Peter Drescher / mbed-F401

mbed library with additional peripherals for ST F401 board

Fork of mbed-src by mbed official

This mbed LIB has additional peripherals for ST F401 board

  • UART2 : PA_3 rx, PA_2 tx
  • UART3 : PC_7 rx, PC_6 tx
  • I2C2 : PB_3 SDA, PB_10 SCL
  • I2C3 : PB_4 SDA, PA_8 SCL

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/serial_api.c@76:aeb1df146756, 2014-01-27 (annotated)

Committer:
mbed_official
Date:
Mon Jan 27 14:30:07 2014 +0000
Revision:
76:aeb1df146756
Synchronized with git revision a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd



Full URL: https://github.com/mbedmicro/mbed/commit/a31ec9c5f7bcb5c8a1b2eced103f6a1dfa921abd/



Add NUCLEO_L152RE

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 76:aeb1df146756 1 /* mbed Microcontroller Library
mbed_official 76:aeb1df146756 2 *******************************************************************************
mbed_official 76:aeb1df146756 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 76:aeb1df146756 4 * All rights reserved.
mbed_official 76:aeb1df146756 5 *
mbed_official 76:aeb1df146756 6 * Redistribution and use in source and binary forms, with or without
mbed_official 76:aeb1df146756 7 * modification, are permitted provided that the following conditions are met:
mbed_official 76:aeb1df146756 8 *
mbed_official 76:aeb1df146756 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 76:aeb1df146756 10 * this list of conditions and the following disclaimer.
mbed_official 76:aeb1df146756 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 76:aeb1df146756 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 76:aeb1df146756 13 * and/or other materials provided with the distribution.
mbed_official 76:aeb1df146756 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 76:aeb1df146756 15 * may be used to endorse or promote products derived from this software
mbed_official 76:aeb1df146756 16 * without specific prior written permission.
mbed_official 76:aeb1df146756 17 *
mbed_official 76:aeb1df146756 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 76:aeb1df146756 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 76:aeb1df146756 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 76:aeb1df146756 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 76:aeb1df146756 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 76:aeb1df146756 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 76:aeb1df146756 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 76:aeb1df146756 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 76:aeb1df146756 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 76:aeb1df146756 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 76:aeb1df146756 28 *******************************************************************************
mbed_official 76:aeb1df146756 29 */
mbed_official 76:aeb1df146756 30 #include "serial_api.h"
mbed_official 76:aeb1df146756 31 #include "cmsis.h"
mbed_official 76:aeb1df146756 32 #include "pinmap.h"
mbed_official 76:aeb1df146756 33 #include "error.h"
mbed_official 76:aeb1df146756 34 #include <string.h>
mbed_official 76:aeb1df146756 35
mbed_official 76:aeb1df146756 36 static const PinMap PinMap_UART_TX[] = {
mbed_official 76:aeb1df146756 37 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 76:aeb1df146756 38 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART2)},
mbed_official 76:aeb1df146756 39 {NC, NC, 0}
mbed_official 76:aeb1df146756 40 };
mbed_official 76:aeb1df146756 41
mbed_official 76:aeb1df146756 42 static const PinMap PinMap_UART_RX[] = {
mbed_official 76:aeb1df146756 43 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 76:aeb1df146756 44 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART2)},
mbed_official 76:aeb1df146756 45 {NC, NC, 0}
mbed_official 76:aeb1df146756 46 };
mbed_official 76:aeb1df146756 47
mbed_official 76:aeb1df146756 48 #define UART_NUM (2)
mbed_official 76:aeb1df146756 49
mbed_official 76:aeb1df146756 50 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 76:aeb1df146756 51
mbed_official 76:aeb1df146756 52 static uart_irq_handler irq_handler;
mbed_official 76:aeb1df146756 53
