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_STM32F3/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 <string.h>
elessair 0:f269e3021894 38 #include "PeripheralPins.h"
elessair 0:f269e3021894 39 #include "mbed_error.h"
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 #define UART_NUM (5)
elessair 0:f269e3021894 42
elessair 0:f269e3021894 43 static uint32_t serial_irq_ids[UART_NUM] = {0};
elessair 0:f269e3021894 44 static UART_HandleTypeDef uart_handlers[UART_NUM];
elessair 0:f269e3021894 45
elessair 0:f269e3021894 46 static uart_irq_handler irq_handler;
elessair 0:f269e3021894 47
elessair 0:f269e3021894 48 int stdio_uart_inited = 0;
elessair 0:f269e3021894 49 serial_t stdio_uart;
elessair 0:f269e3021894 50
elessair 0:f269e3021894 51 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 52 #define SERIAL_S(obj) (&((obj)->serial))
elessair 0:f269e3021894 53 #else
elessair 0:f269e3021894 54 #define SERIAL_S(obj) (obj)
elessair 0:f269e3021894 55 #endif
elessair 0:f269e3021894 56
elessair 0:f269e3021894 57 static void init_uart(serial_t *obj)
elessair 0:f269e3021894 58 {
elessair 0:f269e3021894 59 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 60 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 61 huart->Instance = (USART_TypeDef *)(obj_s->uart);
elessair 0:f269e3021894 62
elessair 0:f269e3021894 63 huart->Init.BaudRate = obj_s->baudrate;
elessair 0:f269e3021894 64 huart->Init.WordLength = obj_s->databits;
elessair 0:f269e3021894 65 huart->Init.StopBits = obj_s->stopbits;
elessair 0:f269e3021894 66 huart->Init.Parity = obj_s->parity;
elessair 0:f269e3021894 67 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 68 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
elessair 0:f269e3021894 69 #else
elessair 0:f269e3021894 70 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 71 #endif
elessair 0:f269e3021894 72 huart->TxXferCount = 0;
elessair 0:f269e3021894 73 huart->TxXferSize = 0;
elessair 0:f269e3021894 74 huart->RxXferCount = 0;
elessair 0:f269e3021894 75 huart->RxXferSize = 0;
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 if (obj_s->pin_rx == NC) {
elessair 0:f269e3021894 78 huart->Init.Mode = UART_MODE_TX;
elessair 0:f269e3021894 79 } else if (obj_s->pin_tx == NC) {
elessair 0:f269e3021894 80 huart->Init.Mode = UART_MODE_RX;
elessair 0:f269e3021894 81 } else {
elessair 0:f269e3021894 82 huart->Init.Mode = UART_MODE_TX_RX;
elessair 0:f269e3021894 83 }
elessair 0:f269e3021894 84
elessair 0:f269e3021894 85
elessair 0:f269e3021894 86 if (HAL_UART_Init(huart) != HAL_OK) {
elessair 0:f269e3021894 87 error("Cannot initialize UART\n");
elessair 0:f269e3021894 88 }
elessair 0:f269e3021894 89 }
elessair 0:f269e3021894 90
elessair 0:f269e3021894 91 void serial_init(serial_t *obj, PinName tx, PinName rx)
elessair 0:f269e3021894 92 {
elessair 0:f269e3021894 93 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 94
elessair 0:f269e3021894 95 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 96 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
elessair 0:f269e3021894 97 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
elessair 0:f269e3021894 98
elessair 0:f269e3021894 99 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 100 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
elessair 0:f269e3021894 101 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 102
elessair 0:f269e3021894 103 // Enable USART clock + switch to SystemClock
elessair 0:f269e3021894 104 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 105 __USART1_FORCE_RESET();
elessair 0:f269e3021894 106 __USART1_RELEASE_RESET();
elessair 0:f269e3021894 107 __USART1_CLK_ENABLE();
elessair 0:f269e3021894 108 #if defined(RCC_USART1CLKSOURCE_SYSCLK)
elessair 0:f269e3021894 109 __HAL_RCC_USART1_CONFIG(RCC_USART1CLKSOURCE_SYSCLK);
elessair 0:f269e3021894 110 #endif
elessair 0:f269e3021894 111 obj_s->index = 0;
elessair 0:f269e3021894 112 }
elessair 0:f269e3021894 113 #if defined(USART2_BASE)
elessair 0:f269e3021894 114 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 115 __USART2_FORCE_RESET();
elessair 0:f269e3021894 116 __USART2_RELEASE_RESET();
elessair 0:f269e3021894 117 __USART2_CLK_ENABLE();
elessair 0:f269e3021894 118 #if defined(RCC_USART2CLKSOURCE_SYSCLK)
elessair 0:f269e3021894 119 __HAL_RCC_USART2_CONFIG(RCC_USART2CLKSOURCE_SYSCLK);
elessair 0:f269e3021894 120 #endif
elessair 0:f269e3021894 121 obj_s->index = 1;
elessair 0:f269e3021894 122 }
elessair 0:f269e3021894 123 #endif
elessair 0:f269e3021894 124 #if defined(USART3_BASE)
elessair 0:f269e3021894 125 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 126 __USART3_FORCE_RESET();
elessair 0:f269e3021894 127 __USART3_RELEASE_RESET();
elessair 0:f269e3021894 128 __USART3_CLK_ENABLE();
elessair 0:f269e3021894 129 #if defined(RCC_USART3CLKSOURCE_SYSCLK)
elessair 0:f269e3021894 130 __HAL_RCC_USART3_CONFIG(RCC_USART3CLKSOURCE_SYSCLK);
elessair 0:f269e3021894 131 #endif
elessair 0:f269e3021894 132 obj_s->index = 2;
elessair 0:f269e3021894 133 }
elessair 0:f269e3021894 134 #endif
elessair 0:f269e3021894 135 #if defined(UART4_BASE)
elessair 0:f269e3021894 136 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 137 __UART4_FORCE_RESET();
elessair 0:f269e3021894 138 __UART4_RELEASE_RESET();
elessair 0:f269e3021894 139 __UART4_CLK_ENABLE();
elessair 0:f269e3021894 140 #if defined(RCC_UART4CLKSOURCE_SYSCLK)
elessair 0:f269e3021894 141 __HAL_RCC_UART4_CONFIG(RCC_UART4CLKSOURCE_SYSCLK);
elessair 0:f269e3021894 142 #endif
