Ken Todotani / mbed-src

mbed library sources

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F407VG/serial_api.c@133:d4dda5c437f0, 2014-03-24 (annotated)

Committer:
mbed_official
Date:
Mon Mar 24 17:45:07 2014 +0000
Revision:
133:d4dda5c437f0
Child:
227:7bd0639b8911
Synchronized with git revision 47b961246bed973fe4cb8932781ffc8025b78a61



Full URL: https://github.com/mbedmicro/mbed/commit/47b961246bed973fe4cb8932781ffc8025b78a61/



[STM32F4-Discovery (STM32F407VG)] initial port

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 133:d4dda5c437f0 1 /* mbed Microcontroller Library
mbed_official 133:d4dda5c437f0 2 *******************************************************************************
mbed_official 133:d4dda5c437f0 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 133:d4dda5c437f0 4 * All rights reserved.
mbed_official 133:d4dda5c437f0 5 *
mbed_official 133:d4dda5c437f0 6 * Redistribution and use in source and binary forms, with or without
mbed_official 133:d4dda5c437f0 7 * modification, are permitted provided that the following conditions are met:
mbed_official 133:d4dda5c437f0 8 *
mbed_official 133:d4dda5c437f0 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 133:d4dda5c437f0 10 * this list of conditions and the following disclaimer.
mbed_official 133:d4dda5c437f0 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 133:d4dda5c437f0 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 133:d4dda5c437f0 13 * and/or other materials provided with the distribution.
mbed_official 133:d4dda5c437f0 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 133:d4dda5c437f0 15 * may be used to endorse or promote products derived from this software
mbed_official 133:d4dda5c437f0 16 * without specific prior written permission.
mbed_official 133:d4dda5c437f0 17 *
mbed_official 133:d4dda5c437f0 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 133:d4dda5c437f0 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 133:d4dda5c437f0 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 133:d4dda5c437f0 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 133:d4dda5c437f0 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 133:d4dda5c437f0 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 133:d4dda5c437f0 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 133:d4dda5c437f0 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 133:d4dda5c437f0 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 133:d4dda5c437f0 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 133:d4dda5c437f0 28 *******************************************************************************
mbed_official 133:d4dda5c437f0 29 */
mbed_official 133:d4dda5c437f0 30 #include "serial_api.h"
mbed_official 133:d4dda5c437f0 31 #include "cmsis.h"
mbed_official 133:d4dda5c437f0 32 #include "pinmap.h"
mbed_official 133:d4dda5c437f0 33 #include "error.h"
mbed_official 133:d4dda5c437f0 34 #include <string.h>
mbed_official 133:d4dda5c437f0 35 #include "stm32f4xx_hal.h"
mbed_official 133:d4dda5c437f0 36
mbed_official 133:d4dda5c437f0 37 static const PinMap PinMap_UART_TX[] = {
mbed_official 133:d4dda5c437f0 38 {PA_2, UART_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
mbed_official 133:d4dda5c437f0 39 {PA_9, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
mbed_official 133:d4dda5c437f0 40 {PA_11, UART_6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
mbed_official 133:d4dda5c437f0 41 {PB_6, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
mbed_official 133:d4dda5c437f0 42 {PC_6, UART_6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
mbed_official 133:d4dda5c437f0 43 {NC, NC, 0}
mbed_official 133:d4dda5c437f0 44 };
