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_NUCLEO_F103RB/serial_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
242:7074e42da0b2 
test with CLOCK_SETUP = 0

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 242:7074e42da0b2 77
mbed_official 242:7074e42da0b2 78 if (obj->pin_rx == NC) {
mbed_official 242:7074e42da0b2 79 USART_InitStructure.USART_Mode = USART_Mode_Tx;
mbed_official 242:7074e42da0b2 80 } else if (obj->pin_tx == NC) {
mbed_official 242:7074e42da0b2 81 USART_InitStructure.USART_Mode = USART_Mode_Rx;
mbed_official 242:7074e42da0b2 82 } else {
mbed_official 242:7074e42da0b2 83 USART_InitStructure.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
mbed_official 242:7074e42da0b2 84 }
mbed_official 242:7074e42da0b2 85
mbed_official 56:99eb381a3269 86 USART_Init(usart, &USART_InitStructure);
mbed_official 174:8bb9f3a33240 87
mbed_official 56:99eb381a3269 88 USART_Cmd(usart, ENABLE);
mbed_official 56:99eb381a3269 89 }
mbed_official 56:99eb381a3269 90
mbed_official 174:8bb9f3a33240 91 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 52:a51c77007319 92 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 52:a51c77007319 93 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 94 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 174:8bb9f3a33240 95
mbed_official 52:a51c77007319 96 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 52:a51c77007319 97 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 227:7bd0639b8911 98 MBED_ASSERT(obj->uart != (UARTName)NC);
mbed_official 56:99eb381a3269 99
mbed_official 52:a51c77007319 100 // Enable USART clock
mbed_official 52:a51c77007319 101 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 102 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 215:83cf97a28428 103 obj->index = 0;
mbed_official 52:a51c77007319 104 }
mbed_official 52:a51c77007319 105 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 106 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 215:83cf97a28428 107 obj->index = 1;
mbed_official 52:a51c77007319 108 }
mbed_official 167:d5744491c362 109 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 110 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 215:83cf97a28428 111 obj->index = 2;
mbed_official 167:d5744491c362 112 }
mbed_official 174:8bb9f3a33240 113
mbed_official 52:a51c77007319 114 // Configure the UART pins
mbed_official 52:a51c77007319 115 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 116 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 52:a51c77007319 117
mbed_official 52:a51c77007319 118 // Configure UART
mbed_official 52:a51c77007319 119 obj->baudrate = 9600;
mbed_official 52:a51c77007319 120 obj->databits = USART_WordLength_8b;
mbed_official 52:a51c77007319 121 obj->stopbits = USART_StopBits_1;
mbed_official 174:8bb9f3a33240 122 obj->parity = USART_Parity_No;
mbed_official 52:a51c77007319 123
mbed_official 208:4557f4bb2dd5 124 obj->pin_tx = tx;
mbed_official 208:4557f4bb2dd5 125 obj->pin_rx = rx;
mbed_official 208:4557f4bb2dd5 126
mbed_official 56:99eb381a3269 127 init_usart(obj);
mbed_official 52:a51c77007319 128
mbed_official 52:a51c77007319 129 // For stdio management
mbed_official 52:a51c77007319 130 if (obj->uart == STDIO_UART) {
mbed_official 52:a51c77007319 131 stdio_uart_inited = 1;
mbed_official 52:a51c77007319 132 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 52:a51c77007319 133 }
mbed_official 52:a51c77007319 134 }
mbed_official 52:a51c77007319 135
mbed_official 52:a51c77007319 136 void serial_free(serial_t *obj) {
mbed_official 208:4557f4bb2dd5 137 // Reset UART and disable clock
mbed_official 208:4557f4bb2dd5 138 if (obj->uart == UART_1) {
mbed_official 208:4557f4bb2dd5 139 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 208:4557f4bb2dd5 140 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 208:4557f4bb2dd5 141 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 208:4557f4bb2dd5 142 }
mbed_official 208:4557f4bb2dd5 143 if (obj->uart == UART_2) {
mbed_official 208:4557f4bb2dd5 144 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 208:4557f4bb2dd5 145 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 208:4557f4bb2dd5 146 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 208:4557f4bb2dd5 147 }
mbed_official 208:4557f4bb2dd5 148 if (obj->uart == UART_3) {
mbed_official 208:4557f4bb2dd5 149 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 208:4557f4bb2dd5 150 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 208:4557f4bb2dd5 151 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 208:4557f4bb2dd5 152 }
mbed_official 208:4557f4bb2dd5 153
mbed_official 208:4557f4bb2dd5 154 // Configure GPIOs
