EL4121 Embedded System / mbed-os

mbed-os

Dependents:   cobaLCDJoyMotor_Thread odometry_omni_3roda_v3 odometry_omni_3roda_v1 odometry_omni_3roda_v2 ... more

targets/TARGET_STM/TARGET_STM32L4/serial_device.c@0:b74591d5ab33, 2017-12-11 (annotated)

Committer:
be_bryan
Date:
Mon Dec 11 17:54:04 2017 +0000
Revision:
0:b74591d5ab33
motor ++

Who changed what in which revision?

UserRevisionLine numberNew contents of line
be_bryan 0:b74591d5ab33 1 /* mbed Microcontroller Library
be_bryan 0:b74591d5ab33 2 *******************************************************************************
be_bryan 0:b74591d5ab33 3 * Copyright (c) 2015, STMicroelectronics
be_bryan 0:b74591d5ab33 4 * All rights reserved.
be_bryan 0:b74591d5ab33 5 *
be_bryan 0:b74591d5ab33 6 * Redistribution and use in source and binary forms, with or without
be_bryan 0:b74591d5ab33 7 * modification, are permitted provided that the following conditions are met:
be_bryan 0:b74591d5ab33 8 *
be_bryan 0:b74591d5ab33 9 * 1. Redistributions of source code must retain the above copyright notice,
be_bryan 0:b74591d5ab33 10 * this list of conditions and the following disclaimer.
be_bryan 0:b74591d5ab33 11 * 2. Redistributions in binary form must reproduce the above copyright notice,
be_bryan 0:b74591d5ab33 12 * this list of conditions and the following disclaimer in the documentation
be_bryan 0:b74591d5ab33 13 * and/or other materials provided with the distribution.
be_bryan 0:b74591d5ab33 14 * 3. Neither the name of STMicroelectronics nor the names of its contributors
be_bryan 0:b74591d5ab33 15 * may be used to endorse or promote products derived from this software
be_bryan 0:b74591d5ab33 16 * without specific prior written permission.
be_bryan 0:b74591d5ab33 17 *
be_bryan 0:b74591d5ab33 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
be_bryan 0:b74591d5ab33 19 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
be_bryan 0:b74591d5ab33 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
be_bryan 0:b74591d5ab33 21 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
be_bryan 0:b74591d5ab33 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
be_bryan 0:b74591d5ab33 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
be_bryan 0:b74591d5ab33 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
be_bryan 0:b74591d5ab33 25 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
be_bryan 0:b74591d5ab33 26 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
be_bryan 0:b74591d5ab33 27 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
be_bryan 0:b74591d5ab33 28 *******************************************************************************
be_bryan 0:b74591d5ab33 29 */
be_bryan 0:b74591d5ab33 30 #include "mbed_assert.h"
be_bryan 0:b74591d5ab33 31 #include "serial_api.h"
be_bryan 0:b74591d5ab33 32 #include "serial_api_hal.h"
be_bryan 0:b74591d5ab33 33
be_bryan 0:b74591d5ab33 34 #if DEVICE_SERIAL
be_bryan 0:b74591d5ab33 35
be_bryan 0:b74591d5ab33 36 #include "cmsis.h"
be_bryan 0:b74591d5ab33 37 #include "pinmap.h"
be_bryan 0:b74591d5ab33 38 #include "mbed_error.h"
be_bryan 0:b74591d5ab33 39 #include <string.h>
be_bryan 0:b74591d5ab33 40 #include "PeripheralPins.h"
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 #define UART_NUM (6)
be_bryan 0:b74591d5ab33 43
be_bryan 0:b74591d5ab33 44 static uint32_t serial_irq_ids[UART_NUM] = {0};
be_bryan 0:b74591d5ab33 45 UART_HandleTypeDef uart_handlers[UART_NUM];
be_bryan 0:b74591d5ab33 46
be_bryan 0:b74591d5ab33 47 static uart_irq_handler irq_handler;
be_bryan 0:b74591d5ab33 48
be_bryan 0:b74591d5ab33 49 int stdio_uart_inited = 0;
be_bryan 0:b74591d5ab33 50 serial_t stdio_uart;
be_bryan 0:b74591d5ab33 51
be_bryan 0:b74591d5ab33 52 void serial_init(serial_t *obj, PinName tx, PinName rx)
be_bryan 0:b74591d5ab33 53 {
be_bryan 0:b74591d5ab33 54 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 55
be_bryan 0:b74591d5ab33 56 // Determine the UART to use (UART_1, UART_2, ...)
