_USART1_FORCE_RESET();
elessair 0:f269e3021894 105 __HAL_RCC_USART1_RELEASE_RESET();
elessair 0:f269e3021894 106 __HAL_RCC_USART1_CLK_ENABLE();
elessair 0:f269e3021894 107 obj_s->index = 0;
elessair 0:f269e3021894 108 }
elessair 0:f269e3021894 109 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 110 __HAL_RCC_USART2_FORCE_RESET();
elessair 0:f269e3021894 111 __HAL_RCC_USART2_RELEASE_RESET();
elessair 0:f269e3021894 112 __HAL_RCC_USART2_CLK_ENABLE();
elessair 0:f269e3021894 113 obj_s->index = 1;
elessair 0:f269e3021894 114 }
elessair 0:f269e3021894 115 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 116 __HAL_RCC_USART3_FORCE_RESET();
elessair 0:f269e3021894 117 __HAL_RCC_USART3_RELEASE_RESET();
elessair 0:f269e3021894 118 __HAL_RCC_USART3_CLK_ENABLE();
elessair 0:f269e3021894 119 obj_s->index = 2;
elessair 0:f269e3021894 120 }
elessair 0:f269e3021894 121
elessair 0:f269e3021894 122 // Configure UART pins
elessair 0:f269e3021894 123 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 124 pinmap_pinout(rx, PinMap_UART_RX);
elessair 0:f269e3021894 125
elessair 0:f269e3021894 126 if (tx != NC) {
elessair 0:f269e3021894 127 pin_mode(tx, PullUp);
elessair 0:f269e3021894 128 }
elessair 0:f269e3021894 129 if (rx != NC) {
elessair 0:f269e3021894 130 pin_mode(rx, PullUp);
elessair 0:f269e3021894 131 }
elessair 0:f269e3021894 132
elessair 0:f269e3021894 133 // Configure UART
elessair 0:f269e3021894 134 obj_s->baudrate = 9600;
elessair 0:f269e3021894 135 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 136 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 137 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 138
elessair 0:f269e3021894 139 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 140 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 141 #endif
elessair 0:f269e3021894 142
elessair 0:f269e3021894 143 obj_s->pin_tx = tx;
elessair 0:f269e3021894 144 obj_s->pin_rx = rx;
elessair 0:f269e3021894 145
elessair 0:f269e3021894 146 init_uart(obj);
elessair 0:f269e3021894 147
elessair 0:f269e3021894 148 // For stdio management
elessair 0:f269e3021894 149 if (obj_s->uart == STDIO_UART) {
elessair 0:f269e3021894 150 stdio_uart_inited = 1;
elessair 0:f269e3021894 151 memcpy(&stdio_uart, obj, sizeof(serial_t));
elessair 0:f269e3021894 152 }
elessair 0:f269e3021894 153 }
elessair 0:f269e3021894 154
elessair 0:f269e3021894 155 void serial_free(serial_t *obj)
elessair 0:f269e3021894 156 {
elessair 0:f269e3021894 157 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 158
elessair 0:f269e3021894 159 // Reset UART and disable clock
elessair 0:f269e3021894 160 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 161 __USART1_FORCE_RESET();
elessair 0:f269e3021894 162 __USART1_RELEASE_RESET();
elessair 0:f269e3021894 163 __USART1_CLK_DISABLE();
elessair 0:f269e3021894 164 }
elessair 0:f269e3021894 165 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 166 __USART2_FORCE_RESET();
elessair 0:f269e3021894 167 __USART2_RELEASE_RESET();
elessair 0:f269e3021894 168 __USART2_CLK_DISABLE();
elessair 0:f269e3021894 169 }
elessair 0:f269e3021894 170 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 171 __USART3_FORCE_RESET();
elessair 0:f269e3021894 172 __USART3_RELEASE_RESET();
elessair 0:f269e3021894 173 __USART3_CLK_DISABLE();
elessair 0:f269e3021894 174 }
elessair 0:f269e3021894 175
elessair 0:f269e3021894 176 // Configure GPIOs
elessair 0:f269e3021894 177 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 178 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 179
elessair 0:f269e3021894 180 serial_irq_ids[obj_s->index] = 0;
elessair 0:f269e3021894 181 }
elessair 0:f269e3021894 182
elessair 0:f269e3021894 183 void serial_baud(serial_t *obj, int baudrate)
elessair 0:f269e3021894 184 {
elessair 0:f269e3021894 185 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 186
elessair 0:f269e3021894 187 obj_s->baudrate = baudrate;
elessair 0:f269e3021894 188 init_uart(obj);
elessair 0:f269e3021894 189 }
elessair 0:f269e3021894 190
elessair 0:f269e3021894 191 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
elessair 0:f269e3021894 192 {
elessair 0:f269e3021894 193 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 194
elessair 0:f269e3021894 195 if (data_bits == 9) {
elessair 0:f269e3021894 196 obj_s->databits = UART_WORDLENGTH_9B;
elessair 0:f269e3021894 197 } else {
elessair 0:f269e3021894 198 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 199 }
elessair 0:f269e3021894 200
elessair 0:f269e3021894 201 switch (parity) {
elessair 0:f269e3021894 202 case ParityOdd:
elessair 0:f269e3021894 203 obj_s->parity = UART_PARITY_ODD;
elessair 0:f269e3021894 204 break;
elessair 0:f269e3021894 205 case ParityEven:
elessair 0:f269e3021894 206 obj_s->parity = UART_PARITY_EVEN;
elessair 0:f269e3021894 207 break;
elessair 0:f269e3021894 208 default: // ParityNone
elessair 0:f269e3021894 209 case ParityForced0: // unsupported!
