shao ziyang / mbed-src-kl05

mbed library sources

Dependents:   frdm_kl05z_gpio_test

Fork of mbed-src by mbed official

targets/hal/TARGET_STM/TARGET_DISCO_F303VC/serial_api.c@323:9e901b0a5aa1, 2014-09-13 (annotated)

Committer:
shaoziyang
Date:
Sat Sep 13 14:25:46 2014 +0000
Revision:
323:9e901b0a5aa1
Parent:
241:ffe41b0c8126 
test with CLOCK_SETUP = 0

Who changed what in which revision?

UserRevisionLine numberNew contents of line
mbed_official 157:90e3acc479a2 1 /* mbed Microcontroller Library
mbed_official 157:90e3acc479a2 2 *******************************************************************************
mbed_official 157:90e3acc479a2 3 * Copyright (c) 2014, STMicroelectronics
mbed_official 157:90e3acc479a2 4 * All rights reserved.
mbed_official 157:90e3acc479a2 5 *
mbed_official 157:90e3acc479a2 6 * Redistribution and use in source and binary forms, with or without
mbed_official 157:90e3acc479a2 7 * modification, are permitted provided that the following conditions are met:
mbed_official 157:90e3acc479a2 8 *
mbed_official 157:90e3acc479a2 9 * 1. Redistributions of source code must retain the above copyright notice,
mbed_official 157:90e3acc479a2 10 * this list of conditions and the following disclaimer.
mbed_official 157:90e3acc479a2 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
mbed_official 157:90e3acc479a2 12 * this list of conditions and the following disclaimer in the documentation
mbed_official 157:90e3acc479a2 13 * and/or other materials provided with the distribution.
mbed_official 157:90e3acc479a2 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
mbed_official 157:90e3acc479a2 15 * may be used to endorse or promote products derived from this software
mbed_official 157:90e3acc479a2 16 * without specific prior written permission.
mbed_official 157:90e3acc479a2 17 *
mbed_official 157:90e3acc479a2 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
mbed_official 157:90e3acc479a2 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
mbed_official 157:90e3acc479a2 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
mbed_official 157:90e3acc479a2 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
mbed_official 157:90e3acc479a2 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
mbed_official 157:90e3acc479a2 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
mbed_official 157:90e3acc479a2 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
mbed_official 157:90e3acc479a2 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
mbed_official 157:90e3acc479a2 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
mbed_official 157:90e3acc479a2 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
mbed_official 157:90e3acc479a2 28 *******************************************************************************
mbed_official 157:90e3acc479a2 29 */
mbed_official 227:7bd0639b8911 30 #include "mbed_assert.h"
mbed_official 157:90e3acc479a2 31 #include "serial_api.h"
mbed_official 241:ffe41b0c8126 32
mbed_official 241:ffe41b0c8126 33 #if DEVICE_SERIAL
mbed_official 241:ffe41b0c8126 34
mbed_official 157:90e3acc479a2 35 #include "cmsis.h"
mbed_official 157:90e3acc479a2 36 #include "pinmap.h"
mbed_official 157:90e3acc479a2 37 #include <string.h>
mbed_official 157:90e3acc479a2 38
mbed_official 157:90e3acc479a2 39 static const PinMap PinMap_UART_TX[] = {
