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mbed library sources

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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.

Development branch of the mbed library sources. This library is kept in synch with the latest changes from the mbed SDK and it is not guaranteed to work.

If you are looking for a stable and tested release, please import one of the official mbed library releases:

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The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.

Last commit 20 Feb 2019 by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/serial_api.c@174:8bb9f3a33240, 2014-04-29 (annotated)

Committer:
mbed_official
Date:
Tue Apr 29 11:15:07 2014 +0100
Revision:
174:8bb9f3a33240
Parent:
167:d5744491c362
Child:
208:4557f4bb2dd5
Synchronized with git revision 5bf985ebc651a2c31cefabd9d62c51dc465ef60a



Full URL: https://github.com/mbedmicro/mbed/commit/5bf985ebc651a2c31cefabd9d62c51dc465ef60a/



[NUCLEO_L152RE/F103RB] Add LSE configuration for RTC

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 52:a51c77007319 1 /* mbed Microcontroller Library
mbed_official 70:c1fbde68b492 2 *******************************************************************************
mbed_official 70:c1fbde68b492 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 70:c1fbde68b492 4 * All rights reserved.
mbed_official 52:a51c77007319 5 *
mbed_official 70:c1fbde68b492 6 * Redistribution and use in source and binary forms, with or without
mbed_official 70:c1fbde68b492 7 * modification, are permitted provided that the following conditions are met:
mbed_official 52:a51c77007319 8 *
mbed_official 70:c1fbde68b492 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 70:c1fbde68b492 10 * this list of conditions and the following disclaimer.
mbed_official 70:c1fbde68b492 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 70:c1fbde68b492 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 70:c1fbde68b492 13 * and/or other materials provided with the distribution.
mbed_official 70:c1fbde68b492 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 70:c1fbde68b492 15 * may be used to endorse or promote products derived from this software
mbed_official 70:c1fbde68b492 16 * without specific prior written permission.
mbed_official 52:a51c77007319 17 *
mbed_official 70:c1fbde68b492 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 70:c1fbde68b492 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 70:c1fbde68b492 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 70:c1fbde68b492 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 70:c1fbde68b492 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 70:c1fbde68b492 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 70:c1fbde68b492 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 70:c1fbde68b492 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 70:c1fbde68b492 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 70:c1fbde68b492 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 70:c1fbde68b492 28 *******************************************************************************
mbed_official 52:a51c77007319 29 */
mbed_official 52:a51c77007319 30 #include "serial_api.h"
mbed_official 174:8bb9f3a33240 31
mbed_official 174:8bb9f3a33240 32 #if DEVICE_SERIAL
mbed_official 174:8bb9f3a33240 33
mbed_official 52:a51c77007319 34 #include "cmsis.h"
mbed_official 52:a51c77007319 35 #include "pinmap.h"
mbed_official 52:a51c77007319 36 #include "error.h"
mbed_official 52:a51c77007319 37 #include <string.h>
mbed_official 52:a51c77007319 38
mbed_official 52:a51c77007319 39 static const PinMap PinMap_UART_TX[] = {
mbed_official 167:d5744491c362 40 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)},
mbed_official 52:a51c77007319 41 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)},
mbed_official 167:d5744491c362 42 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF_PP, 3)}, // GPIO_Remap_USART1
mbed_official 167:d5744491c362 43 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)},
mbed_official 167:d5744491c362 44 {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF_PP, 5)}, // GPIO_PartialRemap_USART3
mbed_official 52:a51c77007319 45 {NC, NC, 0}
mbed_official 52:a51c77007319 46 };
mbed_official 52:a51c77007319 47
mbed_official 52:a51c77007319 48 static const PinMap PinMap_UART_RX[] = {
mbed_official 167:d5744491c362 49 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)},
mbed_official 52:a51c77007319 50 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)},
