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_STM32L0/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 <string.h>
be_bryan 0:b74591d5ab33 39 #include "PeripheralPins.h"
be_bryan 0:b74591d5ab33 40 #include "mbed_error.h"
be_bryan 0:b74591d5ab33 41
be_bryan 0:b74591d5ab33 42 #define UART_NUM (5)
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 UART clock
be_bryan 0:b74591d5ab33 65 #if defined(USART1_BASE)
be_bryan 0:b74591d5ab33 66 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 67 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 68 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 69 __HAL_RCC_USART1_CLK_ENABLE();
be_bryan 0:b74591d5ab33 70 obj_s->index = 0;
be_bryan 0:b74591d5ab33 71 }
be_bryan 0:b74591d5ab33 72 #endif
be_bryan 0:b74591d5ab33 73
be_bryan 0:b74591d5ab33 74 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 75 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 76 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 77 __HAL_RCC_USART2_CLK_ENABLE();
be_bryan 0:b74591d5ab33 78 obj_s->index = 1;
be_bryan 0:b74591d5ab33 79 }
be_bryan 0:b74591d5ab33 80
be_bryan 0:b74591d5ab33 81 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 82 __HAL_RCC_LPUART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 83 __HAL_RCC_LPUART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 84 __HAL_RCC_LPUART1_CLK_ENABLE();
be_bryan 0:b74591d5ab33 85 obj_s->index = 2;
be_bryan 0:b74591d5ab33 86 }
be_bryan 0:b74591d5ab33 87
be_bryan 0:b74591d5ab33 88 #if defined(USART4_BASE)
be_bryan 0:b74591d5ab33 89 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 90 __HAL_RCC_USART4_FORCE_RESET();
be_bryan 0:b74591d5ab33 91 __HAL_RCC_USART4_RELEASE_RESET();
be_bryan 0:b74591d5ab33 92 __HAL_RCC_USART4_CLK_ENABLE();
be_bryan 0:b74591d5ab33 93 obj_s->index = 3;
be_bryan 0:b74591d5ab33 94 }
be_bryan 0:b74591d5ab33 95 #endif
be_bryan 0:b74591d5ab33 96
be_bryan 0:b74591d5ab33 97 #if defined(USART5_BASE)
be_bryan 0:b74591d5ab33 98 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 99 __HAL_RCC_USART5_FORCE_RESET();
be_bryan 0:b74591d5ab33 100 __HAL_RCC_USART5_RELEASE_RESET();
be_bryan 0:b74591d5ab33 101 __HAL_RCC_USART5_CLK_ENABLE();
be_bryan 0:b74591d5ab33 102 obj_s->index = 4;
be_bryan 0:b74591d5ab33 103 }
be_bryan 0:b74591d5ab33 104 #endif
be_bryan 0:b74591d5ab33 105
be_bryan 0:b74591d5ab33 106 // Configure the UART pins
be_bryan 0:b74591d5ab33 107 pinmap_pinout(tx, PinMap_UART_TX);
be_bryan 0:b74591d5ab33 108 pinmap_pinout(rx, PinMap_UART_RX);
be_bryan 0:b74591d5ab33 109
be_bryan 0:b74591d5ab33 110 if (tx != NC) {
be_bryan 0:b74591d5ab33 111 pin_mode(tx, PullUp);
be_bryan 0:b74591d5ab33 112 }
be_bryan 0:b74591d5ab33 113 if (rx != NC) {
be_bryan 0:b74591d5ab33 114 pin_mode(rx, PullUp);
be_bryan 0:b74591d5ab33 115 }
be_bryan 0:b74591d5ab33 116
be_bryan 0:b74591d5ab33 117 // Configure UART
be_bryan 0:b74591d5ab33 118 obj_s->baudrate = 9600;
be_bryan 0:b74591d5ab33 119 obj_s->databits = UART_WORDLENGTH_8B;
be_bryan 0:b74591d5ab33 120 obj_s->stopbits = UART_STOPBITS_1;
be_bryan 0:b74591d5ab33 121 obj_s->parity = UART_PARITY_NONE;
be_bryan 0:b74591d5ab33 122
be_bryan 0:b74591d5ab33 123 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 124 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 125 #endif
be_bryan 0:b74591d5ab33 126
