Bob Seque / mbed-dev

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Fork of mbed-dev by mbed official

targets/hal/TARGET_STM/TARGET_STM32F3XX/serial_api.c@57:dd901dec6bd0, 2016-01-30 (annotated)

Committer:
Splith
Date:
Sat Jan 30 16:48:54 2016 +0000
Revision:
57:dd901dec6bd0
Parent:
0:9b334a45a8ff 
Add USART3 pin mapping to Seeed arch max

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2014, STMicroelectronics
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 31 #include "serial_api.h"
bogdanm 0:9b334a45a8ff 32 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 33 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 34 #include <string.h>
bogdanm 0:9b334a45a8ff 35
bogdanm 0:9b334a45a8ff 36 static const PinMap PinMap_UART_TX[] = {
bogdanm 0:9b334a45a8ff 37 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 38 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 39 {PA_14, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 40 {PB_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 41 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 42 {PB_9, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 43 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 44 {PC_4, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 45 {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 46 {NC, NC, 0}
bogdanm 0:9b334a45a8ff 47 };
bogdanm 0:9b334a45a8ff 48
bogdanm 0:9b334a45a8ff 49 static const PinMap PinMap_UART_RX[] = {
bogdanm 0:9b334a45a8ff 50 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 51 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 52 {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 53 {PB_4, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 54 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 55 {PB_8, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 56 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 57 {PC_5, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 58 {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
bogdanm 0:9b334a45a8ff 59 {NC, NC, 0}
bogdanm 0:9b334a45a8ff 60 };
bogdanm 0:9b334a45a8ff 61
bogdanm 0:9b334a45a8ff 62 #define UART_NUM (2)
bogdanm 0:9b334a45a8ff 63
bogdanm 0:9b334a45a8ff 64 static uint32_t serial_irq_ids[UART_NUM] = {0};
bogdanm 0:9b334a45a8ff 65
bogdanm 0:9b334a45a8ff 66 static uart_irq_handler irq_handler;
bogdanm 0:9b334a45a8ff 67
bogdanm 0:9b334a45a8ff 68 int stdio_uart_inited = 0;
bogdanm 0:9b334a45a8ff 69 serial_t stdio_uart;
bogdanm 0:9b334a45a8ff 70
bogdanm 0:9b334a45a8ff 71 static void init_usart(serial_t *obj) {
bogdanm 0:9b334a45a8ff 72 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 73 USART_InitTypeDef USART_InitStructure;
bogdanm 0:9b334a45a8ff 74
bogdanm 0:9b334a45a8ff 75 USART_Cmd(usart, DISABLE);
bogdanm 0:9b334a45a8ff 76
bogdanm 0:9b334a45a8ff 77 USART_InitStructure.USART_BaudRate = obj->baudrate;
bogdanm 0:9b334a45a8ff 78 USART_InitStructure.USART_WordLength = obj->databits;
bogdanm 0:9b334a45a8ff 79 USART_InitStructure.USART_StopBits = obj->stopbits;
bogdanm 0:9b334a45a8ff 80 USART_InitStructure.USART_Parity = obj->parity;
bogdanm 0:9b334a45a8ff 81 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
bogdanm 0:9b334a45a8ff 82 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
bogdanm 0:9b334a45a8ff 83 USART_Init(usart, &USART_InitStructure);
bogdanm 0:9b334a45a8ff 84
bogdanm 0:9b334a45a8ff 85 USART_Cmd(usart, ENABLE);
bogdanm 0:9b334a45a8ff 86 }
bogdanm 0:9b334a45a8ff 87
bogdanm 0:9b334a45a8ff 88 void serial_init(serial_t *obj, PinName tx, PinName rx) {
bogdanm 0:9b334a45a8ff 89 // Determine the UART to use
