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_STM32L0/serial_api.c@0:f269e3021894, 2016-10-23 (annotated)

Committer:
elessair
Date:
Sun Oct 23 15:10:02 2016 +0000
Revision:
0:f269e3021894
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1 /* mbed Microcontroller Library
elessair 0:f269e3021894 2 *******************************************************************************
elessair 0:f269e3021894 3 * Copyright (c) 2015, STMicroelectronics
elessair 0:f269e3021894 4 * All rights reserved.
elessair 0:f269e3021894 5 *
elessair 0:f269e3021894 6 * Redistribution and use in source and binary forms, with or without
elessair 0:f269e3021894 7 * modification, are permitted provided that the following conditions are met:
elessair 0:f269e3021894 8 *
elessair 0:f269e3021894 9 * 1. Redistributions of source code must retain the above copyright notice,
elessair 0:f269e3021894 10 * this list of conditions and the following disclaimer.
elessair 0:f269e3021894 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
elessair 0:f269e3021894 12 * this list of conditions and the following disclaimer in the documentation
elessair 0:f269e3021894 13 * and/or other materials provided with the distribution.
elessair 0:f269e3021894 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
elessair 0:f269e3021894 15 * may be used to endorse or promote products derived from this software
elessair 0:f269e3021894 16 * without specific prior written permission.
elessair 0:f269e3021894 17 *
elessair 0:f269e3021894 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
elessair 0:f269e3021894 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
elessair 0:f269e3021894 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
elessair 0:f269e3021894 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
elessair 0:f269e3021894 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
elessair 0:f269e3021894 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
elessair 0:f269e3021894 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
elessair 0:f269e3021894 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
elessair 0:f269e3021894 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
elessair 0:f269e3021894 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
elessair 0:f269e3021894 28 *******************************************************************************
elessair 0:f269e3021894 29 */
elessair 0:f269e3021894 30 #include "mbed_assert.h"
elessair 0:f269e3021894 31 #include "serial_api.h"
elessair 0:f269e3021894 32
elessair 0:f269e3021894 33 #if DEVICE_SERIAL
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 #include "cmsis.h"
elessair 0:f269e3021894 36 #include "pinmap.h"
elessair 0:f269e3021894 37 #include <string.h>
elessair 0:f269e3021894 38 #include "PeripheralPins.h"
elessair 0:f269e3021894 39 #include "mbed_error.h"
elessair 0:f269e3021894 40
elessair 0:f269e3021894 41 #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 huart->Init.Parity = obj_s->parity;
elessair 0:f269e3021894 68 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 69 huart->Init.HwFlowCtl = obj_s->hw_flow_ctl;
elessair 0:f269e3021894 70 #else
elessair 0:f269e3021894 71 huart->Init.HwFlowCtl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 72 #endif
elessair 0:f269e3021894 73 huart->TxXferCount = 0;
elessair 0:f269e3021894 74 huart->TxXferSize = 0;
elessair 0:f269e3021894 75 huart->RxXferCount = 0;
elessair 0:f269e3021894 76 huart->RxXferSize = 0;
elessair 0:f269e3021894 77
elessair 0:f269e3021894 78 if (obj_s->pin_rx == NC) {
elessair 0:f269e3021894 79 huart->Init.Mode = UART_MODE_TX;
elessair 0:f269e3021894 80 } else if (obj_s->pin_tx == NC) {
elessair 0:f269e3021894 81 huart->Init.Mode = UART_MODE_RX;
elessair 0:f269e3021894 82 } else {
elessair 0:f269e3021894 83 huart->Init.Mode = UART_MODE_TX_RX;
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 UART clock
elessair 0:f269e3021894 104 #if defined(USART1_BASE)
elessair 0:f269e3021894 105 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 106 __HAL_RCC_USART1_FORCE_RESET();
elessair 0:f269e3021894 107 __HAL_RCC_USART1_RELEASE_RESET();
elessair 0:f269e3021894 108 __HAL_RCC_USART1_CLK_ENABLE();
elessair 0:f269e3021894 109 obj_s->index = 0;
elessair 0:f269e3021894 110 }
elessair 0:f269e3021894 111 #endif
elessair 0:f269e3021894 112
elessair 0:f269e3021894 113 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 114 __HAL_RCC_USART2_FORCE_RESET();
elessair 0:f269e3021894 115 __HAL_RCC_USART2_RELEASE_RESET();
elessair 0:f269e3021894 116 __HAL_RCC_USART2_CLK_ENABLE();
elessair 0:f269e3021894 117 obj_s->index = 1;
elessair 0:f269e3021894 118 }
elessair 0:f269e3021894 119
elessair 0:f269e3021894 120 if (obj_s->uart == LPUART_1) {
elessair 0:f269e3021894 121 __HAL_RCC_LPUART1_FORCE_RESET();
elessair 0:f269e3021894 122 __HAL_RCC_LPUART1_RELEASE_RESET();
elessair 0:f269e3021894 123 __HAL_RCC_LPUART1_CLK_ENABLE();
elessair 0:f269e3021894 124 obj_s->index = 2;
elessair 0:f269e3021894 125 }
elessair 0:f269e3021894 126
elessair 0:f269e3021894 127 #if defined(USART4_BASE)
elessair 0:f269e3021894 128 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 129 __HAL_RCC_USART4_FORCE_RESET();
elessair 0:f269e3021894 130 __HAL_RCC_USART4_RELEASE_RESET();
elessair 0:f269e3021894 131 __HAL_RCC_USART4_CLK_ENABLE();
elessair 0:f269e3021894 132 obj_s->index = 3;
elessair 0:f269e3021894 133 }
elessair 0:f269e3021894 134 #endif
elessair 0:f269e3021894 135