elessair 0:f269e3021894 210 case ParityForced1: // unsupported!
elessair 0:f269e3021894 211 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 212 break;
elessair 0:f269e3021894 213 }
elessair 0:f269e3021894 214
elessair 0:f269e3021894 215 if (stop_bits == 2) {
elessair 0:f269e3021894 216 obj_s->stopbits = UART_STOPBITS_2;
elessair 0:f269e3021894 217 } else {
elessair 0:f269e3021894 218 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 219 }
elessair 0:f269e3021894 220
elessair 0:f269e3021894 221 init_uart(obj);
elessair 0:f269e3021894 222 }
elessair 0:f269e3021894 223
elessair 0:f269e3021894 224 /******************************************************************************
elessair 0:f269e3021894 225 * INTERRUPTS HANDLING
elessair 0:f269e3021894 226 ******************************************************************************/
elessair 0:f269e3021894 227
elessair 0:f269e3021894 228 static void uart_irq(int id)
elessair 0:f269e3021894 229 {
elessair 0:f269e3021894 230 UART_HandleTypeDef * huart = &uart_handlers[id];
elessair 0:f269e3021894 231
elessair 0:f269e3021894 232 if (serial_irq_ids[id] != 0) {
elessair 0:f269e3021894 233 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 234 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 235 irq_handler(serial_irq_ids[id], TxIrq);
elessair 0:f269e3021894 236 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 237 }
elessair 0:f269e3021894 238 }
elessair 0:f269e3021894 239 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
elessair 0:f269e3021894 240 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
elessair 0:f269e3021894 241 irq_handler(serial_irq_ids[id], RxIrq);
elessair 0:f269e3021894 242 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
elessair 0:f269e3021894 243 }
elessair 0:f269e3021894 244 }
elessair 0:f269e3021894 245 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 246 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ERR) != RESET) {
elessair 0:f269e3021894 247 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
elessair 0:f269e3021894 248 }
elessair 0:f269e3021894 249 }
elessair 0:f269e3021894 250 }
elessair 0:f269e3021894 251 }
elessair 0:f269e3021894 252
elessair 0:f269e3021894 253 static void uart1_irq(void)
elessair 0:f269e3021894 254 {
elessair 0:f269e3021894 255 uart_irq(0);
elessair 0:f269e3021894 256 }
elessair 0:f269e3021894 257
elessair 0:f269e3021894 258 static void uart2_irq(void)
elessair 0:f269e3021894 259 {
elessair 0:f269e3021894 260 uart_irq(1);
elessair 0:f269e3021894 261 }
elessair 0:f269e3021894 262
elessair 0:f269e3021894 263 static void uart3_irq(void)
elessair 0:f269e3021894 264 {
elessair 0:f269e3021894 265 uart_irq(2);
elessair 0:f269e3021894 266 }
elessair 0:f269e3021894 267
elessair 0:f269e3021894 268 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
elessair 0:f269e3021894 269 {
elessair 0:f269e3021894 270 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 271
elessair 0:f269e3021894 272 irq_handler = handler;
elessair 0:f269e3021894 273 serial_irq_ids[obj_s->index] = id;
elessair 0:f269e3021894 274 }
elessair 0:f269e3021894 275
elessair 0:f269e3021894 276 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
elessair 0:f269e3021894 277 {
elessair 0:f269e3021894 278 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 279 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 280 IRQn_Type irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 281 uint32_t vector = 0;
elessair 0:f269e3021894 282
elessair 0:f269e3021894 283 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 284 irq_n = USART1_IRQn;
elessair 0:f269e3021894 285 vector = (uint32_t)&uart1_irq;
elessair 0:f269e3021894 286 }
elessair 0:f269e3021894 287
elessair 0:f269e3021894 288 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 289 irq_n = USART2_IRQn;
elessair 0:f269e3021894 290 vector = (uint32_t)&uart2_irq;
elessair 0:f269e3021894 291 }
elessair 0:f269e3021894 292
elessair 0:f269e3021894 293 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 294 irq_n = USART3_IRQn;
elessair 0:f269e3021894 295 vector = (uint32_t)&uart3_irq;
elessair 0:f269e3021894 296 }
elessair 0:f269e3021894 297
elessair 0:f269e3021894 298 if (enable) {