be_bryan 0:b74591d5ab33 127 obj_s->pin_tx = tx;
be_bryan 0:b74591d5ab33 128 obj_s->pin_rx = rx;
be_bryan 0:b74591d5ab33 129
be_bryan 0:b74591d5ab33 130 init_uart(obj);
be_bryan 0:b74591d5ab33 131
be_bryan 0:b74591d5ab33 132 // For stdio management
be_bryan 0:b74591d5ab33 133 if (obj_s->uart == STDIO_UART) {
be_bryan 0:b74591d5ab33 134 stdio_uart_inited = 1;
be_bryan 0:b74591d5ab33 135 memcpy(&stdio_uart, obj, sizeof(serial_t));
be_bryan 0:b74591d5ab33 136 }
be_bryan 0:b74591d5ab33 137 }
be_bryan 0:b74591d5ab33 138
be_bryan 0:b74591d5ab33 139 void serial_free(serial_t *obj)
be_bryan 0:b74591d5ab33 140 {
be_bryan 0:b74591d5ab33 141 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 142
be_bryan 0:b74591d5ab33 143 // Reset UART and disable clock
be_bryan 0:b74591d5ab33 144 #if defined(USART1_BASE)
be_bryan 0:b74591d5ab33 145 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 146 __HAL_RCC_USART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 147 __HAL_RCC_USART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 148 __HAL_RCC_USART1_CLK_DISABLE();
be_bryan 0:b74591d5ab33 149 }
be_bryan 0:b74591d5ab33 150 #endif
be_bryan 0:b74591d5ab33 151
be_bryan 0:b74591d5ab33 152 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 153 __HAL_RCC_USART2_FORCE_RESET();
be_bryan 0:b74591d5ab33 154 __HAL_RCC_USART2_RELEASE_RESET();
be_bryan 0:b74591d5ab33 155 __HAL_RCC_USART2_CLK_DISABLE();
be_bryan 0:b74591d5ab33 156 }
be_bryan 0:b74591d5ab33 157
be_bryan 0:b74591d5ab33 158 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 159 __HAL_RCC_LPUART1_FORCE_RESET();
be_bryan 0:b74591d5ab33 160 __HAL_RCC_LPUART1_RELEASE_RESET();
be_bryan 0:b74591d5ab33 161 __HAL_RCC_LPUART1_CLK_DISABLE();
be_bryan 0:b74591d5ab33 162 }
be_bryan 0:b74591d5ab33 163
be_bryan 0:b74591d5ab33 164 #if defined(USART4_BASE)
be_bryan 0:b74591d5ab33 165 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 166 __HAL_RCC_USART4_FORCE_RESET();
be_bryan 0:b74591d5ab33 167 __HAL_RCC_USART4_RELEASE_RESET();
be_bryan 0:b74591d5ab33 168 __HAL_RCC_USART4_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(USART5_BASE)
be_bryan 0:b74591d5ab33 173 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 174 __HAL_RCC_USART5_FORCE_RESET();
be_bryan 0:b74591d5ab33 175 __HAL_RCC_USART5_RELEASE_RESET();
be_bryan 0:b74591d5ab33 176 __HAL_RCC_USART5_CLK_DISABLE();
be_bryan 0:b74591d5ab33 177 }
be_bryan 0:b74591d5ab33 178 #endif
be_bryan 0:b74591d5ab33 179
be_bryan 0:b74591d5ab33 180 // Configure GPIOs
be_bryan 0:b74591d5ab33 181 pin_function(obj_s->pin_tx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 182 pin_function(obj_s->pin_rx, STM_PIN_DATA(STM_MODE_INPUT, GPIO_NOPULL, 0));
be_bryan 0:b74591d5ab33 183
be_bryan 0:b74591d5ab33 184 serial_irq_ids[obj_s->index] = 0;
be_bryan 0:b74591d5ab33 185 }
be_bryan 0:b74591d5ab33 186
be_bryan 0:b74591d5ab33 187 void serial_baud(serial_t *obj, int baudrate)
be_bryan 0:b74591d5ab33 188 {
be_bryan 0:b74591d5ab33 189 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 190
be_bryan 0:b74591d5ab33 191 obj_s->baudrate = baudrate;
be_bryan 0:b74591d5ab33 192 init_uart(obj);
be_bryan 0:b74591d5ab33 193 }
be_bryan 0:b74591d5ab33 194
be_bryan 0:b74591d5ab33 195 /******************************************************************************
be_bryan 0:b74591d5ab33 196 * INTERRUPTS HANDLING
