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_F103RB/serial_api.c@70:c1fbde68b492, 2014-01-07 (annotated)

Committer:
mbed_official
Date:
Tue Jan 07 11:00:05 2014 +0000
Revision:
70:c1fbde68b492
Parent:
56:99eb381a3269 
Synchronized with git revision 3f438a307904431f2782db3c8fa49946b9fc1d85



Full URL: https://github.com/mbedmicro/mbed/commit/3f438a307904431f2782db3c8fa49946b9fc1d85/



[NUCLEO_F103RB] license text changed + sleep hal updated

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 52:a51c77007319 30 #include "serial_api.h"
mbed_official 52:a51c77007319 31 #include "cmsis.h"
mbed_official 52:a51c77007319 32 #include "pinmap.h"
mbed_official 52:a51c77007319 33 #include "error.h"
mbed_official 52:a51c77007319 34 #include <string.h>
mbed_official 52:a51c77007319 35
mbed_official 52:a51c77007319 36 static const PinMap PinMap_UART_TX[] = {
mbed_official 52:a51c77007319 37 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)},
mbed_official 52:a51c77007319 38 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF_PP, 0)},
mbed_official 52:a51c77007319 39 {NC, NC, 0}
mbed_official 52:a51c77007319 40 };
mbed_official 52:a51c77007319 41
mbed_official 52:a51c77007319 42 static const PinMap PinMap_UART_RX[] = {
mbed_official 52:a51c77007319 43 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)},
mbed_official 52:a51c77007319 44 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_IN_FLOATING, 0)},
mbed_official 52:a51c77007319 45 {NC, NC, 0}
mbed_official 52:a51c77007319 46 };
mbed_official 52:a51c77007319 47
mbed_official 52:a51c77007319 48 #define UART_NUM (2)
mbed_official 52:a51c77007319 49
mbed_official 52:a51c77007319 50 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 52:a51c77007319 51
mbed_official 52:a51c77007319 52 static uart_irq_handler irq_handler;
mbed_official 52:a51c77007319 53
mbed_official 52:a51c77007319 54 int stdio_uart_inited = 0;
mbed_official 52:a51c77007319 55 serial_t stdio_uart;
mbed_official 52:a51c77007319 56
mbed_official 56:99eb381a3269 57 static void init_usart(serial_t *obj) {
mbed_official 56:99eb381a3269 58 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 59 USART_InitTypeDef USART_InitStructure;
mbed_official 52:a51c77007319 60
mbed_official 56:99eb381a3269 61 USART_Cmd(usart, DISABLE);
mbed_official 56:99eb381a3269 62
mbed_official 56:99eb381a3269 63 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 56:99eb381a3269 64 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 56:99eb381a3269 65 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 56:99eb381a3269 66 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 56:99eb381a3269 67 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 56:99eb381a3269 68 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 56:99eb381a3269 69 USART_Init(usart, &USART_InitStructure);
mbed_official 56:99eb381a3269 70
mbed_official 56:99eb381a3269 71 USART_Cmd(usart, ENABLE);
mbed_official 56:99eb381a3269 72 }
mbed_official 56:99eb381a3269 73
mbed_official 56:99eb381a3269 74 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 52:a51c77007319 75 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 52:a51c77007319 76 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 77 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 52:a51c77007319 78
mbed_official 52:a51c77007319 79 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 52:a51c77007319 80 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 52:a51c77007319 81
mbed_official 52:a51c77007319 82 if (obj->uart == (UARTName)NC) {
mbed_official 52:a51c77007319 83 error("Serial pinout mapping failed");
mbed_official 52:a51c77007319 84 }
mbed_official 56:99eb381a3269 85
mbed_official 52:a51c77007319 86 // Enable USART clock
mbed_official 52:a51c77007319 87 if (obj->uart == UART_1) {
mbed_official 52:a51c77007319 88 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 52:a51c77007319 89 }
mbed_official 52:a51c77007319 90 if (obj->uart == UART_2) {
mbed_official 52:a51c77007319 91 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 52:a51c77007319 92 }
mbed_official 52:a51c77007319 93
mbed_official 52:a51c77007319 94 // Configure the UART pins
mbed_official 52:a51c77007319 95 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 96 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 52:a51c77007319 97
mbed_official 52:a51c77007319 98 // Configure UART
mbed_official 52:a51c77007319 99 obj->baudrate = 9600;
mbed_official 52:a51c77007319 100 obj->databits = USART_WordLength_8b;
mbed_official 52:a51c77007319 101 obj->stopbits = USART_StopBits_1;
mbed_official 52:a51c77007319 102 obj->parity = USART_Parity_No;
mbed_official 52:a51c77007319 103
mbed_official 56:99eb381a3269 104 init_usart(obj);
mbed_official 52:a51c77007319 105