elessair 0:f269e3021894 136 #if defined(USART5_BASE)
elessair 0:f269e3021894 137 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 138 __HAL_RCC_USART5_FORCE_RESET();
elessair 0:f269e3021894 139 __HAL_RCC_USART5_RELEASE_RESET();
elessair 0:f269e3021894 140 __HAL_RCC_USART5_CLK_ENABLE();
elessair 0:f269e3021894 141 obj_s->index = 4;
elessair 0:f269e3021894 142 }
elessair 0:f269e3021894 143 #endif
elessair 0:f269e3021894 144
elessair 0:f269e3021894 145 // Configure the UART pins
elessair 0:f269e3021894 146 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 147 pinmap_pinout(rx, PinMap_UART_RX);
elessair 0:f269e3021894 148
elessair 0:f269e3021894 149 if (tx != NC) {
elessair 0:f269e3021894 150 pin_mode(tx, PullUp);
elessair 0:f269e3021894 151 }
elessair 0:f269e3021894 152 if (rx != NC) {
elessair 0:f269e3021894 153 pin_mode(rx, PullUp);
elessair 0:f269e3021894 154 }
elessair 0:f269e3021894 155
elessair 0:f269e3021894 156 // Configure UART
elessair 0:f269e3021894 157 obj_s->baudrate = 9600;
elessair 0:f269e3021894 158 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 159 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 160 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 161
elessair 0:f269e3021894 162 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 163 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 164 #endif
elessair 0:f269e3021894 165
elessair 0:f269e3021894 166 obj_s->pin_tx = tx;
elessair 0:f269e3021894 167 obj_s->pin_rx = rx;
elessair 0:f269e3021894 168
elessair 0:f269e3021894 169 init_uart(obj);
elessair 0:f269e3021894 170
elessair 0:f269e3021894 171 // For stdio management
elessair 0:f269e3021894 172 if (obj_s->uart == STDIO_UART) {
elessair 0:f269e3021894 173 stdio_uart_inited = 1;
elessair 0:f269e3021894 174 memcpy(&stdio_uart, obj, sizeof(serial_t));
elessair 0:f269e3021894 175 }
elessair 0:f269e3021894 176 }
elessair 0:f269e3021894 177
elessair 0:f269e3021894 178 void serial_free(serial_t *obj)
elessair 0:f269e3021894 179 {
elessair 0:f269e3021894 180 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 181
elessair 0:f269e3021894 182 // Reset UART and disable clock
elessair 0:f269e3021894 183 #if defined(USART1_BASE)
elessair 0:f269e3021894 184 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 185 __HAL_RCC_USART1_FORCE_RESET();
elessair 0:f269e3021894 186 __HAL_RCC_USART1_RELEASE_RESET();
elessair 0:f269e3021894 187 __HAL_RCC_USART1_CLK_DISABLE();
elessair 0:f269e3021894 188 }
elessair 0:f269e3021894 189 #endif
elessair 0:f269e3021894 190
elessair 0:f269e3021894 191 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 192 __HAL_RCC_USART2_FORCE_RESET();
elessair 0:f269e3021894 193 __HAL_RCC_USART2_RELEASE_RESET();
elessair 0:f269e3021894 194 __HAL_RCC_USART2_CLK_DISABLE();
elessair 0:f269e3021894 195 }
elessair 0:f269e3021894 196
elessair 0:f269e3021894 197 if (obj_s->uart == LPUART_1) {
elessair 0:f269e3021894 198 __HAL_RCC_LPUART1_FORCE_RESET();
elessair 0:f269e3021894 199 __HAL_RCC_LPUART1_RELEASE_RESET();
elessair 0:f269e3021894 200 __HAL_RCC_LPUART1_CLK_DISABLE();
elessair 0:f269e3021894 201 }
elessair 0:f269e3021894 202
elessair 0:f269e3021894 203 #if defined(USART4_BASE)
elessair 0:f269e3021894 204 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 205 __HAL_RCC_USART4_FORCE_RESET();
elessair 0:f269e3021894 206 __HAL_RCC_USART4_RELEASE_RESET();
elessair 0:f269e3021894 207 __HAL_RCC_USART4_CLK_DISABLE();
elessair 0:f269e3021894 208 }
elessair 0:f269e3021894 209 #endif
elessair 0:f269e3021894 210
elessair 0:f269e3021894 211 #if defined(USART5_BASE)
elessair 0:f269e3021894 212 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 213 __HAL_RCC_USART5_FORCE_RESET();
elessair 0:f269e3021894 214 __HAL_RCC_USART5_RELEASE_RESET();
elessair 0:f269e3021894 215 __HAL_RCC_USART5_CLK_DISABLE();
elessair 0:f269e3021894 216 }
elessair 0:f269e3021894 217 #endif
elessair 0:f269e3021894 218
elessair 0:f269e3021894 219 // Configure GPIOs
elessair 0:f269e3021894 220 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 221 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
elessair 0:f269e3021894 222
elessair 0:f269e3021894 223 serial_irq_ids[obj_s->index] = 0;
elessair 0:f269e3021894 224 }
elessair 0:f269e3021894 225
elessair 0:f269e3021894 226 void serial_baud(serial_t *obj, int baudrate)
elessair 0:f269e3021894 227 {
elessair 0:f269e3021894 228 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 229
elessair 0:f269e3021894 230 obj_s->baudrate = baudrate;
elessair 0:f269e3021894 231 init_uart(obj);
elessair 0:f269e3021894 232 }
elessair 0:f269e3021894 233
elessair 0:f269e3021894 234 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
elessair 0:f269e3021894 235 {
elessair 0:f269e3021894 236 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 237
elessair 0:f269e3021894 238 if (data_bits == 9) {
elessair 0:f269e3021894 239 obj_s->databits = UART_WORDLENGTH_9B;
elessair 0:f269e3021894 240 } else {
elessair 0:f269e3021894 241 obj_s->databits = UART_WORDLENGTH_8B;
elessair 0:f269e3021894 242 }
elessair 0:f269e3021894 243
elessair 0:f269e3021894 244 switch (parity) {
elessair 0:f269e3021894 245 case ParityOdd:
elessair 0:f269e3021894 246 obj_s->parity = UART_PARITY_ODD;
elessair 0:f269e3021894 247 break;
elessair 0:f269e3021894 248 case ParityEven:
elessair 0:f269e3021894 249 obj_s->parity = UART_PARITY_EVEN;
elessair 0:f269e3021894 250 break;
elessair 0:f269e3021894 251 default: // ParityNone
elessair 0:f269e3021894 252 case ParityForced0: // unsupported!