mbed_official 76:aeb1df146756 54 int stdio_uart_inited = 0;
mbed_official 76:aeb1df146756 55 serial_t stdio_uart;
mbed_official 76:aeb1df146756 56
mbed_official 76:aeb1df146756 57 static void init_usart(serial_t *obj) {
mbed_official 76:aeb1df146756 58 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 59 USART_InitTypeDef USART_InitStructure;
mbed_official 76:aeb1df146756 60
mbed_official 76:aeb1df146756 61 USART_Cmd(usart, DISABLE);
mbed_official 76:aeb1df146756 62
mbed_official 76:aeb1df146756 63 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 76:aeb1df146756 64 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 76:aeb1df146756 65 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 76:aeb1df146756 66 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 76:aeb1df146756 67 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 76:aeb1df146756 68 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 76:aeb1df146756 69 USART_Init(usart, &USART_InitStructure);
mbed_official 76:aeb1df146756 70
mbed_official 76:aeb1df146756 71 USART_Cmd(usart, ENABLE);
mbed_official 76:aeb1df146756 72 }
mbed_official 76:aeb1df146756 73
mbed_official 76:aeb1df146756 74 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 76:aeb1df146756 75 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 76:aeb1df146756 76 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 77 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 76:aeb1df146756 78
mbed_official 76:aeb1df146756 79 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 76:aeb1df146756 80 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 76:aeb1df146756 81
mbed_official 76:aeb1df146756 82 if (obj->uart == (UARTName)NC) {
mbed_official 76:aeb1df146756 83 error("Serial pinout mapping failed");
mbed_official 76:aeb1df146756 84 }
mbed_official 76:aeb1df146756 85
mbed_official 76:aeb1df146756 86 // Enable USART clock
mbed_official 76:aeb1df146756 87 if (obj->uart == UART_1) {
mbed_official 76:aeb1df146756 88 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 76:aeb1df146756 89 }
mbed_official 76:aeb1df146756 90 if (obj->uart == UART_2) {
mbed_official 76:aeb1df146756 91 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 76:aeb1df146756 92 }
mbed_official 76:aeb1df146756 93
mbed_official 76:aeb1df146756 94 // Configure the UART pins
mbed_official 76:aeb1df146756 95 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 96 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 76:aeb1df146756 97 pin_mode(tx, PullUp);
mbed_official 76:aeb1df146756 98 pin_mode(rx, PullUp);
mbed_official 76:aeb1df146756 99
mbed_official 76:aeb1df146756 100 // Configure UART
mbed_official 76:aeb1df146756 101 obj->baudrate = 9600;
mbed_official 76:aeb1df146756 102 obj->databits = USART_WordLength_8b;
mbed_official 76:aeb1df146756 103 obj->stopbits = USART_StopBits_1;
mbed_official 76:aeb1df146756 104 obj->parity = USART_Parity_No;
mbed_official 76:aeb1df146756 105
mbed_official 76:aeb1df146756 106 init_usart(obj);
mbed_official 76:aeb1df146756 107
mbed_official 76:aeb1df146756 108 // The index is used by irq
mbed_official 76:aeb1df146756 109 if (obj->uart == UART_1) obj->index = 0;
mbed_official 76:aeb1df146756 110 if (obj->uart == UART_2) obj->index = 1;
mbed_official 76:aeb1df146756 111
mbed_official 76:aeb1df146756 112 // For stdio management
mbed_official 76:aeb1df146756 113 if (obj->uart == STDIO_UART) {
mbed_official 76:aeb1df146756 114 stdio_uart_inited = 1;
mbed_official 76:aeb1df146756 115 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 76:aeb1df146756 116 }
mbed_official 76:aeb1df146756 117
mbed_official 76:aeb1df146756 118 }
mbed_official 76:aeb1df146756 119
mbed_official 76:aeb1df146756 120 void serial_free(serial_t *obj) {
mbed_official 76:aeb1df146756 121 serial_irq_ids[obj->index] = 0;
mbed_official 76:aeb1df146756 122 }
mbed_official 76:aeb1df146756 123
mbed_official 76:aeb1df146756 124 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 76:aeb1df146756 125 obj->baudrate = baudrate;
mbed_official 76:aeb1df146756 126 init_usart(obj);
mbed_official 76:aeb1df146756 127 }
mbed_official 76:aeb1df146756 128