mbed_official 157:90e3acc479a2 40 {PA_2, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 41 {PA_9, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 42 {PA_14, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 43 {PB_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 44 {PB_6, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 45 {PB_9, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 46 {PB_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 47 {PC_4, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 48 {PC_10, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 49 {NC, NC, 0}
mbed_official 157:90e3acc479a2 50 };
mbed_official 157:90e3acc479a2 51
mbed_official 157:90e3acc479a2 52 static const PinMap PinMap_UART_RX[] = {
mbed_official 157:90e3acc479a2 53 {PA_3, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 54 {PA_10, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 55 {PA_15, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 56 {PB_4, UART_2, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 57 {PB_7, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 58 {PB_8, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 59 {PB_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 60 {PC_5, UART_1, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 61 {PC_11, UART_3, STM_PIN_DATA(GPIO_Mode_AF, GPIO_OType_PP, GPIO_PuPd_UP, GPIO_AF_7)},
mbed_official 157:90e3acc479a2 62 {NC, NC, 0}
mbed_official 157:90e3acc479a2 63 };
mbed_official 157:90e3acc479a2 64
mbed_official 157:90e3acc479a2 65 #define UART_NUM (2)
mbed_official 157:90e3acc479a2 66
mbed_official 157:90e3acc479a2 67 static uint32_t serial_irq_ids[UART_NUM] = {0};
mbed_official 157:90e3acc479a2 68
mbed_official 157:90e3acc479a2 69 static uart_irq_handler irq_handler;
mbed_official 157:90e3acc479a2 70
mbed_official 157:90e3acc479a2 71 int stdio_uart_inited = 0;
mbed_official 157:90e3acc479a2 72 serial_t stdio_uart;
mbed_official 157:90e3acc479a2 73
mbed_official 157:90e3acc479a2 74 static void init_usart(serial_t *obj) {
mbed_official 157:90e3acc479a2 75 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 76 USART_InitTypeDef USART_InitStructure;
mbed_official 157:90e3acc479a2 77
mbed_official 157:90e3acc479a2 78 USART_Cmd(usart, DISABLE);
mbed_official 157:90e3acc479a2 79
mbed_official 157:90e3acc479a2 80 USART_InitStructure.USART_BaudRate = obj->baudrate;
mbed_official 157:90e3acc479a2 81 USART_InitStructure.USART_WordLength = obj->databits;
mbed_official 157:90e3acc479a2 82 USART_InitStructure.USART_StopBits = obj->stopbits;
mbed_official 157:90e3acc479a2 83 USART_InitStructure.USART_Parity = obj->parity;
mbed_official 157:90e3acc479a2 84 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
mbed_official 157:90e3acc479a2 85 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
mbed_official 157:90e3acc479a2 86 USART_Init(usart, &USART_InitStructure);
mbed_official 157:90e3acc479a2 87
mbed_official 157:90e3acc479a2 88 USART_Cmd(usart, ENABLE);
mbed_official 157:90e3acc479a2 89 }
mbed_official 157:90e3acc479a2 90
mbed_official 227:7bd0639b8911 91 void serial_init(serial_t *obj, PinName tx, PinName rx) {
mbed_official 157:90e3acc479a2 92 // Determine the UART to use
mbed_official 157:90e3acc479a2 93 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
mbed_official 157:90e3acc479a2 94 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
mbed_official 157:90e3acc479a2 95
mbed_official 157:90e3acc479a2 96 // Get the peripheral name from the pin and assign it to the object
mbed_official 157:90e3acc479a2 97 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
