teralytic / mbed-dev

mbed library sources. Supersedes mbed-src.

Fork of mbed by teralytic

targets/hal/TARGET_STM/TARGET_STM32L0/serial_api.c@114:fe4fe5cfc3a3, 2016-04-26 (annotated)

Committer:
mbed_official
Date:
Tue Apr 26 17:15:11 2016 +0100
Revision:
114:fe4fe5cfc3a3
Parent:
0:9b334a45a8ff
Child:
144:ef7eb2e8f9f7
Synchronized with git revision d25daf7fad8fea9180bfa5134105bc6439ed808a



Full URL: https://github.com/mbedmicro/mbed/commit/d25daf7fad8fea9180bfa5134105bc6439ed808a/



[NUCLEO_L031K6] Add target

Who changed what in which revision?

UserRevisionLine numberNew contents of line
bogdanm 0:9b334a45a8ff 1 /* mbed Microcontroller Library
bogdanm 0:9b334a45a8ff 2 *******************************************************************************
bogdanm 0:9b334a45a8ff 3 * Copyright (c) 2015, STMicroelectronics
bogdanm 0:9b334a45a8ff 4 * All rights reserved.
bogdanm 0:9b334a45a8ff 5 *
bogdanm 0:9b334a45a8ff 6 * Redistribution and use in source and binary forms, with or without
bogdanm 0:9b334a45a8ff 7 * modification, are permitted provided that the following conditions are met:
bogdanm 0:9b334a45a8ff 8 *
bogdanm 0:9b334a45a8ff 9 * 1. Redistributions of source code must retain the above copyright notice,
bogdanm 0:9b334a45a8ff 10 * this list of conditions and the following disclaimer.
bogdanm 0:9b334a45a8ff 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
bogdanm 0:9b334a45a8ff 12 * this list of conditions and the following disclaimer in the documentation
bogdanm 0:9b334a45a8ff 13 * and/or other materials provided with the distribution.
bogdanm 0:9b334a45a8ff 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
bogdanm 0:9b334a45a8ff 15 * may be used to endorse or promote products derived from this software
bogdanm 0:9b334a45a8ff 16 * without specific prior written permission.
bogdanm 0:9b334a45a8ff 17 *
bogdanm 0:9b334a45a8ff 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
bogdanm 0:9b334a45a8ff 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
bogdanm 0:9b334a45a8ff 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
bogdanm 0:9b334a45a8ff 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
bogdanm 0:9b334a45a8ff 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
bogdanm 0:9b334a45a8ff 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
bogdanm 0:9b334a45a8ff 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
bogdanm 0:9b334a45a8ff 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
bogdanm 0:9b334a45a8ff 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
bogdanm 0:9b334a45a8ff 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
bogdanm 0:9b334a45a8ff 28 *******************************************************************************
bogdanm 0:9b334a45a8ff 29 */