be_bryan 0:b74591d5ab33 197 ******************************************************************************/
be_bryan 0:b74591d5ab33 198
be_bryan 0:b74591d5ab33 199 static void uart_irq(int id)
be_bryan 0:b74591d5ab33 200 {
be_bryan 0:b74591d5ab33 201 UART_HandleTypeDef * huart = &uart_handlers[id];
be_bryan 0:b74591d5ab33 202
be_bryan 0:b74591d5ab33 203 if (serial_irq_ids[id] != 0) {
be_bryan 0:b74591d5ab33 204 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TXE) != RESET) {
be_bryan 0:b74591d5ab33 205 if (__HAL_UART_GET_IT(huart, UART_IT_TXE) != RESET) {
be_bryan 0:b74591d5ab33 206 irq_handler(serial_irq_ids[id], TxIrq);
be_bryan 0:b74591d5ab33 207 }
be_bryan 0:b74591d5ab33 208 }
be_bryan 0:b74591d5ab33 209 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 210 if (__HAL_UART_GET_IT(huart, UART_IT_RXNE) != RESET) {
be_bryan 0:b74591d5ab33 211 irq_handler(serial_irq_ids[id], RxIrq);
be_bryan 0:b74591d5ab33 212 /* Flag has been cleared when reading the content */
be_bryan 0:b74591d5ab33 213 }
be_bryan 0:b74591d5ab33 214 }
be_bryan 0:b74591d5ab33 215 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 216 if (__HAL_UART_GET_IT(huart, UART_IT_ORE) != RESET) {
be_bryan 0:b74591d5ab33 217 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
be_bryan 0:b74591d5ab33 218 }
be_bryan 0:b74591d5ab33 219 }
be_bryan 0:b74591d5ab33 220 }
be_bryan 0:b74591d5ab33 221 }
be_bryan 0:b74591d5ab33 222
be_bryan 0:b74591d5ab33 223 #if defined(USART1_BASE)
be_bryan 0:b74591d5ab33 224 static void uart1_irq(void)
be_bryan 0:b74591d5ab33 225 {
be_bryan 0:b74591d5ab33 226 uart_irq(0);
be_bryan 0:b74591d5ab33 227 }
be_bryan 0:b74591d5ab33 228 #endif
be_bryan 0:b74591d5ab33 229
be_bryan 0:b74591d5ab33 230 static void uart2_irq(void)
be_bryan 0:b74591d5ab33 231 {
be_bryan 0:b74591d5ab33 232 uart_irq(1);
be_bryan 0:b74591d5ab33 233 }
be_bryan 0:b74591d5ab33 234
be_bryan 0:b74591d5ab33 235 static void lpuart1_irq(void)
be_bryan 0:b74591d5ab33 236 {
be_bryan 0:b74591d5ab33 237 uart_irq(2);
be_bryan 0:b74591d5ab33 238 }
be_bryan 0:b74591d5ab33 239
be_bryan 0:b74591d5ab33 240 #if defined(USART4_BASE)
be_bryan 0:b74591d5ab33 241 static void uart4_irq(void)
be_bryan 0:b74591d5ab33 242 {
be_bryan 0:b74591d5ab33 243 uart_irq(3);
be_bryan 0:b74591d5ab33 244 }
be_bryan 0:b74591d5ab33 245 #endif
be_bryan 0:b74591d5ab33 246
be_bryan 0:b74591d5ab33 247 #if defined(USART5_BASE)
be_bryan 0:b74591d5ab33 248 static void uart5_irq(void)
be_bryan 0:b74591d5ab33 249 {
be_bryan 0:b74591d5ab33 250 uart_irq(4);
be_bryan 0:b74591d5ab33 251 }
be_bryan 0:b74591d5ab33 252 #endif
be_bryan 0:b74591d5ab33 253
be_bryan 0:b74591d5ab33 254 void serial_irq_handler(serial_t *obj, uart_irq_handler handler, uint32_t id)
be_bryan 0:b74591d5ab33 255 {
be_bryan 0:b74591d5ab33 256 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 257
be_bryan 0:b74591d5ab33 258 irq_handler = handler;
be_bryan 0:b74591d5ab33 259 serial_irq_ids[obj_s->index] = id;
be_bryan 0:b74591d5ab33 260 }
be_bryan 0:b74591d5ab33 261
be_bryan 0:b74591d5ab33 262 void serial_irq_set(serial_t *obj, SerialIrq irq, uint32_t enable)
be_bryan 0:b74591d5ab33 263 {
be_bryan 0:b74591d5ab33 264 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 265 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 266 IRQn_Type irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 267 uint32_t vector = 0;