mbed_official 227:7bd0639b8911 98 MBED_ASSERT(obj->uart != (UARTName)NC);
mbed_official 157:90e3acc479a2 99
mbed_official 157:90e3acc479a2 100 // Enable USART clock
mbed_official 157:90e3acc479a2 101 if (obj->uart == UART_1) {
mbed_official 227:7bd0639b8911 102 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 241:ffe41b0c8126 103 obj->index = 0;
mbed_official 157:90e3acc479a2 104 }
mbed_official 157:90e3acc479a2 105 if (obj->uart == UART_2) {
mbed_official 227:7bd0639b8911 106 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 241:ffe41b0c8126 107 obj->index = 1;
mbed_official 157:90e3acc479a2 108 }
mbed_official 157:90e3acc479a2 109 if (obj->uart == UART_3) {
mbed_official 227:7bd0639b8911 110 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 241:ffe41b0c8126 111 obj->index = 2;
mbed_official 157:90e3acc479a2 112 }
mbed_official 157:90e3acc479a2 113
mbed_official 157:90e3acc479a2 114 // Configure the UART pins
mbed_official 157:90e3acc479a2 115 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 157:90e3acc479a2 116 pinmap_pinout(rx, PinMap_UART_RX);
mbed_official 157:90e3acc479a2 117 pin_mode(tx, PullUp);
mbed_official 157:90e3acc479a2 118 pin_mode(rx, PullUp);
mbed_official 157:90e3acc479a2 119
mbed_official 157:90e3acc479a2 120 // Configure UART
mbed_official 157:90e3acc479a2 121 obj->baudrate = 9600;
mbed_official 157:90e3acc479a2 122 obj->databits = USART_WordLength_8b;
mbed_official 157:90e3acc479a2 123 obj->stopbits = USART_StopBits_1;
mbed_official 227:7bd0639b8911 124 obj->parity = USART_Parity_No;
mbed_official 157:90e3acc479a2 125
mbed_official 241:ffe41b0c8126 126 obj->pin_tx = tx;
mbed_official 241:ffe41b0c8126 127 obj->pin_rx = rx;
mbed_official 157:90e3acc479a2 128
mbed_official 241:ffe41b0c8126 129 init_usart(obj);
mbed_official 157:90e3acc479a2 130
mbed_official 157:90e3acc479a2 131 // For stdio management
mbed_official 157:90e3acc479a2 132 if (obj->uart == STDIO_UART) {
mbed_official 157:90e3acc479a2 133 stdio_uart_inited = 1;
mbed_official 157:90e3acc479a2 134 memcpy(&stdio_uart, obj, sizeof(serial_t));
mbed_official 157:90e3acc479a2 135 }
mbed_official 157:90e3acc479a2 136
mbed_official 157:90e3acc479a2 137 }
mbed_official 157:90e3acc479a2 138
mbed_official 157:90e3acc479a2 139 void serial_free(serial_t *obj) {
mbed_official 241:ffe41b0c8126 140 // Reset UART and disable clock
mbed_official 241:ffe41b0c8126 141 if (obj->uart == UART_1) {
mbed_official 241:ffe41b0c8126 142 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, ENABLE);
mbed_official 241:ffe41b0c8126 143 RCC_APB2PeriphResetCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 241:ffe41b0c8126 144 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, DISABLE);
mbed_official 241:ffe41b0c8126 145 }
mbed_official 241:ffe41b0c8126 146 if (obj->uart == UART_2) {
mbed_official 241:ffe41b0c8126 147 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, ENABLE);
mbed_official 241:ffe41b0c8126 148 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 241:ffe41b0c8126 149 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, DISABLE);
mbed_official 241:ffe41b0c8126 150 }
mbed_official 241:ffe41b0c8126 151 if (obj->uart == UART_3) {
mbed_official 241:ffe41b0c8126 152 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, ENABLE);
mbed_official 241:ffe41b0c8126 153 RCC_APB1PeriphResetCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 241:ffe41b0c8126 154 RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, DISABLE);