mbed_official 167:d5744491c362 51 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 3)}, // GPIO_Remap_USART1
mbed_official 167:d5744491c362 52 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)},
mbed_official 167:d5744491c362 53 {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 5)}, // GPIO_PartialRemap_USART3
mbed_official 52:a51c77007319 54 {NC, NC, 0}
mbed_official 52:a51c77007319 55 };
mbed_official 52:a51c77007319 56
mbed_official 167:d5744491c362 57 #define UART_NUM (3)
mbed_official 52:a51c77007319 58
mbed_official 167:d5744491c362 59 static uint32_t serial_irq_ids[UART_NUM] = {0, 0, 0};
mbed_official 52:a51c77007319 60
mbed_official 52:a51c77007319 61 static uart_irq_handler irq_handler;
mbed_official 52:a51c77007319 62
mbed_official 52:a51c77007319 63 int stdio_uart_inited = 0;
mbed_official 52:a51c77007319 64 serial_t stdio_uart;
mbed_official 52:a51c77007319 65
mbed_official 56:99eb381a3269 66 static void init_usart(serial_t *obj) {
mbed_official 56:99eb381a3269 67 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 68 USART_InitTypeDef USART_InitStructure;
mbed_official 174:8bb9f3a33240 69
mbed_official 56:99eb381a3269 70 USART_Cmd(usart, DISABLE);
mbed_official 56:99eb381a3269 71
mbed_official 167:d5744491c362 72 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 167:d5744491c362 73 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 167:d5744491c362 74 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 167:d5744491c362 75 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 56:99eb381a3269 76 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 167:d5744491c362 77 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 56:99eb381a3269 78 USART_Init(usart, &USART_InitStructure);
mbed_official 174:8bb9f3a33240 79
mbed_official 56:99eb381a3269 80 USART_Cmd(usart, ENABLE);
mbed_official 56:99eb381a3269 81 }
mbed_official 56:99eb381a3269 82
mbed_official 174:8bb9f3a33240 83 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 52:a51c77007319 84 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 52:a51c77007319 85 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 86 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 174:8bb9f3a33240 87
mbed_official 52:a51c77007319 88 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 52:a51c77007319 89 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 52:a51c77007319 90
mbed_official 52:a51c77007319 91 if (obj->uart == (UARTName)NC) {
mbed_official 52:a51c77007319 92 error("Serial pinout mapping failed");
mbed_official 52:a51c77007319 93 }
mbed_official 56:99eb381a3269 94
mbed_official 52:a51c77007319 95 // Enable USART clock
mbed_official 52:a51c77007319 96 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 97 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 52:a51c77007319 98 }
mbed_official 52:a51c77007319 99 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 100 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 52:a51c77007319 101 }
mbed_official 167:d5744491c362 102 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 103 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 167:d5744491c362 104 }
mbed_official 174:8bb9f3a33240 105
mbed_official 52:a51c77007319 106 // Configure the UART pins
mbed_official 52:a51c77007319 107 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 108 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 52:a51c77007319 109
mbed_official 52:a51c77007319 110 // Configure UART
mbed_official 52:a51c77007319 111 obj->baudrate = 9600;
mbed_official 52:a51c77007319 112 obj->databits = USART_WordLength_8b;
mbed_official 52:a51c77007319 113 obj->stopbits = USART_StopBits_1;
mbed_official 174:8bb9f3a33240 114 obj->parity = USART_Parity_No;
mbed_official 52:a51c77007319 115
mbed_official 56:99eb381a3269 116 init_usart(obj);
mbed_official 52:a51c77007319 117
mbed_official 52:a51c77007319 118 // The index is used by irq
mbed_official 52:a51c77007319 119 if (obj->uart == UART_1) obj->index = 0;
mbed_official 52:a51c77007319 120 if (obj->uart == UART_2) obj->index = 1;
mbed_official 167:d5744491c362 121 if (obj->uart == UART_3) obj->index = 2;
mbed_official 174:8bb9f3a33240 122
mbed_official 52:a51c77007319 123 // For stdio management
mbed_official 52:a51c77007319 124 if (obj->uart == STDIO_UART) {
mbed_official 52:a51c77007319 125 stdio_uart_inited = 1;
mbed_official 52:a51c77007319 126 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 52:a51c77007319 127 }
mbed_official 52:a51c77007319 128 }
mbed_official 52:a51c77007319 129
mbed_official 52:a51c77007319 130 void serial_free(serial_t *obj) {
mbed_official 52:a51c77007319 131 serial_irq_ids[obj->index] = 0;