elessair 0:f269e3021894 299 if (irq == RxIrq) {
elessair 0:f269e3021894 300 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 301 } else { // TxIrq
elessair 0:f269e3021894 302 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 303 }
elessair 0:f269e3021894 304 NVIC_SetVector(irq_n, vector);
elessair 0:f269e3021894 305 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 306
elessair 0:f269e3021894 307 } else { // disable
elessair 0:f269e3021894 308 int all_disabled = 0;
elessair 0:f269e3021894 309 if (irq == RxIrq) {
elessair 0:f269e3021894 310 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 311 // Check if TxIrq is disabled too
elessair 0:f269e3021894 312 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
elessair 0:f269e3021894 313 all_disabled = 1;
elessair 0:f269e3021894 314 }
elessair 0:f269e3021894 315 } else { // TxIrq
elessair 0:f269e3021894 316 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 317 // Check if RxIrq is disabled too
elessair 0:f269e3021894 318 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
elessair 0:f269e3021894 319 all_disabled = 1;
elessair 0:f269e3021894 320 }
elessair 0:f269e3021894 321 }
elessair 0:f269e3021894 322
elessair 0:f269e3021894 323 if (all_disabled) {
elessair 0:f269e3021894 324 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 325 }
elessair 0:f269e3021894 326 }
elessair 0:f269e3021894 327 }
elessair 0:f269e3021894 328
elessair 0:f269e3021894 329 /******************************************************************************
elessair 0:f269e3021894 330 * READ/WRITE
elessair 0:f269e3021894 331 ******************************************************************************/
elessair 0:f269e3021894 332
elessair 0:f269e3021894 333 int serial_getc(serial_t *obj)
elessair 0:f269e3021894 334 {
elessair 0:f269e3021894 335 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 336 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 337
elessair 0:f269e3021894 338 while (!serial_readable(obj));
elessair 0:f269e3021894 339 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 340 return (int)(huart->Instance->DR & (uint8_t)0xFF);
elessair 0:f269e3021894 341 } else {
elessair 0:f269e3021894 342 return (int)(huart->Instance->DR & (uint16_t)0x1FF);
elessair 0:f269e3021894 343 }
elessair 0:f269e3021894 344 }
elessair 0:f269e3021894 345
elessair 0:f269e3021894 346 void serial_putc(serial_t *obj, int c)
elessair 0:f269e3021894 347 {
elessair 0:f269e3021894 348 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 349 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 350
elessair 0:f269e3021894 351 while (!serial_writable(obj));
elessair 0:f269e3021894 352 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 353 huart->Instance->DR = (uint8_t)(c & (uint8_t)0xFF);
elessair 0:f269e3021894 354 } else {
elessair 0:f269e3021894 355 huart->Instance->DR = (uint16_t)(c & (uint16_t)0x1FF);
elessair 0:f269e3021894 356 }
elessair 0:f269e3021894 357 }
elessair 0:f269e3021894 358
elessair 0:f269e3021894 359 int serial_readable(serial_t *obj)
elessair 0:f269e3021894 360 {
elessair 0:f269e3021894 361 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 362 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 363
elessair 0:f269e3021894 364 // Check if data is received
elessair 0:f269e3021894 365 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 366 }
elessair 0:f269e3021894 367
elessair 0:f269e3021894 368 int serial_writable(serial_t *obj)
elessair 0:f269e3021894 369 {
elessair 0:f269e3021894 370 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 371 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 372
elessair 0:f269e3021894 373 // Check if data is transmitted
elessair 0:f269e3021894 374 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 375 }
elessair 0:f269e3021894 376
elessair 0:f269e3021894 377 void serial_clear(serial_t *obj)
elessair 0:f269e3021894 378 {
elessair 0:f269e3021894 379 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 380 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 381
elessair 0:f269e3021894 382 huart->TxXferCount = 0;
elessair 0:f269e3021894 383 huart->RxXferCount = 0;
elessair 0:f269e3021894 384 }
elessair 0:f269e3021894 385