bogdanm 0:9b334a45a8ff 30 #include "mbed_assert.h"
bogdanm 0:9b334a45a8ff 31 #include "serial_api.h"
bogdanm 0:9b334a45a8ff 32
bogdanm 0:9b334a45a8ff 33 #if DEVICE_SERIAL
bogdanm 0:9b334a45a8ff 34
bogdanm 0:9b334a45a8ff 35 #include "cmsis.h"
bogdanm 0:9b334a45a8ff 36 #include "pinmap.h"
bogdanm 0:9b334a45a8ff 37 #include "mbed_error.h"
bogdanm 0:9b334a45a8ff 38 #include <string.h>
bogdanm 0:9b334a45a8ff 39 #include "PeripheralPins.h"
bogdanm 0:9b334a45a8ff 40
bogdanm 0:9b334a45a8ff 41 #define UART_NUM (5)
bogdanm 0:9b334a45a8ff 42
bogdanm 0:9b334a45a8ff 43 static uint32_t serial_irq_ids[UART_NUM] = {0, 0, 0, 0, 0};
bogdanm 0:9b334a45a8ff 44
bogdanm 0:9b334a45a8ff 45 static uart_irq_handler irq_handler;
bogdanm 0:9b334a45a8ff 46
bogdanm 0:9b334a45a8ff 47 UART_HandleTypeDef UartHandle;
bogdanm 0:9b334a45a8ff 48
bogdanm 0:9b334a45a8ff 49 int stdio_uart_inited = 0;
bogdanm 0:9b334a45a8ff 50 serial_t stdio_uart;
bogdanm 0:9b334a45a8ff 51
bogdanm 0:9b334a45a8ff 52 static void init_uart(serial_t *obj)
bogdanm 0:9b334a45a8ff 53 {
bogdanm 0:9b334a45a8ff 54 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 55
bogdanm 0:9b334a45a8ff 56 if (obj->uart == LPUART_1) {
bogdanm 0:9b334a45a8ff 57 UartHandle.Init.BaudRate = obj->baudrate >> 1;
bogdanm 0:9b334a45a8ff 58 } else {
bogdanm 0:9b334a45a8ff 59 UartHandle.Init.BaudRate = obj->baudrate;
bogdanm 0:9b334a45a8ff 60 }
bogdanm 0:9b334a45a8ff 61 UartHandle.Init.WordLength = obj->databits;
bogdanm 0:9b334a45a8ff 62 UartHandle.Init.StopBits = obj->stopbits;
bogdanm 0:9b334a45a8ff 63 UartHandle.Init.Parity = obj->parity;
bogdanm 0:9b334a45a8ff 64 UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
bogdanm 0:9b334a45a8ff 65
bogdanm 0:9b334a45a8ff 66 if (obj->pin_rx == NC) {
bogdanm 0:9b334a45a8ff 67 UartHandle.Init.Mode = UART_MODE_TX;
bogdanm 0:9b334a45a8ff 68 } else if (obj->pin_tx == NC) {
bogdanm 0:9b334a45a8ff 69 UartHandle.Init.Mode = UART_MODE_RX;
bogdanm 0:9b334a45a8ff 70 } else {
bogdanm 0:9b334a45a8ff 71 UartHandle.Init.Mode = UART_MODE_TX_RX;
bogdanm 0:9b334a45a8ff 72 }
bogdanm 0:9b334a45a8ff 73
bogdanm 0:9b334a45a8ff 74 // Disable the reception overrun detection
bogdanm 0:9b334a45a8ff 75 UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_RXOVERRUNDISABLE_INIT;
bogdanm 0:9b334a45a8ff 76 UartHandle.AdvancedInit.OverrunDisable = UART_ADVFEATURE_OVERRUN_DISABLE;
bogdanm 0:9b334a45a8ff 77
bogdanm 0:9b334a45a8ff 78 if (HAL_UART_Init(&UartHandle) != HAL_OK) {
bogdanm 0:9b334a45a8ff 79 error("Cannot initialize UART");
bogdanm 0:9b334a45a8ff 80 }
bogdanm 0:9b334a45a8ff 81 }
bogdanm 0:9b334a45a8ff 82
bogdanm 0:9b334a45a8ff 83 void serial_init(serial_t *obj, PinName tx, PinName rx)
bogdanm 0:9b334a45a8ff 84 {
bogdanm 0:9b334a45a8ff 85 // Determine the UART to use (UART_1, UART_2, ...)
