shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c@155:8435094ec241, 2014-04-08 (annotated)

Committer:
mbed_official
Date:
Tue Apr 08 09:15:06 2014 +0100
Revision:
155:8435094ec241
Child:
227:7bd0639b8911
Synchronized with git revision d616c415fc62f490b915ff0ff39c8d24b2917c0f



Full URL: https://github.com/mbedmicro/mbed/commit/d616c415fc62f490b915ff0ff39c8d24b2917c0f/



[STM32F3XX] Initial port

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 155:8435094ec241 30 #include "serial_api.h"
mbed_official 155:8435094ec241 31 #include "cmsis.h"
mbed_official 155:8435094ec241 32 #include "pinmap.h"
mbed_official 155:8435094ec241 33 #include "error.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 155:8435094ec241 95
mbed_official 155:8435094ec241 96 if (obj->uart == (UARTName)NC) {
mbed_official 155:8435094ec241 97 error("Serial pinout mapping failed");
mbed_official 155:8435094ec241 98 }
mbed_official 155:8435094ec241 99
mbed_official 155:8435094ec241 100 // Enable USART clock
mbed_official 155:8435094ec241 101 if (obj->uart == UART_1) {
mbed_official 155:8435094ec241 102 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 155:8435094ec241 103 }
mbed_official 155:8435094ec241 104 if (obj->uart == UART_2) {
mbed_official 155:8435094ec241 105 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 155:8435094ec241 106 }
mbed_official 155:8435094ec241 107 if (obj->uart == UART_3) {
mbed_official 155:8435094ec241 108 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 155:8435094ec241 109 }
mbed_official 155:8435094ec241 110
mbed_official 155:8435094ec241 111 // Configure the UART pins
mbed_official 155:8435094ec241 112 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 155:8435094ec241 113 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 155:8435094ec241 114 pin_mode(tx, PullUp);
mbed_official 155:8435094ec241 115 pin_mode(rx, PullUp);
mbed_official 155:8435094ec241 116
mbed_official 155:8435094ec241 117 // Configure UART
mbed_official 155:8435094ec241 118 obj->baudrate = 9600;
mbed_official 155:8435094ec241 119 obj->databits = USART_WordLength_8b;
mbed_official 155:8435094ec241 120 obj->stopbits = USART_StopBits_1;
mbed_official 155:8435094ec241 121 obj->parity = USART_Parity_No;
mbed_official 155:8435094ec241 122
mbed_official 155:8435094ec241 123 init_usart(obj);
mbed_official 155:8435094ec241 124
mbed_official 155:8435094ec241 125 // The index is used by irq
mbed_official 155:8435094ec241 126 if (obj->uart == UART_1) obj->index = 0;
mbed_official 155:8435094ec241 127 if (obj->uart == UART_2) obj->index = 1;
mbed_official 155:8435094ec241 128 if (obj->uart == UART_3) obj->index = 2;
mbed_official 155:8435094ec241 129
mbed_official 155:8435094ec241 130 // For stdio management
mbed_official 155:8435094ec241 131 if (obj->uart == STDIO_UART) {
mbed_official 155:8435094ec241 132 stdio_uart_inited = 1;
mbed_official 155:8435094ec241 133 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 155:8435094ec241 134 }
mbed_official 155:8435094ec241 135
mbed_official 155:8435094ec241 136 }
mbed_official 155:8435094ec241 137
mbed_official 155:8435094ec241 138 void serial_free(serial_t *obj) {
mbed_official 155:8435094ec241 139 serial_irq_ids[obj->index] = 0;
mbed_official 155:8435094ec241 140 }
mbed_official 155:8435094ec241 141
mbed_official 155:8435094ec241 142 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 155:8435094ec241 143 obj->baudrate = baudrate;
mbed_official 155:8435094ec241 144 init_usart(obj);
mbed_official 155:8435094ec241 145 }
mbed_official 155:8435094ec241 146
mbed_official 155:8435094ec241 147 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 155:8435094ec241 148 if (data_bits == 8) {
mbed_official 155:8435094ec241 149 obj->databits = USART_WordLength_8b;
mbed_official 155:8435094ec241 150 } else {
mbed_official 155:8435094ec241 151 obj->databits = USART_WordLength_9b;
mbed_official 155:8435094ec241 152 }
mbed_official 155:8435094ec241 153
mbed_official 155:8435094ec241 154 switch (parity) {
mbed_official 155:8435094ec241 155 case ParityOdd:
mbed_official 155:8435094ec241 156 case ParityForced0:
mbed_official 155:8435094ec241 157 obj->parity = USART_Parity_Odd;
mbed_official 155:8435094ec241 158 break;