mbed_official 241:ffe41b0c8126 155 }
mbed_official 241:ffe41b0c8126 156
mbed_official 241:ffe41b0c8126 157 // Configure GPIOs
mbed_official 241:ffe41b0c8126 158 pin_function(obj->pin_tx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 241:ffe41b0c8126 159 pin_function(obj->pin_rx, STM_PIN_DATA(GPIO_Mode_IN, 0, GPIO_PuPd_NOPULL, 0xFF));
mbed_official 241:ffe41b0c8126 160
mbed_official 157:90e3acc479a2 161 serial_irq_ids[obj->index] = 0;
mbed_official 157:90e3acc479a2 162 }
mbed_official 157:90e3acc479a2 163
mbed_official 157:90e3acc479a2 164 void serial_baud(serial_t *obj, int baudrate) {
mbed_official 157:90e3acc479a2 165 obj->baudrate = baudrate;
mbed_official 157:90e3acc479a2 166 init_usart(obj);
mbed_official 157:90e3acc479a2 167 }
mbed_official 157:90e3acc479a2 168
mbed_official 157:90e3acc479a2 169 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits) {
mbed_official 157:90e3acc479a2 170 if (data_bits == 8) {
mbed_official 157:90e3acc479a2 171 obj->databits = USART_WordLength_8b;
mbed_official 157:90e3acc479a2 172 } else {
mbed_official 157:90e3acc479a2 173 obj->databits = USART_WordLength_9b;
mbed_official 157:90e3acc479a2 174 }
mbed_official 157:90e3acc479a2 175
mbed_official 157:90e3acc479a2 176 switch (parity) {
mbed_official 157:90e3acc479a2 177 case ParityOdd:
mbed_official 157:90e3acc479a2 178 case ParityForced0:
mbed_official 157:90e3acc479a2 179 obj->parity = USART_Parity_Odd;
mbed_official 157:90e3acc479a2 180 break;
mbed_official 157:90e3acc479a2 181 case ParityEven:
mbed_official 227:7bd0639b8911 182 case ParityForced1:
mbed_official 157:90e3acc479a2 183 obj->parity = USART_Parity_Even;
mbed_official 157:90e3acc479a2 184 break;
mbed_official 157:90e3acc479a2 185 default: // ParityNone
mbed_official 157:90e3acc479a2 186 obj->parity = USART_Parity_No;
mbed_official 157:90e3acc479a2 187 break;
mbed_official 157:90e3acc479a2 188 }
mbed_official 157:90e3acc479a2 189
mbed_official 157:90e3acc479a2 190 if (stop_bits == 2) {
mbed_official 157:90e3acc479a2 191 obj->stopbits = USART_StopBits_2;
mbed_official 157:90e3acc479a2 192 } else {
mbed_official 157:90e3acc479a2 193 obj->stopbits = USART_StopBits_1;
mbed_official 157:90e3acc479a2 194 }
mbed_official 157:90e3acc479a2 195
mbed_official 157:90e3acc479a2 196 init_usart(obj);
mbed_official 157:90e3acc479a2 197 }
mbed_official 157:90e3acc479a2 198
mbed_official 157:90e3acc479a2 199 /******************************************************************************
mbed_official 157:90e3acc479a2 200 * INTERRUPTS HANDLING
mbed_official 157:90e3acc479a2 201 ******************************************************************************/
mbed_official 157:90e3acc479a2 202
mbed_official 157:90e3acc479a2 203 // not api
mbed_official 157:90e3acc479a2 204 static void uart_irq(USART_TypeDef* usart, int id) {
mbed_official 157:90e3acc479a2 205 if (serial_irq_ids[id] != 0) {
mbed_official 157:90e3acc479a2 206 if (USART_GetITStatus(usart, USART_IT_TC) != RESET) {
mbed_official 157:90e3acc479a2 207 irq_handler(serial_irq_ids[id], TxIrq);
mbed_official 157:90e3acc479a2 208 USART_ClearITPendingBit(usart, USART_IT_TC);
mbed_official 157:90e3acc479a2 209 }
mbed_official 157:90e3acc479a2 210 if (USART_GetITStatus(usart, USART_IT_RXNE) != RESET) {
mbed_official 157:90e3acc479a2 211 irq_handler(serial_irq_ids[id], RxIrq);
mbed_official 157:90e3acc479a2 212 USART_ClearITPendingBit(usart, USART_IT_RXNE);
mbed_official 157:90e3acc479a2 213 }