elessair 0:f269e3021894 386 void serial_pinout_tx(PinName tx)
elessair 0:f269e3021894 387 {
elessair 0:f269e3021894 388 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 389 }
elessair 0:f269e3021894 390
elessair 0:f269e3021894 391 void serial_break_set(serial_t *obj)
elessair 0:f269e3021894 392 {
elessair 0:f269e3021894 393 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 394 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 395
elessair 0:f269e3021894 396 HAL_LIN_SendBreak(huart);
elessair 0:f269e3021894 397 }
elessair 0:f269e3021894 398
elessair 0:f269e3021894 399 void serial_break_clear(serial_t *obj)
elessair 0:f269e3021894 400 {
elessair 0:f269e3021894 401 (void)obj;
elessair 0:f269e3021894 402 }
elessair 0:f269e3021894 403
elessair 0:f269e3021894 404 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 405
elessair 0:f269e3021894 406 /******************************************************************************
elessair 0:f269e3021894 407 * LOCAL HELPER FUNCTIONS
elessair 0:f269e3021894 408 ******************************************************************************/
elessair 0:f269e3021894 409
elessair 0:f269e3021894 410 /**
elessair 0:f269e3021894 411 * Configure the TX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 412 *
elessair 0:f269e3021894 413 * @param obj The serial object.
elessair 0:f269e3021894 414 * @param tx The buffer for sending.
elessair 0:f269e3021894 415 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 416 */
elessair 0:f269e3021894 417 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
elessair 0:f269e3021894 418 {
elessair 0:f269e3021894 419 (void)width;
elessair 0:f269e3021894 420
elessair 0:f269e3021894 421 // Exit if a transmit is already on-going
elessair 0:f269e3021894 422 if (serial_tx_active(obj)) {
elessair 0:f269e3021894 423 return;
elessair 0:f269e3021894 424 }
elessair 0:f269e3021894 425
elessair 0:f269e3021894 426 obj->tx_buff.buffer = tx;
elessair 0:f269e3021894 427 obj->tx_buff.length = tx_length;
elessair 0:f269e3021894 428 obj->tx_buff.pos = 0;
elessair 0:f269e3021894 429 }
elessair 0:f269e3021894 430
elessair 0:f269e3021894 431 /**
elessair 0:f269e3021894 432 * Configure the RX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 433 *
elessair 0:f269e3021894 434 * @param obj The serial object.
elessair 0:f269e3021894 435 * @param tx The buffer for sending.
elessair 0:f269e3021894 436 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 437 */
elessair 0:f269e3021894 438 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
elessair 0:f269e3021894 439 {
elessair 0:f269e3021894 440 (void)width;
elessair 0:f269e3021894 441
elessair 0:f269e3021894 442 // Exit if a reception is already on-going
elessair 0:f269e3021894 443 if (serial_rx_active(obj)) {
elessair 0:f269e3021894 444 return;
elessair 0:f269e3021894 445 }
elessair 0:f269e3021894 446
elessair 0:f269e3021894 447 obj->rx_buff.buffer = rx;
elessair 0:f269e3021894 448 obj->rx_buff.length = rx_length;
elessair 0:f269e3021894 449 obj->rx_buff.pos = 0;
elessair 0:f269e3021894 450 }
elessair 0:f269e3021894 451
elessair 0:f269e3021894 452 /**
elessair 0:f269e3021894 453 * Configure events
elessair 0:f269e3021894 454 *
elessair 0:f269e3021894 455 * @param obj The serial object
elessair 0:f269e3021894 456 * @param event The logical OR of the events to configure
elessair 0:f269e3021894 457 * @param enable Set to non-zero to enable events, or zero to disable them
elessair 0:f269e3021894 458 */
elessair 0:f269e3021894 459 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
elessair 0:f269e3021894 460 {
elessair 0:f269e3021894 461 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 462
elessair 0:f269e3021894 463 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
elessair 0:f269e3021894 464 if (enable) {
elessair 0:f269e3021894 465 obj_s->events |= event;
elessair 0:f269e3021894 466 } else {
elessair 0:f269e3021894 467 obj_s->events &= ~event;
elessair 0:f269e3021894 468 }
elessair 0:f269e3021894 469 }
elessair 0:f269e3021894 470
elessair 0:f269e3021894 471
elessair 0:f269e3021894 472 /**
elessair 0:f269e3021894 473 * Get index of serial object TX IRQ, relating it to the physical peripheral.
