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Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_NUCLEO_L152RE/serial_api.c@227:7bd0639b8911, 2014-06-11 (annotated)

Committer:
mbed_official
Date:
Wed Jun 11 16:00:09 2014 +0100
Revision:
227:7bd0639b8911
Parent:
215:83cf97a28428
Child:
242:7074e42da0b2
Synchronized with git revision d58d532ebc0e0a96f4fffb8edefc082b71b964af



Full URL: https://github.com/mbedmicro/mbed/commit/d58d532ebc0e0a96f4fffb8edefc082b71b964af/

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 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 76:aeb1df146756 31 #include "serial_api.h"
mbed_official 174:8bb9f3a33240 32
mbed_official 174:8bb9f3a33240 33 #if DEVICE_SERIAL
mbed_official 174:8bb9f3a33240 34
mbed_official 76:aeb1df146756 35 #include "cmsis.h"
mbed_official 76:aeb1df146756 36 #include "pinmap.h"
mbed_official 76:aeb1df146756 37 #include <string.h>
mbed_official 76:aeb1df146756 38
mbed_official 76:aeb1df146756 39 static const PinMap PinMap_UART_TX[] = {
mbed_official 129:0182c99221bc 40 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART2)},
mbed_official 76:aeb1df146756 41 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 118:b44c45162f28 42 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 118:b44c45162f28 43 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART3)},
mbed_official 174:8bb9f3a33240 44 // {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART3)},
mbed_official 129:0182c99221bc 45 {PC_10, UART_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_UART4)},
mbed_official 129:0182c99221bc 46 {PC_12, UART_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_UART5)},
mbed_official 76:aeb1df146756 47 {NC, NC, 0}
mbed_official 76:aeb1df146756 48 };
mbed_official 76:aeb1df146756 49
mbed_official 76:aeb1df146756 50 static const PinMap PinMap_UART_RX[] = {
mbed_official 129:0182c99221bc 51 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART2)},
mbed_official 76:aeb1df146756 52 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 129:0182c99221bc 53 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART1)},
mbed_official 118:b44c45162f28 54 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART3)},
mbed_official 174:8bb9f3a33240 55 // {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_USART3)},
mbed_official 118:b44c45162f28 56 {PC_11, UART_4, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_UART4)},
mbed_official 129:0182c99221bc 57 {PD_2, UART_5, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_UART5)},
mbed_official 76:aeb1df146756 58 {NC, NC, 0}
mbed_official 76:aeb1df146756 59 };
mbed_official 76:aeb1df146756 60
mbed_official 118:b44c45162f28 61 #define UART_NUM (5)
mbed_official 76:aeb1df146756 62
mbed_official 76:aeb1df146756 63 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 76:aeb1df146756 64
mbed_official 76:aeb1df146756 65 static uart_irq_handler irq_handler;
mbed_official 76:aeb1df146756 66
mbed_official 76:aeb1df146756 67 int stdio_uart_inited = 0;
mbed_official 76:aeb1df146756 68 serial_t stdio_uart;
mbed_official 76:aeb1df146756 69
mbed_official 76:aeb1df146756 70 static void init_usart(serial_t *obj) {
mbed_official 76:aeb1df146756 71 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 72 USART_InitTypeDef USART_InitStructure;
mbed_official 174:8bb9f3a33240 73
mbed_official 76:aeb1df146756 74 USART_Cmd(usart, DISABLE);
mbed_official 76:aeb1df146756 75
mbed_official 129:0182c99221bc 76 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 129:0182c99221bc 77 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 129:0182c99221bc 78 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 129:0182c99221bc 79 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 76:aeb1df146756 80 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 129:0182c99221bc 81 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 76:aeb1df146756 82 USART_Init(usart, &USART_InitStructure);
mbed_official 174:8bb9f3a33240 83
mbed_official 76:aeb1df146756 84 USART_Cmd(usart, ENABLE);
mbed_official 76:aeb1df146756 85 }
mbed_official 76:aeb1df146756 86
mbed_official 174:8bb9f3a33240 87 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 76:aeb1df146756 88 // Determine the UART to use (UART_1, UART_2, ...)