mbed_official 52:a51c77007319 132 }
mbed_official 52:a51c77007319 133
mbed_official 52:a51c77007319 134 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 52:a51c77007319 135 obj->baudrate = baudrate;
mbed_official 56:99eb381a3269 136 init_usart(obj);
mbed_official 52:a51c77007319 137 }
mbed_official 52:a51c77007319 138
mbed_official 52:a51c77007319 139 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 52:a51c77007319 140 if (data_bits == 8) {
mbed_official 52:a51c77007319 141 obj->databits = USART_WordLength_8b;
mbed_official 174:8bb9f3a33240 142 } else {
mbed_official 52:a51c77007319 143 obj->databits = USART_WordLength_9b;
mbed_official 52:a51c77007319 144 }
mbed_official 52:a51c77007319 145
mbed_official 52:a51c77007319 146 switch (parity) {
mbed_official 174:8bb9f3a33240 147 case ParityOdd:
mbed_official 174:8bb9f3a33240 148 case ParityForced0:
mbed_official 174:8bb9f3a33240 149 obj->parity = USART_Parity_Odd;
mbed_official 174:8bb9f3a33240 150 break;
mbed_official 174:8bb9f3a33240 151 case ParityEven:
mbed_official 174:8bb9f3a33240 152 case ParityForced1:
mbed_official 174:8bb9f3a33240 153 obj->parity = USART_Parity_Even;
mbed_official 174:8bb9f3a33240 154 break;
mbed_official 174:8bb9f3a33240 155 default: // ParityNone
mbed_official 174:8bb9f3a33240 156 obj->parity = USART_Parity_No;
mbed_official 174:8bb9f3a33240 157 break;
mbed_official 52:a51c77007319 158 }
mbed_official 174:8bb9f3a33240 159
mbed_official 52:a51c77007319 160 if (stop_bits == 2) {
mbed_official 52:a51c77007319 161 obj->stopbits = USART_StopBits_2;
mbed_official 174:8bb9f3a33240 162 } else {
mbed_official 52:a51c77007319 163 obj->stopbits = USART_StopBits_1;
mbed_official 52:a51c77007319 164 }
mbed_official 52:a51c77007319 165
mbed_official 56:99eb381a3269 166 init_usart(obj);
mbed_official 52:a51c77007319 167 }
mbed_official 52:a51c77007319 168
mbed_official 52:a51c77007319 169 /******************************************************************************
mbed_official 52:a51c77007319 170 * INTERRUPTS HANDLING
mbed_official 52:a51c77007319 171 ******************************************************************************/
mbed_official 52:a51c77007319 172
mbed_official 52:a51c77007319 173 // not api
mbed_official 55:3b765ca737a5 174 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 55:3b765ca737a5 175 if (serial_irq_ids[id] != 0) {
mbed_official 55:3b765ca737a5 176 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 55:3b765ca737a5 177 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 55:3b765ca737a5 178 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 52:a51c77007319 179 }
mbed_official 52:a51c77007319 180 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 55:3b765ca737a5 181 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 55:3b765ca737a5 182 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 52:a51c77007319 183 }
mbed_official 52:a51c77007319 184 }
mbed_official 52:a51c77007319 185 }
mbed_official 52:a51c77007319 186
mbed_official 167:d5744491c362 187 static void uart1_irq(void) {
mbed_official 167:d5744491c362 188 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 167:d5744491c362 189 }
mbed_official 167:d5744491c362 190 static void uart2_irq(void) {
mbed_official 167:d5744491c362 191 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 167:d5744491c362 192 }
mbed_official 167:d5744491c362 193 static void uart3_irq(void) {
mbed_official 167:d5744491c362 194 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 167:d5744491c362 195 }
mbed_official 52:a51c77007319 196
mbed_official 52:a51c77007319 197 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 52:a51c77007319 198 irq_handler = handler;
mbed_official 52:a51c77007319 199 serial_irq_ids[obj->index] = id;
mbed_official 52:a51c77007319 200 }
mbed_official 52:a51c77007319 201
mbed_official 52:a51c77007319 202 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 52:a51c77007319 203 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 52:a51c77007319 204 uint32_t vector = 0;
mbed_official 52:a51c77007319 205 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 206
mbed_official 52:a51c77007319 207 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 208 irq_n = USART1_IRQn;
mbed_official 174:8bb9f3a33240 209 vector = (uint32_t)&uart1_irq;
mbed_official 52:a51c77007319 210 }
mbed_official 174:8bb9f3a33240 211
mbed_official 52:a51c77007319 212 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 213 irq_n = USART2_IRQn;
mbed_official 174:8bb9f3a33240 214 vector = (uint32_t)&uart2_irq;
mbed_official 52:a51c77007319 215 }
mbed_official 167:d5744491c362 216