elessair 0:f269e3021894 143 obj_s->index = 3;
elessair 0:f269e3021894 144 }
elessair 0:f269e3021894 145 #endif
elessair 0:f269e3021894 146 #if defined(UART5_BASE)
elessair 0:f269e3021894 147 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 148 __HAL_RCC_UART5_FORCE_RESET();
elessair 0:f269e3021894 149 __HAL_RCC_UART5_RELEASE_RESET();
elessair 0:f269e3021894 150 __UART5_CLK_ENABLE();
elessair 0:f269e3021894 151 #if defined(RCC_UART5CLKSOURCE_SYSCLK)
elessair 0:f269e3021894 152 __HAL_RCC_UART5_CONFIG(RCC_UART5CLKSOURCE_SYSCLK);
elessair 0:f269e3021894 153 #endif
elessair 0:f269e3021894 154 obj_s->index = 4;
elessair 0:f269e3021894 155 }
elessair 0:f269e3021894 156 #endif
elessair 0:f269e3021894 157
elessair 0:f269e3021894 158 // Configure the UART pins
elessair 0:f269e3021894 159 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 160 pinmap_pinout(rx, PinMap_UART_RX);
elessair 0:f269e3021894 161
elessair 0:f269e3021894 162 if (tx != NC) {
elessair 0:f269e3021894 163 pin_mode(tx, PullUp);
elessair 0:f269e3021894 164 }
elessair 0:f269e3021894 165 if (rx != NC) {
elessair 0:f269e3021894 166 pin_mode(rx, PullUp);
elessair 0:f269e3021894 167 }
elessair 0:f269e3021894 168
elessair 0:f269e3021894 169 // Configure UART
elessair 0:f269e3021894 170 obj_s->baudrate = 9600;
elessair 0:f269e3021894 171 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 172 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 173 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 174
elessair 0:f269e3021894 175 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 176 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 177 #endif
elessair 0:f269e3021894 178
elessair 0:f269e3021894 179 obj_s->pin_tx = tx;
elessair 0:f269e3021894 180 obj_s->pin_rx = rx;
elessair 0:f269e3021894 181
elessair 0:f269e3021894 182 init_uart(obj);
elessair 0:f269e3021894 183
elessair 0:f269e3021894 184 // For stdio management
elessair 0:f269e3021894 185 if (obj_s->uart == STDIO_UART) {
elessair 0:f269e3021894 186 stdio_uart_inited = 1;
elessair 0:f269e3021894 187 memcpy(&stdio_uart, obj, sizeof(serial_t));
elessair 0:f269e3021894 188 }
elessair 0:f269e3021894 189 }
elessair 0:f269e3021894 190
elessair 0:f269e3021894 191 void serial_free(serial_t *obj)
elessair 0:f269e3021894 192 {
elessair 0:f269e3021894 193 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 194
elessair 0:f269e3021894 195 // Reset UART and disable clock
elessair 0:f269e3021894 196 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 197 __USART1_FORCE_RESET();
elessair 0:f269e3021894 198 __USART1_RELEASE_RESET();
elessair 0:f269e3021894 199 __USART1_CLK_DISABLE();
elessair 0:f269e3021894 200 }
elessair 0:f269e3021894 201 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 202 __USART2_FORCE_RESET();
elessair 0:f269e3021894 203 __USART2_RELEASE_RESET();
elessair 0:f269e3021894 204 __USART2_CLK_DISABLE();
elessair 0:f269e3021894 205 }
elessair 0:f269e3021894 206 #if defined(USART3_BASE)
elessair 0:f269e3021894 207 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 208 __USART3_FORCE_RESET();
elessair 0:f269e3021894 209 __USART3_RELEASE_RESET();
elessair 0:f269e3021894 210 __USART3_CLK_DISABLE();
elessair 0:f269e3021894 211 }
elessair 0:f269e3021894 212 #endif
elessair 0:f269e3021894 213 #if defined(UART4_BASE)
elessair 0:f269e3021894 214 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 215 __UART4_FORCE_RESET();
elessair 0:f269e3021894 216 __UART4_RELEASE_RESET();
elessair 0:f269e3021894 217 __UART4_CLK_DISABLE();
elessair 0:f269e3021894 218 }
elessair 0:f269e3021894 219 #endif
elessair 0:f269e3021894 220 #if defined(UART5_BASE)
elessair 0:f269e3021894 221 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 222 __UART5_FORCE_RESET();
elessair 0:f269e3021894 223 __UART5_RELEASE_RESET();
elessair 0:f269e3021894 224 __UART5_CLK_DISABLE();
elessair 0:f269e3021894 225 }
elessair 0:f269e3021894 226 #endif
elessair 0:f269e3021894 227
elessair 0:f269e3021894 228 // Configure GPIOs
elessair 0:f269e3021894 229 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 230 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 231
elessair 0:f269e3021894 232 serial_irq_ids[obj_s->index] = 0;
elessair 0:f269e3021894 233 }
elessair 0:f269e3021894 234
elessair 0:f269e3021894 235 void serial_baud(serial_t *obj, int baudrate)
elessair 0:f269e3021894 236 {
elessair 0:f269e3021894 237 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 238
elessair 0:f269e3021894 239 obj_s->baudrate = baudrate;
elessair 0:f269e3021894 240 init_uart(obj);
elessair 0:f269e3021894 241 }
elessair 0:f269e3021894 242
elessair 0:f269e3021894 243 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
elessair 0:f269e3021894 244 {
elessair 0:f269e3021894 245 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 246
elessair 0:f269e3021894 247 if (data_bits == 9) {
elessair 0:f269e3021894 248 obj_s->databits = UART_WORDLENGTH_9B;
elessair 0:f269e3021894 249 } else {
elessair 0:f269e3021894 250 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 251 }
elessair 0:f269e3021894 252
elessair 0:f269e3021894 253 switch (parity) {
elessair 0:f269e3021894 254 case ParityOdd:
elessair 0:f269e3021894 255 obj_s->parity = UART_PARITY_ODD;
elessair 0:f269e3021894 256 break;
elessair 0:f269e3021894 257 case ParityEven:
elessair 0:f269e3021894 258 obj_s->parity = UART_PARITY_EVEN;
elessair 0:f269e3021894 259 break;
elessair 0:f269e3021894 260 default: // ParityNone
elessair 0:f269e3021894 261 case ParityForced0: // unsupported!