mbed_official 133:d4dda5c437f0 45
mbed_official 133:d4dda5c437f0 46 static const PinMap PinMap_UART_RX[] = {
mbed_official 133:d4dda5c437f0 47 {PA_3, UART_2, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART2)},
mbed_official 133:d4dda5c437f0 48 {PA_10, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
mbed_official 133:d4dda5c437f0 49 {PA_12, UART_6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
mbed_official 133:d4dda5c437f0 50 {PB_7, UART_1, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF7_USART1)},
mbed_official 133:d4dda5c437f0 51 {PC_7, UART_6, STM_PIN_DATA(STM_MODE_AF_PP, GPIO_PULLUP, GPIO_AF8_USART6)},
mbed_official 133:d4dda5c437f0 52 {NC, NC, 0}
mbed_official 133:d4dda5c437f0 53 };
mbed_official 133:d4dda5c437f0 54
mbed_official 133:d4dda5c437f0 55 #define UART_NUM (3)
mbed_official 133:d4dda5c437f0 56
mbed_official 133:d4dda5c437f0 57 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 133:d4dda5c437f0 58
mbed_official 133:d4dda5c437f0 59 static uart_irq_handler irq_handler;
mbed_official 133:d4dda5c437f0 60
mbed_official 133:d4dda5c437f0 61 UART_HandleTypeDef UartHandle;
mbed_official 133:d4dda5c437f0 62
mbed_official 133:d4dda5c437f0 63 int stdio_uart_inited = 0;
mbed_official 133:d4dda5c437f0 64 serial_t stdio_uart;
mbed_official 133:d4dda5c437f0 65
mbed_official 133:d4dda5c437f0 66 static void init_uart(serial_t *obj) {
mbed_official 133:d4dda5c437f0 67 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 68
mbed_official 133:d4dda5c437f0 69 UartHandle.Init.BaudRate = obj->baudrate;
mbed_official 133:d4dda5c437f0 70 UartHandle.Init.WordLength = obj->databits;
mbed_official 133:d4dda5c437f0 71 UartHandle.Init.StopBits = obj->stopbits;
mbed_official 133:d4dda5c437f0 72 UartHandle.Init.Parity = obj->parity;
mbed_official 133:d4dda5c437f0 73 UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
mbed_official 133:d4dda5c437f0 74 UartHandle.Init.Mode = UART_MODE_TX_RX;
mbed_official 133:d4dda5c437f0 75
mbed_official 133:d4dda5c437f0 76 HAL_UART_Init(&UartHandle);
mbed_official 133:d4dda5c437f0 77 }
mbed_official 133:d4dda5c437f0 78
mbed_official 133:d4dda5c437f0 79 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 133:d4dda5c437f0 80 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 133:d4dda5c437f0 81 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 133:d4dda5c437f0 82 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 133:d4dda5c437f0 83
mbed_official 133:d4dda5c437f0 84 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 133:d4dda5c437f0 85 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 133:d4dda5c437f0 86
mbed_official 133:d4dda5c437f0 87 if (obj->uart == (UARTName)NC) {
mbed_official 133:d4dda5c437f0 88 error("Serial error: pinout mapping failed.");
mbed_official 133:d4dda5c437f0 89 }
mbed_official 133:d4dda5c437f0 90
mbed_official 133:d4dda5c437f0 91 // Enable USART clock
mbed_official 133:d4dda5c437f0 92 if (obj->uart == UART_1) {
mbed_official 133:d4dda5c437f0 93 __USART1_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 94 }
mbed_official 133:d4dda5c437f0 95 if (obj->uart == UART_2) {
mbed_official 133:d4dda5c437f0 96 __USART2_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 97 }
mbed_official 133:d4dda5c437f0 98 if (obj->uart == UART_6) {
mbed_official 133:d4dda5c437f0 99 __USART6_CLK_ENABLE();
mbed_official 133:d4dda5c437f0 100 }
mbed_official 133:d4dda5c437f0 101
mbed_official 133:d4dda5c437f0 102 // Configure the UART pins
mbed_official 133:d4dda5c437f0 103 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 133:d4dda5c437f0 104 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 133:d4dda5c437f0 105 pin_mode(tx, PullUp);
mbed_official 133:d4dda5c437f0 106 pin_mode(rx, PullUp);