mbed_official 157:90e3acc479a2 214 }
mbed_official 157:90e3acc479a2 215 }
mbed_official 157:90e3acc479a2 216
mbed_official 157:90e3acc479a2 217 static void uart1_irq(void) {
mbed_official 157:90e3acc479a2 218 uart_irq((USART_TypeDef*)UART_1, 0);
mbed_official 157:90e3acc479a2 219 }
mbed_official 157:90e3acc479a2 220 static void uart2_irq(void) {
mbed_official 157:90e3acc479a2 221 uart_irq((USART_TypeDef*)UART_2, 1);
mbed_official 157:90e3acc479a2 222 }
mbed_official 157:90e3acc479a2 223 static void uart3_irq(void) {
mbed_official 157:90e3acc479a2 224 uart_irq((USART_TypeDef*)UART_3, 2);
mbed_official 157:90e3acc479a2 225 }
mbed_official 157:90e3acc479a2 226
mbed_official 157:90e3acc479a2 227 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id) {
mbed_official 157:90e3acc479a2 228 irq_handler = handler;
mbed_official 157:90e3acc479a2 229 serial_irq_ids[obj->index] = id;
mbed_official 157:90e3acc479a2 230 }
mbed_official 157:90e3acc479a2 231
mbed_official 157:90e3acc479a2 232 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable) {
mbed_official 157:90e3acc479a2 233 IRQn_Type irq_n = (IRQn_Type)0;
mbed_official 157:90e3acc479a2 234 uint32_t vector = 0;
mbed_official 157:90e3acc479a2 235 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 236
mbed_official 157:90e3acc479a2 237 if (obj->uart == UART_1) {
mbed_official 157:90e3acc479a2 238 irq_n = USART1_IRQn;
mbed_official 157:90e3acc479a2 239 vector = (uint32_t)&uart1_irq;
mbed_official 157:90e3acc479a2 240 }
mbed_official 157:90e3acc479a2 241
mbed_official 157:90e3acc479a2 242 if (obj->uart == UART_2) {
mbed_official 157:90e3acc479a2 243 irq_n = USART2_IRQn;
mbed_official 157:90e3acc479a2 244 vector = (uint32_t)&uart2_irq;
mbed_official 157:90e3acc479a2 245 }
mbed_official 157:90e3acc479a2 246
mbed_official 157:90e3acc479a2 247 if (obj->uart == UART_3) {
mbed_official 157:90e3acc479a2 248 irq_n = USART3_IRQn;
mbed_official 157:90e3acc479a2 249 vector = (uint32_t)&uart3_irq;
mbed_official 157:90e3acc479a2 250 }
mbed_official 157:90e3acc479a2 251
mbed_official 157:90e3acc479a2 252 if (enable) {
mbed_official 157:90e3acc479a2 253
mbed_official 157:90e3acc479a2 254 if (irq == RxIrq) {
mbed_official 157:90e3acc479a2 255 USART_ITConfig(usart, USART_IT_RXNE, ENABLE);
mbed_official 157:90e3acc479a2 256 } else { // TxIrq
mbed_official 157:90e3acc479a2 257 USART_ITConfig(usart, USART_IT_TC, ENABLE);
mbed_official 227:7bd0639b8911 258 }
mbed_official 157:90e3acc479a2 259
mbed_official 157:90e3acc479a2 260 NVIC_SetVector(irq_n, vector);
mbed_official 157:90e3acc479a2 261 NVIC_EnableIRQ(irq_n);
mbed_official 157:90e3acc479a2 262
mbed_official 157:90e3acc479a2 263 } else { // disable
mbed_official 157:90e3acc479a2 264
mbed_official 157:90e3acc479a2 265 int all_disabled = 0;
mbed_official 157:90e3acc479a2 266
mbed_official 157:90e3acc479a2 267 if (irq == RxIrq) {
mbed_official 157:90e3acc479a2 268 USART_ITConfig(usart, USART_IT_RXNE, DISABLE);
mbed_official 157:90e3acc479a2 269 // Check if TxIrq is disabled too
mbed_official 157:90e3acc479a2 270 if ((usart->CR1 & USART_CR1_TXEIE) == 0) all_disabled = 1;
mbed_official 157:90e3acc479a2 271 } else { // TxIrq
mbed_official 157:90e3acc479a2 272 USART_ITConfig(usart, USART_IT_TXE, DISABLE);
mbed_official 157:90e3acc479a2 273 // Check if RxIrq is disabled too
mbed_official 227:7bd0639b8911 274 if ((usart->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
mbed_official 157:90e3acc479a2 275 }
mbed_official 157:90e3acc479a2 276