bogdanm 0:9b334a45a8ff 90 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 91 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 // Get the peripheral name from the pin and assign it to the object
bogdanm 0:9b334a45a8ff 94 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
bogdanm 0:9b334a45a8ff 95 MBED_ASSERT(obj->uart != (UARTName)NC);
bogdanm 0:9b334a45a8ff 96
bogdanm 0:9b334a45a8ff 97 // Enable USART clock
bogdanm 0:9b334a45a8ff 98 if (obj->uart == UART_1) {
bogdanm 0:9b334a45a8ff 99 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
bogdanm 0:9b334a45a8ff 100 }
bogdanm 0:9b334a45a8ff 101 if (obj->uart == UART_2) {
bogdanm 0:9b334a45a8ff 102 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
bogdanm 0:9b334a45a8ff 103 }
bogdanm 0:9b334a45a8ff 104 if (obj->uart == UART_3) {
bogdanm 0:9b334a45a8ff 105 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
bogdanm 0:9b334a45a8ff 106 }
bogdanm 0:9b334a45a8ff 107
bogdanm 0:9b334a45a8ff 108 // Configure the UART pins
bogdanm 0:9b334a45a8ff 109 pinmap_pinout(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 110 pinmap_pinout(rx, PinMap_UART_RX);
bogdanm 0:9b334a45a8ff 111 if (tx != NC) {
bogdanm 0:9b334a45a8ff 112 pin_mode(tx, PullUp);
bogdanm 0:9b334a45a8ff 113 }
bogdanm 0:9b334a45a8ff 114 if (rx != NC) {
bogdanm 0:9b334a45a8ff 115 pin_mode(rx, PullUp);
bogdanm 0:9b334a45a8ff 116 }
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 // Configure UART
bogdanm 0:9b334a45a8ff 119 obj->baudrate = 9600;
bogdanm 0:9b334a45a8ff 120 obj->databits = USART_WordLength_8b;
bogdanm 0:9b334a45a8ff 121 obj->stopbits = USART_StopBits_1;
bogdanm 0:9b334a45a8ff 122 obj->parity = USART_Parity_No;
bogdanm 0:9b334a45a8ff 123
bogdanm 0:9b334a45a8ff 124 init_usart(obj);
bogdanm 0:9b334a45a8ff 125
bogdanm 0:9b334a45a8ff 126 // The index is used by irq
bogdanm 0:9b334a45a8ff 127 if (obj->uart == UART_1) obj->index = 0;
bogdanm 0:9b334a45a8ff 128 if (obj->uart == UART_2) obj->index = 1;
bogdanm 0:9b334a45a8ff 129 if (obj->uart == UART_3) obj->index = 2;
bogdanm 0:9b334a45a8ff 130
bogdanm 0:9b334a45a8ff 131 // For stdio management
bogdanm 0:9b334a45a8ff 132 if (obj->uart == STDIO_UART) {
bogdanm 0:9b334a45a8ff 133 stdio_uart_inited = 1;
bogdanm 0:9b334a45a8ff 134 memcpy(&stdio_uart, obj, sizeof(serial_t));
bogdanm 0:9b334a45a8ff 135 }
bogdanm 0:9b334a45a8ff 136
bogdanm 0:9b334a45a8ff 137 }
bogdanm 0:9b334a45a8ff 138
bogdanm 0:9b334a45a8ff 139 void serial_free(serial_t *obj) {
bogdanm 0:9b334a45a8ff 140 serial_irq_ids[obj->index] = 0;
bogdanm 0:9b334a45a8ff 141 }
bogdanm 0:9b334a45a8ff 142
bogdanm 0:9b334a45a8ff 143 void serial_baud(serial_t *obj, int baudrate) {
bogdanm 0:9b334a45a8ff 144 obj->baudrate = baudrate;
bogdanm 0:9b334a45a8ff 145 init_usart(obj);
bogdanm 0:9b334a45a8ff 146 }
bogdanm 0:9b334a45a8ff 147
bogdanm 0:9b334a45a8ff 148 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
bogdanm 0:9b334a45a8ff 149 if (data_bits == 8) {
bogdanm 0:9b334a45a8ff 150 obj->databits = USART_WordLength_8b;
bogdanm 0:9b334a45a8ff 151 } else {
bogdanm 0:9b334a45a8ff 152 obj->databits = USART_WordLength_9b;
bogdanm 0:9b334a45a8ff 153 }
bogdanm 0:9b334a45a8ff 154
bogdanm 0:9b334a45a8ff 155 switch (parity) {
bogdanm 0:9b334a45a8ff 156 case ParityOdd:
bogdanm 0:9b334a45a8ff 157 case ParityForced0:
bogdanm 0:9b334a45a8ff 158 obj->parity = USART_Parity_Odd;
bogdanm 0:9b334a45a8ff 159 break;
bogdanm 0:9b334a45a8ff 160 case ParityEven:
bogdanm 0:9b334a45a8ff 161 case ParityForced1:
bogdanm 0:9b334a45a8ff 162 obj->parity = USART_Parity_Even;
bogdanm 0:9b334a45a8ff 163 break;
bogdanm 0:9b334a45a8ff 164 default: // ParityNone
bogdanm 0:9b334a45a8ff 165 obj->parity = USART_Parity_No;
bogdanm 0:9b334a45a8ff 166 break;
