Jonathan Piat / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c@563:9f26fcd0c9ce, 2015-06-09 (annotated)

Committer:
mbed_official
Date:
Tue Jun 09 15:30:08 2015 +0100
Revision:
563:9f26fcd0c9ce
Parent:
339:40bd4701f3e2 
Synchronized with git revision a140fc60a6f74003a3d46c4ce8bf8c742148b9fd



Full URL: https://github.com/mbedmicro/mbed/commit/a140fc60a6f74003a3d46c4ce8bf8c742148b9fd/

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 155:8435094ec241 1 /* mbed Microcontroller Library
mbed_official 155:8435094ec241 2 *******************************************************************************
mbed_official 155:8435094ec241 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 155:8435094ec241 4 * All rights reserved.
mbed_official 155:8435094ec241 5 *
mbed_official 155:8435094ec241 6 * Redistribution and use in source and binary forms, with or without
mbed_official 155:8435094ec241 7 * modification, are permitted provided that the following conditions are met:
mbed_official 155:8435094ec241 8 *
mbed_official 155:8435094ec241 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 155:8435094ec241 10 * this list of conditions and the following disclaimer.
mbed_official 155:8435094ec241 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 155:8435094ec241 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 155:8435094ec241 13 * and/or other materials provided with the distribution.
mbed_official 155:8435094ec241 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 155:8435094ec241 15 * may be used to endorse or promote products derived from this software
mbed_official 155:8435094ec241 16 * without specific prior written permission.
mbed_official 155:8435094ec241 17 *
mbed_official 155:8435094ec241 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 155:8435094ec241 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 155:8435094ec241 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 155:8435094ec241 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 155:8435094ec241 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 155:8435094ec241 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 155:8435094ec241 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 155:8435094ec241 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 155:8435094ec241 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 155:8435094ec241 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 155:8435094ec241 28 *******************************************************************************
mbed_official 155:8435094ec241 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 155:8435094ec241 31 #include "serial_api.h"
mbed_official 155:8435094ec241 32 #include "cmsis.h"
mbed_official 155:8435094ec241 33 #include "pinmap.h"
mbed_official 155:8435094ec241 34 #include <string.h>
mbed_official 155:8435094ec241 35
mbed_official 155:8435094ec241 36 static const PinMap PinMap_UART_TX[] = {
mbed_official 155:8435094ec241 37 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 38 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 39 {PA_14, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 40 {PB_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 41 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 42 {PB_9, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 43 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 44 {PC_4, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 45 {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 46 {NC, NC, 0}
mbed_official 155:8435094ec241 47 };
mbed_official 155:8435094ec241 48
mbed_official 155:8435094ec241 49 static const PinMap PinMap_UART_RX[] = {
mbed_official 155:8435094ec241 50 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 51 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 52 {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 53 {PB_4, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 54 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 55 {PB_8, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 56 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 57 {PC_5, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 58 {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 155:8435094ec241 59 {NC, NC, 0}
mbed_official 155:8435094ec241 60 };
mbed_official 155:8435094ec241 61
mbed_official 155:8435094ec241 62 #define UART_NUM (2)
mbed_official 155:8435094ec241 63
mbed_official 155:8435094ec241 64 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 155:8435094ec241 65
mbed_official 155:8435094ec241 66 static uart_irq_handler irq_handler;