elessair 0:f269e3021894 262 case ParityForced1: // unsupported!
elessair 0:f269e3021894 263 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 264 break;
elessair 0:f269e3021894 265 }
elessair 0:f269e3021894 266
elessair 0:f269e3021894 267 if (stop_bits == 2) {
elessair 0:f269e3021894 268 obj_s->stopbits = UART_STOPBITS_2;
elessair 0:f269e3021894 269 } else {
elessair 0:f269e3021894 270 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 271 }
elessair 0:f269e3021894 272
elessair 0:f269e3021894 273 init_uart(obj);
elessair 0:f269e3021894 274 }
elessair 0:f269e3021894 275
elessair 0:f269e3021894 276 /******************************************************************************
elessair 0:f269e3021894 277 * INTERRUPTS HANDLING
elessair 0:f269e3021894 278 ******************************************************************************/
elessair 0:f269e3021894 279
elessair 0:f269e3021894 280 static void uart_irq(int id)
elessair 0:f269e3021894 281 {
elessair 0:f269e3021894 282 UART_HandleTypeDef * huart = &uart_handlers[id];
elessair 0:f269e3021894 283
elessair 0:f269e3021894 284 if (serial_irq_ids[id] != 0) {
elessair 0:f269e3021894 285 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 286 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 287 irq_handler(serial_irq_ids[id], TxIrq);
elessair 0:f269e3021894 288 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 289 }
elessair 0:f269e3021894 290 }
elessair 0:f269e3021894 291 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
elessair 0:f269e3021894 292 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
elessair 0:f269e3021894 293 irq_handler(serial_irq_ids[id], RxIrq);
elessair 0:f269e3021894 294 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 295 }
elessair 0:f269e3021894 296 }
elessair 0:f269e3021894 297 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 298 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ORE) != RESET) {
elessair 0:f269e3021894 299 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 300 }
elessair 0:f269e3021894 301 }
elessair 0:f269e3021894 302 }
elessair 0:f269e3021894 303 }
elessair 0:f269e3021894 304
elessair 0:f269e3021894 305 static void uart1_irq(void)
elessair 0:f269e3021894 306 {
elessair 0:f269e3021894 307 uart_irq(0);
elessair 0:f269e3021894 308 }
elessair 0:f269e3021894 309
elessair 0:f269e3021894 310 static void uart2_irq(void)
elessair 0:f269e3021894 311 {
elessair 0:f269e3021894 312 uart_irq(1);
elessair 0:f269e3021894 313 }
elessair 0:f269e3021894 314
elessair 0:f269e3021894 315 #if defined(USART3_BASE)
elessair 0:f269e3021894 316 static void uart3_irq(void)
elessair 0:f269e3021894 317 {
elessair 0:f269e3021894 318 uart_irq(2);
elessair 0:f269e3021894 319 }
elessair 0:f269e3021894 320 #endif
elessair 0:f269e3021894 321
elessair 0:f269e3021894 322 #if defined(UART4_BASE)
elessair 0:f269e3021894 323 static void uart4_irq(void)
elessair 0:f269e3021894 324 {
elessair 0:f269e3021894 325 uart_irq(3);
elessair 0:f269e3021894 326 }
elessair 0:f269e3021894 327 #endif
elessair 0:f269e3021894 328
elessair 0:f269e3021894 329 #if defined(UART5_BASE)
elessair 0:f269e3021894 330 static void uart5_irq(void)
elessair 0:f269e3021894 331 {
elessair 0:f269e3021894 332 uart_irq(4);
elessair 0:f269e3021894 333 }
elessair 0:f269e3021894 334 #endif
elessair 0:f269e3021894 335
elessair 0:f269e3021894 336 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
elessair 0:f269e3021894 337 {
elessair 0:f269e3021894 338 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 339
elessair 0:f269e3021894 340 irq_handler = handler;
elessair 0:f269e3021894 341 serial_irq_ids[obj_s->index] = id;
elessair 0:f269e3021894 342 }
elessair 0:f269e3021894 343
elessair 0:f269e3021894 344 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
elessair 0:f269e3021894 345 {
elessair 0:f269e3021894 346 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 347 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 348 IRQn_Type irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 349 uint32_t vector = 0;
elessair 0:f269e3021894 350
elessair 0:f269e3021894 351 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 352 irq_n = USART1_IRQn;
elessair 0:f269e3021894 353 vector = (uint32_t)&uart1_irq;
elessair 0:f269e3021894 354 }
elessair 0:f269e3021894 355
elessair 0:f269e3021894 356 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 357 irq_n = USART2_IRQn;
elessair 0:f269e3021894 358 vector = (uint32_t)&uart2_irq;
elessair 0:f269e3021894 359 }
elessair 0:f269e3021894 360
elessair 0:f269e3021894 361 #if defined(USART3_BASE)
elessair 0:f269e3021894 362 if (obj_s->uart == UART_3) {
elessair 0:f269e3021894 363 irq_n = USART3_IRQn;
elessair 0:f269e3021894 364 vector = (uint32_t)&uart3_irq;
elessair 0:f269e3021894 365 }
elessair 0:f269e3021894 366 #endif
elessair 0:f269e3021894 367
elessair 0:f269e3021894 368 #if defined(UART4_BASE)
elessair 0:f269e3021894 369 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 370 irq_n = UART4_IRQn;
elessair 0:f269e3021894 371 vector = (uint32_t)&uart4_irq;
elessair 0:f269e3021894 372 }
elessair 0:f269e3021894 373 #endif
elessair 0:f269e3021894 374
elessair 0:f269e3021894 375 #if defined(UART5_BASE)
elessair 0:f269e3021894 376 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 377 irq_n = UART5_IRQn;
elessair 0:f269e3021894 378 vector = (uint32_t)&uart5_irq;
elessair 0:f269e3021894 379 }
elessair 0:f269e3021894 380 #endif
elessair 0:f269e3021894 381
elessair 0:f269e3021894 382 if (enable) {
elessair 0:f269e3021894 383 if (irq == RxIrq) {