be_bryan 0:b74591d5ab33 268
be_bryan 0:b74591d5ab33 269 #if defined(USART1_BASE)
be_bryan 0:b74591d5ab33 270 if (obj_s->uart == UART_1) {
be_bryan 0:b74591d5ab33 271 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 272 vector = (uint32_t)&uart1_irq;
be_bryan 0:b74591d5ab33 273 }
be_bryan 0:b74591d5ab33 274 #endif
be_bryan 0:b74591d5ab33 275
be_bryan 0:b74591d5ab33 276 if (obj_s->uart == UART_2) {
be_bryan 0:b74591d5ab33 277 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 278 vector = (uint32_t)&uart2_irq;
be_bryan 0:b74591d5ab33 279 }
be_bryan 0:b74591d5ab33 280
be_bryan 0:b74591d5ab33 281 if (obj_s->uart == LPUART_1) {
be_bryan 0:b74591d5ab33 282 irq_n = RNG_LPUART1_IRQn;
be_bryan 0:b74591d5ab33 283 vector = (uint32_t)&lpuart1_irq;
be_bryan 0:b74591d5ab33 284 }
be_bryan 0:b74591d5ab33 285
be_bryan 0:b74591d5ab33 286 #if defined(USART4_BASE)
be_bryan 0:b74591d5ab33 287 if (obj_s->uart == UART_4) {
be_bryan 0:b74591d5ab33 288 irq_n = USART4_5_IRQn;
be_bryan 0:b74591d5ab33 289 vector = (uint32_t)&uart4_irq;
be_bryan 0:b74591d5ab33 290 }
be_bryan 0:b74591d5ab33 291 #endif
be_bryan 0:b74591d5ab33 292
be_bryan 0:b74591d5ab33 293 #if defined(USART5_BASE)
be_bryan 0:b74591d5ab33 294 if (obj_s->uart == UART_5) {
be_bryan 0:b74591d5ab33 295 irq_n = USART4_5_IRQn;
be_bryan 0:b74591d5ab33 296 vector = (uint32_t)&uart5_irq;
be_bryan 0:b74591d5ab33 297 }
be_bryan 0:b74591d5ab33 298 #endif
be_bryan 0:b74591d5ab33 299
be_bryan 0:b74591d5ab33 300 if (enable) {
be_bryan 0:b74591d5ab33 301 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 302 __HAL_UART_ENABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 303 } else { // TxIrq
be_bryan 0:b74591d5ab33 304 __HAL_UART_ENABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 305 }
be_bryan 0:b74591d5ab33 306 NVIC_SetVector(irq_n, vector);
be_bryan 0:b74591d5ab33 307 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 308
be_bryan 0:b74591d5ab33 309 } else { // disable
be_bryan 0:b74591d5ab33 310 int all_disabled = 0;
be_bryan 0:b74591d5ab33 311 if (irq == RxIrq) {
be_bryan 0:b74591d5ab33 312 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 313 // Check if TxIrq is disabled too
be_bryan 0:b74591d5ab33 314 if ((huart->Instance->CR1 & USART_CR1_TXEIE) == 0) {
be_bryan 0:b74591d5ab33 315 all_disabled = 1;
be_bryan 0:b74591d5ab33 316 }
be_bryan 0:b74591d5ab33 317 } else { // TxIrq
be_bryan 0:b74591d5ab33 318 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 319 // Check if RxIrq is disabled too
be_bryan 0:b74591d5ab33 320 if ((huart->Instance->CR1 & USART_CR1_RXNEIE) == 0) {
be_bryan 0:b74591d5ab33 321 all_disabled = 1;
be_bryan 0:b74591d5ab33 322 }
be_bryan 0:b74591d5ab33 323 }
be_bryan 0:b74591d5ab33 324
be_bryan 0:b74591d5ab33 325 if (all_disabled) {
be_bryan 0:b74591d5ab33 326 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 327 }
be_bryan 0:b74591d5ab33 328 }
be_bryan 0:b74591d5ab33 329 }
be_bryan 0:b74591d5ab33 330
be_bryan 0:b74591d5ab33 331 /******************************************************************************
be_bryan 0:b74591d5ab33 332 * READ/WRITE
be_bryan 0:b74591d5ab33 333 ******************************************************************************/
be_bryan 0:b74591d5ab33 334
be_bryan 0:b74591d5ab33 335 int serial_getc(serial_t *obj)
be_bryan 0:b74591d5ab33 336 {