mbed_official 52:a51c77007319 106 // The index is used by irq
mbed_official 52:a51c77007319 107 if (obj->uart == UART_1) obj->index = 0;
mbed_official 52:a51c77007319 108 if (obj->uart == UART_2) obj->index = 1;
mbed_official 52:a51c77007319 109
mbed_official 52:a51c77007319 110 // For stdio management
mbed_official 52:a51c77007319 111 if (obj->uart == STDIO_UART) {
mbed_official 52:a51c77007319 112 stdio_uart_inited = 1;
mbed_official 52:a51c77007319 113 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 52:a51c77007319 114 }
mbed_official 52:a51c77007319 115
mbed_official 52:a51c77007319 116 }
mbed_official 52:a51c77007319 117
mbed_official 52:a51c77007319 118 void serial_free(serial_t *obj) {
mbed_official 52:a51c77007319 119 serial_irq_ids[obj->index] = 0;
mbed_official 52:a51c77007319 120 }
mbed_official 52:a51c77007319 121
mbed_official 52:a51c77007319 122 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 52:a51c77007319 123 obj->baudrate = baudrate;
mbed_official 56:99eb381a3269 124 init_usart(obj);
mbed_official 52:a51c77007319 125 }
mbed_official 52:a51c77007319 126
mbed_official 52:a51c77007319 127 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 52:a51c77007319 128 if (data_bits == 8) {
mbed_official 52:a51c77007319 129 obj->databits = USART_WordLength_8b;
mbed_official 52:a51c77007319 130 }
mbed_official 52:a51c77007319 131 else {
mbed_official 52:a51c77007319 132 obj->databits = USART_WordLength_9b;
mbed_official 52:a51c77007319 133 }
mbed_official 52:a51c77007319 134
mbed_official 52:a51c77007319 135 switch (parity) {
mbed_official 52:a51c77007319 136 case ParityOdd:
mbed_official 52:a51c77007319 137 case ParityForced0:
mbed_official 52:a51c77007319 138 obj->parity = USART_Parity_Odd;
mbed_official 52:a51c77007319 139 break;
mbed_official 52:a51c77007319 140 case ParityEven:
mbed_official 52:a51c77007319 141 case ParityForced1:
mbed_official 52:a51c77007319 142 obj->parity = USART_Parity_Even;
mbed_official 52:a51c77007319 143 break;
mbed_official 52:a51c77007319 144 default: // ParityNone
mbed_official 52:a51c77007319 145 obj->parity = USART_Parity_No;
mbed_official 52:a51c77007319 146 break;
mbed_official 52:a51c77007319 147 }
mbed_official 52:a51c77007319 148
mbed_official 52:a51c77007319 149 if (stop_bits == 2) {
mbed_official 52:a51c77007319 150 obj->stopbits = USART_StopBits_2;
mbed_official 52:a51c77007319 151 }
mbed_official 52:a51c77007319 152 else {
mbed_official 52:a51c77007319 153 obj->stopbits = USART_StopBits_1;
mbed_official 52:a51c77007319 154 }
mbed_official 52:a51c77007319 155
mbed_official 56:99eb381a3269 156 init_usart(obj);
mbed_official 52:a51c77007319 157 }
mbed_official 52:a51c77007319 158
mbed_official 52:a51c77007319 159 /******************************************************************************
mbed_official 52:a51c77007319 160 * INTERRUPTS HANDLING
mbed_official 52:a51c77007319 161 ******************************************************************************/
mbed_official 52:a51c77007319 162
mbed_official 52:a51c77007319 163 // not api
mbed_official 55:3b765ca737a5 164 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 55:3b765ca737a5 165 if (serial_irq_ids[id] != 0) {
mbed_official 55:3b765ca737a5 166 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 55:3b765ca737a5 167 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 55:3b765ca737a5 168 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 52:a51c77007319 169 }
mbed_official 52:a51c77007319 170 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 55:3b765ca737a5 171 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 55:3b765ca737a5 172 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 52:a51c77007319 173 }
mbed_official 52:a51c77007319 174 }
mbed_official 52:a51c77007319 175 }
mbed_official 52:a51c77007319 176
mbed_official 55:3b765ca737a5 177 static void uart1_irq(void) {uart_irq((USART_TypeDef*)UART_1, 0);}
mbed_official 55:3b765ca737a5 178 static void uart2_irq(void) {uart_irq((USART_TypeDef*)UART_2, 1);}
mbed_official 52:a51c77007319 179
mbed_official 52:a51c77007319 180 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 52:a51c77007319 181 irq_handler = handler;
mbed_official 52:a51c77007319 182 serial_irq_ids[obj->index] = id;
mbed_official 52:a51c77007319 183 }
mbed_official 52:a51c77007319 184
mbed_official 52:a51c77007319 185 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 52:a51c77007319 186 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 52:a51c77007319 187 uint32_t vector = 0;
mbed_official 52:a51c77007319 188 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 189
mbed_official 52:a51c77007319 190 if (obj->uart == UART_1) {
mbed_official 52:a51c77007319 191 irq_n = USART1_IRQn;
