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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Superseded

This library was superseded by mbed-dev - https://os.mbed.com/users/mbed_official/code/mbed-dev/.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

Import librarymbed

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@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
215:83cf97a28428
Child:
242:7074e42da0b2
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

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 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 52:a51c77007319 31 #include "serial_api.h"
mbed_official 174:8bb9f3a33240 32
mbed_official 174:8bb9f3a33240 33 #if DEVICE_SERIAL
mbed_official 174:8bb9f3a33240 34
mbed_official 52:a51c77007319 35 #include "cmsis.h"
mbed_official 52:a51c77007319 36 #include "pinmap.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 227:7bd0639b8911 90 MBED_ASSERT(obj->uart != (UARTName)NC);
mbed_official 56:99eb381a3269 91
mbed_official 52:a51c77007319 92 // Enable USART clock
mbed_official 52:a51c77007319 93 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 94 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 215:83cf97a28428 95 obj->index = 0;
mbed_official 52:a51c77007319 96 }
mbed_official 52:a51c77007319 97 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 98 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 215:83cf97a28428 99 obj->index = 1;
mbed_official 52:a51c77007319 100 }
mbed_official 167:d5744491c362 101 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 102 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 215:83cf97a28428 103 obj->index = 2;
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 208:4557f4bb2dd5 116 obj->pin_tx = tx;
mbed_official 208:4557f4bb2dd5 117 obj->pin_rx = rx;
mbed_official 208:4557f4bb2dd5 118
mbed_official 56:99eb381a3269 119 init_usart(obj);
mbed_official 52:a51c77007319 120
mbed_official 52:a51c77007319 121 // For stdio management
mbed_official 52:a51c77007319 122 if (obj->uart == STDIO_UART) {
mbed_official 52:a51c77007319 123 stdio_uart_inited = 1;
mbed_official 52:a51c77007319 124 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 52:a51c77007319 125 }
mbed_official 52:a51c77007319 126 }
mbed_official 52:a51c77007319 127
mbed_official 52:a51c77007319 128 void serial_free(serial_t *obj) {
mbed_official 208:4557f4bb2dd5 129 // Reset UART and disable clock
mbed_official 208:4557f4bb2dd5 130 if (obj->uart == UART_1) {
mbed_official 208:4557f4bb2dd5 131 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 208:4557f4bb2dd5 132 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 208:4557f4bb2dd5 133 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 208:4557f4bb2dd5 134 }
mbed_official 208:4557f4bb2dd5 135 if (obj->uart == UART_2) {
mbed_official 208:4557f4bb2dd5 136 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 208:4557f4bb2dd5 137 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 208:4557f4bb2dd5 138 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 208:4557f4bb2dd5 139 }
mbed_official 208:4557f4bb2dd5 140 if (obj->uart == UART_3) {
mbed_official 208:4557f4bb2dd5 141 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 208:4557f4bb2dd5 142 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 208:4557f4bb2dd5 143 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 208:4557f4bb2dd5 144 }
mbed_official 208:4557f4bb2dd5 145
mbed_official 208:4557f4bb2dd5 146 // Configure GPIOs
mbed_official 208:4557f4bb2dd5 147 pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 148 pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 149
mbed_official 52:a51c77007319 150 serial_irq_ids[obj->index] = 0;
mbed_official 52:a51c77007319 151 }
mbed_official 52:a51c77007319 152
mbed_official 52:a51c77007319 153 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 52:a51c77007319 154 obj->baudrate = baudrate;
mbed_official 56:99eb381a3269 155 init_usart(obj);
mbed_official 52:a51c77007319 156 }
mbed_official 52:a51c77007319 157
mbed_official 52:a51c77007319 158 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 52:a51c77007319 159 if (data_bits == 8) {
mbed_official 52:a51c77007319 160 obj->databits = USART_WordLength_8b;
mbed_official 174:8bb9f3a33240 161 } else {
