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_F302R8/serial_api.c@135:067cc8ba23da, 2014-03-25 (annotated)

Committer:
mbed_official
Date:
Tue Mar 25 10:15:07 2014 +0000
Revision:
135:067cc8ba23da
Parent:
125:23cc3068a9e4
Child:
162:937d965048d3
Synchronized with git revision 11bc6fdd038cd58284639ec6ff158b57e4b4bf68



Full URL: https://github.com/mbedmicro/mbed/commit/11bc6fdd038cd58284639ec6ff158b57e4b4bf68/



[NUCLEO_F302R8] Improvements in clock configuration, spi default pins, code formatting

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 125:23cc3068a9e4 1 /* mbed Microcontroller Library
mbed_official 125:23cc3068a9e4 2 *******************************************************************************
mbed_official 125:23cc3068a9e4 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 125:23cc3068a9e4 4 * All rights reserved.
mbed_official 125:23cc3068a9e4 5 *
mbed_official 125:23cc3068a9e4 6 * Redistribution and use in source and binary forms, with or without
mbed_official 125:23cc3068a9e4 7 * modification, are permitted provided that the following conditions are met:
mbed_official 125:23cc3068a9e4 8 *
mbed_official 125:23cc3068a9e4 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 125:23cc3068a9e4 10 * this list of conditions and the following disclaimer.
mbed_official 125:23cc3068a9e4 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 125:23cc3068a9e4 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 125:23cc3068a9e4 13 * and/or other materials provided with the distribution.
mbed_official 125:23cc3068a9e4 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 125:23cc3068a9e4 15 * may be used to endorse or promote products derived from this software
mbed_official 125:23cc3068a9e4 16 * without specific prior written permission.
mbed_official 125:23cc3068a9e4 17 *
mbed_official 125:23cc3068a9e4 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 125:23cc3068a9e4 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 125:23cc3068a9e4 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 125:23cc3068a9e4 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 125:23cc3068a9e4 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 125:23cc3068a9e4 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 125:23cc3068a9e4 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 125:23cc3068a9e4 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 125:23cc3068a9e4 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 125:23cc3068a9e4 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 125:23cc3068a9e4 28 *******************************************************************************
mbed_official 125:23cc3068a9e4 29 */
mbed_official 125:23cc3068a9e4 30 #include "serial_api.h"
mbed_official 125:23cc3068a9e4 31 #include "cmsis.h"
mbed_official 125:23cc3068a9e4 32 #include "pinmap.h"
mbed_official 125:23cc3068a9e4 33 #include "error.h"
mbed_official 125:23cc3068a9e4 34 #include <string.h>
mbed_official 125:23cc3068a9e4 35
mbed_official 125:23cc3068a9e4 36 static const PinMap PinMap_UART_TX[] = {
mbed_official 125:23cc3068a9e4 37 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 38 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 39 {PA_14, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 40 {PB_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 41 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 42 {PB_9, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 43 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 44 {PC_4, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 45 {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 46 {NC, NC, 0}
mbed_official 125:23cc3068a9e4 47 };
mbed_official 125:23cc3068a9e4 48
mbed_official 125:23cc3068a9e4 49 static const PinMap PinMap_UART_RX[] = {
mbed_official 125:23cc3068a9e4 50 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 51 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 52 {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 53 {PB_4, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 54 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 55 {PB_8, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 56 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 57 {PC_5, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 58 {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 125:23cc3068a9e4 59 {NC, NC, 0}
mbed_official 125:23cc3068a9e4 60 };
mbed_official 125:23cc3068a9e4 61
mbed_official 125:23cc3068a9e4 62 #define UART_NUM (2)
mbed_official 125:23cc3068a9e4 63
mbed_official 125:23cc3068a9e4 64 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 125:23cc3068a9e4 65