bogdanm 0:9b334a45a8ff 86 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 87 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
bogdanm 0:9b334a45a8ff 88
bogdanm 0:9b334a45a8ff 89 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
bogdanm 0:9b334a45a8ff 90 obj->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
bogdanm 0:9b334a45a8ff 91 MBED_ASSERT(obj->uart != (UARTName)NC);
bogdanm 0:9b334a45a8ff 92
bogdanm 0:9b334a45a8ff 93 // Enable UART clock
mbed_official 114:fe4fe5cfc3a3 94 #if defined(USART1_BASE)
bogdanm 0:9b334a45a8ff 95 if (obj->uart == UART_1) {
bogdanm 0:9b334a45a8ff 96 __HAL_RCC_USART1_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 97 obj->index = 0;
bogdanm 0:9b334a45a8ff 98 }
mbed_official 114:fe4fe5cfc3a3 99 #endif
bogdanm 0:9b334a45a8ff 100
bogdanm 0:9b334a45a8ff 101 if (obj->uart == UART_2) {
bogdanm 0:9b334a45a8ff 102 __HAL_RCC_USART2_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 103 obj->index = 1;
bogdanm 0:9b334a45a8ff 104 }
bogdanm 0:9b334a45a8ff 105
bogdanm 0:9b334a45a8ff 106 if (obj->uart == LPUART_1) {
bogdanm 0:9b334a45a8ff 107 __HAL_RCC_LPUART1_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 108 obj->index = 2;
bogdanm 0:9b334a45a8ff 109 }
bogdanm 0:9b334a45a8ff 110
bogdanm 0:9b334a45a8ff 111 #if defined(USART4_BASE)
bogdanm 0:9b334a45a8ff 112 if (obj->uart == UART_4) {
bogdanm 0:9b334a45a8ff 113 __HAL_RCC_USART4_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 114 obj->index = 3;
bogdanm 0:9b334a45a8ff 115 }
bogdanm 0:9b334a45a8ff 116 #endif
bogdanm 0:9b334a45a8ff 117
bogdanm 0:9b334a45a8ff 118 #if defined(USART5_BASE)
bogdanm 0:9b334a45a8ff 119 if (obj->uart == UART_5) {
bogdanm 0:9b334a45a8ff 120 __HAL_RCC_USART5_CLK_ENABLE();
bogdanm 0:9b334a45a8ff 121 obj->index = 4;
bogdanm 0:9b334a45a8ff 122 }
bogdanm 0:9b334a45a8ff 123 #endif
bogdanm 0:9b334a45a8ff 124
bogdanm 0:9b334a45a8ff 125 // Configure the UART pins
bogdanm 0:9b334a45a8ff 126 pinmap_pinout(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 127 pinmap_pinout(rx, PinMap_UART_RX);
bogdanm 0:9b334a45a8ff 128 if (tx != NC) {
bogdanm 0:9b334a45a8ff 129 pin_mode(tx, PullUp);
bogdanm 0:9b334a45a8ff 130 }
bogdanm 0:9b334a45a8ff 131 if (rx != NC) {
bogdanm 0:9b334a45a8ff 132 pin_mode(rx, PullUp);
bogdanm 0:9b334a45a8ff 133 }
bogdanm 0:9b334a45a8ff 134
bogdanm 0:9b334a45a8ff 135 // Configure UART
bogdanm 0:9b334a45a8ff 136 obj->baudrate = 9600;
bogdanm 0:9b334a45a8ff 137 obj->databits = UART_WORDLENGTH_8B;
bogdanm 0:9b334a45a8ff 138 obj->stopbits = UART_STOPBITS_1;
bogdanm 0:9b334a45a8ff 139 obj->parity = UART_PARITY_NONE;
bogdanm 0:9b334a45a8ff 140 obj->pin_tx = tx;