mbed_official 52:a51c77007319 162 obj->databits = USART_WordLength_9b;
mbed_official 52:a51c77007319 163 }
mbed_official 52:a51c77007319 164
mbed_official 52:a51c77007319 165 switch (parity) {
mbed_official 174:8bb9f3a33240 166 case ParityOdd:
mbed_official 174:8bb9f3a33240 167 case ParityForced0:
mbed_official 174:8bb9f3a33240 168 obj->parity = USART_Parity_Odd;
mbed_official 174:8bb9f3a33240 169 break;
mbed_official 174:8bb9f3a33240 170 case ParityEven:
mbed_official 174:8bb9f3a33240 171 case ParityForced1:
mbed_official 174:8bb9f3a33240 172 obj->parity = USART_Parity_Even;
mbed_official 174:8bb9f3a33240 173 break;
mbed_official 174:8bb9f3a33240 174 default: // ParityNone
mbed_official 174:8bb9f3a33240 175 obj->parity = USART_Parity_No;
mbed_official 174:8bb9f3a33240 176 break;
mbed_official 52:a51c77007319 177 }
mbed_official 174:8bb9f3a33240 178
mbed_official 52:a51c77007319 179 if (stop_bits == 2) {
mbed_official 52:a51c77007319 180 obj->stopbits = USART_StopBits_2;
mbed_official 174:8bb9f3a33240 181 } else {
mbed_official 52:a51c77007319 182 obj->stopbits = USART_StopBits_1;
mbed_official 52:a51c77007319 183 }
mbed_official 52:a51c77007319 184
mbed_official 56:99eb381a3269 185 init_usart(obj);
mbed_official 52:a51c77007319 186 }
mbed_official 52:a51c77007319 187
mbed_official 52:a51c77007319 188 /******************************************************************************
mbed_official 52:a51c77007319 189 * INTERRUPTS HANDLING
mbed_official 52:a51c77007319 190 ******************************************************************************/
mbed_official 52:a51c77007319 191
mbed_official 52:a51c77007319 192 // not api
mbed_official 55:3b765ca737a5 193 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 55:3b765ca737a5 194 if (serial_irq_ids[id] != 0) {
mbed_official 55:3b765ca737a5 195 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 55:3b765ca737a5 196 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 55:3b765ca737a5 197 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 52:a51c77007319 198 }
mbed_official 52:a51c77007319 199 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 55:3b765ca737a5 200 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 55:3b765ca737a5 201 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 52:a51c77007319 202 }
mbed_official 52:a51c77007319 203 }
mbed_official 52:a51c77007319 204 }
mbed_official 52:a51c77007319 205
mbed_official 167:d5744491c362 206 static void uart1_irq(void) {
mbed_official 167:d5744491c362 207 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 167:d5744491c362 208 }
mbed_official 167:d5744491c362 209 static void uart2_irq(void) {
mbed_official 167:d5744491c362 210 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 167:d5744491c362 211 }
mbed_official 167:d5744491c362 212 static void uart3_irq(void) {
mbed_official 167:d5744491c362 213 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 167:d5744491c362 214 }
mbed_official 52:a51c77007319 215
mbed_official 52:a51c77007319 216 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 52:a51c77007319 217 irq_handler = handler;
mbed_official 52:a51c77007319 218 serial_irq_ids[obj->index] = id;
mbed_official 52:a51c77007319 219 }
mbed_official 52:a51c77007319 220
mbed_official 52:a51c77007319 221 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 52:a51c77007319 222 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 52:a51c77007319 223 uint32_t vector = 0;
mbed_official 52:a51c77007319 224 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 225
mbed_official 52:a51c77007319 226 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 227 irq_n = USART1_IRQn;
mbed_official 174:8bb9f3a33240 228 vector = (uint32_t)&uart1_irq;
mbed_official 52:a51c77007319 229 }
mbed_official 174:8bb9f3a33240 230
mbed_official 52:a51c77007319 231 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 232 irq_n = USART2_IRQn;
mbed_official 174:8bb9f3a33240 233 vector = (uint32_t)&uart2_irq;
mbed_official 52:a51c77007319 234 }
mbed_official 167:d5744491c362 235
mbed_official 167:d5744491c362 236 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 237 irq_n = USART3_IRQn;
mbed_official 174:8bb9f3a33240 238 vector = (uint32_t)&uart3_irq;
mbed_official 167:d5744491c362 239 }
mbed_official 174:8bb9f3a33240 240
mbed_official 52:a51c77007319 241 if (enable) {