mbed_official 125:23cc3068a9e4 66 static uart_irq_handler irq_handler;
mbed_official 125:23cc3068a9e4 67
mbed_official 125:23cc3068a9e4 68 int stdio_uart_inited = 0;
mbed_official 125:23cc3068a9e4 69 serial_t stdio_uart;
mbed_official 125:23cc3068a9e4 70
mbed_official 125:23cc3068a9e4 71 static void init_usart(serial_t *obj) {
mbed_official 125:23cc3068a9e4 72 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 73 USART_InitTypeDef USART_InitStructure;
mbed_official 135:067cc8ba23da 74
mbed_official 125:23cc3068a9e4 75 USART_Cmd(usart, DISABLE);
mbed_official 125:23cc3068a9e4 76
mbed_official 125:23cc3068a9e4 77 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 125:23cc3068a9e4 78 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 125:23cc3068a9e4 79 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 125:23cc3068a9e4 80 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 125:23cc3068a9e4 81 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 125:23cc3068a9e4 82 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 125:23cc3068a9e4 83 USART_Init(usart, &USART_InitStructure);
mbed_official 135:067cc8ba23da 84
mbed_official 125:23cc3068a9e4 85 USART_Cmd(usart, ENABLE);
mbed_official 125:23cc3068a9e4 86 }
mbed_official 125:23cc3068a9e4 87
mbed_official 135:067cc8ba23da 88 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 125:23cc3068a9e4 89 // Determine the UART to use
mbed_official 125:23cc3068a9e4 90 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 125:23cc3068a9e4 91 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 135:067cc8ba23da 92
mbed_official 125:23cc3068a9e4 93 // Get the peripheral name from the pin and assign it to the object
mbed_official 125:23cc3068a9e4 94 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 125:23cc3068a9e4 95
mbed_official 125:23cc3068a9e4 96 if (obj->uart == (UARTName)NC) {
mbed_official 125:23cc3068a9e4 97 error("Serial pinout mapping failed");
mbed_official 125:23cc3068a9e4 98 }
mbed_official 125:23cc3068a9e4 99
mbed_official 125:23cc3068a9e4 100 // Enable USART clock
mbed_official 125:23cc3068a9e4 101 if (obj->uart == UART_1) {
mbed_official 135:067cc8ba23da 102 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 125:23cc3068a9e4 103 }
mbed_official 125:23cc3068a9e4 104 if (obj->uart == UART_2) {
mbed_official 135:067cc8ba23da 105 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 125:23cc3068a9e4 106 }
mbed_official 125:23cc3068a9e4 107 if (obj->uart == UART_3) {
mbed_official 135:067cc8ba23da 108 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 125:23cc3068a9e4 109 }
mbed_official 135:067cc8ba23da 110
mbed_official 125:23cc3068a9e4 111 // Configure the UART pins
mbed_official 125:23cc3068a9e4 112 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 125:23cc3068a9e4 113 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 125:23cc3068a9e4 114 pin_mode(tx, PullUp);
mbed_official 125:23cc3068a9e4 115 pin_mode(rx, PullUp);
mbed_official 125:23cc3068a9e4 116
mbed_official 125:23cc3068a9e4 117 // Configure UART
mbed_official 125:23cc3068a9e4 118 obj->baudrate = 9600;
mbed_official 125:23cc3068a9e4 119 obj->databits = USART_WordLength_8b;
mbed_official 125:23cc3068a9e4 120 obj->stopbits = USART_StopBits_1;
mbed_official 135:067cc8ba23da 121 obj->parity = USART_Parity_No;
mbed_official 125:23cc3068a9e4 122
mbed_official 125:23cc3068a9e4 123 init_usart(obj);
mbed_official 125:23cc3068a9e4 124
mbed_official 125:23cc3068a9e4 125 // The index is used by irq
mbed_official 125:23cc3068a9e4 126 if (obj->uart == UART_1) obj->index = 0;
mbed_official 125:23cc3068a9e4 127 if (obj->uart == UART_2) obj->index = 1;
mbed_official 125:23cc3068a9e4 128 if (obj->uart == UART_3) obj->index = 2;
mbed_official 135:067cc8ba23da 129
mbed_official 125:23cc3068a9e4 130 // For stdio management
mbed_official 125:23cc3068a9e4 131 if (obj->uart == STDIO_UART) {
mbed_official 125:23cc3068a9e4 132 stdio_uart_inited = 1;
mbed_official 125:23cc3068a9e4 133 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 125:23cc3068a9e4 134 }
mbed_official 135:067cc8ba23da 135
mbed_official 125:23cc3068a9e4 136 }
mbed_official 125:23cc3068a9e4 137
mbed_official 125:23cc3068a9e4 138 void serial_free(serial_t *obj) {
mbed_official 125:23cc3068a9e4 139 serial_irq_ids[obj->index] = 0;
mbed_official 125:23cc3068a9e4 140 }
mbed_official 125:23cc3068a9e4 141
mbed_official 125:23cc3068a9e4 142 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 125:23cc3068a9e4 143 obj->baudrate = baudrate;
mbed_official 125:23cc3068a9e4 144 init_usart(obj);
mbed_official 125:23cc3068a9e4 145 }
mbed_official 125:23cc3068a9e4 146