mbed_official 52:a51c77007319 192 vector = (uint32_t)&uart1_irq;
mbed_official 52:a51c77007319 193 }
mbed_official 52:a51c77007319 194
mbed_official 52:a51c77007319 195 if (obj->uart == UART_2) {
mbed_official 52:a51c77007319 196 irq_n = USART2_IRQn;
mbed_official 52:a51c77007319 197 vector = (uint32_t)&uart2_irq;
mbed_official 52:a51c77007319 198 }
mbed_official 52:a51c77007319 199
mbed_official 52:a51c77007319 200 if (enable) {
mbed_official 52:a51c77007319 201
mbed_official 52:a51c77007319 202 if (irq == RxIrq) {
mbed_official 52:a51c77007319 203 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 52:a51c77007319 204 }
mbed_official 52:a51c77007319 205 else { // TxIrq
mbed_official 55:3b765ca737a5 206 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 52:a51c77007319 207 }
mbed_official 52:a51c77007319 208
mbed_official 52:a51c77007319 209 NVIC_SetVector(irq_n, vector);
mbed_official 52:a51c77007319 210 NVIC_EnableIRQ(irq_n);
mbed_official 52:a51c77007319 211
mbed_official 52:a51c77007319 212 } else { // disable
mbed_official 52:a51c77007319 213
mbed_official 52:a51c77007319 214 int all_disabled = 0;
mbed_official 52:a51c77007319 215
mbed_official 52:a51c77007319 216 if (irq == RxIrq) {
mbed_official 52:a51c77007319 217 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 52:a51c77007319 218 // Check if TxIrq is disabled too
mbed_official 52:a51c77007319 219 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 52:a51c77007319 220 }
mbed_official 52:a51c77007319 221 else { // TxIrq
mbed_official 52:a51c77007319 222 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 52:a51c77007319 223 // Check if RxIrq is disabled too
mbed_official 52:a51c77007319 224 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 52:a51c77007319 225 }
mbed_official 52:a51c77007319 226
mbed_official 52:a51c77007319 227 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 52:a51c77007319 228
mbed_official 52:a51c77007319 229 }
mbed_official 52:a51c77007319 230 }
mbed_official 52:a51c77007319 231
mbed_official 52:a51c77007319 232 /******************************************************************************
mbed_official 52:a51c77007319 233 * READ/WRITE
mbed_official 52:a51c77007319 234 ******************************************************************************/
mbed_official 52:a51c77007319 235
mbed_official 52:a51c77007319 236 int serial_getc(serial_t *obj) {
mbed_official 52:a51c77007319 237 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 238 while (!serial_readable(obj));
mbed_official 52:a51c77007319 239 return (int)(USART_ReceiveData(usart));
mbed_official 52:a51c77007319 240 }
mbed_official 52:a51c77007319 241
mbed_official 52:a51c77007319 242 void serial_putc(serial_t *obj, int c) {
mbed_official 52:a51c77007319 243 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 244 while (!serial_writable(obj));
mbed_official 52:a51c77007319 245 USART_SendData(usart, (uint16_t)c);
mbed_official 52:a51c77007319 246 }
mbed_official 52:a51c77007319 247
mbed_official 52:a51c77007319 248 int serial_readable(serial_t *obj) {
mbed_official 52:a51c77007319 249 int status;
mbed_official 52:a51c77007319 250 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 251 // Check if data is received
mbed_official 52:a51c77007319 252 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 253 return status;
mbed_official 52:a51c77007319 254 }
mbed_official 52:a51c77007319 255
mbed_official 52:a51c77007319 256 int serial_writable(serial_t *obj) {
mbed_official 52:a51c77007319 257 int status;
mbed_official 52:a51c77007319 258 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 259 // Check if data is transmitted
mbed_official 52:a51c77007319 260 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 52:a51c77007319 261 return status;
mbed_official 52:a51c77007319 262 }
mbed_official 52:a51c77007319 263
mbed_official 52:a51c77007319 264 void serial_clear(serial_t *obj) {
mbed_official 52:a51c77007319 265 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 266 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 52:a51c77007319 267 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 52:a51c77007319 268 }
mbed_official 52:a51c77007319 269
mbed_official 52:a51c77007319 270 void serial_pinout_tx(PinName tx) {
mbed_official 52:a51c77007319 271 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 52:a51c77007319 272 }
mbed_official 52:a51c77007319 273
mbed_official 52:a51c77007319 274 void serial_break_set(serial_t *obj) {
mbed_official 52:a51c77007319 275 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 52:a51c77007319 276 USART_SendBreak(usart);
mbed_official 52:a51c77007319 277 }
mbed_official 52:a51c77007319 278
mbed_official 52:a51c77007319 279 void serial_break_clear(serial_t *obj) {
mbed_official 52:a51c77007319 280 }