mbed_official 76:aeb1df146756 89 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 90 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 174:8bb9f3a33240 91
mbed_official 76:aeb1df146756 92 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
mbed_official 76:aeb1df146756 93 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 227:7bd0639b8911 94 MBED_ASSERT(obj->uart != (UARTName)NC);
mbed_official 76:aeb1df146756 95
mbed_official 76:aeb1df146756 96 // Enable USART clock
mbed_official 76:aeb1df146756 97 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 98 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 215:83cf97a28428 99 obj->index = 0;
mbed_official 76:aeb1df146756 100 }
mbed_official 76:aeb1df146756 101 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 102 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 215:83cf97a28428 103 obj->index = 1;
mbed_official 76:aeb1df146756 104 }
mbed_official 129:0182c99221bc 105 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 106 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 215:83cf97a28428 107 obj->index = 2;
mbed_official 118:b44c45162f28 108 }
mbed_official 129:0182c99221bc 109 if (obj->uart == UART_4) {
mbed_official 174:8bb9f3a33240 110 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
mbed_official 215:83cf97a28428 111 obj->index = 3;
mbed_official 118:b44c45162f28 112 }
mbed_official 129:0182c99221bc 113 if (obj->uart == UART_5) {
mbed_official 174:8bb9f3a33240 114 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, ENABLE);
mbed_official 215:83cf97a28428 115 obj->index = 4;
mbed_official 118:b44c45162f28 116 }
mbed_official 129:0182c99221bc 117
mbed_official 76:aeb1df146756 118 // Configure the UART pins
mbed_official 76:aeb1df146756 119 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 120 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 76:aeb1df146756 121 pin_mode(tx, PullUp);
mbed_official 76:aeb1df146756 122 pin_mode(rx, PullUp);
mbed_official 76:aeb1df146756 123
mbed_official 76:aeb1df146756 124 // Configure UART
mbed_official 76:aeb1df146756 125 obj->baudrate = 9600;
mbed_official 76:aeb1df146756 126 obj->databits = USART_WordLength_8b;
mbed_official 76:aeb1df146756 127 obj->stopbits = USART_StopBits_1;
mbed_official 174:8bb9f3a33240 128 obj->parity = USART_Parity_No;
mbed_official 76:aeb1df146756 129
mbed_official 215:83cf97a28428 130 obj->pin_tx = tx;
mbed_official 215:83cf97a28428 131 obj->pin_rx = rx;
mbed_official 76:aeb1df146756 132
mbed_official 215:83cf97a28428 133 init_usart(obj);
mbed_official 174:8bb9f3a33240 134
mbed_official 76:aeb1df146756 135 // For stdio management
mbed_official 76:aeb1df146756 136 if (obj->uart == STDIO_UART) {
mbed_official 76:aeb1df146756 137 stdio_uart_inited = 1;
mbed_official 76:aeb1df146756 138 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 174:8bb9f3a33240 139 }
mbed_official 76:aeb1df146756 140 }
mbed_official 76:aeb1df146756 141
mbed_official 76:aeb1df146756 142 void serial_free(serial_t *obj) {
mbed_official 215:83cf97a28428 143 // Reset UART and disable clock
mbed_official 215:83cf97a28428 144 if (obj->uart == UART_1) {
mbed_official 215:83cf97a28428 145 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 215:83cf97a28428 146 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 215:83cf97a28428 147 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 215:83cf97a28428 148 }
mbed_official 215:83cf97a28428 149 if (obj->uart == UART_2) {
mbed_official 215:83cf97a28428 150 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 215:83cf97a28428 151 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 215:83cf97a28428 152 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 215:83cf97a28428 153 }
mbed_official 215:83cf97a28428 154 if (obj->uart == UART_3) {