bogdanm 0:9b334a45a8ff 141 obj->pin_rx = rx;
bogdanm 0:9b334a45a8ff 142
bogdanm 0:9b334a45a8ff 143 init_uart(obj);
bogdanm 0:9b334a45a8ff 144
bogdanm 0:9b334a45a8ff 145 // For stdio management
bogdanm 0:9b334a45a8ff 146 if (obj->uart == STDIO_UART) {
bogdanm 0:9b334a45a8ff 147 stdio_uart_inited = 1;
bogdanm 0:9b334a45a8ff 148 memcpy(&stdio_uart, obj, sizeof(serial_t));
bogdanm 0:9b334a45a8ff 149 }
bogdanm 0:9b334a45a8ff 150 }
bogdanm 0:9b334a45a8ff 151
bogdanm 0:9b334a45a8ff 152 void serial_free(serial_t *obj)
bogdanm 0:9b334a45a8ff 153 {
bogdanm 0:9b334a45a8ff 154 // Reset UART and disable clock
mbed_official 114:fe4fe5cfc3a3 155 #if defined(USART1_BASE)
bogdanm 0:9b334a45a8ff 156 if (obj->uart == UART_1) {
bogdanm 0:9b334a45a8ff 157 __HAL_RCC_USART1_FORCE_RESET();
bogdanm 0:9b334a45a8ff 158 __HAL_RCC_USART1_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 159 __HAL_RCC_USART1_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 160 }
mbed_official 114:fe4fe5cfc3a3 161 #endif
bogdanm 0:9b334a45a8ff 162
bogdanm 0:9b334a45a8ff 163 if (obj->uart == UART_2) {
bogdanm 0:9b334a45a8ff 164 __HAL_RCC_USART2_FORCE_RESET();
bogdanm 0:9b334a45a8ff 165 __HAL_RCC_USART2_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 166 __HAL_RCC_USART2_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 167 }
bogdanm 0:9b334a45a8ff 168
bogdanm 0:9b334a45a8ff 169 if (obj->uart == LPUART_1) {
bogdanm 0:9b334a45a8ff 170 __HAL_RCC_LPUART1_FORCE_RESET();
bogdanm 0:9b334a45a8ff 171 __HAL_RCC_LPUART1_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 172 __HAL_RCC_LPUART1_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 173 }
bogdanm 0:9b334a45a8ff 174
bogdanm 0:9b334a45a8ff 175 #if defined(USART4_BASE)
bogdanm 0:9b334a45a8ff 176 if (obj->uart == UART_4) {
bogdanm 0:9b334a45a8ff 177 __HAL_RCC_USART4_FORCE_RESET();
bogdanm 0:9b334a45a8ff 178 __HAL_RCC_USART4_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 179 __HAL_RCC_USART4_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 180 }
bogdanm 0:9b334a45a8ff 181 #endif
bogdanm 0:9b334a45a8ff 182
bogdanm 0:9b334a45a8ff 183 #if defined(USART5_BASE)
bogdanm 0:9b334a45a8ff 184 if (obj->uart == UART_5) {
bogdanm 0:9b334a45a8ff 185 __HAL_RCC_USART5_FORCE_RESET();
bogdanm 0:9b334a45a8ff 186 __HAL_RCC_USART5_RELEASE_RESET();
bogdanm 0:9b334a45a8ff 187 __HAL_RCC_USART5_CLK_DISABLE();
bogdanm 0:9b334a45a8ff 188 }
bogdanm 0:9b334a45a8ff 189 #endif
bogdanm 0:9b334a45a8ff 190
bogdanm 0:9b334a45a8ff 191 // Configure GPIOs
bogdanm 0:9b334a45a8ff 192 pin_function(obj->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 193 pin_function(obj->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