elessair 0:f269e3021894 253 case ParityForced1: // unsupported!
elessair 0:f269e3021894 254 obj_s->parity = UART_PARITY_NONE;
elessair 0:f269e3021894 255 break;
elessair 0:f269e3021894 256 }
elessair 0:f269e3021894 257
elessair 0:f269e3021894 258 if (stop_bits == 2) {
elessair 0:f269e3021894 259 obj_s->stopbits = UART_STOPBITS_2;
elessair 0:f269e3021894 260 } else {
elessair 0:f269e3021894 261 obj_s->stopbits = UART_STOPBITS_1;
elessair 0:f269e3021894 262 }
elessair 0:f269e3021894 263
elessair 0:f269e3021894 264 init_uart(obj);
elessair 0:f269e3021894 265 }
elessair 0:f269e3021894 266
elessair 0:f269e3021894 267 /******************************************************************************
elessair 0:f269e3021894 268 * INTERRUPTS HANDLING
elessair 0:f269e3021894 269 ******************************************************************************/
elessair 0:f269e3021894 270
elessair 0:f269e3021894 271 static void uart_irq(int id)
elessair 0:f269e3021894 272 {
elessair 0:f269e3021894 273 UART_HandleTypeDef * huart = &uart_handlers[id];
elessair 0:f269e3021894 274
elessair 0:f269e3021894 275 if (serial_irq_ids[id] != 0) {
elessair 0:f269e3021894 276 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 277 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 278 irq_handler(serial_irq_ids[id], TxIrq);
elessair 0:f269e3021894 279 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 280 }
elessair 0:f269e3021894 281 }
elessair 0:f269e3021894 282 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
elessair 0:f269e3021894 283 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_RXNE) != RESET) {
elessair 0:f269e3021894 284 irq_handler(serial_irq_ids[id], RxIrq);
elessair 0:f269e3021894 285 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 286 }
elessair 0:f269e3021894 287 }
elessair 0:f269e3021894 288 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 289 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_ORE) != RESET) {
elessair 0:f269e3021894 290 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 291 }
elessair 0:f269e3021894 292 }
elessair 0:f269e3021894 293 }
elessair 0:f269e3021894 294 }
elessair 0:f269e3021894 295
elessair 0:f269e3021894 296 #if defined(USART1_BASE)
elessair 0:f269e3021894 297 static void uart1_irq(void)
elessair 0:f269e3021894 298 {
elessair 0:f269e3021894 299 uart_irq(0);
elessair 0:f269e3021894 300 }
elessair 0:f269e3021894 301 #endif
elessair 0:f269e3021894 302
elessair 0:f269e3021894 303 static void uart2_irq(void)
elessair 0:f269e3021894 304 {
elessair 0:f269e3021894 305 uart_irq(1);
elessair 0:f269e3021894 306 }
elessair 0:f269e3021894 307
elessair 0:f269e3021894 308 static void lpuart1_irq(void)
elessair 0:f269e3021894 309 {
elessair 0:f269e3021894 310 uart_irq(2);
elessair 0:f269e3021894 311 }
elessair 0:f269e3021894 312
elessair 0:f269e3021894 313 #if defined(USART4_BASE)
elessair 0:f269e3021894 314 static void uart4_irq(void)
elessair 0:f269e3021894 315 {
elessair 0:f269e3021894 316 uart_irq(3);
elessair 0:f269e3021894 317 }
elessair 0:f269e3021894 318 #endif
elessair 0:f269e3021894 319
elessair 0:f269e3021894 320 #if defined(USART5_BASE)
elessair 0:f269e3021894 321 static void uart5_irq(void)
elessair 0:f269e3021894 322 {
elessair 0:f269e3021894 323 uart_irq(4);
elessair 0:f269e3021894 324 }
elessair 0:f269e3021894 325 #endif
elessair 0:f269e3021894 326
elessair 0:f269e3021894 327 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
elessair 0:f269e3021894 328 {
elessair 0:f269e3021894 329 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 330
elessair 0:f269e3021894 331 irq_handler = handler;
elessair 0:f269e3021894 332 serial_irq_ids[obj_s->index] = id;
elessair 0:f269e3021894 333 }
elessair 0:f269e3021894 334
elessair 0:f269e3021894 335 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
elessair 0:f269e3021894 336 {
elessair 0:f269e3021894 337 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 338 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 339 IRQn_Type irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 340 uint32_t vector = 0;
elessair 0:f269e3021894 341
elessair 0:f269e3021894 342 #if defined(USART1_BASE)
elessair 0:f269e3021894 343 if (obj_s->uart == UART_1) {
elessair 0:f269e3021894 344 irq_n = USART1_IRQn;
elessair 0:f269e3021894 345 vector = (uint32_t)&uart1_irq;
elessair 0:f269e3021894 346 }
elessair 0:f269e3021894 347 #endif
elessair 0:f269e3021894 348
elessair 0:f269e3021894 349 if (obj_s->uart == UART_2) {
elessair 0:f269e3021894 350 irq_n = USART2_IRQn;
elessair 0:f269e3021894 351 vector = (uint32_t)&uart2_irq;
elessair 0:f269e3021894 352 }
elessair 0:f269e3021894 353
elessair 0:f269e3021894 354 if (obj_s->uart == LPUART_1) {
elessair 0:f269e3021894 355 irq_n = RNG_LPUART1_IRQn;
elessair 0:f269e3021894 356 vector = (uint32_t)&lpuart1_irq;
elessair 0:f269e3021894 357 }
elessair 0:f269e3021894 358
elessair 0:f269e3021894 359 #if defined(USART4_BASE)
elessair 0:f269e3021894 360 if (obj_s->uart == UART_4) {
elessair 0:f269e3021894 361 irq_n = USART4_5_IRQn;
elessair 0:f269e3021894 362 vector = (uint32_t)&uart4_irq;
elessair 0:f269e3021894 363 }
elessair 0:f269e3021894 364 #endif
elessair 0:f269e3021894 365
elessair 0:f269e3021894 366 #if defined(USART5_BASE)
elessair 0:f269e3021894 367 if (obj_s->uart == UART_5) {