be_bryan 0:b74591d5ab33 337 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 338 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 339
be_bryan 0:b74591d5ab33 340 while (!serial_readable(obj));
be_bryan 0:b74591d5ab33 341 return (int)(huart->Instance->RDR & (uint16_t)0xFF);
be_bryan 0:b74591d5ab33 342 }
be_bryan 0:b74591d5ab33 343
be_bryan 0:b74591d5ab33 344 void serial_putc(serial_t *obj, int c)
be_bryan 0:b74591d5ab33 345 {
be_bryan 0:b74591d5ab33 346 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 347 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 348
be_bryan 0:b74591d5ab33 349 while (!serial_writable(obj));
be_bryan 0:b74591d5ab33 350 huart->Instance->TDR = (uint32_t)(c & (uint16_t)0xFF);
be_bryan 0:b74591d5ab33 351 }
be_bryan 0:b74591d5ab33 352
be_bryan 0:b74591d5ab33 353 void serial_clear(serial_t *obj)
be_bryan 0:b74591d5ab33 354 {
be_bryan 0:b74591d5ab33 355 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 356 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 357
be_bryan 0:b74591d5ab33 358 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 359 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 360 }
be_bryan 0:b74591d5ab33 361
be_bryan 0:b74591d5ab33 362 void serial_break_set(serial_t *obj)
be_bryan 0:b74591d5ab33 363 {
be_bryan 0:b74591d5ab33 364 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 365 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 366
be_bryan 0:b74591d5ab33 367 __HAL_UART_SEND_REQ(huart, UART_SENDBREAK_REQUEST);
be_bryan 0:b74591d5ab33 368 }
be_bryan 0:b74591d5ab33 369
be_bryan 0:b74591d5ab33 370 #if DEVICE_SERIAL_ASYNCH
be_bryan 0:b74591d5ab33 371
be_bryan 0:b74591d5ab33 372 /******************************************************************************
be_bryan 0:b74591d5ab33 373 * LOCAL HELPER FUNCTIONS
be_bryan 0:b74591d5ab33 374 ******************************************************************************/
be_bryan 0:b74591d5ab33 375
be_bryan 0:b74591d5ab33 376 /**
be_bryan 0:b74591d5ab33 377 * Configure the TX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 378 *
be_bryan 0:b74591d5ab33 379 * @param obj The serial object.
be_bryan 0:b74591d5ab33 380 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 381 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 382 */
be_bryan 0:b74591d5ab33 383 static void serial_tx_buffer_set(serial_t *obj, void *tx, int tx_length, uint8_t width)
be_bryan 0:b74591d5ab33 384 {
be_bryan 0:b74591d5ab33 385 (void)width;
be_bryan 0:b74591d5ab33 386
be_bryan 0:b74591d5ab33 387 // Exit if a transmit is already on-going
be_bryan 0:b74591d5ab33 388 if (serial_tx_active(obj)) {
be_bryan 0:b74591d5ab33 389 return;
be_bryan 0:b74591d5ab33 390 }
be_bryan 0:b74591d5ab33 391
be_bryan 0:b74591d5ab33 392 obj->tx_buff.buffer = tx;
be_bryan 0:b74591d5ab33 393 obj->tx_buff.length = tx_length;
be_bryan 0:b74591d5ab33 394 obj->tx_buff.pos = 0;
be_bryan 0:b74591d5ab33 395 }
be_bryan 0:b74591d5ab33 396
be_bryan 0:b74591d5ab33 397 /**
be_bryan 0:b74591d5ab33 398 * Configure the RX buffer for an asynchronous write serial transaction
be_bryan 0:b74591d5ab33 399 *
be_bryan 0:b74591d5ab33 400 * @param obj The serial object.
be_bryan 0:b74591d5ab33 401 * @param tx The buffer for sending.
be_bryan 0:b74591d5ab33 402 * @param tx_length The number of words to transmit.