bogdanm 0:9b334a45a8ff 194
bogdanm 0:9b334a45a8ff 195 serial_irq_ids[obj->index] = 0;
bogdanm 0:9b334a45a8ff 196 }
bogdanm 0:9b334a45a8ff 197
bogdanm 0:9b334a45a8ff 198 void serial_baud(serial_t *obj, int baudrate)
bogdanm 0:9b334a45a8ff 199 {
bogdanm 0:9b334a45a8ff 200 obj->baudrate = baudrate;
bogdanm 0:9b334a45a8ff 201 init_uart(obj);
bogdanm 0:9b334a45a8ff 202 }
bogdanm 0:9b334a45a8ff 203
bogdanm 0:9b334a45a8ff 204 void serial_format(serial_t *obj, int data_bits, SerialParity parity, int stop_bits)
bogdanm 0:9b334a45a8ff 205 {
bogdanm 0:9b334a45a8ff 206 if (data_bits == 9) {
bogdanm 0:9b334a45a8ff 207 obj->databits = UART_WORDLENGTH_9B;
bogdanm 0:9b334a45a8ff 208 } else {
bogdanm 0:9b334a45a8ff 209 obj->databits = UART_WORDLENGTH_8B;
bogdanm 0:9b334a45a8ff 210 }
bogdanm 0:9b334a45a8ff 211
bogdanm 0:9b334a45a8ff 212 switch (parity) {
bogdanm 0:9b334a45a8ff 213 case ParityOdd:
bogdanm 0:9b334a45a8ff 214 case ParityForced0:
bogdanm 0:9b334a45a8ff 215 obj->parity = UART_PARITY_ODD;
bogdanm 0:9b334a45a8ff 216 break;
bogdanm 0:9b334a45a8ff 217 case ParityEven:
bogdanm 0:9b334a45a8ff 218 case ParityForced1:
bogdanm 0:9b334a45a8ff 219 obj->parity = UART_PARITY_EVEN;
bogdanm 0:9b334a45a8ff 220 break;
bogdanm 0:9b334a45a8ff 221 default: // ParityNone
bogdanm 0:9b334a45a8ff 222 obj->parity = UART_PARITY_NONE;
bogdanm 0:9b334a45a8ff 223 break;
bogdanm 0:9b334a45a8ff 224 }
bogdanm 0:9b334a45a8ff 225
bogdanm 0:9b334a45a8ff 226 if (stop_bits == 2) {
bogdanm 0:9b334a45a8ff 227 obj->stopbits = UART_STOPBITS_2;
bogdanm 0:9b334a45a8ff 228 } else {
bogdanm 0:9b334a45a8ff 229 obj->stopbits = UART_STOPBITS_1;
bogdanm 0:9b334a45a8ff 230 }
bogdanm 0:9b334a45a8ff 231
bogdanm 0:9b334a45a8ff 232 init_uart(obj);
bogdanm 0:9b334a45a8ff 233 }
bogdanm 0:9b334a45a8ff 234
bogdanm 0:9b334a45a8ff 235 /******************************************************************************
bogdanm 0:9b334a45a8ff 236 * INTERRUPTS HANDLING
bogdanm 0:9b334a45a8ff 237 ******************************************************************************/
bogdanm 0:9b334a45a8ff 238
bogdanm 0:9b334a45a8ff 239 static void uart_irq(UARTName name, int id)
bogdanm 0:9b334a45a8ff 240 {
bogdanm 0:9b334a45a8ff 241 UartHandle.Instance = (USART_TypeDef *)name;
bogdanm 0:9b334a45a8ff 242 if (serial_irq_ids[id] != 0) {
bogdanm 0:9b334a45a8ff 243 if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TC) != RESET) {
bogdanm 0:9b334a45a8ff 244 irq_handler(serial_irq_ids[id], TxIrq);
bogdanm 0:9b334a45a8ff 245 __HAL_UART_CLEAR_IT(&UartHandle, UART_CLEAR_TCF);
bogdanm 0:9b334a45a8ff 246 }
bogdanm 0:9b334a45a8ff 247 if (__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) {