elessair 0:f269e3021894 384 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 385 } else { // TxIrq
elessair 0:f269e3021894 386 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 387 }
elessair 0:f269e3021894 388 NVIC_SetVector(irq_n, vector);
elessair 0:f269e3021894 389 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 390
elessair 0:f269e3021894 391 } else { // disable
elessair 0:f269e3021894 392 int all_disabled = 0;
elessair 0:f269e3021894 393 if (irq == RxIrq) {
elessair 0:f269e3021894 394 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 395 // Check if TxIrq is disabled too
elessair 0:f269e3021894 396 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
elessair 0:f269e3021894 397 all_disabled = 1;
elessair 0:f269e3021894 398 }
elessair 0:f269e3021894 399 } else { // TxIrq
elessair 0:f269e3021894 400 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 401 // Check if RxIrq is disabled too
elessair 0:f269e3021894 402 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
elessair 0:f269e3021894 403 all_disabled = 1;
elessair 0:f269e3021894 404 }
elessair 0:f269e3021894 405 }
elessair 0:f269e3021894 406
elessair 0:f269e3021894 407 if (all_disabled) {
elessair 0:f269e3021894 408 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 409 }
elessair 0:f269e3021894 410 }
elessair 0:f269e3021894 411 }
elessair 0:f269e3021894 412
elessair 0:f269e3021894 413 /******************************************************************************
elessair 0:f269e3021894 414 * READ/WRITE
elessair 0:f269e3021894 415 ******************************************************************************/
elessair 0:f269e3021894 416
elessair 0:f269e3021894 417 int serial_getc(serial_t *obj)
elessair 0:f269e3021894 418 {
elessair 0:f269e3021894 419 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 420 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 421
elessair 0:f269e3021894 422 while (!serial_readable(obj));
elessair 0:f269e3021894 423 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 424 return (int)(huart->Instance->RDR & (uint8_t)0xFF);
elessair 0:f269e3021894 425 } else {
elessair 0:f269e3021894 426 return (int)(huart->Instance->RDR & (uint16_t)0x1FF);
elessair 0:f269e3021894 427 }
elessair 0:f269e3021894 428 }
elessair 0:f269e3021894 429
elessair 0:f269e3021894 430 void serial_putc(serial_t *obj, int c)
elessair 0:f269e3021894 431 {
elessair 0:f269e3021894 432 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 433 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 434
elessair 0:f269e3021894 435 while (!serial_writable(obj));
elessair 0:f269e3021894 436 if (obj_s->databits == UART_WORDLENGTH_8B) {
elessair 0:f269e3021894 437 huart->Instance->TDR = (uint8_t)(c & (uint8_t)0xFF);
elessair 0:f269e3021894 438 } else {
elessair 0:f269e3021894 439 huart->Instance->TDR = (uint16_t)(c & (uint16_t)0x1FF);
elessair 0:f269e3021894 440 }
elessair 0:f269e3021894 441 }
elessair 0:f269e3021894 442
elessair 0:f269e3021894 443 int serial_readable(serial_t *obj)
elessair 0:f269e3021894 444 {
elessair 0:f269e3021894 445 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 446 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 447
elessair 0:f269e3021894 448 // Check if data is received
elessair 0:f269e3021894 449 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 450 }
elessair 0:f269e3021894 451
elessair 0:f269e3021894 452 int serial_writable(serial_t *obj)
elessair 0:f269e3021894 453 {
elessair 0:f269e3021894 454 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 455 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 456
elessair 0:f269e3021894 457 // Check if data is transmitted
elessair 0:f269e3021894 458 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 459 }
elessair 0:f269e3021894 460
elessair 0:f269e3021894 461 void serial_clear(serial_t *obj)
elessair 0:f269e3021894 462 {
elessair 0:f269e3021894 463 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 464 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 465
elessair 0:f269e3021894 466 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 467 __HAL_UART_SEND_REQ(huart, UART_RXDATA_FLUSH_REQUEST);
elessair 0:f269e3021894 468 }
elessair 0:f269e3021894 469
elessair 0:f269e3021894 470 void serial_pinout_tx(PinName tx)
elessair 0:f269e3021894 471 {
elessair 0:f269e3021894 472 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 473 }
elessair 0:f269e3021894 474
elessair 0:f269e3021894 475 void serial_break_set(serial_t *obj)
elessair 0:f269e3021894 476 {
elessair 0:f269e3021894 477 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 478 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 479
elessair 0:f269e3021894 480 HAL_LIN_SendBreak(huart);
elessair 0:f269e3021894 481 }
elessair 0:f269e3021894 482
elessair 0:f269e3021894 483 void serial_break_clear(serial_t *obj)
elessair 0:f269e3021894 484 {
elessair 0:f269e3021894 485 (void)obj;
elessair 0:f269e3021894 486 }
elessair 0:f269e3021894 487
elessair 0:f269e3021894 488 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 489
elessair 0:f269e3021894 490 /******************************************************************************
elessair 0:f269e3021894 491 * LOCAL HELPER FUNCTIONS
elessair 0:f269e3021894 492 ******************************************************************************/
elessair 0:f269e3021894 493
elessair 0:f269e3021894 494 /**
elessair 0:f269e3021894 495 * Configure the TX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 496 *
elessair 0:f269e3021894 497 * @param obj The serial object.