mbed_official 133:d4dda5c437f0 107
mbed_official 133:d4dda5c437f0 108 // Configure UART
mbed_official 133:d4dda5c437f0 109 obj->baudrate = 9600;
mbed_official 133:d4dda5c437f0 110 obj->databits = UART_WORDLENGTH_8B;
mbed_official 133:d4dda5c437f0 111 obj->stopbits = UART_STOPBITS_1;
mbed_official 133:d4dda5c437f0 112 obj->parity = UART_PARITY_NONE;
mbed_official 133:d4dda5c437f0 113
mbed_official 133:d4dda5c437f0 114 init_uart(obj);
mbed_official 133:d4dda5c437f0 115
mbed_official 133:d4dda5c437f0 116 // The index is used by irq
mbed_official 133:d4dda5c437f0 117 if (obj->uart == UART_1) obj->index = 0;
mbed_official 133:d4dda5c437f0 118 if (obj->uart == UART_2) obj->index = 1;
mbed_official 133:d4dda5c437f0 119 if (obj->uart == UART_6) obj->index = 2;
mbed_official 133:d4dda5c437f0 120
mbed_official 133:d4dda5c437f0 121 // For stdio management
mbed_official 133:d4dda5c437f0 122 if (obj->uart == STDIO_UART) {
mbed_official 133:d4dda5c437f0 123 stdio_uart_inited = 1;
mbed_official 133:d4dda5c437f0 124 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 133:d4dda5c437f0 125 }
mbed_official 133:d4dda5c437f0 126
mbed_official 133:d4dda5c437f0 127 }
mbed_official 133:d4dda5c437f0 128
mbed_official 133:d4dda5c437f0 129 void serial_free(serial_t *obj) {
mbed_official 133:d4dda5c437f0 130 serial_irq_ids[obj->index] = 0;
mbed_official 133:d4dda5c437f0 131 }
mbed_official 133:d4dda5c437f0 132
mbed_official 133:d4dda5c437f0 133 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 133:d4dda5c437f0 134 obj->baudrate = baudrate;
mbed_official 133:d4dda5c437f0 135 init_uart(obj);
mbed_official 133:d4dda5c437f0 136 }
mbed_official 133:d4dda5c437f0 137
mbed_official 133:d4dda5c437f0 138 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 133:d4dda5c437f0 139 if (data_bits == 8) {
mbed_official 133:d4dda5c437f0 140 obj->databits = UART_WORDLENGTH_8B;
mbed_official 133:d4dda5c437f0 141 }
mbed_official 133:d4dda5c437f0 142 else {
mbed_official 133:d4dda5c437f0 143 obj->databits = UART_WORDLENGTH_9B;
mbed_official 133:d4dda5c437f0 144 }
mbed_official 133:d4dda5c437f0 145
mbed_official 133:d4dda5c437f0 146 switch (parity) {
mbed_official 133:d4dda5c437f0 147 case ParityOdd:
mbed_official 133:d4dda5c437f0 148 case ParityForced0:
mbed_official 133:d4dda5c437f0 149 obj->parity = UART_PARITY_ODD;
mbed_official 133:d4dda5c437f0 150 break;
mbed_official 133:d4dda5c437f0 151 case ParityEven:
mbed_official 133:d4dda5c437f0 152 case ParityForced1:
mbed_official 133:d4dda5c437f0 153 obj->parity = UART_PARITY_EVEN;
mbed_official 133:d4dda5c437f0 154 break;
mbed_official 133:d4dda5c437f0 155 default: // ParityNone
mbed_official 133:d4dda5c437f0 156 obj->parity = UART_PARITY_NONE;
mbed_official 133:d4dda5c437f0 157 break;
mbed_official 133:d4dda5c437f0 158 }
mbed_official 133:d4dda5c437f0 159
mbed_official 133:d4dda5c437f0 160 if (stop_bits == 2) {
mbed_official 133:d4dda5c437f0 161 obj->stopbits = UART_STOPBITS_2;
mbed_official 133:d4dda5c437f0 162 }
mbed_official 133:d4dda5c437f0 163 else {
mbed_official 133:d4dda5c437f0 164 obj->stopbits = UART_STOPBITS_1;
mbed_official 133:d4dda5c437f0 165 }
mbed_official 133:d4dda5c437f0 166
mbed_official 133:d4dda5c437f0 167 init_uart(obj);
mbed_official 133:d4dda5c437f0 168 }
mbed_official 133:d4dda5c437f0 169
mbed_official 133:d4dda5c437f0 170 /******************************************************************************
mbed_official 133:d4dda5c437f0 171 * INTERRUPTS HANDLING
mbed_official 133:d4dda5c437f0 172 ******************************************************************************/
mbed_official 133:d4dda5c437f0 173
mbed_official 133:d4dda5c437f0 174 // Not part of mbed api