be_bryan 0:b74591d5ab33 403 */
be_bryan 0:b74591d5ab33 404 static void serial_rx_buffer_set(serial_t *obj, void *rx, int rx_length, uint8_t width)
be_bryan 0:b74591d5ab33 405 {
be_bryan 0:b74591d5ab33 406 (void)width;
be_bryan 0:b74591d5ab33 407
be_bryan 0:b74591d5ab33 408 // Exit if a reception is already on-going
be_bryan 0:b74591d5ab33 409 if (serial_rx_active(obj)) {
be_bryan 0:b74591d5ab33 410 return;
be_bryan 0:b74591d5ab33 411 }
be_bryan 0:b74591d5ab33 412
be_bryan 0:b74591d5ab33 413 obj->rx_buff.buffer = rx;
be_bryan 0:b74591d5ab33 414 obj->rx_buff.length = rx_length;
be_bryan 0:b74591d5ab33 415 obj->rx_buff.pos = 0;
be_bryan 0:b74591d5ab33 416 }
be_bryan 0:b74591d5ab33 417
be_bryan 0:b74591d5ab33 418 /**
be_bryan 0:b74591d5ab33 419 * Configure events
be_bryan 0:b74591d5ab33 420 *
be_bryan 0:b74591d5ab33 421 * @param obj The serial object
be_bryan 0:b74591d5ab33 422 * @param event The logical OR of the events to configure
be_bryan 0:b74591d5ab33 423 * @param enable Set to non-zero to enable events, or zero to disable them
be_bryan 0:b74591d5ab33 424 */
be_bryan 0:b74591d5ab33 425 static void serial_enable_event(serial_t *obj, int event, uint8_t enable)
be_bryan 0:b74591d5ab33 426 {
be_bryan 0:b74591d5ab33 427 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 428
be_bryan 0:b74591d5ab33 429 // Shouldn't have to enable interrupt here, just need to keep track of the requested events.
be_bryan 0:b74591d5ab33 430 if (enable) {
be_bryan 0:b74591d5ab33 431 obj_s->events |= event;
be_bryan 0:b74591d5ab33 432 } else {
be_bryan 0:b74591d5ab33 433 obj_s->events &= ~event;
be_bryan 0:b74591d5ab33 434 }
be_bryan 0:b74591d5ab33 435 }
be_bryan 0:b74591d5ab33 436
be_bryan 0:b74591d5ab33 437
be_bryan 0:b74591d5ab33 438 /**
be_bryan 0:b74591d5ab33 439 * Get index of serial object TX IRQ, relating it to the physical peripheral.
be_bryan 0:b74591d5ab33 440 *
be_bryan 0:b74591d5ab33 441 * @param obj pointer to serial object
be_bryan 0:b74591d5ab33 442 * @return internal NVIC TX IRQ index of U(S)ART peripheral
be_bryan 0:b74591d5ab33 443 */
be_bryan 0:b74591d5ab33 444 static IRQn_Type serial_get_irq_n(serial_t *obj)
be_bryan 0:b74591d5ab33 445 {
be_bryan 0:b74591d5ab33 446 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 447 IRQn_Type irq_n;
be_bryan 0:b74591d5ab33 448
be_bryan 0:b74591d5ab33 449 switch (obj_s->index) {
be_bryan 0:b74591d5ab33 450 #if defined(USART1_BASE)
be_bryan 0:b74591d5ab33 451 case 0:
be_bryan 0:b74591d5ab33 452 irq_n = USART1_IRQn;
be_bryan 0:b74591d5ab33 453 break;
be_bryan 0:b74591d5ab33 454 #endif
be_bryan 0:b74591d5ab33 455 case 1:
be_bryan 0:b74591d5ab33 456 irq_n = USART2_IRQn;
be_bryan 0:b74591d5ab33 457 break;
be_bryan 0:b74591d5ab33 458
be_bryan 0:b74591d5ab33 459 case 2:
be_bryan 0:b74591d5ab33 460 irq_n = RNG_LPUART1_IRQn;
be_bryan 0:b74591d5ab33 461 break;
be_bryan 0:b74591d5ab33 462 #if defined(USART4_BASE)
be_bryan 0:b74591d5ab33 463 case 3:
be_bryan 0:b74591d5ab33 464 irq_n = USART4_5_IRQn;
be_bryan 0:b74591d5ab33 465 break;
be_bryan 0:b74591d5ab33 466 #endif
be_bryan 0:b74591d5ab33 467 #if defined(USART5_BASE)
be_bryan 0:b74591d5ab33 468 case 4:
be_bryan 0:b74591d5ab33 469 irq_n = USART4_5_IRQn;
be_bryan 0:b74591d5ab33 470 break;
be_bryan 0:b74591d5ab33 471 #endif
be_bryan 0:b74591d5ab33 472 default:
be_bryan 0:b74591d5ab33 473 irq_n = (IRQn_Type)0;
be_bryan 0:b74591d5ab33 474 }
be_bryan 0:b74591d5ab33 475
be_bryan 0:b74591d5ab33 476 return irq_n;
be_bryan 0:b74591d5ab33 477 }