mbed_official 215:83cf97a28428 155 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 215:83cf97a28428 156 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 215:83cf97a28428 157 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 215:83cf97a28428 158 }
mbed_official 215:83cf97a28428 159 if (obj->uart == UART_4) {
mbed_official 215:83cf97a28428 160 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, ENABLE);
mbed_official 215:83cf97a28428 161 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART4, DISABLE);
mbed_official 215:83cf97a28428 162 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, DISABLE);
mbed_official 215:83cf97a28428 163 }
mbed_official 215:83cf97a28428 164 if (obj->uart == UART_5) {
mbed_official 215:83cf97a28428 165 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, ENABLE);
mbed_official 215:83cf97a28428 166 RCC_APB1PeriphResetCmd(RCC_APB1Periph_UART5, DISABLE);
mbed_official 215:83cf97a28428 167 RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART5, DISABLE);
mbed_official 215:83cf97a28428 168 }
mbed_official 215:83cf97a28428 169
mbed_official 215:83cf97a28428 170 // Configure GPIOs
mbed_official 215:83cf97a28428 171 pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 215:83cf97a28428 172 pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 215:83cf97a28428 173
mbed_official 76:aeb1df146756 174 serial_irq_ids[obj->index] = 0;
mbed_official 76:aeb1df146756 175 }
mbed_official 76:aeb1df146756 176
mbed_official 76:aeb1df146756 177 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 76:aeb1df146756 178 obj->baudrate = baudrate;
mbed_official 76:aeb1df146756 179 init_usart(obj);
mbed_official 76:aeb1df146756 180 }
mbed_official 76:aeb1df146756 181
mbed_official 76:aeb1df146756 182 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 76:aeb1df146756 183 if (data_bits == 8) {
mbed_official 76:aeb1df146756 184 obj->databits = USART_WordLength_8b;
mbed_official 174:8bb9f3a33240 185 } else {
mbed_official 76:aeb1df146756 186 obj->databits = USART_WordLength_9b;
mbed_official 76:aeb1df146756 187 }
mbed_official 76:aeb1df146756 188
mbed_official 76:aeb1df146756 189 switch (parity) {
mbed_official 174:8bb9f3a33240 190 case ParityOdd:
mbed_official 174:8bb9f3a33240 191 case ParityForced0:
mbed_official 174:8bb9f3a33240 192 obj->parity = USART_Parity_Odd;
mbed_official 174:8bb9f3a33240 193 break;
mbed_official 174:8bb9f3a33240 194 case ParityEven:
mbed_official 174:8bb9f3a33240 195 case ParityForced1:
mbed_official 174:8bb9f3a33240 196 obj->parity = USART_Parity_Even;
mbed_official 174:8bb9f3a33240 197 break;
mbed_official 174:8bb9f3a33240 198 default: // ParityNone
mbed_official 174:8bb9f3a33240 199 obj->parity = USART_Parity_No;
mbed_official 174:8bb9f3a33240 200 break;
mbed_official 76:aeb1df146756 201 }
mbed_official 174:8bb9f3a33240 202
mbed_official 76:aeb1df146756 203 if (stop_bits == 2) {
mbed_official 76:aeb1df146756 204 obj->stopbits = USART_StopBits_2;
mbed_official 174:8bb9f3a33240 205 } else {
mbed_official 76:aeb1df146756 206 obj->stopbits = USART_StopBits_1;
mbed_official 76:aeb1df146756 207 }
mbed_official 76:aeb1df146756 208
mbed_official 76:aeb1df146756 209 init_usart(obj);
mbed_official 76:aeb1df146756 210 }
mbed_official 76:aeb1df146756 211
mbed_official 76:aeb1df146756 212 /******************************************************************************
mbed_official 76:aeb1df146756 213 * INTERRUPTS HANDLING
mbed_official 76:aeb1df146756 214 ******************************************************************************/
mbed_official 76:aeb1df146756 215
mbed_official 76:aeb1df146756 216 // not api
mbed_official 76:aeb1df146756 217 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 76:aeb1df146756 218 if (serial_irq_ids[id] != 0) {
mbed_official 76:aeb1df146756 219 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 76:aeb1df146756 220 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 76:aeb1df146756 221 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 76:aeb1df146756 222 }