mbed_official 155:8435094ec241 67
mbed_official 155:8435094ec241 68 int stdio_uart_inited = 0;
mbed_official 155:8435094ec241 69 serial_t stdio_uart;
mbed_official 155:8435094ec241 70
mbed_official 155:8435094ec241 71 static void init_usart(serial_t *obj) {
mbed_official 155:8435094ec241 72 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 73 USART_InitTypeDef USART_InitStructure;
mbed_official 155:8435094ec241 74
mbed_official 155:8435094ec241 75 USART_Cmd(usart, DISABLE);
mbed_official 155:8435094ec241 76
mbed_official 155:8435094ec241 77 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 155:8435094ec241 78 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 155:8435094ec241 79 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 155:8435094ec241 80 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 155:8435094ec241 81 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 155:8435094ec241 82 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 155:8435094ec241 83 USART_Init(usart, &USART_InitStructure);
mbed_official 155:8435094ec241 84
mbed_official 155:8435094ec241 85 USART_Cmd(usart, ENABLE);
mbed_official 155:8435094ec241 86 }
mbed_official 155:8435094ec241 87
mbed_official 155:8435094ec241 88 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 155:8435094ec241 89 // Determine the UART to use
mbed_official 155:8435094ec241 90 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 155:8435094ec241 91 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 155:8435094ec241 92
mbed_official 155:8435094ec241 93 // Get the peripheral name from the pin and assign it to the object
mbed_official 155:8435094ec241 94 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 227:7bd0639b8911 95 MBED_ASSERT(obj->uart != (UARTName)NC);
mbed_official 155:8435094ec241 96
mbed_official 155:8435094ec241 97 // Enable USART clock
mbed_official 155:8435094ec241 98 if (obj->uart == UART_1) {
mbed_official 155:8435094ec241 99 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 155:8435094ec241 100 }
mbed_official 155:8435094ec241 101 if (obj->uart == UART_2) {
mbed_official 155:8435094ec241 102 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 155:8435094ec241 103 }
mbed_official 155:8435094ec241 104 if (obj->uart == UART_3) {
mbed_official 155:8435094ec241 105 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 155:8435094ec241 106 }
mbed_official 155:8435094ec241 107
mbed_official 155:8435094ec241 108 // Configure the UART pins
mbed_official 155:8435094ec241 109 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 155:8435094ec241 110 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 339:40bd4701f3e2 111 if (tx != NC) {
mbed_official 339:40bd4701f3e2 112 pin_mode(tx, PullUp);
mbed_official 339:40bd4701f3e2 113 }
mbed_official 339:40bd4701f3e2 114 if (rx != NC) {
mbed_official 339:40bd4701f3e2 115 pin_mode(rx, PullUp);
mbed_official 339:40bd4701f3e2 116 }
mbed_official 155:8435094ec241 117
mbed_official 155:8435094ec241 118 // Configure UART
mbed_official 155:8435094ec241 119 obj->baudrate = 9600;
mbed_official 155:8435094ec241 120 obj->databits = USART_WordLength_8b;
mbed_official 155:8435094ec241 121 obj->stopbits = USART_StopBits_1;
mbed_official 155:8435094ec241 122 obj->parity = USART_Parity_No;
mbed_official 155:8435094ec241 123
mbed_official 155:8435094ec241 124 init_usart(obj);
mbed_official 155:8435094ec241 125
mbed_official 155:8435094ec241 126 // The index is used by irq
mbed_official 155:8435094ec241 127 if (obj->uart == UART_1) obj->index = 0;
mbed_official 155:8435094ec241 128 if (obj->uart == UART_2) obj->index = 1;
mbed_official 155:8435094ec241 129 if (obj->uart == UART_3) obj->index = 2;
mbed_official 155:8435094ec241 130
mbed_official 155:8435094ec241 131 // For stdio management
mbed_official 155:8435094ec241 132 if (obj->uart == STDIO_UART) {
mbed_official 155:8435094ec241 133 stdio_uart_inited = 1;
mbed_official 155:8435094ec241 134 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 155:8435094ec241 135 }
mbed_official 155:8435094ec241 136
mbed_official 155:8435094ec241 137 }
mbed_official 155:8435094ec241 138
mbed_official 155:8435094ec241 139 void serial_free(serial_t *obj) {
mbed_official 155:8435094ec241 140 serial_irq_ids[obj->index] = 0;
mbed_official 155:8435094ec241 141 }
mbed_official 155:8435094ec241 142
mbed_official 155:8435094ec241 143 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 155:8435094ec241 144 obj->baudrate = baudrate;
mbed_official 155:8435094ec241 145 init_usart(obj);
mbed_official 155:8435094ec241 146 }
mbed_official 155:8435094ec241 147