be_bryan 0:b74591d5ab33 478
be_bryan 0:b74591d5ab33 479
be_bryan 0:b74591d5ab33 480 /******************************************************************************
be_bryan 0:b74591d5ab33 481 * MBED API FUNCTIONS
be_bryan 0:b74591d5ab33 482 ******************************************************************************/
be_bryan 0:b74591d5ab33 483
be_bryan 0:b74591d5ab33 484 /**
be_bryan 0:b74591d5ab33 485 * Begin asynchronous TX transfer. The used buffer is specified in the serial
be_bryan 0:b74591d5ab33 486 * object, tx_buff
be_bryan 0:b74591d5ab33 487 *
be_bryan 0:b74591d5ab33 488 * @param obj The serial object
be_bryan 0:b74591d5ab33 489 * @param tx The buffer for sending
be_bryan 0:b74591d5ab33 490 * @param tx_length The number of words to transmit
be_bryan 0:b74591d5ab33 491 * @param tx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 492 * @param handler The serial handler
be_bryan 0:b74591d5ab33 493 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 494 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 495 * @return Returns number of data transfered, or 0 otherwise
be_bryan 0:b74591d5ab33 496 */
be_bryan 0:b74591d5ab33 497 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 498 {
be_bryan 0:b74591d5ab33 499 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 500 (void) hint;
be_bryan 0:b74591d5ab33 501
be_bryan 0:b74591d5ab33 502 // Check buffer is ok
be_bryan 0:b74591d5ab33 503 MBED_ASSERT(tx != (void*)0);
be_bryan 0:b74591d5ab33 504 MBED_ASSERT(tx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 505
be_bryan 0:b74591d5ab33 506 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 507 UART_HandleTypeDef * huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 508
be_bryan 0:b74591d5ab33 509 if (tx_length == 0) {
be_bryan 0:b74591d5ab33 510 return 0;
be_bryan 0:b74591d5ab33 511 }
be_bryan 0:b74591d5ab33 512
be_bryan 0:b74591d5ab33 513 // Set up buffer
be_bryan 0:b74591d5ab33 514 serial_tx_buffer_set(obj, (void *)tx, tx_length, tx_width);
be_bryan 0:b74591d5ab33 515
be_bryan 0:b74591d5ab33 516 // Set up events
be_bryan 0:b74591d5ab33 517 serial_enable_event(obj, SERIAL_EVENT_TX_ALL, 0); // Clear all events
be_bryan 0:b74591d5ab33 518 serial_enable_event(obj, event, 1); // Set only the wanted events
be_bryan 0:b74591d5ab33 519
be_bryan 0:b74591d5ab33 520 // Enable interrupt
be_bryan 0:b74591d5ab33 521 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 522 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 523 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 524 NVIC_SetPriority(irq_n, 1);
be_bryan 0:b74591d5ab33 525 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 526 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 527
be_bryan 0:b74591d5ab33 528 // the following function will enable UART_IT_TXE and error interrupts
be_bryan 0:b74591d5ab33 529 if (HAL_UART_Transmit_IT(huart, (uint8_t*)tx, tx_length) != HAL_OK) {
be_bryan 0:b74591d5ab33 530 return 0;
be_bryan 0:b74591d5ab33 531 }
be_bryan 0:b74591d5ab33 532
be_bryan 0:b74591d5ab33 533 return tx_length;
be_bryan 0:b74591d5ab33 534 }
be_bryan 0:b74591d5ab33 535
be_bryan 0:b74591d5ab33 536 /**
be_bryan 0:b74591d5ab33 537 * Begin asynchronous RX transfer (enable interrupt for data collecting)
be_bryan 0:b74591d5ab33 538 * The used buffer is specified in the serial object, rx_buff
be_bryan 0:b74591d5ab33 539 *
be_bryan 0:b74591d5ab33 540 * @param obj The serial object
be_bryan 0:b74591d5ab33 541 * @param rx The buffer for sending