elessair 0:f269e3021894 368 irq_n = USART4_5_IRQn;
elessair 0:f269e3021894 369 vector = (uint32_t)&uart5_irq;
elessair 0:f269e3021894 370 }
elessair 0:f269e3021894 371 #endif
elessair 0:f269e3021894 372
elessair 0:f269e3021894 373 if (enable) {
elessair 0:f269e3021894 374 if (irq == RxIrq) {
elessair 0:f269e3021894 375 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 376 } else { // TxIrq
elessair 0:f269e3021894 377 __HAL_UART_ENABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 378 }
elessair 0:f269e3021894 379 NVIC_SetVector(irq_n, vector);
elessair 0:f269e3021894 380 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 381
elessair 0:f269e3021894 382 } else { // disable
elessair 0:f269e3021894 383 int all_disabled = 0;
elessair 0:f269e3021894 384 if (irq == RxIrq) {
elessair 0:f269e3021894 385 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 386 // Check if TxIrq is disabled too
elessair 0:f269e3021894 387 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
elessair 0:f269e3021894 388 all_disabled = 1;
elessair 0:f269e3021894 389 }
elessair 0:f269e3021894 390 } else { // TxIrq
elessair 0:f269e3021894 391 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 392 // Check if RxIrq is disabled too
elessair 0:f269e3021894 393 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
elessair 0:f269e3021894 394 all_disabled = 1;
elessair 0:f269e3021894 395 }
elessair 0:f269e3021894 396 }
elessair 0:f269e3021894 397
elessair 0:f269e3021894 398 if (all_disabled) {
elessair 0:f269e3021894 399 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 400 }
elessair 0:f269e3021894 401 }
elessair 0:f269e3021894 402 }
elessair 0:f269e3021894 403
elessair 0:f269e3021894 404 /******************************************************************************
elessair 0:f269e3021894 405 * READ/WRITE
elessair 0:f269e3021894 406 ******************************************************************************/
elessair 0:f269e3021894 407
elessair 0:f269e3021894 408 int serial_getc(serial_t *obj)
elessair 0:f269e3021894 409 {
elessair 0:f269e3021894 410 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 411 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 412
elessair 0:f269e3021894 413 while (!serial_readable(obj));
elessair 0:f269e3021894 414 return (int)(huart->Instance->RDR & (uint16_t)0xFF);
elessair 0:f269e3021894 415 }
elessair 0:f269e3021894 416
elessair 0:f269e3021894 417 void serial_putc(serial_t *obj, int c)
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_writable(obj));
elessair 0:f269e3021894 423 huart->Instance->TDR = (uint32_t)(c & (uint16_t)0xFF);
elessair 0:f269e3021894 424 }
elessair 0:f269e3021894 425
elessair 0:f269e3021894 426 int serial_readable(serial_t *obj)
elessair 0:f269e3021894 427 {
elessair 0:f269e3021894 428 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 429 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 430
elessair 0:f269e3021894 431 // Check if data is received
elessair 0:f269e3021894 432 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 433 }
elessair 0:f269e3021894 434
elessair 0:f269e3021894 435 int serial_writable(serial_t *obj)
elessair 0:f269e3021894 436 {
elessair 0:f269e3021894 437 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 438 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 439
elessair 0:f269e3021894 440 // Check if data is transmitted
elessair 0:f269e3021894 441 return (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) ? 1 : 0;
elessair 0:f269e3021894 442 }
elessair 0:f269e3021894 443
elessair 0:f269e3021894 444 void serial_clear(serial_t *obj)
elessair 0:f269e3021894 445 {
elessair 0:f269e3021894 446 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 447 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 448
elessair 0:f269e3021894 449 huart->TxXferCount = 0;
elessair 0:f269e3021894 450 huart->RxXferCount = 0;
elessair 0:f269e3021894 451 }
elessair 0:f269e3021894 452
elessair 0:f269e3021894 453 void serial_pinout_tx(PinName tx)
elessair 0:f269e3021894 454 {
elessair 0:f269e3021894 455 pinmap_pinout(tx, PinMap_UART_TX);
elessair 0:f269e3021894 456 }
elessair 0:f269e3021894 457
elessair 0:f269e3021894 458 void serial_break_set(serial_t *obj)
elessair 0:f269e3021894 459 {
elessair 0:f269e3021894 460 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 461 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 462
elessair 0:f269e3021894 463 __HAL_UART_SEND_REQ(huart, UART_SENDBREAK_REQUEST);
elessair 0:f269e3021894 464 }
elessair 0:f269e3021894 465
elessair 0:f269e3021894 466 void serial_break_clear(serial_t *obj)
elessair 0:f269e3021894 467 {
elessair 0:f269e3021894 468 (void)obj;
elessair 0:f269e3021894 469 }
elessair 0:f269e3021894 470
elessair 0:f269e3021894 471 #if DEVICE_SERIAL_ASYNCH
elessair 0:f269e3021894 472
elessair 0:f269e3021894 473 /******************************************************************************
elessair 0:f269e3021894 474 * LOCAL HELPER FUNCTIONS
elessair 0:f269e3021894 475 ******************************************************************************/
elessair 0:f269e3021894 476
elessair 0:f269e3021894 477 /**
elessair 0:f269e3021894 478 * Configure the TX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 479 *
elessair 0:f269e3021894 480 * @param obj The serial object.