mbed_official 125:23cc3068a9e4 147 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 125:23cc3068a9e4 148 if (data_bits == 8) {
mbed_official 125:23cc3068a9e4 149 obj->databits = USART_WordLength_8b;
mbed_official 135:067cc8ba23da 150 } else {
mbed_official 125:23cc3068a9e4 151 obj->databits = USART_WordLength_9b;
mbed_official 125:23cc3068a9e4 152 }
mbed_official 125:23cc3068a9e4 153
mbed_official 125:23cc3068a9e4 154 switch (parity) {
mbed_official 135:067cc8ba23da 155 case ParityOdd:
mbed_official 135:067cc8ba23da 156 case ParityForced0:
mbed_official 135:067cc8ba23da 157 obj->parity = USART_Parity_Odd;
mbed_official 135:067cc8ba23da 158 break;
mbed_official 135:067cc8ba23da 159 case ParityEven:
mbed_official 135:067cc8ba23da 160 case ParityForced1:
mbed_official 135:067cc8ba23da 161 obj->parity = USART_Parity_Even;
mbed_official 135:067cc8ba23da 162 break;
mbed_official 135:067cc8ba23da 163 default: // ParityNone
mbed_official 135:067cc8ba23da 164 obj->parity = USART_Parity_No;
mbed_official 135:067cc8ba23da 165 break;
mbed_official 125:23cc3068a9e4 166 }
mbed_official 135:067cc8ba23da 167
mbed_official 125:23cc3068a9e4 168 if (stop_bits == 2) {
mbed_official 125:23cc3068a9e4 169 obj->stopbits = USART_StopBits_2;
mbed_official 135:067cc8ba23da 170 } else {
mbed_official 125:23cc3068a9e4 171 obj->stopbits = USART_StopBits_1;
mbed_official 125:23cc3068a9e4 172 }
mbed_official 125:23cc3068a9e4 173
mbed_official 125:23cc3068a9e4 174 init_usart(obj);
mbed_official 125:23cc3068a9e4 175 }
mbed_official 125:23cc3068a9e4 176
mbed_official 125:23cc3068a9e4 177 /******************************************************************************
mbed_official 125:23cc3068a9e4 178 * INTERRUPTS HANDLING
mbed_official 125:23cc3068a9e4 179 ******************************************************************************/
mbed_official 125:23cc3068a9e4 180
mbed_official 125:23cc3068a9e4 181 // not api
mbed_official 125:23cc3068a9e4 182 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 125:23cc3068a9e4 183 if (serial_irq_ids[id] != 0) {
mbed_official 125:23cc3068a9e4 184 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 125:23cc3068a9e4 185 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 125:23cc3068a9e4 186 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 125:23cc3068a9e4 187 }
mbed_official 125:23cc3068a9e4 188 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 125:23cc3068a9e4 189 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 125:23cc3068a9e4 190 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 125:23cc3068a9e4 191 }
mbed_official 125:23cc3068a9e4 192 }
mbed_official 125:23cc3068a9e4 193 }
mbed_official 125:23cc3068a9e4 194
mbed_official 135:067cc8ba23da 195 static void uart1_irq(void) {
mbed_official 135:067cc8ba23da 196 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 135:067cc8ba23da 197 }
mbed_official 135:067cc8ba23da 198 static void uart2_irq(void) {
mbed_official 135:067cc8ba23da 199 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 135:067cc8ba23da 200 }
mbed_official 135:067cc8ba23da 201 static void uart3_irq(void) {
mbed_official 135:067cc8ba23da 202 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 135:067cc8ba23da 203 }
mbed_official 125:23cc3068a9e4 204
mbed_official 125:23cc3068a9e4 205 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 125:23cc3068a9e4 206 irq_handler = handler;
mbed_official 125:23cc3068a9e4 207 serial_irq_ids[obj->index] = id;
mbed_official 125:23cc3068a9e4 208 }
mbed_official 125:23cc3068a9e4 209
mbed_official 125:23cc3068a9e4 210 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 125:23cc3068a9e4 211 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 125:23cc3068a9e4 212 uint32_t vector = 0;
mbed_official 125:23cc3068a9e4 213 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 214
mbed_official 125:23cc3068a9e4 215 if (obj->uart == UART_1) {
mbed_official 135:067cc8ba23da 216 irq_n = USART1_IRQn;
mbed_official 135:067cc8ba23da 217 vector = (uint32_t)&uart1_irq;
mbed_official 125:23cc3068a9e4 218 }
mbed_official 125:23cc3068a9e4 219
mbed_official 125:23cc3068a9e4 220 if (obj->uart == UART_2) {
mbed_official 135:067cc8ba23da 221 irq_n = USART2_IRQn;
mbed_official 135:067cc8ba23da 222 vector = (uint32_t)&uart2_irq;
mbed_official 125:23cc3068a9e4 223 }
mbed_official 125:23cc3068a9e4 224
mbed_official 125:23cc3068a9e4 225 if (obj->uart == UART_3) {
mbed_official 135:067cc8ba23da 226 irq_n = USART3_IRQn;
mbed_official 135:067cc8ba23da 227 vector = (uint32_t)&uart3_irq;
mbed_official 125:23cc3068a9e4 228 }
mbed_official 125:23cc3068a9e4 229
mbed_official 125:23cc3068a9e4 230 if (enable) {