mbed_official 155:8435094ec241 159 case ParityEven:
mbed_official 155:8435094ec241 160 case ParityForced1:
mbed_official 155:8435094ec241 161 obj->parity = USART_Parity_Even;
mbed_official 155:8435094ec241 162 break;
mbed_official 155:8435094ec241 163 default: // ParityNone
mbed_official 155:8435094ec241 164 obj->parity = USART_Parity_No;
mbed_official 155:8435094ec241 165 break;
mbed_official 155:8435094ec241 166 }
mbed_official 155:8435094ec241 167
mbed_official 155:8435094ec241 168 if (stop_bits == 2) {
mbed_official 155:8435094ec241 169 obj->stopbits = USART_StopBits_2;
mbed_official 155:8435094ec241 170 } else {
mbed_official 155:8435094ec241 171 obj->stopbits = USART_StopBits_1;
mbed_official 155:8435094ec241 172 }
mbed_official 155:8435094ec241 173
mbed_official 155:8435094ec241 174 init_usart(obj);
mbed_official 155:8435094ec241 175 }
mbed_official 155:8435094ec241 176
mbed_official 155:8435094ec241 177 /******************************************************************************
mbed_official 155:8435094ec241 178 * INTERRUPTS HANDLING
mbed_official 155:8435094ec241 179 ******************************************************************************/
mbed_official 155:8435094ec241 180
mbed_official 155:8435094ec241 181 // not api
mbed_official 155:8435094ec241 182 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 155:8435094ec241 183 if (serial_irq_ids[id] != 0) {
mbed_official 155:8435094ec241 184 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 155:8435094ec241 185 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 155:8435094ec241 186 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 155:8435094ec241 187 }
mbed_official 155:8435094ec241 188 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 155:8435094ec241 189 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 155:8435094ec241 190 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 155:8435094ec241 191 }
mbed_official 155:8435094ec241 192 }
mbed_official 155:8435094ec241 193 }
mbed_official 155:8435094ec241 194
mbed_official 155:8435094ec241 195 static void uart1_irq(void) {
mbed_official 155:8435094ec241 196 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 155:8435094ec241 197 }
mbed_official 155:8435094ec241 198 static void uart2_irq(void) {
mbed_official 155:8435094ec241 199 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 155:8435094ec241 200 }
mbed_official 155:8435094ec241 201 static void uart3_irq(void) {
mbed_official 155:8435094ec241 202 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 155:8435094ec241 203 }
mbed_official 155:8435094ec241 204
mbed_official 155:8435094ec241 205 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 155:8435094ec241 206 irq_handler = handler;
mbed_official 155:8435094ec241 207 serial_irq_ids[obj->index] = id;
mbed_official 155:8435094ec241 208 }
mbed_official 155:8435094ec241 209
mbed_official 155:8435094ec241 210 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 155:8435094ec241 211 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 155:8435094ec241 212 uint32_t vector = 0;
mbed_official 155:8435094ec241 213 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 214
mbed_official 155:8435094ec241 215 if (obj->uart == UART_1) {
mbed_official 155:8435094ec241 216 irq_n = USART1_IRQn;
mbed_official 155:8435094ec241 217 vector = (uint32_t)&uart1_irq;
mbed_official 155:8435094ec241 218 }
mbed_official 155:8435094ec241 219
mbed_official 155:8435094ec241 220 if (obj->uart == UART_2) {
mbed_official 155:8435094ec241 221 irq_n = USART2_IRQn;
mbed_official 155:8435094ec241 222 vector = (uint32_t)&uart2_irq;
mbed_official 155:8435094ec241 223 }
mbed_official 155:8435094ec241 224
mbed_official 155:8435094ec241 225 if (obj->uart == UART_3) {
mbed_official 155:8435094ec241 226 irq_n = USART3_IRQn;
mbed_official 155:8435094ec241 227 vector = (uint32_t)&uart3_irq;
mbed_official 155:8435094ec241 228 }
mbed_official 155:8435094ec241 229
mbed_official 155:8435094ec241 230 if (enable) {
mbed_official 155:8435094ec241 231
mbed_official 155:8435094ec241 232 if (irq == RxIrq) {
mbed_official 155:8435094ec241 233 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 155:8435094ec241 234 } else { // TxIrq