be_bryan 0:b74591d5ab33 57 UARTName uart_tx = (UARTName)pinmap_peripheral(tx, PinMap_UART_TX);
be_bryan 0:b74591d5ab33 58 UARTName uart_rx = (UARTName)pinmap_peripheral(rx, PinMap_UART_RX);
be_bryan 0:b74591d5ab33 59
be_bryan 0:b74591d5ab33 60 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
be_bryan 0:b74591d5ab33 61 obj_s->uart = (UARTName)pinmap_merge(uart_tx, uart_rx);
be_bryan 0:b74591d5ab33 62 MBED_ASSERT(obj_s->uart != (UARTName)NC);
be_bryan 0:b74591d5ab33 63
be_bryan 0:b74591d5ab33 64 // Enable USART clock
be_bryan 0:b74591d5ab33 65 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 66 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 67 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 68 __HAL_RCC_USART1_CLK_ENABLE();
be_bryan 0:b74591d5ab33 69 obj_s->index = 0;
be_bryan 0:b74591d5ab33 70 }
be_bryan 0:b74591d5ab33 71 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 72 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 73 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 74 __HAL_RCC_USART2_CLK_ENABLE();
be_bryan 0:b74591d5ab33 75 obj_s->index = 1;
be_bryan 0:b74591d5ab33 76 }
be_bryan 0:b74591d5ab33 77
be_bryan 0:b74591d5ab33 78 #if defined(USART3_BASE)
be_bryan 0:b74591d5ab33 79 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 80 __HAL_RCC_USART3_FORCE_RESET();
be_bryan 0:b74591d5ab33 81 __HAL_RCC_USART3_RELEASE_RESET();
be_bryan 0:b74591d5ab33 82 __HAL_RCC_USART3_CLK_ENABLE();
be_bryan 0:b74591d5ab33 83 obj_s->index = 2;
be_bryan 0:b74591d5ab33 84 }
be_bryan 0:b74591d5ab33 85 #endif
be_bryan 0:b74591d5ab33 86
be_bryan 0:b74591d5ab33 87 #if defined(UART4_BASE)
be_bryan 0:b74591d5ab33 88 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 89 __HAL_RCC_UART4_FORCE_RESET();
be_bryan 0:b74591d5ab33 90 __HAL_RCC_UART4_RELEASE_RESET();
be_bryan 0:b74591d5ab33 91 __HAL_RCC_UART4_CLK_ENABLE();
be_bryan 0:b74591d5ab33 92 obj_s->index = 3;
be_bryan 0:b74591d5ab33 93 }
be_bryan 0:b74591d5ab33 94 #endif
be_bryan 0:b74591d5ab33 95
be_bryan 0:b74591d5ab33 96 #if defined(UART5_BASE)
be_bryan 0:b74591d5ab33 97 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 98 __HAL_RCC_UART5_FORCE_RESET();
be_bryan 0:b74591d5ab33 99 __HAL_RCC_UART5_RELEASE_RESET();
be_bryan 0:b74591d5ab33 100 __HAL_RCC_UART5_CLK_ENABLE();
be_bryan 0:b74591d5ab33 101 obj_s->index = 4;
be_bryan 0:b74591d5ab33 102 }
be_bryan 0:b74591d5ab33 103 #endif
be_bryan 0:b74591d5ab33 104
be_bryan 0:b74591d5ab33 105 #if defined(LPUART1_BASE)
be_bryan 0:b74591d5ab33 106 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 107 __HAL_RCC_LPUART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 108 __HAL_RCC_LPUART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 109 __HAL_RCC_LPUART1_CLK_ENABLE();
be_bryan 0:b74591d5ab33 110 obj_s->index = 5;
be_bryan 0:b74591d5ab33 111 }
be_bryan 0:b74591d5ab33 112 #endif
be_bryan 0:b74591d5ab33 113
be_bryan 0:b74591d5ab33 114 // Configure UART pins
be_bryan 0:b74591d5ab33 115 pinmap_pinout(tx, PinMap_UART_TX);
be_bryan 0:b74591d5ab33 116 pinmap_pinout(rx, PinMap_UART_RX);
be_bryan 0:b74591d5ab33 117
be_bryan 0:b74591d5ab33 118 if (tx != NC) {
be_bryan 0:b74591d5ab33 119 pin_mode(tx, PullUp);
be_bryan 0:b74591d5ab33 120 }
be_bryan 0:b74591d5ab33 121 if (rx != NC) {
be_bryan 0:b74591d5ab33 122 pin_mode(rx, PullUp);
be_bryan 0:b74591d5ab33 123 }
be_bryan 0:b74591d5ab33 124
be_bryan 0:b74591d5ab33 125 // Configure UART
be_bryan 0:b74591d5ab33 126 obj_s->baudrate = 9600;
be_bryan 0:b74591d5ab33 127 obj_s->databits = UART_WORDLENGTH_8B;
be_bryan 0:b74591d5ab33 128 obj_s->stopbits = UART_STOPBITS_1;
be_bryan 0:b74591d5ab33 129 obj_s->parity = UART_PARITY_NONE;
be_bryan 0:b74591d5ab33 130
be_bryan 0:b74591d5ab33 131 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 132 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 133 #endif
be_bryan 0:b74591d5ab33 134
be_bryan 0:b74591d5ab33 135 obj_s->pin_tx = tx;
be_bryan 0:b74591d5ab33 136 obj_s->pin_rx = rx;
be_bryan 0:b74591d5ab33 137
be_bryan 0:b74591d5ab33 138 init_uart(obj);
be_bryan 0:b74591d5ab33 139
be_bryan 0:b74591d5ab33 140 // For stdio management
be_bryan 0:b74591d5ab33 141 if (obj_s->uart == STDIO_UART) {
be_bryan 0:b74591d5ab33 142 stdio_uart_inited = 1;
be_bryan 0:b74591d5ab33 143 memcpy(&stdio_uart, obj, sizeof(serial_t));
be_bryan 0:b74591d5ab33 144 }
be_bryan 0:b74591d5ab33 145 }
be_bryan 0:b74591d5ab33 146
be_bryan 0:b74591d5ab33 147 void serial_free(serial_t *obj)
be_bryan 0:b74591d5ab33 148 {
be_bryan 0:b74591d5ab33 149 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 150
be_bryan 0:b74591d5ab33 151 // Reset UART and disable clock
be_bryan 0:b74591d5ab33 152 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 153 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 154 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 155 __HAL_RCC_USART1_CLK_DISABLE();
be_bryan 0:b74591d5ab33 156 }
be_bryan 0:b74591d5ab33 157
be_bryan 0:b74591d5ab33 158 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 159 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 160 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 161 __HAL_RCC_USART2_CLK_DISABLE();
be_bryan 0:b74591d5ab33 162 }
be_bryan 0:b74591d5ab33 163
be_bryan 0:b74591d5ab33 164 #if defined(USART3_BASE)
be_bryan 0:b74591d5ab33 165 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 166 __HAL_RCC_USART3_FORCE_RESET();
be_bryan 0:b74591d5ab33 167 __HAL_RCC_USART3_RELEASE_RESET();
be_bryan 0:b74591d5ab33 168 __HAL_RCC_USART3_CLK_DISABLE();
be_bryan 0:b74591d5ab33 169 }
be_bryan 0:b74591d5ab33 170 #endif
be_bryan 0:b74591d5ab33 171
be_bryan 0:b74591d5ab33 172 #if defined(UART4_BASE)
be_bryan 0:b74591d5ab33 173 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 174 __HAL_RCC_UART4_FORCE_RESET();