mbed_official 135:067cc8ba23da 231
mbed_official 125:23cc3068a9e4 232 if (irq == RxIrq) {
mbed_official 125:23cc3068a9e4 233 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 135:067cc8ba23da 234 } else { // TxIrq
mbed_official 125:23cc3068a9e4 235 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 135:067cc8ba23da 236 }
mbed_official 135:067cc8ba23da 237
mbed_official 125:23cc3068a9e4 238 NVIC_SetVector(irq_n, vector);
mbed_official 125:23cc3068a9e4 239 NVIC_EnableIRQ(irq_n);
mbed_official 135:067cc8ba23da 240
mbed_official 125:23cc3068a9e4 241 } else { // disable
mbed_official 135:067cc8ba23da 242
mbed_official 125:23cc3068a9e4 243 int all_disabled = 0;
mbed_official 135:067cc8ba23da 244
mbed_official 125:23cc3068a9e4 245 if (irq == RxIrq) {
mbed_official 125:23cc3068a9e4 246 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 125:23cc3068a9e4 247 // Check if TxIrq is disabled too
mbed_official 125:23cc3068a9e4 248 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 135:067cc8ba23da 249 } else { // TxIrq
mbed_official 125:23cc3068a9e4 250 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 125:23cc3068a9e4 251 // Check if RxIrq is disabled too
mbed_official 135:067cc8ba23da 252 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 125:23cc3068a9e4 253 }
mbed_official 135:067cc8ba23da 254
mbed_official 125:23cc3068a9e4 255 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 135:067cc8ba23da 256
mbed_official 135:067cc8ba23da 257 }
mbed_official 125:23cc3068a9e4 258 }
mbed_official 125:23cc3068a9e4 259
mbed_official 125:23cc3068a9e4 260 /******************************************************************************
mbed_official 125:23cc3068a9e4 261 * READ/WRITE
mbed_official 125:23cc3068a9e4 262 ******************************************************************************/
mbed_official 125:23cc3068a9e4 263
mbed_official 125:23cc3068a9e4 264 int serial_getc(serial_t *obj) {
mbed_official 125:23cc3068a9e4 265 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 266 while (!serial_readable(obj));
mbed_official 125:23cc3068a9e4 267 return (int)(USART_ReceiveData(usart));
mbed_official 125:23cc3068a9e4 268 }
mbed_official 125:23cc3068a9e4 269
mbed_official 125:23cc3068a9e4 270 void serial_putc(serial_t *obj, int c) {
mbed_official 125:23cc3068a9e4 271 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 272 while (!serial_writable(obj));
mbed_official 125:23cc3068a9e4 273 USART_SendData(usart, (uint16_t)c);
mbed_official 125:23cc3068a9e4 274 }
mbed_official 125:23cc3068a9e4 275
mbed_official 125:23cc3068a9e4 276 int serial_readable(serial_t *obj) {
mbed_official 125:23cc3068a9e4 277 int status;
mbed_official 125:23cc3068a9e4 278 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 279 // Check if data is received
mbed_official 125:23cc3068a9e4 280 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 125:23cc3068a9e4 281 return status;
mbed_official 125:23cc3068a9e4 282 }
mbed_official 125:23cc3068a9e4 283
mbed_official 125:23cc3068a9e4 284 int serial_writable(serial_t *obj) {
mbed_official 125:23cc3068a9e4 285 int status;
mbed_official 125:23cc3068a9e4 286 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 287 // Check if data is transmitted
mbed_official 125:23cc3068a9e4 288 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 125:23cc3068a9e4 289 return status;
mbed_official 125:23cc3068a9e4 290 }
mbed_official 125:23cc3068a9e4 291
mbed_official 125:23cc3068a9e4 292 void serial_clear(serial_t *obj) {
mbed_official 125:23cc3068a9e4 293 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 294 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 125:23cc3068a9e4 295 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 125:23cc3068a9e4 296 }
mbed_official 125:23cc3068a9e4 297
mbed_official 125:23cc3068a9e4 298 void serial_pinout_tx(PinName tx) {
mbed_official 125:23cc3068a9e4 299 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 125:23cc3068a9e4 300 }
mbed_official 125:23cc3068a9e4 301
mbed_official 125:23cc3068a9e4 302 void serial_break_set(serial_t *obj) {
mbed_official 125:23cc3068a9e4 303 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 304 USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE);
mbed_official 125:23cc3068a9e4 305 }
mbed_official 125:23cc3068a9e4 306
mbed_official 125:23cc3068a9e4 307 void serial_break_clear(serial_t *obj) {
mbed_official 125:23cc3068a9e4 308 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 125:23cc3068a9e4 309 USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE);
mbed_official 125:23cc3068a9e4 310 USART_ClearFlag(usart, USART_FLAG_SBK);
mbed_official 125:23cc3068a9e4 311 }