mbed_official 155:8435094ec241 235 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 155:8435094ec241 236 }
mbed_official 155:8435094ec241 237
mbed_official 155:8435094ec241 238 NVIC_SetVector(irq_n, vector);
mbed_official 155:8435094ec241 239 NVIC_EnableIRQ(irq_n);
mbed_official 155:8435094ec241 240
mbed_official 155:8435094ec241 241 } else { // disable
mbed_official 155:8435094ec241 242
mbed_official 155:8435094ec241 243 int all_disabled = 0;
mbed_official 155:8435094ec241 244
mbed_official 155:8435094ec241 245 if (irq == RxIrq) {
mbed_official 155:8435094ec241 246 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 155:8435094ec241 247 // Check if TxIrq is disabled too
mbed_official 155:8435094ec241 248 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 155:8435094ec241 249 } else { // TxIrq
mbed_official 155:8435094ec241 250 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 155:8435094ec241 251 // Check if RxIrq is disabled too
mbed_official 155:8435094ec241 252 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 155:8435094ec241 253 }
mbed_official 155:8435094ec241 254
mbed_official 155:8435094ec241 255 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 155:8435094ec241 256
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 * READ/WRITE
mbed_official 155:8435094ec241 262 ******************************************************************************/
mbed_official 155:8435094ec241 263
mbed_official 155:8435094ec241 264 int serial_getc(serial_t *obj) {
mbed_official 155:8435094ec241 265 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 266 while (!serial_readable(obj));
mbed_official 155:8435094ec241 267 return (int)(USART_ReceiveData(usart));
mbed_official 155:8435094ec241 268 }
mbed_official 155:8435094ec241 269
mbed_official 155:8435094ec241 270 void serial_putc(serial_t *obj, int c) {
mbed_official 155:8435094ec241 271 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 272 while (!serial_writable(obj));
mbed_official 155:8435094ec241 273 USART_SendData(usart, (uint16_t)c);
mbed_official 155:8435094ec241 274 }
mbed_official 155:8435094ec241 275
mbed_official 155:8435094ec241 276 int serial_readable(serial_t *obj) {
mbed_official 155:8435094ec241 277 int status;
mbed_official 155:8435094ec241 278 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 279 // Check if data is received
mbed_official 155:8435094ec241 280 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 155:8435094ec241 281 return status;
mbed_official 155:8435094ec241 282 }
mbed_official 155:8435094ec241 283
mbed_official 155:8435094ec241 284 int serial_writable(serial_t *obj) {
mbed_official 155:8435094ec241 285 int status;
mbed_official 155:8435094ec241 286 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 287 // Check if data is transmitted
mbed_official 155:8435094ec241 288 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 155:8435094ec241 289 return status;
mbed_official 155:8435094ec241 290 }
mbed_official 155:8435094ec241 291
mbed_official 155:8435094ec241 292 void serial_clear(serial_t *obj) {
mbed_official 155:8435094ec241 293 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 294 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 155:8435094ec241 295 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 155:8435094ec241 296 }
mbed_official 155:8435094ec241 297
mbed_official 155:8435094ec241 298 void serial_pinout_tx(PinName tx) {
mbed_official 155:8435094ec241 299 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 155:8435094ec241 300 }
mbed_official 155:8435094ec241 301
mbed_official 155:8435094ec241 302 void serial_break_set(serial_t *obj) {
mbed_official 155:8435094ec241 303 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 304 USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE);
mbed_official 155:8435094ec241 305 }
mbed_official 155:8435094ec241 306
mbed_official 155:8435094ec241 307 void serial_break_clear(serial_t *obj) {
mbed_official 155:8435094ec241 308 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 155:8435094ec241 309 USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE);
mbed_official 155:8435094ec241 310 USART_ClearFlag(usart, USART_FLAG_SBK);
mbed_official 155:8435094ec241 311 }