elessair 0:f269e3021894 481 * @param tx The buffer for sending.
elessair 0:f269e3021894 482 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 483 */
elessair 0:f269e3021894 484 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
elessair 0:f269e3021894 485 {
elessair 0:f269e3021894 486 (void)width;
elessair 0:f269e3021894 487
elessair 0:f269e3021894 488 // Exit if a transmit is already on-going
elessair 0:f269e3021894 489 if (serial_tx_active(obj)) {
elessair 0:f269e3021894 490 return;
elessair 0:f269e3021894 491 }
elessair 0:f269e3021894 492
elessair 0:f269e3021894 493 obj->tx_buff.buffer = tx;
elessair 0:f269e3021894 494 obj->tx_buff.length = tx_length;
elessair 0:f269e3021894 495 obj->tx_buff.pos = 0;
elessair 0:f269e3021894 496 }
elessair 0:f269e3021894 497
elessair 0:f269e3021894 498 /**
elessair 0:f269e3021894 499 * Configure the RX buffer for an asynchronous write serial transaction
elessair 0:f269e3021894 500 *
elessair 0:f269e3021894 501 * @param obj The serial object.
elessair 0:f269e3021894 502 * @param tx The buffer for sending.
elessair 0:f269e3021894 503 * @param tx_length The number of words to transmit.
elessair 0:f269e3021894 504 */
elessair 0:f269e3021894 505 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
elessair 0:f269e3021894 506 {
elessair 0:f269e3021894 507 (void)width;
elessair 0:f269e3021894 508
elessair 0:f269e3021894 509 // Exit if a reception is already on-going
elessair 0:f269e3021894 510 if (serial_rx_active(obj)) {
elessair 0:f269e3021894 511 return;
elessair 0:f269e3021894 512 }
elessair 0:f269e3021894 513
elessair 0:f269e3021894 514 obj->rx_buff.buffer = rx;
elessair 0:f269e3021894 515 obj->rx_buff.length = rx_length;
elessair 0:f269e3021894 516 obj->rx_buff.pos = 0;
elessair 0:f269e3021894 517 }
elessair 0:f269e3021894 518
elessair 0:f269e3021894 519 /**
elessair 0:f269e3021894 520 * Configure events
elessair 0:f269e3021894 521 *
elessair 0:f269e3021894 522 * @param obj The serial object
elessair 0:f269e3021894 523 * @param event The logical OR of the events to configure
elessair 0:f269e3021894 524 * @param enable Set to non-zero to enable events, or zero to disable them
elessair 0:f269e3021894 525 */
elessair 0:f269e3021894 526 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
elessair 0:f269e3021894 527 {
elessair 0:f269e3021894 528 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 529
elessair 0:f269e3021894 530 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
elessair 0:f269e3021894 531 if (enable) {
elessair 0:f269e3021894 532 obj_s->events |= event;
elessair 0:f269e3021894 533 } else {
elessair 0:f269e3021894 534 obj_s->events &= ~event;
elessair 0:f269e3021894 535 }
elessair 0:f269e3021894 536 }
elessair 0:f269e3021894 537
elessair 0:f269e3021894 538
elessair 0:f269e3021894 539 /**
elessair 0:f269e3021894 540 * Get index of serial object TX IRQ, relating it to the physical peripheral.
elessair 0:f269e3021894 541 *
elessair 0:f269e3021894 542 * @param obj pointer to serial object
elessair 0:f269e3021894 543 * @return internal NVIC TX IRQ index of U(S)ART peripheral
elessair 0:f269e3021894 544 */
elessair 0:f269e3021894 545 static IRQn_Type serial_get_irq_n(serial_t *obj)
elessair 0:f269e3021894 546 {
elessair 0:f269e3021894 547 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 548 IRQn_Type irq_n;
elessair 0:f269e3021894 549
elessair 0:f269e3021894 550 switch (obj_s->index) {
elessair 0:f269e3021894 551 #if defined(USART1_BASE)
elessair 0:f269e3021894 552 case 0:
elessair 0:f269e3021894 553 irq_n = USART1_IRQn;
elessair 0:f269e3021894 554 break;
elessair 0:f269e3021894 555 #endif
elessair 0:f269e3021894 556 case 1:
elessair 0:f269e3021894 557 irq_n = USART2_IRQn;
elessair 0:f269e3021894 558 break;
elessair 0:f269e3021894 559
elessair 0:f269e3021894 560 case 2:
elessair 0:f269e3021894 561 irq_n = RNG_LPUART1_IRQn;
elessair 0:f269e3021894 562 break;
elessair 0:f269e3021894 563 #if defined(USART4_BASE)
elessair 0:f269e3021894 564 case 3:
elessair 0:f269e3021894 565 irq_n = USART4_5_IRQn;
elessair 0:f269e3021894 566 break;
elessair 0:f269e3021894 567 #endif
elessair 0:f269e3021894 568 #if defined(USART5_BASE)
elessair 0:f269e3021894 569 case 4:
elessair 0:f269e3021894 570 irq_n = USART4_5_IRQn;
elessair 0:f269e3021894 571 break;
elessair 0:f269e3021894 572 #endif
elessair 0:f269e3021894 573 default:
elessair 0:f269e3021894 574 irq_n = (IRQn_Type)0;
elessair 0:f269e3021894 575 }
elessair 0:f269e3021894 576
elessair 0:f269e3021894 577 return irq_n;
elessair 0:f269e3021894 578 }
elessair 0:f269e3021894 579
elessair 0:f269e3021894 580
elessair 0:f269e3021894 581 /******************************************************************************
elessair 0:f269e3021894 582 * MBED API FUNCTIONS
elessair 0:f269e3021894 583 ******************************************************************************/
elessair 0:f269e3021894 584
elessair 0:f269e3021894 585 /**
elessair 0:f269e3021894 586 * Begin asynchronous TX transfer. The used buffer is specified in the serial
elessair 0:f269e3021894 587 * object, tx_buff
elessair 0:f269e3021894 588 *
elessair 0:f269e3021894 589 * @param obj The serial object
elessair 0:f269e3021894 590 * @param tx The buffer for sending
elessair 0:f269e3021894 591 * @param tx_length The number of words to transmit
elessair 0:f269e3021894 592 * @param tx_width The bit width of buffer word
elessair 0:f269e3021894 593 * @param handler The serial handler
elessair 0:f269e3021894 594 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 595 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 596 * @return Returns number of data transfered, or 0 otherwise
elessair 0:f269e3021894 597 */
elessair 0:f269e3021894 598 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 599 {
elessair 0:f269e3021894 600 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 601 (void) hint;
elessair 0:f269e3021894 602
elessair 0:f269e3021894 603 // Check buffer is ok
elessair 0:f269e3021894 604 MBED_ASSERT(tx != (void*)0);
elessair 0:f269e3021894 605 MBED_ASSERT(tx_width == 8); // support only 8b width
elessair 0:f269e3021894 606