mbed_official 76:aeb1df146756 129 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 76:aeb1df146756 130 if (data_bits == 8) {
mbed_official 76:aeb1df146756 131 obj->databits = USART_WordLength_8b;
mbed_official 76:aeb1df146756 132 }
mbed_official 76:aeb1df146756 133 else {
mbed_official 76:aeb1df146756 134 obj->databits = USART_WordLength_9b;
mbed_official 76:aeb1df146756 135 }
mbed_official 76:aeb1df146756 136
mbed_official 76:aeb1df146756 137 switch (parity) {
mbed_official 76:aeb1df146756 138 case ParityOdd:
mbed_official 76:aeb1df146756 139 case ParityForced0:
mbed_official 76:aeb1df146756 140 obj->parity = USART_Parity_Odd;
mbed_official 76:aeb1df146756 141 break;
mbed_official 76:aeb1df146756 142 case ParityEven:
mbed_official 76:aeb1df146756 143 case ParityForced1:
mbed_official 76:aeb1df146756 144 obj->parity = USART_Parity_Even;
mbed_official 76:aeb1df146756 145 break;
mbed_official 76:aeb1df146756 146 default: // ParityNone
mbed_official 76:aeb1df146756 147 obj->parity = USART_Parity_No;
mbed_official 76:aeb1df146756 148 break;
mbed_official 76:aeb1df146756 149 }
mbed_official 76:aeb1df146756 150
mbed_official 76:aeb1df146756 151 if (stop_bits == 2) {
mbed_official 76:aeb1df146756 152 obj->stopbits = USART_StopBits_2;
mbed_official 76:aeb1df146756 153 }
mbed_official 76:aeb1df146756 154 else {
mbed_official 76:aeb1df146756 155 obj->stopbits = USART_StopBits_1;
mbed_official 76:aeb1df146756 156 }
mbed_official 76:aeb1df146756 157
mbed_official 76:aeb1df146756 158 init_usart(obj);
mbed_official 76:aeb1df146756 159 }
mbed_official 76:aeb1df146756 160
mbed_official 76:aeb1df146756 161 /******************************************************************************
mbed_official 76:aeb1df146756 162 * INTERRUPTS HANDLING
mbed_official 76:aeb1df146756 163 ******************************************************************************/
mbed_official 76:aeb1df146756 164
mbed_official 76:aeb1df146756 165 // not api
mbed_official 76:aeb1df146756 166 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 76:aeb1df146756 167 if (serial_irq_ids[id] != 0) {
mbed_official 76:aeb1df146756 168 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 76:aeb1df146756 169 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 76:aeb1df146756 170 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 76:aeb1df146756 171 }
mbed_official 76:aeb1df146756 172 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 76:aeb1df146756 173 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 76:aeb1df146756 174 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 76:aeb1df146756 175 }
mbed_official 76:aeb1df146756 176 }
mbed_official 76:aeb1df146756 177 }
mbed_official 76:aeb1df146756 178
mbed_official 76:aeb1df146756 179 static void uart1_irq(void) {uart_irq((USART_TypeDef*)UART_1, 0);}
mbed_official 76:aeb1df146756 180 static void uart2_irq(void) {uart_irq((USART_TypeDef*)UART_2, 1);}
mbed_official 76:aeb1df146756 181
mbed_official 76:aeb1df146756 182 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 76:aeb1df146756 183 irq_handler = handler;
mbed_official 76:aeb1df146756 184 serial_irq_ids[obj->index] = id;
mbed_official 76:aeb1df146756 185 }
mbed_official 76:aeb1df146756 186
mbed_official 76:aeb1df146756 187 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 76:aeb1df146756 188 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 76:aeb1df146756 189 uint32_t vector = 0;
mbed_official 76:aeb1df146756 190 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 191
mbed_official 76:aeb1df146756 192 if (obj->uart == UART_1) {
mbed_official 76:aeb1df146756 193 irq_n = USART1_IRQn;
mbed_official 76:aeb1df146756 194 vector = (uint32_t)&uart1_irq;
mbed_official 76:aeb1df146756 195 }
mbed_official 76:aeb1df146756 196
mbed_official 76:aeb1df146756 197 if (obj->uart == UART_2) {
mbed_official 76:aeb1df146756 198 irq_n = USART2_IRQn;
mbed_official 76:aeb1df146756 199 vector = (uint32_t)&uart2_irq;
mbed_official 76:aeb1df146756 200 }
mbed_official 76:aeb1df146756 201
mbed_official 76:aeb1df146756 202 if (enable) {
mbed_official 76:aeb1df146756 203
mbed_official 76:aeb1df146756 204 if (irq == RxIrq) {
mbed_official 76:aeb1df146756 205 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 76:aeb1df146756 206 }