mbed_official 208:4557f4bb2dd5 155 pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 156 pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0));
mbed_official 208:4557f4bb2dd5 157
mbed_official 52:a51c77007319 158 serial_irq_ids[obj->index] = 0;
mbed_official 52:a51c77007319 159 }
mbed_official 52:a51c77007319 160
mbed_official 52:a51c77007319 161 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 52:a51c77007319 162 obj->baudrate = baudrate;
mbed_official 56:99eb381a3269 163 init_usart(obj);
mbed_official 52:a51c77007319 164 }
mbed_official 52:a51c77007319 165
mbed_official 52:a51c77007319 166 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 242:7074e42da0b2 167 if (data_bits == 9) {
mbed_official 242:7074e42da0b2 168 obj->databits = USART_WordLength_9b;
mbed_official 242:7074e42da0b2 169 } else {
mbed_official 52:a51c77007319 170 obj->databits = USART_WordLength_8b;
mbed_official 52:a51c77007319 171 }
mbed_official 52:a51c77007319 172
mbed_official 52:a51c77007319 173 switch (parity) {
mbed_official 174:8bb9f3a33240 174 case ParityOdd:
mbed_official 174:8bb9f3a33240 175 case ParityForced0:
mbed_official 174:8bb9f3a33240 176 obj->parity = USART_Parity_Odd;
mbed_official 174:8bb9f3a33240 177 break;
mbed_official 174:8bb9f3a33240 178 case ParityEven:
mbed_official 174:8bb9f3a33240 179 case ParityForced1:
mbed_official 174:8bb9f3a33240 180 obj->parity = USART_Parity_Even;
mbed_official 174:8bb9f3a33240 181 break;
mbed_official 174:8bb9f3a33240 182 default: // ParityNone
mbed_official 174:8bb9f3a33240 183 obj->parity = USART_Parity_No;
mbed_official 174:8bb9f3a33240 184 break;
mbed_official 52:a51c77007319 185 }
mbed_official 174:8bb9f3a33240 186
mbed_official 52:a51c77007319 187 if (stop_bits == 2) {
mbed_official 52:a51c77007319 188 obj->stopbits = USART_StopBits_2;
mbed_official 174:8bb9f3a33240 189 } else {
mbed_official 52:a51c77007319 190 obj->stopbits = USART_StopBits_1;
mbed_official 52:a51c77007319 191 }
mbed_official 52:a51c77007319 192
mbed_official 56:99eb381a3269 193 init_usart(obj);
mbed_official 52:a51c77007319 194 }
mbed_official 52:a51c77007319 195
mbed_official 52:a51c77007319 196 /******************************************************************************
mbed_official 52:a51c77007319 197 * INTERRUPTS HANDLING
mbed_official 52:a51c77007319 198 ******************************************************************************/
mbed_official 52:a51c77007319 199
mbed_official 52:a51c77007319 200 // not api
mbed_official 55:3b765ca737a5 201 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 55:3b765ca737a5 202 if (serial_irq_ids[id] != 0) {
mbed_official 55:3b765ca737a5 203 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 55:3b765ca737a5 204 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 55:3b765ca737a5 205 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 52:a51c77007319 206 }
mbed_official 52:a51c77007319 207 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 55:3b765ca737a5 208 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 55:3b765ca737a5 209 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 52:a51c77007319 210 }
mbed_official 52:a51c77007319 211 }
mbed_official 52:a51c77007319 212 }
mbed_official 52:a51c77007319 213
mbed_official 167:d5744491c362 214 static void uart1_irq(void) {
mbed_official 167:d5744491c362 215 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 167:d5744491c362 216 }
mbed_official 167:d5744491c362 217 static void uart2_irq(void) {
mbed_official 167:d5744491c362 218 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 167:d5744491c362 219 }
mbed_official 167:d5744491c362 220 static void uart3_irq(void) {
mbed_official 167:d5744491c362 221 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 167:d5744491c362 222 }
mbed_official 52:a51c77007319 223
mbed_official 52:a51c77007319 224 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 52:a51c77007319 225 irq_handler = handler;
mbed_official 52:a51c77007319 226 serial_irq_ids[obj->index] = id;
mbed_official 52:a51c77007319 227 }
mbed_official 52:a51c77007319 228
mbed_official 52:a51c77007319 229 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 52:a51c77007319 230 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 52:a51c77007319 231 uint32_t vector = 0;
mbed_official 52:a51c77007319 232 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 233
mbed_official 52:a51c77007319 234 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 235 irq_n = USART1_IRQn;
mbed_official 174:8bb9f3a33240 236 vector = (uint32_t)&uart1_irq;
mbed_official 52:a51c77007319 237 }
mbed_official 174:8bb9f3a33240 238