be_bryan 0:b74591d5ab33 175 __HAL_RCC_UART4_RELEASE_RESET();
be_bryan 0:b74591d5ab33 176 __HAL_RCC_UART4_CLK_DISABLE();
be_bryan 0:b74591d5ab33 177 }
be_bryan 0:b74591d5ab33 178 #endif
be_bryan 0:b74591d5ab33 179
be_bryan 0:b74591d5ab33 180 #if defined(UART5_BASE)
be_bryan 0:b74591d5ab33 181 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 182 __HAL_RCC_UART5_FORCE_RESET();
be_bryan 0:b74591d5ab33 183 __HAL_RCC_UART5_RELEASE_RESET();
be_bryan 0:b74591d5ab33 184 __HAL_RCC_UART5_CLK_DISABLE();
be_bryan 0:b74591d5ab33 185 }
be_bryan 0:b74591d5ab33 186 #endif
be_bryan 0:b74591d5ab33 187
be_bryan 0:b74591d5ab33 188 #if defined(LPUART1_BASE)
be_bryan 0:b74591d5ab33 189 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 190 __HAL_RCC_LPUART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 191 __HAL_RCC_LPUART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 192 __HAL_RCC_LPUART1_CLK_DISABLE();
be_bryan 0:b74591d5ab33 193 }
be_bryan 0:b74591d5ab33 194 #endif
be_bryan 0:b74591d5ab33 195
be_bryan 0:b74591d5ab33 196 // Configure GPIOs
be_bryan 0:b74591d5ab33 197 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 198 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 199
be_bryan 0:b74591d5ab33 200 serial_irq_ids[obj_s->index] = 0;
be_bryan 0:b74591d5ab33 201 }
be_bryan 0:b74591d5ab33 202
be_bryan 0:b74591d5ab33 203 void serial_baud(serial_t *obj, int baudrate)
be_bryan 0:b74591d5ab33 204 {
be_bryan 0:b74591d5ab33 205 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 206
be_bryan 0:b74591d5ab33 207 obj_s->baudrate = baudrate;
be_bryan 0:b74591d5ab33 208 init_uart(obj);
be_bryan 0:b74591d5ab33 209 }
be_bryan 0:b74591d5ab33 210
be_bryan 0:b74591d5ab33 211 /******************************************************************************
be_bryan 0:b74591d5ab33 212 * INTERRUPTS HANDLING
be_bryan 0:b74591d5ab33 213 ******************************************************************************/
be_bryan 0:b74591d5ab33 214
be_bryan 0:b74591d5ab33 215 static void uart_irq(int id)
be_bryan 0:b74591d5ab33 216 {
be_bryan 0:b74591d5ab33 217 UART_HandleTypeDef * huart = &uart_handlers[id];
be_bryan 0:b74591d5ab33 218
be_bryan 0:b74591d5ab33 219 if (serial_irq_ids[id] != 0) {
be_bryan 0:b74591d5ab33 220 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) {
be_bryan 0:b74591d5ab33 221 if (__HAL_UART_GET_IT(huart, UART_IT_TXE) != RESET) {
be_bryan 0:b74591d5ab33 222 irq_handler(serial_irq_ids[id], TxIrq);
be_bryan 0:b74591d5ab33 223 }
be_bryan 0:b74591d5ab33 224 }
be_bryan 0:b74591d5ab33 225 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 226 if (__HAL_UART_GET_IT(huart, UART_IT_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 227 irq_handler(serial_irq_ids[id], RxIrq);
be_bryan 0:b74591d5ab33 228 /* Flag has been cleared when reading the content */
be_bryan 0:b74591d5ab33 229 }
be_bryan 0:b74591d5ab33 230 }
be_bryan 0:b74591d5ab33 231 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 232 if (__HAL_UART_GET_IT(huart, UART_IT_ORE) != RESET) {
be_bryan 0:b74591d5ab33 233 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear ORE flag
be_bryan 0:b74591d5ab33 234 }
be_bryan 0:b74591d5ab33 235 }
be_bryan 0:b74591d5ab33 236 }
be_bryan 0:b74591d5ab33 237 }
be_bryan 0:b74591d5ab33 238
be_bryan 0:b74591d5ab33 239 static void uart1_irq(void)
be_bryan 0:b74591d5ab33 240 {
be_bryan 0:b74591d5ab33 241 uart_irq(0);
be_bryan 0:b74591d5ab33 242 }
be_bryan 0:b74591d5ab33 243
be_bryan 0:b74591d5ab33 244 static void uart2_irq(void)
be_bryan 0:b74591d5ab33 245 {
be_bryan 0:b74591d5ab33 246 uart_irq(1);
be_bryan 0:b74591d5ab33 247 }
be_bryan 0:b74591d5ab33 248
be_bryan 0:b74591d5ab33 249 #if defined(USART3_BASE)
be_bryan 0:b74591d5ab33 250 static void uart3_irq(void)
be_bryan 0:b74591d5ab33 251 {
be_bryan 0:b74591d5ab33 252 uart_irq(2);
be_bryan 0:b74591d5ab33 253 }
be_bryan 0:b74591d5ab33 254 #endif
be_bryan 0:b74591d5ab33 255
be_bryan 0:b74591d5ab33 256 #if defined(UART4_BASE)
be_bryan 0:b74591d5ab33 257 static void uart4_irq(void)
be_bryan 0:b74591d5ab33 258 {
be_bryan 0:b74591d5ab33 259 uart_irq(3);
be_bryan 0:b74591d5ab33 260 }
be_bryan 0:b74591d5ab33 261 #endif
be_bryan 0:b74591d5ab33 262
be_bryan 0:b74591d5ab33 263 #if defined(UART5_BASE)
be_bryan 0:b74591d5ab33 264 static void uart5_irq(void)
be_bryan 0:b74591d5ab33 265 {
be_bryan 0:b74591d5ab33 266 uart_irq(4);
be_bryan 0:b74591d5ab33 267 }
be_bryan 0:b74591d5ab33 268 #endif
be_bryan 0:b74591d5ab33 269
be_bryan 0:b74591d5ab33 270 #if defined(LPUART1_BASE)
be_bryan 0:b74591d5ab33 271 static void lpuart1_irq(void)
be_bryan 0:b74591d5ab33 272 {
be_bryan 0:b74591d5ab33 273 uart_irq(5);
be_bryan 0:b74591d5ab33 274 }
be_bryan 0:b74591d5ab33 275 #endif
be_bryan 0:b74591d5ab33 276
be_bryan 0:b74591d5ab33 277 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
be_bryan 0:b74591d5ab33 278 {
be_bryan 0:b74591d5ab33 279 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 280
be_bryan 0:b74591d5ab33 281 irq_handler = handler;
be_bryan 0:b74591d5ab33 282 serial_irq_ids[obj_s->index] = id;
be_bryan 0:b74591d5ab33 283 }
be_bryan 0:b74591d5ab33 284
be_bryan 0:b74591d5ab33 285 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
be_bryan 0:b74591d5ab33 286 {
be_bryan 0:b74591d5ab33 287 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 288 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 289 IRQn_Type irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 290 uint32_t vector = 0;
be_bryan 0:b74591d5ab33 291
be_bryan 0:b74591d5ab33 292 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 293 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 294 vector = (uint32_t)&uart1_irq;
be_bryan 0:b74591d5ab33 295 }
be_bryan 0:b74591d5ab33 296