mbed_official 76:aeb1df146756 207 else { // TxIrq
mbed_official 76:aeb1df146756 208 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 76:aeb1df146756 209 }
mbed_official 76:aeb1df146756 210
mbed_official 76:aeb1df146756 211 NVIC_SetVector(irq_n, vector);
mbed_official 76:aeb1df146756 212 NVIC_EnableIRQ(irq_n);
mbed_official 76:aeb1df146756 213
mbed_official 76:aeb1df146756 214 } else { // disable
mbed_official 76:aeb1df146756 215
mbed_official 76:aeb1df146756 216 int all_disabled = 0;
mbed_official 76:aeb1df146756 217
mbed_official 76:aeb1df146756 218 if (irq == RxIrq) {
mbed_official 76:aeb1df146756 219 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 76:aeb1df146756 220 // Check if TxIrq is disabled too
mbed_official 76:aeb1df146756 221 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 76:aeb1df146756 222 }
mbed_official 76:aeb1df146756 223 else { // TxIrq
mbed_official 76:aeb1df146756 224 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 76:aeb1df146756 225 // Check if RxIrq is disabled too
mbed_official 76:aeb1df146756 226 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 76:aeb1df146756 227 }
mbed_official 76:aeb1df146756 228
mbed_official 76:aeb1df146756 229 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 76:aeb1df146756 230
mbed_official 76:aeb1df146756 231 }
mbed_official 76:aeb1df146756 232 }
mbed_official 76:aeb1df146756 233
mbed_official 76:aeb1df146756 234 /******************************************************************************
mbed_official 76:aeb1df146756 235 * READ/WRITE
mbed_official 76:aeb1df146756 236 ******************************************************************************/
mbed_official 76:aeb1df146756 237
mbed_official 76:aeb1df146756 238 int serial_getc(serial_t *obj) {
mbed_official 76:aeb1df146756 239 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 240 while (!serial_readable(obj));
mbed_official 76:aeb1df146756 241 return (int)(USART_ReceiveData(usart));
mbed_official 76:aeb1df146756 242 }
mbed_official 76:aeb1df146756 243
mbed_official 76:aeb1df146756 244 void serial_putc(serial_t *obj, int c) {
mbed_official 76:aeb1df146756 245 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 246 while (!serial_writable(obj));
mbed_official 76:aeb1df146756 247 USART_SendData(usart, (uint16_t)c);
mbed_official 76:aeb1df146756 248 }
mbed_official 76:aeb1df146756 249
mbed_official 76:aeb1df146756 250 int serial_readable(serial_t *obj) {
mbed_official 76:aeb1df146756 251 int status;
mbed_official 76:aeb1df146756 252 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 253 // Check if data is received
mbed_official 76:aeb1df146756 254 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 76:aeb1df146756 255 return status;
mbed_official 76:aeb1df146756 256 }
mbed_official 76:aeb1df146756 257
mbed_official 76:aeb1df146756 258 int serial_writable(serial_t *obj) {
mbed_official 76:aeb1df146756 259 int status;
mbed_official 76:aeb1df146756 260 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 261 // Check if data is transmitted
mbed_official 76:aeb1df146756 262 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 76:aeb1df146756 263 return status;
mbed_official 76:aeb1df146756 264 }
mbed_official 76:aeb1df146756 265
mbed_official 76:aeb1df146756 266 void serial_clear(serial_t *obj) {
mbed_official 76:aeb1df146756 267 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 268 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 76:aeb1df146756 269 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 76:aeb1df146756 270 }
mbed_official 76:aeb1df146756 271
mbed_official 76:aeb1df146756 272 void serial_pinout_tx(PinName tx) {
mbed_official 76:aeb1df146756 273 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 274 }
mbed_official 76:aeb1df146756 275
mbed_official 76:aeb1df146756 276 void serial_break_set(serial_t *obj) {
mbed_official 76:aeb1df146756 277 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 278 USART_SendBreak(usart);
mbed_official 76:aeb1df146756 279 }
mbed_official 76:aeb1df146756 280
mbed_official 76:aeb1df146756 281 void serial_break_clear(serial_t *obj) {
mbed_official 76:aeb1df146756 282 }