mbed_official 155:8435094ec241 148 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 155:8435094ec241 149 if (data_bits == 8) {
mbed_official 155:8435094ec241 150 obj->databits = USART_WordLength_8b;
mbed_official 155:8435094ec241 151 } else {
mbed_official 155:8435094ec241 152 obj->databits = USART_WordLength_9b;
mbed_official 155:8435094ec241 153 }
mbed_official 155:8435094ec241 154
mbed_official 155:8435094ec241 155 switch (parity) {
mbed_official 155:8435094ec241 156 case ParityOdd:
mbed_official 155:8435094ec241 157 case ParityForced0:
mbed_official 155:8435094ec241 158 obj->parity = USART_Parity_Odd;
mbed_official 155:8435094ec241 159 break;
mbed_official 155:8435094ec241 160 case ParityEven:
mbed_official 155:8435094ec241 161 case ParityForced1:
mbed_official 155:8435094ec241 162 obj->parity = USART_Parity_Even;
mbed_official 155:8435094ec241 163 break;
mbed_official 155:8435094ec241 164 default: // ParityNone
mbed_official 155:8435094ec241 165 obj->parity = USART_Parity_No;
mbed_official 155:8435094ec241 166 break;
mbed_official 155:8435094ec241 167 }
mbed_official 155:8435094ec241 168
mbed_official 155:8435094ec241 169 if (stop_bits == 2) {
mbed_official 155:8435094ec241 170 obj->stopbits = USART_StopBits_2;
mbed_official 155:8435094ec241 171 } else {
mbed_official 155:8435094ec241 172 obj->stopbits = USART_StopBits_1;
mbed_official 155:8435094ec241 173 }
mbed_official 155:8435094ec241 174
mbed_official 155:8435094ec241 175 init_usart(obj);
mbed_official 155:8435094ec241 176 }
mbed_official 155:8435094ec241 177
mbed_official 155:8435094ec241 178 /******************************************************************************
mbed_official 155:8435094ec241 179 * INTERRUPTS HANDLING
mbed_official 155:8435094ec241 180 ******************************************************************************/
mbed_official 155:8435094ec241 181
mbed_official 155:8435094ec241 182 // not api
mbed_official 155:8435094ec241 183 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 155:8435094ec241 184 if (serial_irq_ids[id] != 0) {
mbed_official 155:8435094ec241 185 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 155:8435094ec241 186 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 155:8435094ec241 187 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 155:8435094ec241 188 }
mbed_official 155:8435094ec241 189 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 155:8435094ec241 190 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 155:8435094ec241 191 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 155:8435094ec241 192 }
mbed_official 155:8435094ec241 193 }
mbed_official 155:8435094ec241 194 }
mbed_official 155:8435094ec241 195
mbed_official 155:8435094ec241 196 static void uart1_irq(void) {
mbed_official 155:8435094ec241 197 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 155:8435094ec241 198 }
mbed_official 155:8435094ec241 199 static void uart2_irq(void) {
mbed_official 155:8435094ec241 200 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 155:8435094ec241 201 }
mbed_official 155:8435094ec241 202 static void uart3_irq(void) {
mbed_official 155:8435094ec241 203 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 155:8435094ec241 204 }
mbed_official 155:8435094ec241 205
mbed_official 155:8435094ec241 206 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 155:8435094ec241 207 irq_handler = handler;
mbed_official 155:8435094ec241 208 serial_irq_ids[obj->index] = id;
mbed_official 155:8435094ec241 209 }
mbed_official 155:8435094ec241 210
mbed_official 155:8435094ec241 211 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 155:8435094ec241 212 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 155:8435094ec241 213 uint32_t vector = 0;
mbed_official 155:8435094ec241 214 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 215
mbed_official 155:8435094ec241 216 if (obj->uart == UART_1) {
mbed_official 155:8435094ec241 217 irq_n = USART1_IRQn;
mbed_official 155:8435094ec241 218 vector = (uint32_t)&uart1_irq;
mbed_official 155:8435094ec241 219 }
mbed_official 155:8435094ec241 220
mbed_official 155:8435094ec241 221 if (obj->uart == UART_2) {
mbed_official 155:8435094ec241 222 irq_n = USART2_IRQn;
mbed_official 155:8435094ec241 223 vector = (uint32_t)&uart2_irq;
mbed_official 155:8435094ec241 224 }
mbed_official 155:8435094ec241 225
mbed_official 155:8435094ec241 226 if (obj->uart == UART_3) {
mbed_official 155:8435094ec241 227 irq_n = USART3_IRQn;
mbed_official 155:8435094ec241 228 vector = (uint32_t)&uart3_irq;
mbed_official 155:8435094ec241 229 }
mbed_official 155:8435094ec241 230
mbed_official 155:8435094ec241 231 if (enable) {