mbed_official 167:d5744491c362 217 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 218 irq_n = USART3_IRQn;
mbed_official 174:8bb9f3a33240 219 vector = (uint32_t)&uart3_irq;
mbed_official 167:d5744491c362 220 }
mbed_official 174:8bb9f3a33240 221
mbed_official 52:a51c77007319 222 if (enable) {
mbed_official 174:8bb9f3a33240 223
mbed_official 52:a51c77007319 224 if (irq == RxIrq) {
mbed_official 52:a51c77007319 225 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 174:8bb9f3a33240 226 } else { // TxIrq
mbed_official 55:3b765ca737a5 227 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 174:8bb9f3a33240 228 }
mbed_official 174:8bb9f3a33240 229
mbed_official 52:a51c77007319 230 NVIC_SetVector(irq_n, vector);
mbed_official 52:a51c77007319 231 NVIC_EnableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 232
mbed_official 52:a51c77007319 233 } else { // disable
mbed_official 174:8bb9f3a33240 234
mbed_official 52:a51c77007319 235 int all_disabled = 0;
mbed_official 174:8bb9f3a33240 236
mbed_official 52:a51c77007319 237 if (irq == RxIrq) {
mbed_official 52:a51c77007319 238 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 52:a51c77007319 239 // Check if TxIrq is disabled too
mbed_official 52:a51c77007319 240 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 174:8bb9f3a33240 241 } else { // TxIrq
mbed_official 52:a51c77007319 242 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 52:a51c77007319 243 // Check if RxIrq is disabled too
mbed_official 174:8bb9f3a33240 244 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 52:a51c77007319 245 }
mbed_official 174:8bb9f3a33240 246
mbed_official 52:a51c77007319 247 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 248
mbed_official 174:8bb9f3a33240 249 }
mbed_official 52:a51c77007319 250 }
mbed_official 52:a51c77007319 251
mbed_official 52:a51c77007319 252 /******************************************************************************
mbed_official 52:a51c77007319 253 * READ/WRITE
mbed_official 52:a51c77007319 254 ******************************************************************************/
mbed_official 52:a51c77007319 255
mbed_official 52:a51c77007319 256 int serial_getc(serial_t *obj) {
mbed_official 52:a51c77007319 257 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 258 while (!serial_readable(obj));
mbed_official 52:a51c77007319 259 return (int)(USART_ReceiveData(usart));
mbed_official 52:a51c77007319 260 }
mbed_official 52:a51c77007319 261
mbed_official 52:a51c77007319 262 void serial_putc(serial_t *obj, int c) {
mbed_official 52:a51c77007319 263 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 264 while (!serial_writable(obj));
mbed_official 52:a51c77007319 265 USART_SendData(usart, (uint16_t)c);
mbed_official 52:a51c77007319 266 }
mbed_official 52:a51c77007319 267
mbed_official 52:a51c77007319 268 int serial_readable(serial_t *obj) {
mbed_official 52:a51c77007319 269 int status;
mbed_official 52:a51c77007319 270 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 271 // Check if data is received
mbed_official 52:a51c77007319 272 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 273 return status;
mbed_official 52:a51c77007319 274 }
mbed_official 52:a51c77007319 275
mbed_official 52:a51c77007319 276 int serial_writable(serial_t *obj) {
mbed_official 52:a51c77007319 277 int status;
mbed_official 52:a51c77007319 278 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 279 // Check if data is transmitted
mbed_official 52:a51c77007319 280 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 281 return status;
mbed_official 52:a51c77007319 282 }
mbed_official 52:a51c77007319 283
mbed_official 52:a51c77007319 284 void serial_clear(serial_t *obj) {
mbed_official 52:a51c77007319 285 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 286 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 52:a51c77007319 287 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 52:a51c77007319 288 }
mbed_official 52:a51c77007319 289
mbed_official 52:a51c77007319 290 void serial_pinout_tx(PinName tx) {
mbed_official 52:a51c77007319 291 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 292 }
mbed_official 52:a51c77007319 293
mbed_official 52:a51c77007319 294 void serial_break_set(serial_t *obj) {
mbed_official 52:a51c77007319 295 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 296 USART_SendBreak(usart);
mbed_official 52:a51c77007319 297 }
mbed_official 52:a51c77007319 298
mbed_official 52:a51c77007319 299 void serial_break_clear(serial_t *obj) {
mbed_official 52:a51c77007319 300 }
mbed_official 174:8bb9f3a33240 301
mbed_official 174:8bb9f3a33240 302 #endif