bogdanm 0:9b334a45a8ff 248 irq_handler(serial_irq_ids[id], RxIrq);
bogdanm 0:9b334a45a8ff 249 volatile uint32_t tmpval = UartHandle.Instance->RDR; // Clear RXNE bit
bogdanm 0:9b334a45a8ff 250 }
bogdanm 0:9b334a45a8ff 251 }
bogdanm 0:9b334a45a8ff 252 }
bogdanm 0:9b334a45a8ff 253
mbed_official 114:fe4fe5cfc3a3 254 #if defined(USART1_BASE)
bogdanm 0:9b334a45a8ff 255 static void uart1_irq(void)
bogdanm 0:9b334a45a8ff 256 {
bogdanm 0:9b334a45a8ff 257 uart_irq(UART_1, 0);
bogdanm 0:9b334a45a8ff 258 }
mbed_official 114:fe4fe5cfc3a3 259 #endif
bogdanm 0:9b334a45a8ff 260
bogdanm 0:9b334a45a8ff 261 static void uart2_irq(void)
bogdanm 0:9b334a45a8ff 262 {
bogdanm 0:9b334a45a8ff 263 uart_irq(UART_2, 1);
bogdanm 0:9b334a45a8ff 264 }
bogdanm 0:9b334a45a8ff 265
bogdanm 0:9b334a45a8ff 266 static void lpuart1_irq(void)
bogdanm 0:9b334a45a8ff 267 {
bogdanm 0:9b334a45a8ff 268 uart_irq(LPUART_1, 2);
bogdanm 0:9b334a45a8ff 269 }
bogdanm 0:9b334a45a8ff 270
bogdanm 0:9b334a45a8ff 271 #if defined(USART4_BASE)
bogdanm 0:9b334a45a8ff 272 static void uart4_irq(void)
bogdanm 0:9b334a45a8ff 273 {
bogdanm 0:9b334a45a8ff 274 uart_irq(UART_4, 3);
bogdanm 0:9b334a45a8ff 275 }
bogdanm 0:9b334a45a8ff 276 #endif
bogdanm 0:9b334a45a8ff 277
bogdanm 0:9b334a45a8ff 278 #if defined(USART5_BASE)
bogdanm 0:9b334a45a8ff 279 static void uart5_irq(void)
bogdanm 0:9b334a45a8ff 280 {
bogdanm 0:9b334a45a8ff 281 uart_irq(UART_5, 4);
bogdanm 0:9b334a45a8ff 282 }
bogdanm 0:9b334a45a8ff 283 #endif
bogdanm 0:9b334a45a8ff 284
bogdanm 0:9b334a45a8ff 285 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
bogdanm 0:9b334a45a8ff 286 {
bogdanm 0:9b334a45a8ff 287 irq_handler = handler;
bogdanm 0:9b334a45a8ff 288 serial_irq_ids[obj->index] = id;
bogdanm 0:9b334a45a8ff 289 }
bogdanm 0:9b334a45a8ff 290
bogdanm 0:9b334a45a8ff 291 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
bogdanm 0:9b334a45a8ff 292 {
bogdanm 0:9b334a45a8ff 293 IRQn_Type irq_n = (IRQn_Type)0;
bogdanm 0:9b334a45a8ff 294 uint32_t vector = 0;
bogdanm 0:9b334a45a8ff 295
bogdanm 0:9b334a45a8ff 296 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 297
mbed_official 114:fe4fe5cfc3a3 298 #if defined(USART1_BASE)
bogdanm 0:9b334a45a8ff 299 if (obj->uart == UART_1) {
bogdanm 0:9b334a45a8ff 300 irq_n = USART1_IRQn;
bogdanm 0:9b334a45a8ff 301 vector = (uint32_t)&uart1_irq;
bogdanm 0:9b334a45a8ff 302 }
mbed_official 114:fe4fe5cfc3a3 303 #endif
bogdanm 0:9b334a45a8ff 304
bogdanm 0:9b334a45a8ff 305 if (obj->uart == UART_2) {
bogdanm 0:9b334a45a8ff 306 irq_n = USART2_IRQn;
bogdanm 0:9b334a45a8ff 307 vector = (uint32_t)&uart2_irq;
bogdanm 0:9b334a45a8ff 308 }