be_bryan 0:b74591d5ab33 297 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 298 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 299 vector = (uint32_t)&uart2_irq;
be_bryan 0:b74591d5ab33 300 }
be_bryan 0:b74591d5ab33 301 #if defined(USART3_BASE)
be_bryan 0:b74591d5ab33 302 if (obj_s->uart == UART_3) {
be_bryan 0:b74591d5ab33 303 irq_n = USART3_IRQn;
be_bryan 0:b74591d5ab33 304 vector = (uint32_t)&uart3_irq;
be_bryan 0:b74591d5ab33 305 }
be_bryan 0:b74591d5ab33 306 #endif
be_bryan 0:b74591d5ab33 307 #if defined(UART4_BASE)
be_bryan 0:b74591d5ab33 308 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 309 irq_n = UART4_IRQn;
be_bryan 0:b74591d5ab33 310 vector = (uint32_t)&uart4_irq;
be_bryan 0:b74591d5ab33 311 }
be_bryan 0:b74591d5ab33 312 #endif
be_bryan 0:b74591d5ab33 313
be_bryan 0:b74591d5ab33 314 #if defined(UART5_BASE)
be_bryan 0:b74591d5ab33 315 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 316 irq_n = UART5_IRQn;
be_bryan 0:b74591d5ab33 317 vector = (uint32_t)&uart5_irq;
be_bryan 0:b74591d5ab33 318 }
be_bryan 0:b74591d5ab33 319 #endif
be_bryan 0:b74591d5ab33 320
be_bryan 0:b74591d5ab33 321 #if defined(LPUART1_BASE)
be_bryan 0:b74591d5ab33 322 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 323 irq_n = LPUART1_IRQn;
be_bryan 0:b74591d5ab33 324 vector = (uint32_t)&lpuart1_irq;
be_bryan 0:b74591d5ab33 325 }
be_bryan 0:b74591d5ab33 326 #endif
be_bryan 0:b74591d5ab33 327
be_bryan 0:b74591d5ab33 328 if (enable) {
be_bryan 0:b74591d5ab33 329 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 330 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 331 } else { // TxIrq
be_bryan 0:b74591d5ab33 332 __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 333 }
be_bryan 0:b74591d5ab33 334 NVIC_SetVector(irq_n, vector);
be_bryan 0:b74591d5ab33 335 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 336
be_bryan 0:b74591d5ab33 337 } else { // disable
be_bryan 0:b74591d5ab33 338 int all_disabled = 0;
be_bryan 0:b74591d5ab33 339 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 340 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 341 // Check if TxIrq is disabled too
be_bryan 0:b74591d5ab33 342 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
be_bryan 0:b74591d5ab33 343 all_disabled = 1;
be_bryan 0:b74591d5ab33 344 }
be_bryan 0:b74591d5ab33 345 } else { // TxIrq
be_bryan 0:b74591d5ab33 346 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 347 // Check if RxIrq is disabled too
be_bryan 0:b74591d5ab33 348 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
be_bryan 0:b74591d5ab33 349 all_disabled = 1;
be_bryan 0:b74591d5ab33 350 }
be_bryan 0:b74591d5ab33 351 }
be_bryan 0:b74591d5ab33 352
be_bryan 0:b74591d5ab33 353 if (all_disabled) {
be_bryan 0:b74591d5ab33 354 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 355 }
be_bryan 0:b74591d5ab33 356 }
be_bryan 0:b74591d5ab33 357 }
be_bryan 0:b74591d5ab33 358
be_bryan 0:b74591d5ab33 359 /******************************************************************************
be_bryan 0:b74591d5ab33 360 * READ/WRITE
be_bryan 0:b74591d5ab33 361 ******************************************************************************/
be_bryan 0:b74591d5ab33 362
be_bryan 0:b74591d5ab33 363 int serial_getc(serial_t *obj)
be_bryan 0:b74591d5ab33 364 {
be_bryan 0:b74591d5ab33 365 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 366 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 367
be_bryan 0:b74591d5ab33 368 while (!serial_readable(obj));
be_bryan 0:b74591d5ab33 369 if (obj_s->databits == UART_WORDLENGTH_8B) {
be_bryan 0:b74591d5ab33 370 return (int)(huart->Instance->RDR & (uint8_t)0xFF);
be_bryan 0:b74591d5ab33 371 } else {
be_bryan 0:b74591d5ab33 372 return (int)(huart->Instance->RDR & (uint16_t)0x1FF);
be_bryan 0:b74591d5ab33 373 }
be_bryan 0:b74591d5ab33 374 }
be_bryan 0:b74591d5ab33 375
be_bryan 0:b74591d5ab33 376 void serial_putc(serial_t *obj, int c)
be_bryan 0:b74591d5ab33 377 {
be_bryan 0:b74591d5ab33 378 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 379 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 380
be_bryan 0:b74591d5ab33 381 while (!serial_writable(obj));
be_bryan 0:b74591d5ab33 382 if (obj_s->databits == UART_WORDLENGTH_8B) {
be_bryan 0:b74591d5ab33 383 huart->Instance->TDR = (uint8_t)(c & (uint8_t)0xFF);
be_bryan 0:b74591d5ab33 384 } else {
be_bryan 0:b74591d5ab33 385 huart->Instance->TDR = (uint16_t)(c & (uint16_t)0x1FF);
be_bryan 0:b74591d5ab33 386 }
be_bryan 0:b74591d5ab33 387 }
be_bryan 0:b74591d5ab33 388
be_bryan 0:b74591d5ab33 389 void serial_clear(serial_t *obj)
be_bryan 0:b74591d5ab33 390 {
be_bryan 0:b74591d5ab33 391 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 392 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 393
be_bryan 0:b74591d5ab33 394 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 395 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 396 }
be_bryan 0:b74591d5ab33 397
be_bryan 0:b74591d5ab33 398 void serial_break_set(serial_t *obj)
be_bryan 0:b74591d5ab33 399 {
be_bryan 0:b74591d5ab33 400 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 401 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 402
be_bryan 0:b74591d5ab33 403 HAL_LIN_SendBreak(huart);
be_bryan 0:b74591d5ab33 404 }
be_bryan 0:b74591d5ab33 405
be_bryan 0:b74591d5ab33 406 #if DEVICE_SERIAL_ASYNCH
be_bryan 0:b74591d5ab33 407
be_bryan 0:b74591d5ab33 408 /******************************************************************************
be_bryan 0:b74591d5ab33 409 * LOCAL HELPER FUNCTIONS
be_bryan 0:b74591d5ab33 410 ******************************************************************************/
be_bryan 0:b74591d5ab33 411
be_bryan 0:b74591d5ab33 412 /**
be_bryan 0:b74591d5ab33 413 * Configure the TX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 414 *
be_bryan 0:b74591d5ab33 415 * @param obj The serial object.