mbed_official 133:d4dda5c437f0 175 static void uart_irq(UARTName name, int id) {
mbed_official 133:d4dda5c437f0 176 UartHandle.Instance = (USART_TypeDef *)name;
mbed_official 133:d4dda5c437f0 177
mbed_official 133:d4dda5c437f0 178 if (serial_irq_ids[id] != 0) {
mbed_official 133:d4dda5c437f0 179 if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TC) != RESET) {
mbed_official 133:d4dda5c437f0 180 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 133:d4dda5c437f0 181 __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TC);
mbed_official 133:d4dda5c437f0 182 }
mbed_official 133:d4dda5c437f0 183 if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) {
mbed_official 133:d4dda5c437f0 184 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 133:d4dda5c437f0 185 __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);
mbed_official 133:d4dda5c437f0 186 }
mbed_official 133:d4dda5c437f0 187 }
mbed_official 133:d4dda5c437f0 188 }
mbed_official 133:d4dda5c437f0 189
mbed_official 133:d4dda5c437f0 190 // Not part of mbed api
mbed_official 133:d4dda5c437f0 191 static void uart1_irq(void) {uart_irq(UART_1, 0);}
mbed_official 133:d4dda5c437f0 192 static void uart2_irq(void) {uart_irq(UART_2, 1);}
mbed_official 133:d4dda5c437f0 193 static void uart6_irq(void) {uart_irq(UART_6, 2);}
mbed_official 133:d4dda5c437f0 194
mbed_official 133:d4dda5c437f0 195 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 133:d4dda5c437f0 196 irq_handler = handler;
mbed_official 133:d4dda5c437f0 197 serial_irq_ids[obj->index] = id;
mbed_official 133:d4dda5c437f0 198 }
mbed_official 133:d4dda5c437f0 199
mbed_official 133:d4dda5c437f0 200 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 133:d4dda5c437f0 201 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 133:d4dda5c437f0 202 uint32_t vector = 0;
mbed_official 133:d4dda5c437f0 203
mbed_official 133:d4dda5c437f0 204 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 205
mbed_official 133:d4dda5c437f0 206 if (obj->uart == UART_1) {
mbed_official 133:d4dda5c437f0 207 irq_n = USART1_IRQn;
mbed_official 133:d4dda5c437f0 208 vector = (uint32_t)&uart1_irq;
mbed_official 133:d4dda5c437f0 209 }
mbed_official 133:d4dda5c437f0 210
mbed_official 133:d4dda5c437f0 211 if (obj->uart == UART_2) {
mbed_official 133:d4dda5c437f0 212 irq_n = USART2_IRQn;
mbed_official 133:d4dda5c437f0 213 vector = (uint32_t)&uart2_irq;
mbed_official 133:d4dda5c437f0 214 }
mbed_official 133:d4dda5c437f0 215
mbed_official 133:d4dda5c437f0 216 if (obj->uart == UART_6) {
mbed_official 133:d4dda5c437f0 217 irq_n = USART6_IRQn;
mbed_official 133:d4dda5c437f0 218 vector = (uint32_t)&uart6_irq;
mbed_official 133:d4dda5c437f0 219 }
mbed_official 133:d4dda5c437f0 220
mbed_official 133:d4dda5c437f0 221 if (enable) {
mbed_official 133:d4dda5c437f0 222
mbed_official 133:d4dda5c437f0 223 if (irq == RxIrq) {
mbed_official 133:d4dda5c437f0 224 __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE);
mbed_official 133:d4dda5c437f0 225 }
mbed_official 133:d4dda5c437f0 226 else { // TxIrq
mbed_official 133:d4dda5c437f0 227 __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_TC);
mbed_official 133:d4dda5c437f0 228 }
mbed_official 133:d4dda5c437f0 229
mbed_official 133:d4dda5c437f0 230 NVIC_SetVector(irq_n, vector);
mbed_official 133:d4dda5c437f0 231 NVIC_EnableIRQ(irq_n);
mbed_official 133:d4dda5c437f0 232
mbed_official 133:d4dda5c437f0 233 } else { // disable
mbed_official 133:d4dda5c437f0 234
mbed_official 133:d4dda5c437f0 235 int all_disabled = 0;
mbed_official 133:d4dda5c437f0 236
mbed_official 133:d4dda5c437f0 237 if (irq == RxIrq) {
mbed_official 133:d4dda5c437f0 238 __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_RXNE);