elessair 0:f269e3021894 474 *
elessair 0:f269e3021894 475 * @param obj pointer to serial object
elessair 0:f269e3021894 476 * @return internal NVIC TX IRQ index of U(S)ART peripheral
elessair 0:f269e3021894 477 */
elessair 0:f269e3021894 478 static IRQn_Type serial_get_irq_n(serial_t *obj)
elessair 0:f269e3021894 479 {
elessair 0:f269e3021894 480 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 481 IRQn_Type irq_n;
elessair 0:f269e3021894 482
elessair 0:f269e3021894 483 switch (obj_s->index) {
elessair 0:f269e3021894 484 case 0:
elessair 0:f269e3021894 485 irq_n = USART1_IRQn;
elessair 0:f269e3021894 486 break;
elessair 0:f269e3021894 487
elessair 0:f269e3021894 488 case 1:
elessair 0:f269e3021894 489 irq_n = USART2_IRQn;
elessair 0:f269e3021894 490 break;
elessair 0:f269e3021894 491
elessair 0:f269e3021894 492 case 2:
elessair 0:f269e3021894 493 irq_n = USART3_IRQn;
elessair 0:f269e3021894 494 break;
elessair 0:f269e3021894 495
elessair 0:f269e3021894 496 default:
elessair 0:f269e3021894 497 irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 498 }
elessair 0:f269e3021894 499
elessair 0:f269e3021894 500 return irq_n;
elessair 0:f269e3021894 501 }
elessair 0:f269e3021894 502
elessair 0:f269e3021894 503 /******************************************************************************
elessair 0:f269e3021894 504 * MBED API FUNCTIONS
elessair 0:f269e3021894 505 ******************************************************************************/
elessair 0:f269e3021894 506
elessair 0:f269e3021894 507 /**
elessair 0:f269e3021894 508 * Begin asynchronous TX transfer. The used buffer is specified in the serial
elessair 0:f269e3021894 509 * object, tx_buff
elessair 0:f269e3021894 510 *
elessair 0:f269e3021894 511 * @param obj The serial object
elessair 0:f269e3021894 512 * @param tx The buffer for sending
elessair 0:f269e3021894 513 * @param tx_length The number of words to transmit
elessair 0:f269e3021894 514 * @param tx_width The bit width of buffer word
elessair 0:f269e3021894 515 * @param handler The serial handler
elessair 0:f269e3021894 516 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 517 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 518 * @return Returns number of data transfered, or 0 otherwise
elessair 0:f269e3021894 519 */
elessair 0:f269e3021894 520 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 521 {
elessair 0:f269e3021894 522 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 523 (void) hint;
elessair 0:f269e3021894 524
elessair 0:f269e3021894 525 // Check buffer is ok
elessair 0:f269e3021894 526 MBED_ASSERT(tx != (void*)0);
elessair 0:f269e3021894 527 MBED_ASSERT(tx_width == 8); // support only 8b width
elessair 0:f269e3021894 528
elessair 0:f269e3021894 529 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 530 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 531
elessair 0:f269e3021894 532 if (tx_length == 0) {
elessair 0:f269e3021894 533 return 0;
elessair 0:f269e3021894 534 }
elessair 0:f269e3021894 535
elessair 0:f269e3021894 536 // Set up buffer
elessair 0:f269e3021894 537 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
elessair 0:f269e3021894 538
elessair 0:f269e3021894 539 // Set up events
elessair 0:f269e3021894 540 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
elessair 0:f269e3021894 541 serial_enable_event(obj, event, 1); // Set only the wanted events
elessair 0:f269e3021894 542
elessair 0:f269e3021894 543 // Enable interrupt
elessair 0:f269e3021894 544 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 545 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 546 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 547 NVIC_SetPriority(irq_n, 1);
elessair 0:f269e3021894 548 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 549 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 550
elessair 0:f269e3021894 551 // the following function will enable UART_IT_TXE and error interrupts
elessair 0:f269e3021894 552 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
elessair 0:f269e3021894 553 return 0;
elessair 0:f269e3021894 554 }
elessair 0:f269e3021894 555
elessair 0:f269e3021894 556 return tx_length;
elessair 0:f269e3021894 557 }
elessair 0:f269e3021894 558
elessair 0:f269e3021894 559 /**
elessair 0:f269e3021894 560 * Begin asynchronous RX transfer (enable interrupt for data collecting)
elessair 0:f269e3021894 561 * The used buffer is specified in the serial object, rx_buff
elessair 0:f269e3021894 562 *
elessair 0:f269e3021894 563 * @param obj The serial object
elessair 0:f269e3021894 564 * @param rx The buffer for sending
elessair 0:f269e3021894 565 * @param rx_length The number of words to transmit
elessair 0:f269e3021894 566 * @param rx_width The bit width of buffer word