elessair 0:f269e3021894 607 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 608 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 609
elessair 0:f269e3021894 610 if (tx_length == 0) {
elessair 0:f269e3021894 611 return 0;
elessair 0:f269e3021894 612 }
elessair 0:f269e3021894 613
elessair 0:f269e3021894 614 // Set up buffer
elessair 0:f269e3021894 615 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
elessair 0:f269e3021894 616
elessair 0:f269e3021894 617 // Set up events
elessair 0:f269e3021894 618 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
elessair 0:f269e3021894 619 serial_enable_event(obj, event, 1); // Set only the wanted events
elessair 0:f269e3021894 620
elessair 0:f269e3021894 621 // Enable interrupt
elessair 0:f269e3021894 622 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 623 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 624 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 625 NVIC_SetPriority(irq_n, 1);
elessair 0:f269e3021894 626 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 627 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 628
elessair 0:f269e3021894 629 // the following function will enable UART_IT_TXE and error interrupts
elessair 0:f269e3021894 630 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
elessair 0:f269e3021894 631 return 0;
elessair 0:f269e3021894 632 }
elessair 0:f269e3021894 633
elessair 0:f269e3021894 634 return tx_length;
elessair 0:f269e3021894 635 }
elessair 0:f269e3021894 636
elessair 0:f269e3021894 637 /**
elessair 0:f269e3021894 638 * Begin asynchronous RX transfer (enable interrupt for data collecting)
elessair 0:f269e3021894 639 * The used buffer is specified in the serial object, rx_buff
elessair 0:f269e3021894 640 *
elessair 0:f269e3021894 641 * @param obj The serial object
elessair 0:f269e3021894 642 * @param rx The buffer for sending
elessair 0:f269e3021894 643 * @param rx_length The number of words to transmit
elessair 0:f269e3021894 644 * @param rx_width The bit width of buffer word
elessair 0:f269e3021894 645 * @param handler The serial handler
elessair 0:f269e3021894 646 * @param event The logical OR of events to be registered
elessair 0:f269e3021894 647 * @param handler The serial handler
elessair 0:f269e3021894 648 * @param char_match A character in range 0-254 to be matched
elessair 0:f269e3021894 649 * @param hint A suggestion for how to use DMA with this transfer
elessair 0:f269e3021894 650 */
elessair 0:f269e3021894 651 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 652 {
elessair 0:f269e3021894 653 // TODO: DMA usage is currently ignored
elessair 0:f269e3021894 654 (void) hint;
elessair 0:f269e3021894 655
elessair 0:f269e3021894 656 /* Sanity check arguments */
elessair 0:f269e3021894 657 MBED_ASSERT(obj);
elessair 0:f269e3021894 658 MBED_ASSERT(rx != (void*)0);
elessair 0:f269e3021894 659 MBED_ASSERT(rx_width == 8); // support only 8b width
elessair 0:f269e3021894 660
elessair 0:f269e3021894 661 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 662 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 663
elessair 0:f269e3021894 664 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
elessair 0:f269e3021894 665 serial_enable_event(obj, event, 1);
elessair 0:f269e3021894 666
elessair 0:f269e3021894 667 // set CharMatch
elessair 0:f269e3021894 668 obj->char_match = char_match;
elessair 0:f269e3021894 669
elessair 0:f269e3021894 670 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
elessair 0:f269e3021894 671
elessair 0:f269e3021894 672 IRQn_Type irq_n = serial_get_irq_n(obj);
elessair 0:f269e3021894 673 NVIC_ClearPendingIRQ(irq_n);
elessair 0:f269e3021894 674 NVIC_DisableIRQ(irq_n);
elessair 0:f269e3021894 675 NVIC_SetPriority(irq_n, 0);
elessair 0:f269e3021894 676 NVIC_SetVector(irq_n, (uint32_t)handler);
elessair 0:f269e3021894 677 NVIC_EnableIRQ(irq_n);
elessair 0:f269e3021894 678
elessair 0:f269e3021894 679 // following HAL function will enable the RXNE interrupt + error interrupts
elessair 0:f269e3021894 680 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
elessair 0:f269e3021894 681 }
elessair 0:f269e3021894 682
elessair 0:f269e3021894 683 /**
elessair 0:f269e3021894 684 * Attempts to determine if the serial peripheral is already in use for TX
elessair 0:f269e3021894 685 *
elessair 0:f269e3021894 686 * @param obj The serial object
elessair 0:f269e3021894 687 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 688 */
elessair 0:f269e3021894 689 uint8_t serial_tx_active(serial_t *obj)
elessair 0:f269e3021894 690 {
elessair 0:f269e3021894 691 MBED_ASSERT(obj);
elessair 0:f269e3021894 692
elessair 0:f269e3021894 693 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 694 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 695
elessair 0:f269e3021894 696 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
elessair 0:f269e3021894 697 }
elessair 0:f269e3021894 698
elessair 0:f269e3021894 699 /**
elessair 0:f269e3021894 700 * Attempts to determine if the serial peripheral is already in use for RX
elessair 0:f269e3021894 701 *
elessair 0:f269e3021894 702 * @param obj The serial object
elessair 0:f269e3021894 703 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
elessair 0:f269e3021894 704 */
elessair 0:f269e3021894 705 uint8_t serial_rx_active(serial_t *obj)
elessair 0:f269e3021894 706 {
elessair 0:f269e3021894 707 MBED_ASSERT(obj);
elessair 0:f269e3021894 708
elessair 0:f269e3021894 709 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 710 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 711
elessair 0:f269e3021894 712 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
elessair 0:f269e3021894 713 }
elessair 0:f269e3021894 714
elessair 0:f269e3021894 715 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
elessair 0:f269e3021894 716 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 717 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 718 }
elessair 0:f269e3021894 719 }
elessair 0:f269e3021894 720
elessair 0:f269e3021894 721 /**
elessair 0:f269e3021894 722 * The asynchronous TX and RX handler.