be_bryan 0:b74591d5ab33 416 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 417 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 418 */
be_bryan 0:b74591d5ab33 419 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
be_bryan 0:b74591d5ab33 420 {
be_bryan 0:b74591d5ab33 421 (void)width;
be_bryan 0:b74591d5ab33 422
be_bryan 0:b74591d5ab33 423 // Exit if a transmit is already on-going
be_bryan 0:b74591d5ab33 424 if (serial_tx_active(obj)) {
be_bryan 0:b74591d5ab33 425 return;
be_bryan 0:b74591d5ab33 426 }
be_bryan 0:b74591d5ab33 427
be_bryan 0:b74591d5ab33 428 obj->tx_buff.buffer = tx;
be_bryan 0:b74591d5ab33 429 obj->tx_buff.length = tx_length;
be_bryan 0:b74591d5ab33 430 obj->tx_buff.pos = 0;
be_bryan 0:b74591d5ab33 431 }
be_bryan 0:b74591d5ab33 432
be_bryan 0:b74591d5ab33 433 /**
be_bryan 0:b74591d5ab33 434 * Configure the RX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 435 *
be_bryan 0:b74591d5ab33 436 * @param obj The serial object.
be_bryan 0:b74591d5ab33 437 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 438 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 439 */
be_bryan 0:b74591d5ab33 440 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
be_bryan 0:b74591d5ab33 441 {
be_bryan 0:b74591d5ab33 442 (void)width;
be_bryan 0:b74591d5ab33 443
be_bryan 0:b74591d5ab33 444 // Exit if a reception is already on-going
be_bryan 0:b74591d5ab33 445 if (serial_rx_active(obj)) {
be_bryan 0:b74591d5ab33 446 return;
be_bryan 0:b74591d5ab33 447 }
be_bryan 0:b74591d5ab33 448
be_bryan 0:b74591d5ab33 449 obj->rx_buff.buffer = rx;
be_bryan 0:b74591d5ab33 450 obj->rx_buff.length = rx_length;
be_bryan 0:b74591d5ab33 451 obj->rx_buff.pos = 0;
be_bryan 0:b74591d5ab33 452 }
be_bryan 0:b74591d5ab33 453
be_bryan 0:b74591d5ab33 454 /**
be_bryan 0:b74591d5ab33 455 * Configure events
be_bryan 0:b74591d5ab33 456 *
be_bryan 0:b74591d5ab33 457 * @param obj The serial object
be_bryan 0:b74591d5ab33 458 * @param event The logical OR of the events to configure
be_bryan 0:b74591d5ab33 459 * @param enable Set to non-zero to enable events, or zero to disable them
be_bryan 0:b74591d5ab33 460 */
be_bryan 0:b74591d5ab33 461 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
be_bryan 0:b74591d5ab33 462 {
be_bryan 0:b74591d5ab33 463 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 464
be_bryan 0:b74591d5ab33 465 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
be_bryan 0:b74591d5ab33 466 if (enable) {
be_bryan 0:b74591d5ab33 467 obj_s->events |= event;
be_bryan 0:b74591d5ab33 468 } else {
be_bryan 0:b74591d5ab33 469 obj_s->events &= ~event;
be_bryan 0:b74591d5ab33 470 }
be_bryan 0:b74591d5ab33 471 }
be_bryan 0:b74591d5ab33 472
be_bryan 0:b74591d5ab33 473
be_bryan 0:b74591d5ab33 474 /**
be_bryan 0:b74591d5ab33 475 * Get index of serial object TX IRQ, relating it to the physical peripheral.
be_bryan 0:b74591d5ab33 476 *
be_bryan 0:b74591d5ab33 477 * @param obj pointer to serial object
be_bryan 0:b74591d5ab33 478 * @return internal NVIC TX IRQ index of U(S)ART peripheral
be_bryan 0:b74591d5ab33 479 */
be_bryan 0:b74591d5ab33 480 static IRQn_Type serial_get_irq_n(serial_t *obj)
be_bryan 0:b74591d5ab33 481 {
be_bryan 0:b74591d5ab33 482 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 483 IRQn_Type irq_n;
be_bryan 0:b74591d5ab33 484
be_bryan 0:b74591d5ab33 485 switch (obj_s->index) {
be_bryan 0:b74591d5ab33 486 case 0:
be_bryan 0:b74591d5ab33 487 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 488 break;
be_bryan 0:b74591d5ab33 489
be_bryan 0:b74591d5ab33 490 case 1:
be_bryan 0:b74591d5ab33 491 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 492 break;
be_bryan 0:b74591d5ab33 493
be_bryan 0:b74591d5ab33 494 #if defined(UART3_BASE)
be_bryan 0:b74591d5ab33 495 case 2:
be_bryan 0:b74591d5ab33 496 irq_n = USART3_IRQn;
be_bryan 0:b74591d5ab33 497 break;
be_bryan 0:b74591d5ab33 498 #endif
be_bryan 0:b74591d5ab33 499 #if defined(UART4_BASE)
be_bryan 0:b74591d5ab33 500 case 3:
be_bryan 0:b74591d5ab33 501 irq_n = UART4_IRQn;
be_bryan 0:b74591d5ab33 502 break;
be_bryan 0:b74591d5ab33 503 #endif
be_bryan 0:b74591d5ab33 504 #if defined(UART5_BASE)
be_bryan 0:b74591d5ab33 505 case 4:
be_bryan 0:b74591d5ab33 506 irq_n = UART5_IRQn;
be_bryan 0:b74591d5ab33 507 break;
be_bryan 0:b74591d5ab33 508 #endif
be_bryan 0:b74591d5ab33 509 #if defined(LPUART1_BASE)
be_bryan 0:b74591d5ab33 510 case 5:
be_bryan 0:b74591d5ab33 511 irq_n = LPUART1_IRQn;
be_bryan 0:b74591d5ab33 512 break;
be_bryan 0:b74591d5ab33 513 #endif
be_bryan 0:b74591d5ab33 514
be_bryan 0:b74591d5ab33 515 default:
be_bryan 0:b74591d5ab33 516 irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 517 }
be_bryan 0:b74591d5ab33 518
be_bryan 0:b74591d5ab33 519 return irq_n;
be_bryan 0:b74591d5ab33 520 }
be_bryan 0:b74591d5ab33 521
be_bryan 0:b74591d5ab33 522 /******************************************************************************
be_bryan 0:b74591d5ab33 523 * MBED API FUNCTIONS
be_bryan 0:b74591d5ab33 524 ******************************************************************************/
be_bryan 0:b74591d5ab33 525
be_bryan 0:b74591d5ab33 526 /**
be_bryan 0:b74591d5ab33 527 * Begin asynchronous TX transfer. The used buffer is specified in the serial
be_bryan 0:b74591d5ab33 528 * object, tx_buff
be_bryan 0:b74591d5ab33 529 *
be_bryan 0:b74591d5ab33 530 * @param obj The serial object
be_bryan 0:b74591d5ab33 531 * @param tx The buffer for sending
be_bryan 0:b74591d5ab33 532 * @param tx_length The number of words to transmit
be_bryan 0:b74591d5ab33 533 * @param tx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 534 * @param handler The serial handler
be_bryan 0:b74591d5ab33 535 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 536 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 537 * @return Returns number of data transfered, or 0 otherwise
be_bryan 0:b74591d5ab33 538 */