elessair 0:f269e3021894 498 * @param tx The buffer for sending.
elessair 0:f269e3021894 499 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 500 */
elessair 0:f269e3021894 501 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
elessair 0:f269e3021894 502 {
elessair 0:f269e3021894 503 (void)width;
elessair 0:f269e3021894 504
elessair 0:f269e3021894 505 // Exit if a transmit is already on-going
elessair 0:f269e3021894 506 if (serial_tx_active(obj)) {
elessair 0:f269e3021894 507 return;
elessair 0:f269e3021894 508 }
elessair 0:f269e3021894 509
elessair 0:f269e3021894 510 obj->tx_buff.buffer = tx;
elessair 0:f269e3021894 511 obj->tx_buff.length = tx_length;
elessair 0:f269e3021894 512 obj->tx_buff.pos = 0;
elessair 0:f269e3021894 513 }
elessair 0:f269e3021894 514
elessair 0:f269e3021894 515 /**
elessair 0:f269e3021894 516 * Configure the RX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 517 *
elessair 0:f269e3021894 518 * @param obj The serial object.
elessair 0:f269e3021894 519 * @param tx The buffer for sending.
elessair 0:f269e3021894 520 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 521 */
elessair 0:f269e3021894 522 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
elessair 0:f269e3021894 523 {
elessair 0:f269e3021894 524 (void)width;
elessair 0:f269e3021894 525
elessair 0:f269e3021894 526 // Exit if a reception is already on-going
elessair 0:f269e3021894 527 if (serial_rx_active(obj)) {
elessair 0:f269e3021894 528 return;
elessair 0:f269e3021894 529 }
elessair 0:f269e3021894 530
elessair 0:f269e3021894 531 obj->rx_buff.buffer = rx;
elessair 0:f269e3021894 532 obj->rx_buff.length = rx_length;
elessair 0:f269e3021894 533 obj->rx_buff.pos = 0;
elessair 0:f269e3021894 534 }
elessair 0:f269e3021894 535
elessair 0:f269e3021894 536 /**
elessair 0:f269e3021894 537 * Configure events
elessair 0:f269e3021894 538 *
elessair 0:f269e3021894 539 * @param obj The serial object
elessair 0:f269e3021894 540 * @param event The logical OR of the events to configure
elessair 0:f269e3021894 541 * @param enable Set to non-zero to enable events, or zero to disable them
elessair 0:f269e3021894 542 */
elessair 0:f269e3021894 543 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
elessair 0:f269e3021894 544 {
elessair 0:f269e3021894 545 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 546
elessair 0:f269e3021894 547 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
elessair 0:f269e3021894 548 if (enable) {
elessair 0:f269e3021894 549 obj_s->events |= event;
elessair 0:f269e3021894 550 } else {
elessair 0:f269e3021894 551 obj_s->events &= ~event;
elessair 0:f269e3021894 552 }
elessair 0:f269e3021894 553 }
elessair 0:f269e3021894 554
elessair 0:f269e3021894 555
elessair 0:f269e3021894 556 /**
elessair 0:f269e3021894 557 * Get index of serial object TX IRQ, relating it to the physical peripheral.