bogdanm 0:9b334a45a8ff 309
bogdanm 0:9b334a45a8ff 310 if (obj->uart == LPUART_1) {
bogdanm 0:9b334a45a8ff 311 irq_n = RNG_LPUART1_IRQn;
bogdanm 0:9b334a45a8ff 312 vector = (uint32_t)&lpuart1_irq;
bogdanm 0:9b334a45a8ff 313 }
bogdanm 0:9b334a45a8ff 314
bogdanm 0:9b334a45a8ff 315 #if defined(USART4_BASE)
bogdanm 0:9b334a45a8ff 316 if (obj->uart == UART_4) {
bogdanm 0:9b334a45a8ff 317 irq_n = USART4_5_IRQn;
bogdanm 0:9b334a45a8ff 318 vector = (uint32_t)&uart4_irq;
bogdanm 0:9b334a45a8ff 319 }
bogdanm 0:9b334a45a8ff 320 #endif
bogdanm 0:9b334a45a8ff 321
bogdanm 0:9b334a45a8ff 322 #if defined(USART5_BASE)
bogdanm 0:9b334a45a8ff 323 if (obj->uart == UART_5) {
bogdanm 0:9b334a45a8ff 324 irq_n = USART4_5_IRQn;
bogdanm 0:9b334a45a8ff 325 vector = (uint32_t)&uart5_irq;
bogdanm 0:9b334a45a8ff 326 }
bogdanm 0:9b334a45a8ff 327 #endif
bogdanm 0:9b334a45a8ff 328
bogdanm 0:9b334a45a8ff 329 if (enable) {
bogdanm 0:9b334a45a8ff 330
bogdanm 0:9b334a45a8ff 331 if (irq == RxIrq) {
bogdanm 0:9b334a45a8ff 332 __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_RXNE);
bogdanm 0:9b334a45a8ff 333 } else { // TxIrq
bogdanm 0:9b334a45a8ff 334 __HAL_UART_ENABLE_IT(&UartHandle, UART_IT_TC);
bogdanm 0:9b334a45a8ff 335 }
bogdanm 0:9b334a45a8ff 336
bogdanm 0:9b334a45a8ff 337 NVIC_SetVector(irq_n, vector);
bogdanm 0:9b334a45a8ff 338 NVIC_EnableIRQ(irq_n);
bogdanm 0:9b334a45a8ff 339
bogdanm 0:9b334a45a8ff 340 } else { // disable
bogdanm 0:9b334a45a8ff 341
bogdanm 0:9b334a45a8ff 342 int all_disabled = 0;
bogdanm 0:9b334a45a8ff 343
bogdanm 0:9b334a45a8ff 344 if (irq == RxIrq) {
bogdanm 0:9b334a45a8ff 345 __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_RXNE);
bogdanm 0:9b334a45a8ff 346 // Check if TxIrq is disabled too
bogdanm 0:9b334a45a8ff 347 if ((UartHandle.Instance->CR1 & USART_CR1_TCIE) == 0) all_disabled = 1;
bogdanm 0:9b334a45a8ff 348 } else { // TxIrq
bogdanm 0:9b334a45a8ff 349 __HAL_UART_DISABLE_IT(&UartHandle, UART_IT_TC);
bogdanm 0:9b334a45a8ff 350 // Check if RxIrq is disabled too
bogdanm 0:9b334a45a8ff 351 if ((UartHandle.Instance->CR1 & USART_CR1_RXNEIE) == 0) all_disabled = 1;
bogdanm 0:9b334a45a8ff 352 }
bogdanm 0:9b334a45a8ff 353
bogdanm 0:9b334a45a8ff 354 if (all_disabled) NVIC_DisableIRQ(irq_n);
bogdanm 0:9b334a45a8ff 355
bogdanm 0:9b334a45a8ff 356 }
bogdanm 0:9b334a45a8ff 357 }
bogdanm 0:9b334a45a8ff 358
bogdanm 0:9b334a45a8ff 359 /******************************************************************************
bogdanm 0:9b334a45a8ff 360 * READ/WRITE
bogdanm 0:9b334a45a8ff 361 ******************************************************************************/
bogdanm 0:9b334a45a8ff 362