be_bryan 0:b74591d5ab33 539 int serial_tx_asynch(serial_t *obj, const void *tx, size_t tx_length, uint8_t tx_width, uint32_t handler, uint32_t event, DMAUsage hint)
be_bryan 0:b74591d5ab33 540 {
be_bryan 0:b74591d5ab33 541 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 542 (void) hint;
be_bryan 0:b74591d5ab33 543
be_bryan 0:b74591d5ab33 544 // Check buffer is ok
be_bryan 0:b74591d5ab33 545 MBED_ASSERT(tx != (void*)0);
be_bryan 0:b74591d5ab33 546 MBED_ASSERT(tx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 547
be_bryan 0:b74591d5ab33 548 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 549 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 550
be_bryan 0:b74591d5ab33 551 if (tx_length == 0) {
be_bryan 0:b74591d5ab33 552 return 0;
be_bryan 0:b74591d5ab33 553 }
be_bryan 0:b74591d5ab33 554
be_bryan 0:b74591d5ab33 555 // Set up buffer
be_bryan 0:b74591d5ab33 556 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
be_bryan 0:b74591d5ab33 557
be_bryan 0:b74591d5ab33 558 // Set up events
be_bryan 0:b74591d5ab33 559 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
be_bryan 0:b74591d5ab33 560 serial_enable_event(obj, event, 1); // Set only the wanted events
be_bryan 0:b74591d5ab33 561
be_bryan 0:b74591d5ab33 562 // Enable interrupt
be_bryan 0:b74591d5ab33 563 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 564 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 565 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 566 NVIC_SetPriority(irq_n, 1);
be_bryan 0:b74591d5ab33 567 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 568 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 569
be_bryan 0:b74591d5ab33 570 // the following function will enable UART_IT_TXE and error interrupts
be_bryan 0:b74591d5ab33 571 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
be_bryan 0:b74591d5ab33 572 return 0;
be_bryan 0:b74591d5ab33 573 }
be_bryan 0:b74591d5ab33 574
be_bryan 0:b74591d5ab33 575 return tx_length;
be_bryan 0:b74591d5ab33 576 }
be_bryan 0:b74591d5ab33 577
be_bryan 0:b74591d5ab33 578 /**
be_bryan 0:b74591d5ab33 579 * Begin asynchronous RX transfer (enable interrupt for data collecting)
be_bryan 0:b74591d5ab33 580 * The used buffer is specified in the serial object, rx_buff
be_bryan 0:b74591d5ab33 581 *
be_bryan 0:b74591d5ab33 582 * @param obj The serial object
be_bryan 0:b74591d5ab33 583 * @param rx The buffer for sending
be_bryan 0:b74591d5ab33 584 * @param rx_length The number of words to transmit
be_bryan 0:b74591d5ab33 585 * @param rx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 586 * @param handler The serial handler
be_bryan 0:b74591d5ab33 587 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 588 * @param handler The serial handler
be_bryan 0:b74591d5ab33 589 * @param char_match A character in range 0-254 to be matched
be_bryan 0:b74591d5ab33 590 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 591 */
be_bryan 0:b74591d5ab33 592 void serial_rx_asynch(serial_t *obj, void *rx, size_t rx_length, uint8_t rx_width, uint32_t handler, uint32_t event, uint8_t char_match, DMAUsage hint)
be_bryan 0:b74591d5ab33 593 {
be_bryan 0:b74591d5ab33 594 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 595 (void) hint;
be_bryan 0:b74591d5ab33 596
be_bryan 0:b74591d5ab33 597 /* Sanity check arguments */
be_bryan 0:b74591d5ab33 598 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 599 MBED_ASSERT(rx != (void*)0);
be_bryan 0:b74591d5ab33 600 MBED_ASSERT(rx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 601
be_bryan 0:b74591d5ab33 602 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 603 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 604
be_bryan 0:b74591d5ab33 605 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
be_bryan 0:b74591d5ab33 606 serial_enable_event(obj, event, 1);
be_bryan 0:b74591d5ab33 607
be_bryan 0:b74591d5ab33 608 // set CharMatch
be_bryan 0:b74591d5ab33 609 obj->char_match = char_match;
be_bryan 0:b74591d5ab33 610
be_bryan 0:b74591d5ab33 611 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
be_bryan 0:b74591d5ab33 612
be_bryan 0:b74591d5ab33 613 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 614 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 615 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 616 NVIC_SetPriority(irq_n, 0);
be_bryan 0:b74591d5ab33 617 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 618 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 619
be_bryan 0:b74591d5ab33 620 // following HAL function will enable the RXNE interrupt + error interrupts
be_bryan 0:b74591d5ab33 621 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
be_bryan 0:b74591d5ab33 622 }
be_bryan 0:b74591d5ab33 623
be_bryan 0:b74591d5ab33 624 /**
be_bryan 0:b74591d5ab33 625 * Attempts to determine if the serial peripheral is already in use for TX
be_bryan 0:b74591d5ab33 626 *
be_bryan 0:b74591d5ab33 627 * @param obj The serial object
be_bryan 0:b74591d5ab33 628 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 629 */
be_bryan 0:b74591d5ab33 630 uint8_t serial_tx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 631 {
be_bryan 0:b74591d5ab33 632 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 633
be_bryan 0:b74591d5ab33 634 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 635 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 636
be_bryan 0:b74591d5ab33 637 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
be_bryan 0:b74591d5ab33 638 }
be_bryan 0:b74591d5ab33 639
be_bryan 0:b74591d5ab33 640 /**
be_bryan 0:b74591d5ab33 641 * Attempts to determine if the serial peripheral is already in use for RX
be_bryan 0:b74591d5ab33 642 *
be_bryan 0:b74591d5ab33 643 * @param obj The serial object
be_bryan 0:b74591d5ab33 644 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 645 */