mbed_official 174:8bb9f3a33240 242
mbed_official 52:a51c77007319 243 if (irq == RxIrq) {
mbed_official 52:a51c77007319 244 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 174:8bb9f3a33240 245 } else { // TxIrq
mbed_official 55:3b765ca737a5 246 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 174:8bb9f3a33240 247 }
mbed_official 174:8bb9f3a33240 248
mbed_official 52:a51c77007319 249 NVIC_SetVector(irq_n, vector);
mbed_official 52:a51c77007319 250 NVIC_EnableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 251
mbed_official 52:a51c77007319 252 } else { // disable
mbed_official 174:8bb9f3a33240 253
mbed_official 52:a51c77007319 254 int all_disabled = 0;
mbed_official 174:8bb9f3a33240 255
mbed_official 52:a51c77007319 256 if (irq == RxIrq) {
mbed_official 52:a51c77007319 257 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 52:a51c77007319 258 // Check if TxIrq is disabled too
mbed_official 52:a51c77007319 259 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 174:8bb9f3a33240 260 } else { // TxIrq
mbed_official 52:a51c77007319 261 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 52:a51c77007319 262 // Check if RxIrq is disabled too
mbed_official 174:8bb9f3a33240 263 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 52:a51c77007319 264 }
mbed_official 174:8bb9f3a33240 265
mbed_official 52:a51c77007319 266 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 267
mbed_official 174:8bb9f3a33240 268 }
mbed_official 52:a51c77007319 269 }
mbed_official 52:a51c77007319 270
mbed_official 52:a51c77007319 271 /******************************************************************************
mbed_official 52:a51c77007319 272 * READ/WRITE
mbed_official 52:a51c77007319 273 ******************************************************************************/
mbed_official 52:a51c77007319 274
mbed_official 52:a51c77007319 275 int serial_getc(serial_t *obj) {
mbed_official 52:a51c77007319 276 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 277 while (!serial_readable(obj));
mbed_official 52:a51c77007319 278 return (int)(USART_ReceiveData(usart));
mbed_official 52:a51c77007319 279 }
mbed_official 52:a51c77007319 280
mbed_official 52:a51c77007319 281 void serial_putc(serial_t *obj, int c) {
mbed_official 52:a51c77007319 282 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 283 while (!serial_writable(obj));
mbed_official 52:a51c77007319 284 USART_SendData(usart, (uint16_t)c);
mbed_official 52:a51c77007319 285 }
mbed_official 52:a51c77007319 286
mbed_official 52:a51c77007319 287 int serial_readable(serial_t *obj) {
mbed_official 52:a51c77007319 288 int status;
mbed_official 52:a51c77007319 289 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 290 // Check if data is received
mbed_official 52:a51c77007319 291 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 292 return status;
mbed_official 52:a51c77007319 293 }
mbed_official 52:a51c77007319 294
mbed_official 52:a51c77007319 295 int serial_writable(serial_t *obj) {
mbed_official 52:a51c77007319 296 int status;
mbed_official 52:a51c77007319 297 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 298 // Check if data is transmitted
mbed_official 52:a51c77007319 299 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 300 return status;
mbed_official 52:a51c77007319 301 }
mbed_official 52:a51c77007319 302
mbed_official 52:a51c77007319 303 void serial_clear(serial_t *obj) {
mbed_official 52:a51c77007319 304 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 305 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 52:a51c77007319 306 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 52:a51c77007319 307 }
mbed_official 52:a51c77007319 308
mbed_official 52:a51c77007319 309 void serial_pinout_tx(PinName tx) {
mbed_official 52:a51c77007319 310 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 311 }
mbed_official 52:a51c77007319 312
mbed_official 52:a51c77007319 313 void serial_break_set(serial_t *obj) {
mbed_official 52:a51c77007319 314 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 315 USART_SendBreak(usart);
mbed_official 52:a51c77007319 316 }
mbed_official 52:a51c77007319 317
mbed_official 52:a51c77007319 318 void serial_break_clear(serial_t *obj) {
mbed_official 52:a51c77007319 319 }
mbed_official 174:8bb9f3a33240 320
mbed_official 174:8bb9f3a33240 321 #endif