mbed_official 157:90e3acc479a2 277 if (all_disabled) NVIC_DisableIRQ(irq_n);
mbed_official 157:90e3acc479a2 278
mbed_official 227:7bd0639b8911 279 }
mbed_official 157:90e3acc479a2 280 }
mbed_official 157:90e3acc479a2 281
mbed_official 157:90e3acc479a2 282 /******************************************************************************
mbed_official 157:90e3acc479a2 283 * READ/WRITE
mbed_official 157:90e3acc479a2 284 ******************************************************************************/
mbed_official 157:90e3acc479a2 285
mbed_official 157:90e3acc479a2 286 int serial_getc(serial_t *obj) {
mbed_official 157:90e3acc479a2 287 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 288 while (!serial_readable(obj));
mbed_official 157:90e3acc479a2 289 return (int)(USART_ReceiveData(usart));
mbed_official 157:90e3acc479a2 290 }
mbed_official 157:90e3acc479a2 291
mbed_official 157:90e3acc479a2 292 void serial_putc(serial_t *obj, int c) {
mbed_official 157:90e3acc479a2 293 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 294 while (!serial_writable(obj));
mbed_official 157:90e3acc479a2 295 USART_SendData(usart, (uint16_t)c);
mbed_official 157:90e3acc479a2 296 }
mbed_official 157:90e3acc479a2 297
mbed_official 157:90e3acc479a2 298 int serial_readable(serial_t *obj) {
mbed_official 157:90e3acc479a2 299 int status;
mbed_official 157:90e3acc479a2 300 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 301 // Check if data is received
mbed_official 157:90e3acc479a2 302 status = ((USART_GetFlagStatus(usart, USART_FLAG_RXNE) != RESET) ? 1 : 0);
mbed_official 157:90e3acc479a2 303 return status;
mbed_official 157:90e3acc479a2 304 }
mbed_official 157:90e3acc479a2 305
mbed_official 157:90e3acc479a2 306 int serial_writable(serial_t *obj) {
mbed_official 157:90e3acc479a2 307 int status;
mbed_official 157:90e3acc479a2 308 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 309 // Check if data is transmitted
mbed_official 157:90e3acc479a2 310 status = ((USART_GetFlagStatus(usart, USART_FLAG_TXE) != RESET) ? 1 : 0);
mbed_official 157:90e3acc479a2 311 return status;
mbed_official 157:90e3acc479a2 312 }
mbed_official 157:90e3acc479a2 313
mbed_official 157:90e3acc479a2 314 void serial_clear(serial_t *obj) {
mbed_official 157:90e3acc479a2 315 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 316 USART_ClearFlag(usart, USART_FLAG_TXE);
mbed_official 157:90e3acc479a2 317 USART_ClearFlag(usart, USART_FLAG_RXNE);
mbed_official 157:90e3acc479a2 318 }
mbed_official 157:90e3acc479a2 319
mbed_official 157:90e3acc479a2 320 void serial_pinout_tx(PinName tx) {
mbed_official 157:90e3acc479a2 321 pinmap_pinout(tx, PinMap_UART_TX);
mbed_official 157:90e3acc479a2 322 }
mbed_official 157:90e3acc479a2 323
mbed_official 157:90e3acc479a2 324 void serial_break_set(serial_t *obj) {
mbed_official 157:90e3acc479a2 325 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 326 USART_RequestCmd(usart, USART_Request_SBKRQ, ENABLE);
mbed_official 157:90e3acc479a2 327 }
mbed_official 157:90e3acc479a2 328
mbed_official 157:90e3acc479a2 329 void serial_break_clear(serial_t *obj) {
mbed_official 157:90e3acc479a2 330 USART_TypeDef *usart = (USART_TypeDef *)(obj->uart);
mbed_official 157:90e3acc479a2 331 USART_RequestCmd(usart, USART_Request_SBKRQ, DISABLE);
mbed_official 157:90e3acc479a2 332 USART_ClearFlag(usart, USART_FLAG_SBK);
mbed_official 157:90e3acc479a2 333 }
mbed_official 241:ffe41b0c8126 334
mbed_official 241:ffe41b0c8126 335 #endif