bogdanm 0:9b334a45a8ff 167 }
bogdanm 0:9b334a45a8ff 168
bogdanm 0:9b334a45a8ff 169 if (stop_bits == 2) {
bogdanm 0:9b334a45a8ff 170 obj->stopbits = USART_StopBits_2;
bogdanm 0:9b334a45a8ff 171 } else {
bogdanm 0:9b334a45a8ff 172 obj->stopbits = USART_StopBits_1;
bogdanm 0:9b334a45a8ff 173 }
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 init_usart(obj);
bogdanm 0:9b334a45a8ff 176 }
bogdanm 0:9b334a45a8ff 177
bogdanm 0:9b334a45a8ff 178 /******************************************************************************
bogdanm 0:9b334a45a8ff 179 * INTERRUPTS HANDLING
bogdanm 0:9b334a45a8ff 180 ******************************************************************************/
bogdanm 0:9b334a45a8ff 181
bogdanm 0:9b334a45a8ff 182 // not api
bogdanm 0:9b334a45a8ff 183 static void uart_irq(USART_TypeDef* usart, int id) {
bogdanm 0:9b334a45a8ff 184 if (serial_irq_ids[id] != 0) {
bogdanm 0:9b334a45a8ff 185 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
bogdanm 0:9b334a45a8ff 186 irq_handler(serial_irq_ids[id], TxIrq);
bogdanm 0:9b334a45a8ff 187 USART_ClearITPendingBit(usart, USART_IT_TC);
bogdanm 0:9b334a45a8ff 188 }
bogdanm 0:9b334a45a8ff 189 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
bogdanm 0:9b334a45a8ff 190 irq_handler(serial_irq_ids[id], RxIrq);
bogdanm 0:9b334a45a8ff 191 USART_ClearITPendingBit(usart, USART_IT_RXNE);
bogdanm 0:9b334a45a8ff 192 }
bogdanm 0:9b334a45a8ff 193 }
bogdanm 0:9b334a45a8ff 194 }
bogdanm 0:9b334a45a8ff 195
bogdanm 0:9b334a45a8ff 196 static void uart1_irq(void) {
bogdanm 0:9b334a45a8ff 197 uart_irq((USART_TypeDef*)UART_1, 0);
bogdanm 0:9b334a45a8ff 198 }
bogdanm 0:9b334a45a8ff 199 static void uart2_irq(void) {
bogdanm 0:9b334a45a8ff 200 uart_irq((USART_TypeDef*)UART_2, 1);
bogdanm 0:9b334a45a8ff 201 }
bogdanm 0:9b334a45a8ff 202 static void uart3_irq(void) {
bogdanm 0:9b334a45a8ff 203 uart_irq((USART_TypeDef*)UART_3, 2);
bogdanm 0:9b334a45a8ff 204 }
bogdanm 0:9b334a45a8ff 205
bogdanm 0:9b334a45a8ff 206 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
bogdanm 0:9b334a45a8ff 207 irq_handler = handler;
bogdanm 0:9b334a45a8ff 208 serial_irq_ids[obj->index] = id;
bogdanm 0:9b334a45a8ff 209 }
bogdanm 0:9b334a45a8ff 210
bogdanm 0:9b334a45a8ff 211 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
bogdanm 0:9b334a45a8ff 212 IRQn_Type irq_n = (IRQn_Type)0;
bogdanm 0:9b334a45a8ff 213 uint32_t vector = 0;
bogdanm 0:9b334a45a8ff 214 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 215
bogdanm 0:9b334a45a8ff 216 if (obj->uart == UART_1) {
bogdanm 0:9b334a45a8ff 217 irq_n = USART1_IRQn;
bogdanm 0:9b334a45a8ff 218 vector = (uint32_t)&uart1_irq;
bogdanm 0:9b334a45a8ff 219 }
bogdanm 0:9b334a45a8ff 220
bogdanm 0:9b334a45a8ff 221 if (obj->uart == UART_2) {
bogdanm 0:9b334a45a8ff 222 irq_n = USART2_IRQn;
bogdanm 0:9b334a45a8ff 223 vector = (uint32_t)&uart2_irq;
bogdanm 0:9b334a45a8ff 224 }
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226 if (obj->uart == UART_3) {
bogdanm 0:9b334a45a8ff 227 irq_n = USART3_IRQn;
bogdanm 0:9b334a45a8ff 228 vector = (uint32_t)&uart3_irq;
bogdanm 0:9b334a45a8ff 229 }
bogdanm 0:9b334a45a8ff 230
bogdanm 0:9b334a45a8ff 231 if (enable) {
bogdanm 0:9b334a45a8ff 232
bogdanm 0:9b334a45a8ff 233 if (irq == RxIrq) {
bogdanm 0:9b334a45a8ff 234 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
bogdanm 0:9b334a45a8ff 235 } else { // TxIrq
bogdanm 0:9b334a45a8ff 236 USART_ITConfig(usart, USART_IT_TC, ENABLE);
bogdanm 0:9b334a45a8ff 237 }
bogdanm 0:9b334a45a8ff 238
bogdanm 0:9b334a45a8ff 239 NVIC_SetVector(irq_n, vector);
bogdanm 0:9b334a45a8ff 240 NVIC_EnableIRQ(irq_n);
bogdanm 0:9b334a45a8ff 241
bogdanm 0:9b334a45a8ff 242 } else { // disable