mbed_official 133:d4dda5c437f0 239 // Check if TxIrq is disabled too
mbed_official 133:d4dda5c437f0 240 if ((UartHandle.Instance->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 133:d4dda5c437f0 241 }
mbed_official 133:d4dda5c437f0 242 else { // TxIrq
mbed_official 133:d4dda5c437f0 243 __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_TXE);
mbed_official 133:d4dda5c437f0 244 // Check if RxIrq is disabled too
mbed_official 133:d4dda5c437f0 245 if ((UartHandle.Instance->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 133:d4dda5c437f0 246 }
mbed_official 133:d4dda5c437f0 247
mbed_official 133:d4dda5c437f0 248 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 133:d4dda5c437f0 249
mbed_official 133:d4dda5c437f0 250 }
mbed_official 133:d4dda5c437f0 251 }
mbed_official 133:d4dda5c437f0 252
mbed_official 133:d4dda5c437f0 253 /******************************************************************************
mbed_official 133:d4dda5c437f0 254 * READ/WRITE
mbed_official 133:d4dda5c437f0 255 ******************************************************************************/
mbed_official 133:d4dda5c437f0 256
mbed_official 133:d4dda5c437f0 257 int serial_getc(serial_t *obj) {
mbed_official 133:d4dda5c437f0 258 USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 259 while (!serial_readable(obj));
mbed_official 133:d4dda5c437f0 260 return (int)(uart->DR & 0x1FF);
mbed_official 133:d4dda5c437f0 261 }
mbed_official 133:d4dda5c437f0 262
mbed_official 133:d4dda5c437f0 263 void serial_putc(serial_t *obj, int c) {
mbed_official 133:d4dda5c437f0 264 USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 265 while (!serial_writable(obj));
mbed_official 133:d4dda5c437f0 266 uart->DR = (uint32_t)(c & 0x1FF);
mbed_official 133:d4dda5c437f0 267 }
mbed_official 133:d4dda5c437f0 268
mbed_official 133:d4dda5c437f0 269 int serial_readable(serial_t *obj) {
mbed_official 133:d4dda5c437f0 270 int status;
mbed_official 133:d4dda5c437f0 271 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 272 // Check if data is received
mbed_official 133:d4dda5c437f0 273 status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 133:d4dda5c437f0 274 return status;
mbed_official 133:d4dda5c437f0 275 }
mbed_official 133:d4dda5c437f0 276
mbed_official 133:d4dda5c437f0 277 int serial_writable(serial_t *obj) {
mbed_official 133:d4dda5c437f0 278 int status;
mbed_official 133:d4dda5c437f0 279 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 280 // Check if data is transmitted
mbed_official 133:d4dda5c437f0 281 status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 133:d4dda5c437f0 282 return status;
mbed_official 133:d4dda5c437f0 283 }
mbed_official 133:d4dda5c437f0 284
mbed_official 133:d4dda5c437f0 285 void serial_clear(serial_t *obj) {
mbed_official 133:d4dda5c437f0 286 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 287 __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_TXE);
mbed_official 133:d4dda5c437f0 288 __HAL_UART_CLEAR_FLAG(&UartHandle, UART_FLAG_RXNE);
mbed_official 133:d4dda5c437f0 289 }
mbed_official 133:d4dda5c437f0 290
mbed_official 133:d4dda5c437f0 291 void serial_pinout_tx(PinName tx) {
mbed_official 133:d4dda5c437f0 292 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 133:d4dda5c437f0 293 }
mbed_official 133:d4dda5c437f0 294
mbed_official 133:d4dda5c437f0 295 void serial_break_set(serial_t *obj) {
mbed_official 133:d4dda5c437f0 296 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
mbed_official 133:d4dda5c437f0 297 HAL_LIN_SendBreak(&UartHandle);
mbed_official 133:d4dda5c437f0 298 }
mbed_official 133:d4dda5c437f0 299
mbed_official 133:d4dda5c437f0 300 void serial_break_clear(serial_t *obj) {
mbed_official 133:d4dda5c437f0 301 }