mbed_official 155:8435094ec241 232
mbed_official 155:8435094ec241 233 if (irq == RxIrq) {
mbed_official 155:8435094ec241 234 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 155:8435094ec241 235 } else { // TxIrq
mbed_official 155:8435094ec241 236 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 155:8435094ec241 237 }
mbed_official 155:8435094ec241 238
mbed_official 155:8435094ec241 239 NVIC_SetVector(irq_n, vector);
mbed_official 155:8435094ec241 240 NVIC_EnableIRQ(irq_n);
mbed_official 155:8435094ec241 241
mbed_official 155:8435094ec241 242 } else { // disable
mbed_official 155:8435094ec241 243
mbed_official 155:8435094ec241 244 int all_disabled = 0;
mbed_official 155:8435094ec241 245
mbed_official 155:8435094ec241 246 if (irq == RxIrq) {
mbed_official 155:8435094ec241 247 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 155:8435094ec241 248 // Check if TxIrq is disabled too
mbed_official 155:8435094ec241 249 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 155:8435094ec241 250 } else { // TxIrq
mbed_official 155:8435094ec241 251 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 155:8435094ec241 252 // Check if RxIrq is disabled too
mbed_official 155:8435094ec241 253 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 155:8435094ec241 254 }
mbed_official 155:8435094ec241 255
mbed_official 155:8435094ec241 256 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 155:8435094ec241 257
mbed_official 155:8435094ec241 258 }
mbed_official 155:8435094ec241 259 }
mbed_official 155:8435094ec241 260
mbed_official 155:8435094ec241 261 /******************************************************************************
mbed_official 155:8435094ec241 262 * READ/WRITE
mbed_official 155:8435094ec241 263 ******************************************************************************/
mbed_official 155:8435094ec241 264
mbed_official 155:8435094ec241 265 int serial_getc(serial_t *obj) {
mbed_official 155:8435094ec241 266 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 267 while (!serial_readable(obj));
mbed_official 155:8435094ec241 268 return (int)(USART_ReceiveData(usart));
mbed_official 155:8435094ec241 269 }
mbed_official 155:8435094ec241 270
mbed_official 155:8435094ec241 271 void serial_putc(serial_t *obj, int c) {
mbed_official 155:8435094ec241 272 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 273 while (!serial_writable(obj));
mbed_official 155:8435094ec241 274 USART_SendData(usart, (uint16_t)c);
mbed_official 155:8435094ec241 275 }
mbed_official 155:8435094ec241 276
mbed_official 155:8435094ec241 277 int serial_readable(serial_t *obj) {
mbed_official 155:8435094ec241 278 int status;
mbed_official 155:8435094ec241 279 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 280 // Check if data is received
mbed_official 155:8435094ec241 281 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 155:8435094ec241 282 return status;
mbed_official 155:8435094ec241 283 }
mbed_official 155:8435094ec241 284
mbed_official 155:8435094ec241 285 int serial_writable(serial_t *obj) {
mbed_official 155:8435094ec241 286 int status;
mbed_official 155:8435094ec241 287 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 288 // Check if data is transmitted
mbed_official 155:8435094ec241 289 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 155:8435094ec241 290 return status;
mbed_official 155:8435094ec241 291 }
mbed_official 155:8435094ec241 292
mbed_official 155:8435094ec241 293 void serial_clear(serial_t *obj) {
mbed_official 155:8435094ec241 294 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 295 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 155:8435094ec241 296 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 155:8435094ec241 297 }
mbed_official 155:8435094ec241 298
mbed_official 155:8435094ec241 299 void serial_pinout_tx(PinName tx) {
mbed_official 155:8435094ec241 300 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 155:8435094ec241 301 }
mbed_official 155:8435094ec241 302
mbed_official 155:8435094ec241 303 void serial_break_set(serial_t *obj) {
mbed_official 155:8435094ec241 304 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 305 USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE);
mbed_official 155:8435094ec241 306 }
mbed_official 155:8435094ec241 307
mbed_official 155:8435094ec241 308 void serial_break_clear(serial_t *obj) {
mbed_official 155:8435094ec241 309 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 310 USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE);
mbed_official 155:8435094ec241 311 USART_ClearFlag(usart, USART_FLAG_SBK);
mbed_official 155:8435094ec241 312 }