mbed_official 76:aeb1df146756 223 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 76:aeb1df146756 224 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 76:aeb1df146756 225 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 76:aeb1df146756 226 }
mbed_official 76:aeb1df146756 227 }
mbed_official 76:aeb1df146756 228 }
mbed_official 76:aeb1df146756 229
mbed_official 174:8bb9f3a33240 230 static void uart1_irq(void) {
mbed_official 174:8bb9f3a33240 231 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 174:8bb9f3a33240 232 }
mbed_official 174:8bb9f3a33240 233 static void uart2_irq(void) {
mbed_official 174:8bb9f3a33240 234 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 174:8bb9f3a33240 235 }
mbed_official 174:8bb9f3a33240 236 static void uart3_irq(void) {
mbed_official 174:8bb9f3a33240 237 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 174:8bb9f3a33240 238 }
mbed_official 174:8bb9f3a33240 239 static void uart4_irq(void) {
mbed_official 174:8bb9f3a33240 240 uart_irq((USART_TypeDef*)UART_4, 3);
mbed_official 174:8bb9f3a33240 241 }
mbed_official 174:8bb9f3a33240 242 static void uart5_irq(void) {
mbed_official 174:8bb9f3a33240 243 uart_irq((USART_TypeDef*)UART_5, 4);
mbed_official 174:8bb9f3a33240 244 }
mbed_official 76:aeb1df146756 245
mbed_official 76:aeb1df146756 246 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 76:aeb1df146756 247 irq_handler = handler;
mbed_official 76:aeb1df146756 248 serial_irq_ids[obj->index] = id;
mbed_official 76:aeb1df146756 249 }
mbed_official 76:aeb1df146756 250
mbed_official 76:aeb1df146756 251 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 76:aeb1df146756 252 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 76:aeb1df146756 253 uint32_t vector = 0;
mbed_official 76:aeb1df146756 254 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 255
mbed_official 76:aeb1df146756 256 if (obj->uart == UART_1) {
mbed_official 174:8bb9f3a33240 257 irq_n = USART1_IRQn;
mbed_official 174:8bb9f3a33240 258 vector = (uint32_t)&uart1_irq;
mbed_official 76:aeb1df146756 259 }
mbed_official 174:8bb9f3a33240 260
mbed_official 76:aeb1df146756 261 if (obj->uart == UART_2) {
mbed_official 174:8bb9f3a33240 262 irq_n = USART2_IRQn;
mbed_official 174:8bb9f3a33240 263 vector = (uint32_t)&uart2_irq;
mbed_official 76:aeb1df146756 264 }
mbed_official 129:0182c99221bc 265
mbed_official 118:b44c45162f28 266 if (obj->uart == UART_3) {
mbed_official 174:8bb9f3a33240 267 irq_n = USART3_IRQn;
mbed_official 174:8bb9f3a33240 268 vector = (uint32_t)&uart3_irq;
mbed_official 118:b44c45162f28 269 }
mbed_official 129:0182c99221bc 270
mbed_official 118:b44c45162f28 271 if (obj->uart == UART_4) {
mbed_official 174:8bb9f3a33240 272 irq_n = UART4_IRQn;
mbed_official 174:8bb9f3a33240 273 vector = (uint32_t)&uart4_irq;
mbed_official 118:b44c45162f28 274 }
mbed_official 129:0182c99221bc 275
mbed_official 118:b44c45162f28 276 if (obj->uart == UART_5) {
mbed_official 174:8bb9f3a33240 277 irq_n = UART5_IRQn;
mbed_official 174:8bb9f3a33240 278 vector = (uint32_t)&uart5_irq;
mbed_official 118:b44c45162f28 279 }
mbed_official 174:8bb9f3a33240 280
mbed_official 76:aeb1df146756 281 if (enable) {
mbed_official 174:8bb9f3a33240 282
mbed_official 76:aeb1df146756 283 if (irq == RxIrq) {
mbed_official 76:aeb1df146756 284 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 174:8bb9f3a33240 285 } else { // TxIrq
mbed_official 76:aeb1df146756 286 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 174:8bb9f3a33240 287 }
mbed_official 174:8bb9f3a33240 288
mbed_official 76:aeb1df146756 289 NVIC_SetVector(irq_n, vector);
mbed_official 76:aeb1df146756 290 NVIC_EnableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 291
mbed_official 76:aeb1df146756 292 } else { // disable