be_bryan 0:b74591d5ab33 646 uint8_t serial_rx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 647 {
be_bryan 0:b74591d5ab33 648 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 649
be_bryan 0:b74591d5ab33 650 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 651 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 652
be_bryan 0:b74591d5ab33 653 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
be_bryan 0:b74591d5ab33 654 }
be_bryan 0:b74591d5ab33 655
be_bryan 0:b74591d5ab33 656 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
be_bryan 0:b74591d5ab33 657 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 658 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
be_bryan 0:b74591d5ab33 659 }
be_bryan 0:b74591d5ab33 660 }
be_bryan 0:b74591d5ab33 661
be_bryan 0:b74591d5ab33 662 void HAL_UART_ErrorCallback(UART_HandleTypeDef *huart) {
be_bryan 0:b74591d5ab33 663 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
be_bryan 0:b74591d5ab33 664 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear PE flag
be_bryan 0:b74591d5ab33 665 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
be_bryan 0:b74591d5ab33 666 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear FE flag
be_bryan 0:b74591d5ab33 667 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
be_bryan 0:b74591d5ab33 668 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear NE flag
be_bryan 0:b74591d5ab33 669 } else if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 670 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear ORE flag
be_bryan 0:b74591d5ab33 671 }
be_bryan 0:b74591d5ab33 672 }
be_bryan 0:b74591d5ab33 673
be_bryan 0:b74591d5ab33 674 /**
be_bryan 0:b74591d5ab33 675 * The asynchronous TX and RX handler.
be_bryan 0:b74591d5ab33 676 *
be_bryan 0:b74591d5ab33 677 * @param obj The serial object
be_bryan 0:b74591d5ab33 678 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
be_bryan 0:b74591d5ab33 679 */
be_bryan 0:b74591d5ab33 680 int serial_irq_handler_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 681 {
be_bryan 0:b74591d5ab33 682 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 683 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 684
be_bryan 0:b74591d5ab33 685 volatile int return_event = 0;
be_bryan 0:b74591d5ab33 686 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
be_bryan 0:b74591d5ab33 687 uint8_t i = 0;
be_bryan 0:b74591d5ab33 688
be_bryan 0:b74591d5ab33 689 // TX PART:
be_bryan 0:b74591d5ab33 690 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 691 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
be_bryan 0:b74591d5ab33 692 // Return event SERIAL_EVENT_TX_COMPLETE if requested
be_bryan 0:b74591d5ab33 693 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
be_bryan 0:b74591d5ab33 694 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 695 }
be_bryan 0:b74591d5ab33 696 }
be_bryan 0:b74591d5ab33 697 }
be_bryan 0:b74591d5ab33 698
be_bryan 0:b74591d5ab33 699 // Handle error events
be_bryan 0:b74591d5ab33 700 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
be_bryan 0:b74591d5ab33 701 if (__HAL_UART_GET_IT(huart, UART_IT_PE) != RESET) {
be_bryan 0:b74591d5ab33 702 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 703 }
be_bryan 0:b74591d5ab33 704 }
be_bryan 0:b74591d5ab33 705
be_bryan 0:b74591d5ab33 706 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
be_bryan 0:b74591d5ab33 707 if (__HAL_UART_GET_IT(huart, UART_IT_FE) != RESET) {
be_bryan 0:b74591d5ab33 708 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 709 }
be_bryan 0:b74591d5ab33 710 }
be_bryan 0:b74591d5ab33 711
be_bryan 0:b74591d5ab33 712 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 713 if (__HAL_UART_GET_IT(huart, UART_IT_ORE) != RESET) {
be_bryan 0:b74591d5ab33 714 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 715 }
be_bryan 0:b74591d5ab33 716 }
be_bryan 0:b74591d5ab33 717
be_bryan 0:b74591d5ab33 718 HAL_UART_IRQHandler(huart);
be_bryan 0:b74591d5ab33 719
be_bryan 0:b74591d5ab33 720 // Abort if an error occurs
be_bryan 0:b74591d5ab33 721 if ((return_event & SERIAL_EVENT_RX_PARITY_ERROR) ||
be_bryan 0:b74591d5ab33 722 (return_event & SERIAL_EVENT_RX_FRAMING_ERROR) ||
be_bryan 0:b74591d5ab33 723 (return_event & SERIAL_EVENT_RX_OVERRUN_ERROR)) {
be_bryan 0:b74591d5ab33 724 return return_event;
be_bryan 0:b74591d5ab33 725 }
be_bryan 0:b74591d5ab33 726
be_bryan 0:b74591d5ab33 727 //RX PART
be_bryan 0:b74591d5ab33 728 if (huart->RxXferSize != 0) {
be_bryan 0:b74591d5ab33 729 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
be_bryan 0:b74591d5ab33 730 }
be_bryan 0:b74591d5ab33 731 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
be_bryan 0:b74591d5ab33 732 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 733 }
be_bryan 0:b74591d5ab33 734
be_bryan 0:b74591d5ab33 735 // Check if char_match is present
be_bryan 0:b74591d5ab33 736 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
be_bryan 0:b74591d5ab33 737 if (buf != NULL) {
be_bryan 0:b74591d5ab33 738 for (i = 0; i < obj->rx_buff.pos; i++) {
be_bryan 0:b74591d5ab33 739 if (buf[i] == obj->char_match) {
be_bryan 0:b74591d5ab33 740 obj->rx_buff.pos = i;
be_bryan 0:b74591d5ab33 741 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
be_bryan 0:b74591d5ab33 742 serial_rx_abort_asynch(obj);
be_bryan 0:b74591d5ab33 743 break;
be_bryan 0:b74591d5ab33 744 }
be_bryan 0:b74591d5ab33 745 }
be_bryan 0:b74591d5ab33 746 }
be_bryan 0:b74591d5ab33 747 }
be_bryan 0:b74591d5ab33 748
be_bryan 0:b74591d5ab33 749 return return_event;
be_bryan 0:b74591d5ab33 750 }
be_bryan 0:b74591d5ab33 751
be_bryan 0:b74591d5ab33 752 /**
be_bryan 0:b74591d5ab33 753 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
be_bryan 0:b74591d5ab33 754 * flush TX hardware buffer if TX FIFO is used
be_bryan 0:b74591d5ab33 755 *
be_bryan 0:b74591d5ab33 756 * @param obj The serial object
be_bryan 0:b74591d5ab33 757 */