elessair 0:f269e3021894 567 * @param handler The serial handler
elessair 0:f269e3021894 568 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 569 * @param handler The serial handler
elessair 0:f269e3021894 570 * @param char_match A character in range 0-254 to be matched
elessair 0:f269e3021894 571 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 572 */
elessair 0:f269e3021894 573 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 574 {
elessair 0:f269e3021894 575 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 576 (void) hint;
elessair 0:f269e3021894 577
elessair 0:f269e3021894 578 /* Sanity check arguments */
elessair 0:f269e3021894 579 MBED_ASSERT(obj);
elessair 0:f269e3021894 580 MBED_ASSERT(rx != (void*)0);
elessair 0:f269e3021894 581 MBED_ASSERT(rx_width == 8); // support only 8b width
elessair 0:f269e3021894 582
elessair 0:f269e3021894 583 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 584 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 585
elessair 0:f269e3021894 586 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
elessair 0:f269e3021894 587 serial_enable_event(obj, event, 1);
elessair 0:f269e3021894 588
elessair 0:f269e3021894 589 // set CharMatch
elessair 0:f269e3021894 590 obj->char_match = char_match;
elessair 0:f269e3021894 591
elessair 0:f269e3021894 592 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
elessair 0:f269e3021894 593
elessair 0:f269e3021894 594 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 595 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 596 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 597 NVIC_SetPriority(irq_n, 0);
elessair 0:f269e3021894 598 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 599 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 600
elessair 0:f269e3021894 601 // following HAL function will enable the RXNE interrupt + error interrupts
elessair 0:f269e3021894 602 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
elessair 0:f269e3021894 603 }
elessair 0:f269e3021894 604
elessair 0:f269e3021894 605 /**
elessair 0:f269e3021894 606 * Attempts to determine if the serial peripheral is already in use for TX
elessair 0:f269e3021894 607 *
elessair 0:f269e3021894 608 * @param obj The serial object
elessair 0:f269e3021894 609 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 610 */
elessair 0:f269e3021894 611 uint8_t serial_tx_active(serial_t *obj)
elessair 0:f269e3021894 612 {
elessair 0:f269e3021894 613 MBED_ASSERT(obj);
elessair 0:f269e3021894 614
elessair 0:f269e3021894 615 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 616 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 617
elessair 0:f269e3021894 618 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
elessair 0:f269e3021894 619 }
elessair 0:f269e3021894 620
elessair 0:f269e3021894 621 /**
elessair 0:f269e3021894 622 * Attempts to determine if the serial peripheral is already in use for RX
elessair 0:f269e3021894 623 *
elessair 0:f269e3021894 624 * @param obj The serial object
elessair 0:f269e3021894 625 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 626 */
elessair 0:f269e3021894 627 uint8_t serial_rx_active(serial_t *obj)
elessair 0:f269e3021894 628 {
elessair 0:f269e3021894 629 MBED_ASSERT(obj);
elessair 0:f269e3021894 630
elessair 0:f269e3021894 631 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 632 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 633
elessair 0:f269e3021894 634 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
elessair 0:f269e3021894 635 }
elessair 0:f269e3021894 636
elessair 0:f269e3021894 637 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 638 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 639 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 640 }
elessair 0:f269e3021894 641 }
elessair 0:f269e3021894 642
elessair 0:f269e3021894 643 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 644 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 645 volatile uint32_t tmpval = huart->Instance->DR; // Clear PE flag
elessair 0:f269e3021894 646 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 647 volatile uint32_t tmpval = huart->Instance->DR; // Clear FE flag
elessair 0:f269e3021894 648 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
elessair 0:f269e3021894 649 volatile uint32_t tmpval = huart->Instance->DR; // Clear NE flag
elessair 0:f269e3021894 650 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 651 volatile uint32_t tmpval = huart->Instance->DR; // Clear ORE flag
elessair 0:f269e3021894 652 }
elessair 0:f269e3021894 653 }
elessair 0:f269e3021894 654
elessair 0:f269e3021894 655 /**
elessair 0:f269e3021894 656 * The asynchronous TX and RX handler.