bogdanm 0:9b334a45a8ff 243
bogdanm 0:9b334a45a8ff 244 int all_disabled = 0;
bogdanm 0:9b334a45a8ff 245
bogdanm 0:9b334a45a8ff 246 if (irq == RxIrq) {
bogdanm 0:9b334a45a8ff 247 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
bogdanm 0:9b334a45a8ff 248 // Check if TxIrq is disabled too
bogdanm 0:9b334a45a8ff 249 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
bogdanm 0:9b334a45a8ff 250 } else { // TxIrq
bogdanm 0:9b334a45a8ff 251 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
bogdanm 0:9b334a45a8ff 252 // Check if RxIrq is disabled too
bogdanm 0:9b334a45a8ff 253 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
bogdanm 0:9b334a45a8ff 254 }
bogdanm 0:9b334a45a8ff 255
bogdanm 0:9b334a45a8ff 256 if (all_disabled) NVIC_DisableIRQ(irq_n);
bogdanm 0:9b334a45a8ff 257
bogdanm 0:9b334a45a8ff 258 }
bogdanm 0:9b334a45a8ff 259 }
bogdanm 0:9b334a45a8ff 260
bogdanm 0:9b334a45a8ff 261 /******************************************************************************
bogdanm 0:9b334a45a8ff 262 * READ/WRITE
bogdanm 0:9b334a45a8ff 263 ******************************************************************************/
bogdanm 0:9b334a45a8ff 264
bogdanm 0:9b334a45a8ff 265 int serial_getc(serial_t *obj) {
bogdanm 0:9b334a45a8ff 266 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 267 while (!serial_readable(obj));
bogdanm 0:9b334a45a8ff 268 return (int)(USART_ReceiveData(usart));
bogdanm 0:9b334a45a8ff 269 }
bogdanm 0:9b334a45a8ff 270
bogdanm 0:9b334a45a8ff 271 void serial_putc(serial_t *obj, int c) {
bogdanm 0:9b334a45a8ff 272 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 273 while (!serial_writable(obj));
bogdanm 0:9b334a45a8ff 274 USART_SendData(usart, (uint16_t)c);
bogdanm 0:9b334a45a8ff 275 }
bogdanm 0:9b334a45a8ff 276
bogdanm 0:9b334a45a8ff 277 int serial_readable(serial_t *obj) {
bogdanm 0:9b334a45a8ff 278 int status;
bogdanm 0:9b334a45a8ff 279 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 280 // Check if data is received
bogdanm 0:9b334a45a8ff 281 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
bogdanm 0:9b334a45a8ff 282 return status;
bogdanm 0:9b334a45a8ff 283 }
bogdanm 0:9b334a45a8ff 284
bogdanm 0:9b334a45a8ff 285 int serial_writable(serial_t *obj) {
bogdanm 0:9b334a45a8ff 286 int status;
bogdanm 0:9b334a45a8ff 287 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 288 // Check if data is transmitted
bogdanm 0:9b334a45a8ff 289 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
bogdanm 0:9b334a45a8ff 290 return status;
bogdanm 0:9b334a45a8ff 291 }
bogdanm 0:9b334a45a8ff 292
bogdanm 0:9b334a45a8ff 293 void serial_clear(serial_t *obj) {
bogdanm 0:9b334a45a8ff 294 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 295 USART_ClearFlag(usart, USART_FLAG_TXE);
bogdanm 0:9b334a45a8ff 296 USART_ClearFlag(usart, USART_FLAG_RXNE);
bogdanm 0:9b334a45a8ff 297 }
bogdanm 0:9b334a45a8ff 298
bogdanm 0:9b334a45a8ff 299 void serial_pinout_tx(PinName tx) {
bogdanm 0:9b334a45a8ff 300 pinmap_pinout(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 301 }
bogdanm 0:9b334a45a8ff 302
bogdanm 0:9b334a45a8ff 303 void serial_break_set(serial_t *obj) {
bogdanm 0:9b334a45a8ff 304 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 305 USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE);
bogdanm 0:9b334a45a8ff 306 }
bogdanm 0:9b334a45a8ff 307
bogdanm 0:9b334a45a8ff 308 void serial_break_clear(serial_t *obj) {
bogdanm 0:9b334a45a8ff 309 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 310 USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE);
bogdanm 0:9b334a45a8ff 311 USART_ClearFlag(usart, USART_FLAG_SBK);
bogdanm 0:9b334a45a8ff 312 }