elessair 0:f269e3021894 723 *
elessair 0:f269e3021894 724 * @param obj The serial object
elessair 0:f269e3021894 725 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
elessair 0:f269e3021894 726 */
elessair 0:f269e3021894 727 int serial_irq_handler_asynch(serial_t *obj)
elessair 0:f269e3021894 728 {
elessair 0:f269e3021894 729 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 730 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 731
elessair 0:f269e3021894 732 volatile int return_event = 0;
elessair 0:f269e3021894 733 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
elessair 0:f269e3021894 734 uint8_t i = 0;
elessair 0:f269e3021894 735
elessair 0:f269e3021894 736 // TX PART:
elessair 0:f269e3021894 737 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
elessair 0:f269e3021894 738 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
elessair 0:f269e3021894 739 // Return event SERIAL_EVENT_TX_COMPLETE if requested
elessair 0:f269e3021894 740 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
elessair 0:f269e3021894 741 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 742 }
elessair 0:f269e3021894 743 }
elessair 0:f269e3021894 744 }
elessair 0:f269e3021894 745
elessair 0:f269e3021894 746 // Handle error events
elessair 0:f269e3021894 747 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
elessair 0:f269e3021894 748 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 749 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF);
elessair 0:f269e3021894 750 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
elessair 0:f269e3021894 751 }
elessair 0:f269e3021894 752 }
elessair 0:f269e3021894 753
elessair 0:f269e3021894 754 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
elessair 0:f269e3021894 755 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 756 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_FEF);
elessair 0:f269e3021894 757 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
elessair 0:f269e3021894 758 }
elessair 0:f269e3021894 759 }
elessair 0:f269e3021894 760
elessair 0:f269e3021894 761 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
elessair 0:f269e3021894 762 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 763 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_NEF);
elessair 0:f269e3021894 764 }
elessair 0:f269e3021894 765 }
elessair 0:f269e3021894 766
elessair 0:f269e3021894 767 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
elessair 0:f269e3021894 768 if (__HAL_UART_GET_IT_SOURCE(huart, USART_IT_ERR) != RESET) {
elessair 0:f269e3021894 769 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
elessair 0:f269e3021894 770 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
elessair 0:f269e3021894 771 }
elessair 0:f269e3021894 772 }
elessair 0:f269e3021894 773
elessair 0:f269e3021894 774 HAL_UART_IRQHandler(huart);
elessair 0:f269e3021894 775
elessair 0:f269e3021894 776 // Abort if an error occurs
elessair 0:f269e3021894 777 if (return_event & SERIAL_EVENT_RX_PARITY_ERROR ||
elessair 0:f269e3021894 778 return_event & SERIAL_EVENT_RX_FRAMING_ERROR ||
elessair 0:f269e3021894 779 return_event & SERIAL_EVENT_RX_OVERRUN_ERROR) {
elessair 0:f269e3021894 780 return return_event;
elessair 0:f269e3021894 781 }
elessair 0:f269e3021894 782
elessair 0:f269e3021894 783 //RX PART
elessair 0:f269e3021894 784 if (huart->RxXferSize != 0) {
elessair 0:f269e3021894 785 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
elessair 0:f269e3021894 786 }
elessair 0:f269e3021894 787 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
elessair 0:f269e3021894 788 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
elessair 0:f269e3021894 789 }
elessair 0:f269e3021894 790
elessair 0:f269e3021894 791 // Check if char_match is present
elessair 0:f269e3021894 792 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
elessair 0:f269e3021894 793 if (buf != NULL) {
elessair 0:f269e3021894 794 for (i = 0; i < obj->rx_buff.pos; i++) {
elessair 0:f269e3021894 795 if (buf[i] == obj->char_match) {
elessair 0:f269e3021894 796 obj->rx_buff.pos = i;
elessair 0:f269e3021894 797 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
elessair 0:f269e3021894 798 serial_rx_abort_asynch(obj);
elessair 0:f269e3021894 799 break;
elessair 0:f269e3021894 800 }
elessair 0:f269e3021894 801 }
elessair 0:f269e3021894 802 }
elessair 0:f269e3021894 803 }
elessair 0:f269e3021894 804
elessair 0:f269e3021894 805 return return_event;
elessair 0:f269e3021894 806 }
elessair 0:f269e3021894 807
elessair 0:f269e3021894 808 /**
elessair 0:f269e3021894 809 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
elessair 0:f269e3021894 810 * flush TX hardware buffer if TX FIFO is used
elessair 0:f269e3021894 811 *
elessair 0:f269e3021894 812 * @param obj The serial object
elessair 0:f269e3021894 813 */
elessair 0:f269e3021894 814 void serial_tx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 815 {
elessair 0:f269e3021894 816 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 817 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 818
elessair 0:f269e3021894 819 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
elessair 0:f269e3021894 820 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
elessair 0:f269e3021894 821
elessair 0:f269e3021894 822 // clear flags
elessair 0:f269e3021894 823 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
elessair 0:f269e3021894 824