mbed_official 174:8bb9f3a33240 293
mbed_official 76:aeb1df146756 294 int all_disabled = 0;
mbed_official 174:8bb9f3a33240 295
mbed_official 76:aeb1df146756 296 if (irq == RxIrq) {
mbed_official 76:aeb1df146756 297 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 76:aeb1df146756 298 // Check if TxIrq is disabled too
mbed_official 76:aeb1df146756 299 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 174:8bb9f3a33240 300 } else { // TxIrq
mbed_official 76:aeb1df146756 301 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 76:aeb1df146756 302 // Check if RxIrq is disabled too
mbed_official 174:8bb9f3a33240 303 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 76:aeb1df146756 304 }
mbed_official 174:8bb9f3a33240 305
mbed_official 76:aeb1df146756 306 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 174:8bb9f3a33240 307
mbed_official 174:8bb9f3a33240 308 }
mbed_official 76:aeb1df146756 309 }
mbed_official 76:aeb1df146756 310
mbed_official 76:aeb1df146756 311 /******************************************************************************
mbed_official 76:aeb1df146756 312 * READ/WRITE
mbed_official 76:aeb1df146756 313 ******************************************************************************/
mbed_official 76:aeb1df146756 314
mbed_official 76:aeb1df146756 315 int serial_getc(serial_t *obj) {
mbed_official 76:aeb1df146756 316 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 317 while (!serial_readable(obj));
mbed_official 76:aeb1df146756 318 return (int)(USART_ReceiveData(usart));
mbed_official 76:aeb1df146756 319 }
mbed_official 76:aeb1df146756 320
mbed_official 76:aeb1df146756 321 void serial_putc(serial_t *obj, int c) {
mbed_official 76:aeb1df146756 322 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 323 while (!serial_writable(obj));
mbed_official 76:aeb1df146756 324 USART_SendData(usart, (uint16_t)c);
mbed_official 76:aeb1df146756 325 }
mbed_official 76:aeb1df146756 326
mbed_official 76:aeb1df146756 327 int serial_readable(serial_t *obj) {
mbed_official 76:aeb1df146756 328 int status;
mbed_official 76:aeb1df146756 329 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 330 // Check if data is received
mbed_official 76:aeb1df146756 331 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 76:aeb1df146756 332 return status;
mbed_official 76:aeb1df146756 333 }
mbed_official 76:aeb1df146756 334
mbed_official 76:aeb1df146756 335 int serial_writable(serial_t *obj) {
mbed_official 76:aeb1df146756 336 int status;
mbed_official 76:aeb1df146756 337 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 338 // Check if data is transmitted
mbed_official 76:aeb1df146756 339 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 76:aeb1df146756 340 return status;
mbed_official 76:aeb1df146756 341 }
mbed_official 76:aeb1df146756 342
mbed_official 76:aeb1df146756 343 void serial_clear(serial_t *obj) {
mbed_official 76:aeb1df146756 344 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 345 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 76:aeb1df146756 346 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 76:aeb1df146756 347 }
mbed_official 76:aeb1df146756 348
mbed_official 76:aeb1df146756 349 void serial_pinout_tx(PinName tx) {
mbed_official 76:aeb1df146756 350 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 76:aeb1df146756 351 }
mbed_official 76:aeb1df146756 352
mbed_official 76:aeb1df146756 353 void serial_break_set(serial_t *obj) {
mbed_official 76:aeb1df146756 354 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 76:aeb1df146756 355 USART_SendBreak(usart);
mbed_official 76:aeb1df146756 356 }
mbed_official 76:aeb1df146756 357
mbed_official 76:aeb1df146756 358 void serial_break_clear(serial_t *obj) {
mbed_official 76:aeb1df146756 359 }
mbed_official 174:8bb9f3a33240 360
mbed_official 174:8bb9f3a33240 361 #endif