elessair 0:f269e3021894 558 *
elessair 0:f269e3021894 559 * @param obj pointer to serial object
elessair 0:f269e3021894 560 * @return internal NVIC TX IRQ index of U(S)ART peripheral
elessair 0:f269e3021894 561 */
elessair 0:f269e3021894 562 static IRQn_Type serial_get_irq_n(serial_t *obj)
elessair 0:f269e3021894 563 {
elessair 0:f269e3021894 564 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 565 IRQn_Type irq_n;
elessair 0:f269e3021894 566
elessair 0:f269e3021894 567 switch (obj_s->index) {
elessair 0:f269e3021894 568 case 0:
elessair 0:f269e3021894 569 irq_n = USART1_IRQn;
elessair 0:f269e3021894 570 break;
elessair 0:f269e3021894 571
elessair 0:f269e3021894 572 case 1:
elessair 0:f269e3021894 573 irq_n = USART2_IRQn;
elessair 0:f269e3021894 574 break;
elessair 0:f269e3021894 575
elessair 0:f269e3021894 576 #if defined(USART3_BASE)
elessair 0:f269e3021894 577 case 2:
elessair 0:f269e3021894 578 irq_n = USART3_IRQn;
elessair 0:f269e3021894 579 break;
elessair 0:f269e3021894 580 #endif
elessair 0:f269e3021894 581 #if defined(USART4_BASE)
elessair 0:f269e3021894 582 case 3:
elessair 0:f269e3021894 583 irq_n = USART4_IRQn;
elessair 0:f269e3021894 584 break;
elessair 0:f269e3021894 585 #endif
elessair 0:f269e3021894 586 #if defined(USART5_BASE)
elessair 0:f269e3021894 587 case 4:
elessair 0:f269e3021894 588 irq_n = USART5_IRQn;
elessair 0:f269e3021894 589 break;
elessair 0:f269e3021894 590 #endif
elessair 0:f269e3021894 591 default:
elessair 0:f269e3021894 592 irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 593 }
elessair 0:f269e3021894 594
elessair 0:f269e3021894 595 return irq_n;
elessair 0:f269e3021894 596 }
elessair 0:f269e3021894 597
elessair 0:f269e3021894 598
elessair 0:f269e3021894 599 /******************************************************************************
elessair 0:f269e3021894 600 * MBED API FUNCTIONS
elessair 0:f269e3021894 601 ******************************************************************************/
elessair 0:f269e3021894 602
elessair 0:f269e3021894 603 /**
elessair 0:f269e3021894 604 * Begin asynchronous TX transfer. The used buffer is specified in the serial
elessair 0:f269e3021894 605 * object, tx_buff
elessair 0:f269e3021894 606 *
elessair 0:f269e3021894 607 * @param obj The serial object
elessair 0:f269e3021894 608 * @param tx The buffer for sending
elessair 0:f269e3021894 609 * @param tx_length The number of words to transmit
elessair 0:f269e3021894 610 * @param tx_width The bit width of buffer word
elessair 0:f269e3021894 611 * @param handler The serial handler
elessair 0:f269e3021894 612 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 613 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 614 * @return Returns number of data transfered, or 0 otherwise
elessair 0:f269e3021894 615 */
elessair 0:f269e3021894 616 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 617 {
elessair 0:f269e3021894 618 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 619 (void) hint;
elessair 0:f269e3021894 620
elessair 0:f269e3021894 621 // Check buffer is ok
elessair 0:f269e3021894 622 MBED_ASSERT(tx != (void*)0);
elessair 0:f269e3021894 623 MBED_ASSERT(tx_width == 8); // support only 8b width
elessair 0:f269e3021894 624
elessair 0:f269e3021894 625 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 626 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 627
elessair 0:f269e3021894 628 if (tx_length == 0) {
elessair 0:f269e3021894 629 return 0;
elessair 0:f269e3021894 630 }
elessair 0:f269e3021894 631
elessair 0:f269e3021894 632 // Set up buffer
elessair 0:f269e3021894 633 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
elessair 0:f269e3021894 634
elessair 0:f269e3021894 635 // Set up events
elessair 0:f269e3021894 636 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
elessair 0:f269e3021894 637 serial_enable_event(obj, event, 1); // Set only the wanted events
elessair 0:f269e3021894 638
elessair 0:f269e3021894 639 // Enable interrupt
elessair 0:f269e3021894 640 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 641 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 642 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 643 NVIC_SetPriority(irq_n, 1);
elessair 0:f269e3021894 644 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 645 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 646
elessair 0:f269e3021894 647 // the following function will enable UART_IT_TXE and error interrupts
elessair 0:f269e3021894 648 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
elessair 0:f269e3021894 649 return 0;
elessair 0:f269e3021894 650 }
elessair 0:f269e3021894 651
elessair 0:f269e3021894 652 return tx_length;
elessair 0:f269e3021894 653 }
elessair 0:f269e3021894 654
elessair 0:f269e3021894 655 /**
elessair 0:f269e3021894 656 * Begin asynchronous RX transfer (enable interrupt for data collecting)
elessair 0:f269e3021894 657 * The used buffer is specified in the serial object, rx_buff
elessair 0:f269e3021894 658 *
elessair 0:f269e3021894 659 * @param obj The serial object
elessair 0:f269e3021894 660 * @param rx The buffer for sending
elessair 0:f269e3021894 661 * @param rx_length The number of words to transmit
elessair 0:f269e3021894 662 * @param rx_width The bit width of buffer word
elessair 0:f269e3021894 663 * @param handler The serial handler
elessair 0:f269e3021894 664 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 665 * @param handler The serial handler
elessair 0:f269e3021894 666 * @param char_match A character in range 0-254 to be matched
elessair 0:f269e3021894 667 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 668 */
elessair 0:f269e3021894 669 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 670 {
elessair 0:f269e3021894 671 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 672 (void) hint;
elessair 0:f269e3021894 673
elessair 0:f269e3021894 674 /* Sanity check arguments */
elessair 0:f269e3021894 675 MBED_ASSERT(obj);
elessair 0:f269e3021894 676 MBED_ASSERT(rx != (void*)0);
elessair 0:f269e3021894 677 MBED_ASSERT(rx_width == 8); // support only 8b width
elessair 0:f269e3021894 678
elessair 0:f269e3021894 679 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 680 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 681
elessair 0:f269e3021894 682 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
elessair 0:f269e3021894 683 serial_enable_event(obj, event, 1);
elessair 0:f269e3021894 684
elessair 0:f269e3021894 685 // set CharMatch
elessair 0:f269e3021894 686 obj->char_match = char_match;
elessair 0:f269e3021894 687
elessair 0:f269e3021894 688 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