elessair 0:f269e3021894 825 // reset states
elessair 0:f269e3021894 826 huart->TxXferCount = 0;
elessair 0:f269e3021894 827 // update handle state
elessair 0:f269e3021894 828 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 829 huart->State = HAL_UART_STATE_BUSY_RX;
elessair 0:f269e3021894 830 } else {
elessair 0:f269e3021894 831 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 832 }
elessair 0:f269e3021894 833 }
elessair 0:f269e3021894 834
elessair 0:f269e3021894 835 /**
elessair 0:f269e3021894 836 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
elessair 0:f269e3021894 837 * flush RX hardware buffer if RX FIFO is used
elessair 0:f269e3021894 838 *
elessair 0:f269e3021894 839 * @param obj The serial object
elessair 0:f269e3021894 840 */
elessair 0:f269e3021894 841 void serial_rx_abort_asynch(serial_t *obj)
elessair 0:f269e3021894 842 {
elessair 0:f269e3021894 843 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 844 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
elessair 0:f269e3021894 845
elessair 0:f269e3021894 846 // disable interrupts
elessair 0:f269e3021894 847 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
elessair 0:f269e3021894 848 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
elessair 0:f269e3021894 849 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
elessair 0:f269e3021894 850
elessair 0:f269e3021894 851 // clear flags
elessair 0:f269e3021894 852 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF | UART_CLEAR_FEF | UART_CLEAR_OREF);
elessair 0:f269e3021894 853 volatile uint32_t tmpval = huart->Instance->RDR; // Clear RXNE flag
elessair 0:f269e3021894 854
elessair 0:f269e3021894 855 // reset states
elessair 0:f269e3021894 856 huart->RxXferCount = 0;
elessair 0:f269e3021894 857 // update handle state
elessair 0:f269e3021894 858 if(huart->State == HAL_UART_STATE_BUSY_TX_RX) {
elessair 0:f269e3021894 859 huart->State = HAL_UART_STATE_BUSY_TX;
elessair 0:f269e3021894 860 } else {
elessair 0:f269e3021894 861 huart->State = HAL_UART_STATE_READY;
elessair 0:f269e3021894 862 }
elessair 0:f269e3021894 863 }
elessair 0:f269e3021894 864
elessair 0:f269e3021894 865 #endif
elessair 0:f269e3021894 866
elessair 0:f269e3021894 867 #if DEVICE_SERIAL_FC
elessair 0:f269e3021894 868
elessair 0:f269e3021894 869 /**
elessair 0:f269e3021894 870 * Set HW Control Flow
elessair 0:f269e3021894 871 * @param obj The serial object
elessair 0:f269e3021894 872 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
elessair 0:f269e3021894 873 * @param rxflow Pin for the rxflow
elessair 0:f269e3021894 874 * @param txflow Pin for the txflow
elessair 0:f269e3021894 875 */
elessair 0:f269e3021894 876 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
elessair 0:f269e3021894 877 {
elessair 0:f269e3021894 878 struct serial_s *obj_s = SERIAL_S(obj);
elessair 0:f269e3021894 879
elessair 0:f269e3021894 880 // Determine the UART to use (UART_1, UART_2, ...)
elessair 0:f269e3021894 881 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 882 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 883
elessair 0:f269e3021894 884 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
elessair 0:f269e3021894 885 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
elessair 0:f269e3021894 886 MBED_ASSERT(obj_s->uart != (UARTName)NC);
elessair 0:f269e3021894 887
elessair 0:f269e3021894 888 if(type == FlowControlNone) {
elessair 0:f269e3021894 889 // Disable hardware flow control
elessair 0:f269e3021894 890 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
elessair 0:f269e3021894 891 }
elessair 0:f269e3021894 892 if (type == FlowControlRTS) {
elessair 0:f269e3021894 893 // Enable RTS
elessair 0:f269e3021894 894 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 895 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
elessair 0:f269e3021894 896 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 897 // Enable the pin for RTS function
elessair 0:f269e3021894 898 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 899 }
elessair 0:f269e3021894 900 if (type == FlowControlCTS) {
elessair 0:f269e3021894 901 // Enable CTS
elessair 0:f269e3021894 902 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 903 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
elessair 0:f269e3021894 904 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 905 // Enable the pin for CTS function
elessair 0:f269e3021894 906 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 907 }
elessair 0:f269e3021894 908 if (type == FlowControlRTSCTS) {
elessair 0:f269e3021894 909 // Enable CTS & RTS
elessair 0:f269e3021894 910 MBED_ASSERT(uart_rts != (UARTName)NC);
elessair 0:f269e3021894 911 MBED_ASSERT(uart_cts != (UARTName)NC);
elessair 0:f269e3021894 912 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
elessair 0:f269e3021894 913 obj_s->pin_rts = rxflow;
elessair 0:f269e3021894 914 obj_s->pin_cts = txflow;
elessair 0:f269e3021894 915 // Enable the pin for CTS function
elessair 0:f269e3021894 916 pinmap_pinout(txflow, PinMap_UART_CTS);
elessair 0:f269e3021894 917 // Enable the pin for RTS function
elessair 0:f269e3021894 918 pinmap_pinout(rxflow, PinMap_UART_RTS);
elessair 0:f269e3021894 919 }
elessair 0:f269e3021894 920
elessair 0:f269e3021894 921 init_uart(obj);
elessair 0:f269e3021894 922 }
elessair 0:f269e3021894 923
elessair 0:f269e3021894 924 #endif
elessair 0:f269e3021894 925
elessair 0:f269e3021894 926 #endif