bogdanm 0:9b334a45a8ff 363 int serial_getc(serial_t *obj)
bogdanm 0:9b334a45a8ff 364 {
bogdanm 0:9b334a45a8ff 365 USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 366 while (!serial_readable(obj));
bogdanm 0:9b334a45a8ff 367 return (int)(uart->RDR & (uint32_t)0xFF);
bogdanm 0:9b334a45a8ff 368 }
bogdanm 0:9b334a45a8ff 369
bogdanm 0:9b334a45a8ff 370 void serial_putc(serial_t *obj, int c)
bogdanm 0:9b334a45a8ff 371 {
bogdanm 0:9b334a45a8ff 372 USART_TypeDef *uart = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 373 while (!serial_writable(obj));
bogdanm 0:9b334a45a8ff 374 uart->TDR = (uint32_t)(c & (uint32_t)0xFF);
bogdanm 0:9b334a45a8ff 375 }
bogdanm 0:9b334a45a8ff 376
bogdanm 0:9b334a45a8ff 377 int serial_readable(serial_t *obj)
bogdanm 0:9b334a45a8ff 378 {
bogdanm 0:9b334a45a8ff 379 int status;
bogdanm 0:9b334a45a8ff 380 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 381 // Check if data is received
bogdanm 0:9b334a45a8ff 382 status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_RXNE) != RESET) ? 1 : 0);
bogdanm 0:9b334a45a8ff 383 return status;
bogdanm 0:9b334a45a8ff 384 }
bogdanm 0:9b334a45a8ff 385
bogdanm 0:9b334a45a8ff 386 int serial_writable(serial_t *obj)
bogdanm 0:9b334a45a8ff 387 {
bogdanm 0:9b334a45a8ff 388 int status;
bogdanm 0:9b334a45a8ff 389 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 390 // Check if data is transmitted
bogdanm 0:9b334a45a8ff 391 status = ((__HAL_UART_GET_FLAG(&UartHandle, UART_FLAG_TXE) != RESET) ? 1 : 0);
bogdanm 0:9b334a45a8ff 392 return status;
bogdanm 0:9b334a45a8ff 393 }
bogdanm 0:9b334a45a8ff 394
bogdanm 0:9b334a45a8ff 395 void serial_clear(serial_t *obj)
bogdanm 0:9b334a45a8ff 396 {
bogdanm 0:9b334a45a8ff 397 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 398 __HAL_UART_CLEAR_IT(&UartHandle, UART_CLEAR_TCF);
bogdanm 0:9b334a45a8ff 399 __HAL_UART_SEND_REQ(&UartHandle, UART_RXDATA_FLUSH_REQUEST);
bogdanm 0:9b334a45a8ff 400 }
bogdanm 0:9b334a45a8ff 401
bogdanm 0:9b334a45a8ff 402 void serial_pinout_tx(PinName tx)
bogdanm 0:9b334a45a8ff 403 {
bogdanm 0:9b334a45a8ff 404 pinmap_pinout(tx, PinMap_UART_TX);
bogdanm 0:9b334a45a8ff 405 }
bogdanm 0:9b334a45a8ff 406
bogdanm 0:9b334a45a8ff 407 void serial_break_set(serial_t *obj)
bogdanm 0:9b334a45a8ff 408 {
bogdanm 0:9b334a45a8ff 409 UartHandle.Instance = (USART_TypeDef *)(obj->uart);
bogdanm 0:9b334a45a8ff 410 __HAL_UART_SEND_REQ(&UartHandle, UART_SENDBREAK_REQUEST);
bogdanm 0:9b334a45a8ff 411 }
bogdanm 0:9b334a45a8ff 412
bogdanm 0:9b334a45a8ff 413 void serial_break_clear(serial_t *obj)
bogdanm 0:9b334a45a8ff 414 {
bogdanm 0:9b334a45a8ff 415 }
bogdanm 0:9b334a45a8ff 416
bogdanm 0:9b334a45a8ff 417 #endif