elessair 0:f269e3021894 657 *
elessair 0:f269e3021894 658 * @param obj The serial object
elessair 0:f269e3021894 659 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
elessair 0:f269e3021894 660 */
elessair 0:f269e3021894 661 int serial_irq_handler_asynch(serial_t *obj)
elessair 0:f269e3021894 662 {
elessair 0:f269e3021894 663 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 664 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 665
elessair 0:f269e3021894 666 volatile int return_event = 0;
elessair 0:f269e3021894 667 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
elessair 0:f269e3021894 668 uint8_t i = 0;
elessair 0:f269e3021894 669
elessair 0:f269e3021894 670 // TX PART:
elessair 0:f269e3021894 671 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 672 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 673 // Return event SERIAL_EVENT_TX_COMPLETE if requested
elessair 0:f269e3021894 674 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
elessair 0:f269e3021894 675 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 676 }
elessair 0:f269e3021894 677 }
elessair 0:f269e3021894 678 }
elessair 0:f269e3021894 679
elessair 0:f269e3021894 680 // Handle error events
elessair 0:f269e3021894 681 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 682 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 683 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
elessair 0:f269e3021894 684 }
elessair 0:f269e3021894 685 }
elessair 0:f269e3021894 686
elessair 0:f269e3021894 687 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 688 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 689 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
elessair 0:f269e3021894 690 }
elessair 0:f269e3021894 691 }
elessair 0:f269e3021894 692
elessair 0:f269e3021894 693 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 694 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 695 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
elessair 0:f269e3021894 696 }
elessair 0:f269e3021894 697 }
elessair 0:f269e3021894 698
elessair 0:f269e3021894 699 HAL_UART_IRQHandler(huart);
elessair 0:f269e3021894 700
elessair 0:f269e3021894 701 // Abort if an error occurs
elessair 0:f269e3021894 702 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
elessair 0:f269e3021894 703 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
elessair 0:f269e3021894 704 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
elessair 0:f269e3021894 705 return return_event;
elessair 0:f269e3021894 706 }
elessair 0:f269e3021894 707
elessair 0:f269e3021894 708 //RX PART
elessair 0:f269e3021894 709 if (huart->RxXferSize != 0) {
elessair 0:f269e3021894 710 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
elessair 0:f269e3021894 711 }
elessair 0:f269e3021894 712 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
elessair 0:f269e3021894 713 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 714 }
elessair 0:f269e3021894 715
elessair 0:f269e3021894 716 // Check if char_match is present
elessair 0:f269e3021894 717 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
elessair 0:f269e3021894 718 if (buf != NULL) {
elessair 0:f269e3021894 719 for (i = 0; i < obj->rx_buff.pos; i++) {
elessair 0:f269e3021894 720 if (buf[i] == obj->char_match) {
elessair 0:f269e3021894 721 obj->rx_buff.pos = i;
elessair 0:f269e3021894 722 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
elessair 0:f269e3021894 723 serial_rx_abort_asynch(obj);
elessair 0:f269e3021894 724 break;
elessair 0:f269e3021894 725 }
elessair 0:f269e3021894 726 }
elessair 0:f269e3021894 727 }
elessair 0:f269e3021894 728 }
elessair 0:f269e3021894 729
elessair 0:f269e3021894 730 return return_event;
elessair 0:f269e3021894 731 }
elessair 0:f269e3021894 732
elessair 0:f269e3021894 733 /**
elessair 0:f269e3021894 734 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elessair 0:f269e3021894 735 * flush TX hardware buffer if TX FIFO is used
elessair 0:f269e3021894 736 *
elessair 0:f269e3021894 737 * @param obj The serial object
elessair 0:f269e3021894 738 */
elessair 0:f269e3021894 739 void serial_tx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 740 {
elessair 0:f269e3021894 741 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 742 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 743
elessair 0:f269e3021894 744 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 745 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
elessair 0:f269e3021894 746
elessair 0:f269e3021894 747 // clear flags
elessair 0:f269e3021894 748 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
elessair 0:f269e3021894 749
elessair 0:f269e3021894 750 // reset states
elessair 0:f269e3021894 751 huart->TxXferCount = 0;
elessair 0:f269e3021894 752 // update handle state
elessair 0:f269e3021894 753 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 754 huart->State = HAL_UART_STATE_BUSY_RX;