elessair 0:f269e3021894 689
elessair 0:f269e3021894 690 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 691 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 692 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 693 NVIC_SetPriority(irq_n, 0);
elessair 0:f269e3021894 694 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 695 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 696
elessair 0:f269e3021894 697 // following HAL function will enable the RXNE interrupt + error interrupts
elessair 0:f269e3021894 698 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
elessair 0:f269e3021894 699 }
elessair 0:f269e3021894 700
elessair 0:f269e3021894 701 /**
elessair 0:f269e3021894 702 * Attempts to determine if the serial peripheral is already in use for TX
elessair 0:f269e3021894 703 *
elessair 0:f269e3021894 704 * @param obj The serial object
elessair 0:f269e3021894 705 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 706 */
elessair 0:f269e3021894 707 uint8_t serial_tx_active(serial_t *obj)
elessair 0:f269e3021894 708 {
elessair 0:f269e3021894 709 MBED_ASSERT(obj);
elessair 0:f269e3021894 710
elessair 0:f269e3021894 711 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 712 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 713
elessair 0:f269e3021894 714 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
elessair 0:f269e3021894 715 }
elessair 0:f269e3021894 716
elessair 0:f269e3021894 717 /**
elessair 0:f269e3021894 718 * Attempts to determine if the serial peripheral is already in use for RX
elessair 0:f269e3021894 719 *
elessair 0:f269e3021894 720 * @param obj The serial object
elessair 0:f269e3021894 721 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 722 */
elessair 0:f269e3021894 723 uint8_t serial_rx_active(serial_t *obj)
elessair 0:f269e3021894 724 {
elessair 0:f269e3021894 725 MBED_ASSERT(obj);
elessair 0:f269e3021894 726
elessair 0:f269e3021894 727 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 728 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 729
elessair 0:f269e3021894 730 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
elessair 0:f269e3021894 731 }
elessair 0:f269e3021894 732
elessair 0:f269e3021894 733 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 734 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 735 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 736 }
elessair 0:f269e3021894 737 }
elessair 0:f269e3021894 738
elessair 0:f269e3021894 739 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 740 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 741 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF);
elessair 0:f269e3021894 742 }
elessair 0:f269e3021894 743 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 744 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_FEF);
elessair 0:f269e3021894 745 }
elessair 0:f269e3021894 746 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
elessair 0:f269e3021894 747 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_NEF);
elessair 0:f269e3021894 748 }
elessair 0:f269e3021894 749 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 750 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 751 }
elessair 0:f269e3021894 752 }
elessair 0:f269e3021894 753
elessair 0:f269e3021894 754 /**
elessair 0:f269e3021894 755 * The asynchronous TX and RX handler.
elessair 0:f269e3021894 756 *
elessair 0:f269e3021894 757 * @param obj The serial object
elessair 0:f269e3021894 758 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
elessair 0:f269e3021894 759 */
elessair 0:f269e3021894 760 int serial_irq_handler_asynch(serial_t *obj)
elessair 0:f269e3021894 761 {
elessair 0:f269e3021894 762 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 763 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 764
elessair 0:f269e3021894 765 volatile int return_event = 0;
elessair 0:f269e3021894 766 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
elessair 0:f269e3021894 767 uint8_t i = 0;
elessair 0:f269e3021894 768
elessair 0:f269e3021894 769 // TX PART:
elessair 0:f269e3021894 770 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 771 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 772 // Return event SERIAL_EVENT_TX_COMPLETE if requested
elessair 0:f269e3021894 773 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
elessair 0:f269e3021894 774 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 775 }
elessair 0:f269e3021894 776 }
elessair 0:f269e3021894 777 }
elessair 0:f269e3021894 778
elessair 0:f269e3021894 779 // Handle error events
elessair 0:f269e3021894 780 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 781 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 782 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
elessair 0:f269e3021894 783 }
elessair 0:f269e3021894 784 }
elessair 0:f269e3021894 785
elessair 0:f269e3021894 786 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 787 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 788 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
elessair 0:f269e3021894 789 }
elessair 0:f269e3021894 790 }
elessair 0:f269e3021894 791
elessair 0:f269e3021894 792 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 793 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 794 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
elessair 0:f269e3021894 795 }
elessair 0:f269e3021894 796 }
elessair 0:f269e3021894 797
elessair 0:f269e3021894 798 HAL_UART_IRQHandler(huart);
elessair 0:f269e3021894 799
elessair 0:f269e3021894 800 // Abort if an error occurs
elessair 0:f269e3021894 801 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
elessair 0:f269e3021894 802 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
elessair 0:f269e3021894 803 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
elessair 0:f269e3021894 804 return return_event;
elessair 0:f269e3021894 805 }
elessair 0:f269e3021894 806
elessair 0:f269e3021894 807 //RX PART
elessair 0:f269e3021894 808 if (huart->RxXferSize != 0) {
elessair 0:f269e3021894 809 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
elessair 0:f269e3021894 810 }
elessair 0:f269e3021894 811 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
elessair 0:f269e3021894 812 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 813 }
elessair 0:f269e3021894 814
elessair 0:f269e3021894 815 // Check if char_match is present
elessair 0:f269e3021894 816 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
elessair 0:f269e3021894 817 if (buf != NULL) {
elessair 0:f269e3021894 818 for (i = 0; i < obj->rx_buff.pos; i++) {