mbed_official 52:a51c77007319 239 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 240 irq_n = USART2_IRQn;
mbed_official 174:8bb9f3a33240 241 vector = (uint32_t)&uart2_irq;
mbed_official 52:a51c77007319 242 }
mbed_official 167:d5744491c362 243
mbed_official 167:d5744491c362 244 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 245 irq_n = USART3_IRQn;
mbed_official 174:8bb9f3a33240 246 vector = (uint32_t)&uart3_irq;
mbed_official 167:d5744491c362 247 }
mbed_official 174:8bb9f3a33240 248
mbed_official 52:a51c77007319 249 if (enable) {
mbed_official 174:8bb9f3a33240 250
mbed_official 52:a51c77007319 251 if (irq == RxIrq) {
mbed_official 52:a51c77007319 252 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 174:8bb9f3a33240 253 } else { // TxIrq
mbed_official 55:3b765ca737a5 254 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 174:8bb9f3a33240 255 }
mbed_official 174:8bb9f3a33240 256
mbed_official 52:a51c77007319 257 NVIC_SetVector(irq_n, vector);
mbed_official 52:a51c77007319 258 NVIC_EnableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 259
mbed_official 52:a51c77007319 260 } else { // disable
mbed_official 174:8bb9f3a33240 261
mbed_official 52:a51c77007319 262 int all_disabled = 0;
mbed_official 174:8bb9f3a33240 263
mbed_official 52:a51c77007319 264 if (irq == RxIrq) {
mbed_official 52:a51c77007319 265 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 52:a51c77007319 266 // Check if TxIrq is disabled too
mbed_official 52:a51c77007319 267 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 174:8bb9f3a33240 268 } else { // TxIrq
mbed_official 52:a51c77007319 269 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 52:a51c77007319 270 // Check if RxIrq is disabled too
mbed_official 174:8bb9f3a33240 271 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 52:a51c77007319 272 }
mbed_official 174:8bb9f3a33240 273
mbed_official 52:a51c77007319 274 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 275
mbed_official 174:8bb9f3a33240 276 }
mbed_official 52:a51c77007319 277 }
mbed_official 52:a51c77007319 278
mbed_official 52:a51c77007319 279 /******************************************************************************
mbed_official 52:a51c77007319 280 * READ/WRITE
mbed_official 52:a51c77007319 281 ******************************************************************************/
mbed_official 52:a51c77007319 282
mbed_official 52:a51c77007319 283 int serial_getc(serial_t *obj) {
mbed_official 52:a51c77007319 284 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 285 while (!serial_readable(obj));
mbed_official 52:a51c77007319 286 return (int)(USART_ReceiveData(usart));
mbed_official 52:a51c77007319 287 }
mbed_official 52:a51c77007319 288
mbed_official 52:a51c77007319 289 void serial_putc(serial_t *obj, int c) {
mbed_official 52:a51c77007319 290 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 291 while (!serial_writable(obj));
mbed_official 52:a51c77007319 292 USART_SendData(usart, (uint16_t)c);
mbed_official 52:a51c77007319 293 }
mbed_official 52:a51c77007319 294
mbed_official 52:a51c77007319 295 int serial_readable(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 received
mbed_official 52:a51c77007319 299 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != 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 int serial_writable(serial_t *obj) {
mbed_official 52:a51c77007319 304 int status;
mbed_official 52:a51c77007319 305 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 306 // Check if data is transmitted
mbed_official 52:a51c77007319 307 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 308 return status;
mbed_official 52:a51c77007319 309 }
mbed_official 52:a51c77007319 310
mbed_official 52:a51c77007319 311 void serial_clear(serial_t *obj) {
mbed_official 52:a51c77007319 312 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 313 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 52:a51c77007319 314 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 52:a51c77007319 315 }
mbed_official 52:a51c77007319 316
mbed_official 52:a51c77007319 317 void serial_pinout_tx(PinName tx) {
mbed_official 52:a51c77007319 318 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 319 }
mbed_official 52:a51c77007319 320
mbed_official 52:a51c77007319 321 void serial_break_set(serial_t *obj) {
mbed_official 52:a51c77007319 322 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 323 USART_SendBreak(usart);
mbed_official 52:a51c77007319 324 }
mbed_official 52:a51c77007319 325
mbed_official 52:a51c77007319 326 void serial_break_clear(serial_t *obj) {
mbed_official 52:a51c77007319 327 }
mbed_official 174:8bb9f3a33240 328
mbed_official 174:8bb9f3a33240 329 #endif