elessair 0:f269e3021894 755 } else {
elessair 0:f269e3021894 756 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 757 }
elessair 0:f269e3021894 758 }
elessair 0:f269e3021894 759
elessair 0:f269e3021894 760 /**
elessair 0:f269e3021894 761 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
elessair 0:f269e3021894 762 * flush RX hardware buffer if RX FIFO is used
elessair 0:f269e3021894 763 *
elessair 0:f269e3021894 764 * @param obj The serial object
elessair 0:f269e3021894 765 */
elessair 0:f269e3021894 766 void serial_rx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 767 {
elessair 0:f269e3021894 768 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 769 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 770
elessair 0:f269e3021894 771 // disable interrupts
elessair 0:f269e3021894 772 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 773 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
elessair 0:f269e3021894 774 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
elessair 0:f269e3021894 775
elessair 0:f269e3021894 776 // clear flags
elessair 0:f269e3021894 777 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
elessair 0:f269e3021894 778 volatile uint32_t tmpval = huart->Instance->DR; // Clear errors flag
elessair 0:f269e3021894 779
elessair 0:f269e3021894 780 // reset states
elessair 0:f269e3021894 781 huart->RxXferCount = 0;
elessair 0:f269e3021894 782 // update handle state
elessair 0:f269e3021894 783 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 784 huart->State = HAL_UART_STATE_BUSY_TX;
elessair 0:f269e3021894 785 } else {
elessair 0:f269e3021894 786 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 787 }
elessair 0:f269e3021894 788 }
elessair 0:f269e3021894 789
elessair 0:f269e3021894 790 #endif
elessair 0:f269e3021894 791
elessair 0:f269e3021894 792 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 793
elessair 0:f269e3021894 794 /**
elessair 0:f269e3021894 795 * Set HW Control Flow
elessair 0:f269e3021894 796 * @param obj The serial object
elessair 0:f269e3021894 797 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
elessair 0:f269e3021894 798 * @param rxflow Pin for the rxflow
elessair 0:f269e3021894 799 * @param txflow Pin for the txflow
elessair 0:f269e3021894 800 */
elessair 0:f269e3021894 801 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
elessair 0:f269e3021894 802 {
elessair 0:f269e3021894 803 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 804
elessair 0:f269e3021894 805 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 806 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 807 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 808
elessair 0:f269e3021894 809 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 810 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
elessair 0:f269e3021894 811 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 812
elessair 0:f269e3021894 813 if(type == FlowControlNone) {
elessair 0:f269e3021894 814 // Disable hardware flow control
elessair 0:f269e3021894 815 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 816 }
elessair 0:f269e3021894 817 if (type == FlowControlRTS) {
elessair 0:f269e3021894 818 // Enable RTS
elessair 0:f269e3021894 819 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 820 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
elessair 0:f269e3021894 821 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 822 // Enable the pin for RTS function
elessair 0:f269e3021894 823 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 824 }
elessair 0:f269e3021894 825 if (type == FlowControlCTS) {
elessair 0:f269e3021894 826 // Enable CTS
elessair 0:f269e3021894 827 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 828 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
elessair 0:f269e3021894 829 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 830 // Enable the pin for CTS function
elessair 0:f269e3021894 831 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 832 }
elessair 0:f269e3021894 833 if (type == FlowControlRTSCTS) {
elessair 0:f269e3021894 834 // Enable CTS & RTS
elessair 0:f269e3021894 835 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 836 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 837 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
elessair 0:f269e3021894 838 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 839 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 840 // Enable the pin for CTS function
elessair 0:f269e3021894 841 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 842 // Enable the pin for RTS function
elessair 0:f269e3021894 843 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 844 }
elessair 0:f269e3021894 845
elessair 0:f269e3021894 846 init_uart(obj);
elessair 0:f269e3021894 847 }
elessair 0:f269e3021894 848
elessair 0:f269e3021894 849 #endif
elessair 0:f269e3021894 850
elessair 0:f269e3021894 851 #endif