elessair 0:f269e3021894 819 if (buf[i] == obj->char_match) {
elessair 0:f269e3021894 820 obj->rx_buff.pos = i;
elessair 0:f269e3021894 821 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
elessair 0:f269e3021894 822 serial_rx_abort_asynch(obj);
elessair 0:f269e3021894 823 break;
elessair 0:f269e3021894 824 }
elessair 0:f269e3021894 825 }
elessair 0:f269e3021894 826 }
elessair 0:f269e3021894 827 }
elessair 0:f269e3021894 828
elessair 0:f269e3021894 829 return return_event;
elessair 0:f269e3021894 830 }
elessair 0:f269e3021894 831
elessair 0:f269e3021894 832 /**
elessair 0:f269e3021894 833 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elessair 0:f269e3021894 834 * flush TX hardware buffer if TX FIFO is used
elessair 0:f269e3021894 835 *
elessair 0:f269e3021894 836 * @param obj The serial object
elessair 0:f269e3021894 837 */
elessair 0:f269e3021894 838 void serial_tx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 839 {
elessair 0:f269e3021894 840 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 841 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 842
elessair 0:f269e3021894 843 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 844 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
elessair 0:f269e3021894 845
elessair 0:f269e3021894 846 // clear flags
elessair 0:f269e3021894 847 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 848
elessair 0:f269e3021894 849 // reset states
elessair 0:f269e3021894 850 huart->TxXferCount = 0;
elessair 0:f269e3021894 851 // update handle state
elessair 0:f269e3021894 852 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 853 huart->gState = HAL_UART_STATE_BUSY_RX;
elessair 0:f269e3021894 854 } else {
elessair 0:f269e3021894 855 huart->gState = HAL_UART_STATE_READY;
elessair 0:f269e3021894 856 }
elessair 0:f269e3021894 857 }
elessair 0:f269e3021894 858
elessair 0:f269e3021894 859 /**
elessair 0:f269e3021894 860 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
elessair 0:f269e3021894 861 * flush RX hardware buffer if RX FIFO is used
elessair 0:f269e3021894 862 *
elessair 0:f269e3021894 863 * @param obj The serial object
elessair 0:f269e3021894 864 */
elessair 0:f269e3021894 865 void serial_rx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 866 {
elessair 0:f269e3021894 867 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 868 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 869
elessair 0:f269e3021894 870 // disable interrupts
elessair 0:f269e3021894 871 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 872 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
elessair 0:f269e3021894 873 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
elessair 0:f269e3021894 874
elessair 0:f269e3021894 875 // clear flags
elessair 0:f269e3021894 876 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF | UART_CLEAR_FEF | UART_CLEAR_OREF);
elessair 0:f269e3021894 877 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 878
elessair 0:f269e3021894 879 // reset states
elessair 0:f269e3021894 880 huart->RxXferCount = 0;
elessair 0:f269e3021894 881 // update handle state
elessair 0:f269e3021894 882 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 883 huart->RxState = HAL_UART_STATE_BUSY_TX;
elessair 0:f269e3021894 884 } else {
elessair 0:f269e3021894 885 huart->RxState = HAL_UART_STATE_READY;
elessair 0:f269e3021894 886 }
elessair 0:f269e3021894 887 }
elessair 0:f269e3021894 888
elessair 0:f269e3021894 889 #endif
elessair 0:f269e3021894 890
elessair 0:f269e3021894 891 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 892
elessair 0:f269e3021894 893 /**
elessair 0:f269e3021894 894 * Set HW Control Flow
elessair 0:f269e3021894 895 * @param obj The serial object
elessair 0:f269e3021894 896 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
elessair 0:f269e3021894 897 * @param rxflow Pin for the rxflow
elessair 0:f269e3021894 898 * @param txflow Pin for the txflow
elessair 0:f269e3021894 899 */
elessair 0:f269e3021894 900 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
elessair 0:f269e3021894 901 {
elessair 0:f269e3021894 902 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 903
elessair 0:f269e3021894 904 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 905 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 906 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 907
elessair 0:f269e3021894 908 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 909 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
elessair 0:f269e3021894 910 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 911
elessair 0:f269e3021894 912 if(type == FlowControlNone) {
elessair 0:f269e3021894 913 // Disable hardware flow control
elessair 0:f269e3021894 914 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 915 }
elessair 0:f269e3021894 916 if (type == FlowControlRTS) {
elessair 0:f269e3021894 917 // Enable RTS
elessair 0:f269e3021894 918 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 919 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
elessair 0:f269e3021894 920 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 921 // Enable the pin for RTS function
elessair 0:f269e3021894 922 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 923 }
elessair 0:f269e3021894 924 if (type == FlowControlCTS) {
elessair 0:f269e3021894 925 // Enable CTS
elessair 0:f269e3021894 926 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 927 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
elessair 0:f269e3021894 928 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 929 // Enable the pin for CTS function
elessair 0:f269e3021894 930 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 931 }
elessair 0:f269e3021894 932 if (type == FlowControlRTSCTS) {
elessair 0:f269e3021894 933 // Enable CTS & RTS
elessair 0:f269e3021894 934 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 935 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 936 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
elessair 0:f269e3021894 937 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 938 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 939 // Enable the pin for CTS function
elessair 0:f269e3021894 940 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 941 // Enable the pin for RTS function
elessair 0:f269e3021894 942 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 943 }
elessair 0:f269e3021894 944
elessair 0:f269e3021894 945 init_uart(obj);
elessair 0:f269e3021894 946 }
elessair 0:f269e3021894 947
elessair 0:f269e3021894 948 #endif
elessair 0:f269e3021894 949
elessair 0:f269e3021894 950 #endif