be_bryan 0:b74591d5ab33 758 void serial_tx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 759 {
be_bryan 0:b74591d5ab33 760 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 761 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 762
be_bryan 0:b74591d5ab33 763 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
be_bryan 0:b74591d5ab33 764 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 765
be_bryan 0:b74591d5ab33 766 // clear flags
be_bryan 0:b74591d5ab33 767 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_TC);
be_bryan 0:b74591d5ab33 768
be_bryan 0:b74591d5ab33 769 // reset states
be_bryan 0:b74591d5ab33 770 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 771 // update handle state
be_bryan 0:b74591d5ab33 772 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 773 huart->gState = HAL_UART_STATE_BUSY_RX;
be_bryan 0:b74591d5ab33 774 } else {
be_bryan 0:b74591d5ab33 775 huart->gState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 776 }
be_bryan 0:b74591d5ab33 777 }
be_bryan 0:b74591d5ab33 778
be_bryan 0:b74591d5ab33 779 /**
be_bryan 0:b74591d5ab33 780 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
be_bryan 0:b74591d5ab33 781 * flush RX hardware buffer if RX FIFO is used
be_bryan 0:b74591d5ab33 782 *
be_bryan 0:b74591d5ab33 783 * @param obj The serial object
be_bryan 0:b74591d5ab33 784 */
be_bryan 0:b74591d5ab33 785 void serial_rx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 786 {
be_bryan 0:b74591d5ab33 787 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 788 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 789
be_bryan 0:b74591d5ab33 790 // disable interrupts
be_bryan 0:b74591d5ab33 791 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 792 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
be_bryan 0:b74591d5ab33 793 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
be_bryan 0:b74591d5ab33 794
be_bryan 0:b74591d5ab33 795 // clear flags
be_bryan 0:b74591d5ab33 796 __HAL_UART_CLEAR_FLAG(huart, UART_FLAG_RXNE);
be_bryan 0:b74591d5ab33 797 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear errors flag
be_bryan 0:b74591d5ab33 798
be_bryan 0:b74591d5ab33 799 // reset states
be_bryan 0:b74591d5ab33 800 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 801 // update handle state
be_bryan 0:b74591d5ab33 802 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 803 huart->RxState = HAL_UART_STATE_BUSY_TX;
be_bryan 0:b74591d5ab33 804 } else {
be_bryan 0:b74591d5ab33 805 huart->RxState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 806 }
be_bryan 0:b74591d5ab33 807 }
be_bryan 0:b74591d5ab33 808
be_bryan 0:b74591d5ab33 809 #endif
be_bryan 0:b74591d5ab33 810
be_bryan 0:b74591d5ab33 811 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 812
be_bryan 0:b74591d5ab33 813 /**
be_bryan 0:b74591d5ab33 814 * Set HW Control Flow
be_bryan 0:b74591d5ab33 815 * @param obj The serial object
be_bryan 0:b74591d5ab33 816 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
be_bryan 0:b74591d5ab33 817 * @param rxflow Pin for the rxflow
be_bryan 0:b74591d5ab33 818 * @param txflow Pin for the txflow
be_bryan 0:b74591d5ab33 819 */
be_bryan 0:b74591d5ab33 820 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
be_bryan 0:b74591d5ab33 821 {
be_bryan 0:b74591d5ab33 822 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 823
be_bryan 0:b74591d5ab33 824 // Determine the UART to use (UART_1, UART_2, ...)
be_bryan 0:b74591d5ab33 825 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 826 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 827
be_bryan 0:b74591d5ab33 828 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
be_bryan 0:b74591d5ab33 829 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
be_bryan 0:b74591d5ab33 830 MBED_ASSERT(obj_s->uart != (UARTName)NC);
be_bryan 0:b74591d5ab33 831
be_bryan 0:b74591d5ab33 832 if(type == FlowControlNone) {
be_bryan 0:b74591d5ab33 833 // Disable hardware flow control
be_bryan 0:b74591d5ab33 834 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 835 }
be_bryan 0:b74591d5ab33 836 if (type == FlowControlRTS) {
be_bryan 0:b74591d5ab33 837 // Enable RTS
be_bryan 0:b74591d5ab33 838 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 839 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
be_bryan 0:b74591d5ab33 840 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 841 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 842 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 843 }
be_bryan 0:b74591d5ab33 844 if (type == FlowControlCTS) {
be_bryan 0:b74591d5ab33 845 // Enable CTS
be_bryan 0:b74591d5ab33 846 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 847 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
be_bryan 0:b74591d5ab33 848 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 849 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 850 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 851 }
be_bryan 0:b74591d5ab33 852 if (type == FlowControlRTSCTS) {
be_bryan 0:b74591d5ab33 853 // Enable CTS & RTS
be_bryan 0:b74591d5ab33 854 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 855 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 856 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
be_bryan 0:b74591d5ab33 857 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 858 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 859 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 860 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 861 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 862 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 863 }
be_bryan 0:b74591d5ab33 864
be_bryan 0:b74591d5ab33 865 init_uart(obj);
be_bryan 0:b74591d5ab33 866 }
be_bryan 0:b74591d5ab33 867
be_bryan 0:b74591d5ab33 868 #endif
be_bryan 0:b74591d5ab33 869
be_bryan 0:b74591d5ab33 870 #endif