be_bryan 0:b74591d5ab33 542 * @param rx_length The number of words to transmit
be_bryan 0:b74591d5ab33 543 * @param rx_width The bit width of buffer word
be_bryan 0:b74591d5ab33 544 * @param handler The serial handler
be_bryan 0:b74591d5ab33 545 * @param event The logical OR of events to be registered
be_bryan 0:b74591d5ab33 546 * @param handler The serial handler
be_bryan 0:b74591d5ab33 547 * @param char_match A character in range 0-254 to be matched
be_bryan 0:b74591d5ab33 548 * @param hint A suggestion for how to use DMA with this transfer
be_bryan 0:b74591d5ab33 549 */
be_bryan 0:b74591d5ab33 550 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 551 {
be_bryan 0:b74591d5ab33 552 // TODO: DMA usage is currently ignored
be_bryan 0:b74591d5ab33 553 (void) hint;
be_bryan 0:b74591d5ab33 554
be_bryan 0:b74591d5ab33 555 /* Sanity check arguments */
be_bryan 0:b74591d5ab33 556 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 557 MBED_ASSERT(rx != (void*)0);
be_bryan 0:b74591d5ab33 558 MBED_ASSERT(rx_width == 8); // support only 8b width
be_bryan 0:b74591d5ab33 559
be_bryan 0:b74591d5ab33 560 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 561 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 562
be_bryan 0:b74591d5ab33 563 serial_enable_event(obj, SERIAL_EVENT_RX_ALL, 0);
be_bryan 0:b74591d5ab33 564 serial_enable_event(obj, event, 1);
be_bryan 0:b74591d5ab33 565
be_bryan 0:b74591d5ab33 566 // set CharMatch
be_bryan 0:b74591d5ab33 567 obj->char_match = char_match;
be_bryan 0:b74591d5ab33 568
be_bryan 0:b74591d5ab33 569 serial_rx_buffer_set(obj, rx, rx_length, rx_width);
be_bryan 0:b74591d5ab33 570
be_bryan 0:b74591d5ab33 571 IRQn_Type irq_n = serial_get_irq_n(obj);
be_bryan 0:b74591d5ab33 572 NVIC_ClearPendingIRQ(irq_n);
be_bryan 0:b74591d5ab33 573 NVIC_DisableIRQ(irq_n);
be_bryan 0:b74591d5ab33 574 NVIC_SetPriority(irq_n, 0);
be_bryan 0:b74591d5ab33 575 NVIC_SetVector(irq_n, (uint32_t)handler);
be_bryan 0:b74591d5ab33 576 NVIC_EnableIRQ(irq_n);
be_bryan 0:b74591d5ab33 577
be_bryan 0:b74591d5ab33 578 // following HAL function will enable the RXNE interrupt + error interrupts
be_bryan 0:b74591d5ab33 579 HAL_UART_Receive_IT(huart, (uint8_t*)rx, rx_length);
be_bryan 0:b74591d5ab33 580 }
be_bryan 0:b74591d5ab33 581
be_bryan 0:b74591d5ab33 582 /**
be_bryan 0:b74591d5ab33 583 * Attempts to determine if the serial peripheral is already in use for TX
be_bryan 0:b74591d5ab33 584 *
be_bryan 0:b74591d5ab33 585 * @param obj The serial object
be_bryan 0:b74591d5ab33 586 * @return Non-zero if the TX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 587 */
be_bryan 0:b74591d5ab33 588 uint8_t serial_tx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 589 {
be_bryan 0:b74591d5ab33 590 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 591
be_bryan 0:b74591d5ab33 592 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 593 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 594
be_bryan 0:b74591d5ab33 595 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_TX) ? 1 : 0);
be_bryan 0:b74591d5ab33 596 }
be_bryan 0:b74591d5ab33 597
be_bryan 0:b74591d5ab33 598 /**
be_bryan 0:b74591d5ab33 599 * Attempts to determine if the serial peripheral is already in use for RX
be_bryan 0:b74591d5ab33 600 *
be_bryan 0:b74591d5ab33 601 * @param obj The serial object
be_bryan 0:b74591d5ab33 602 * @return Non-zero if the RX transaction is ongoing, 0 otherwise
be_bryan 0:b74591d5ab33 603 */
be_bryan 0:b74591d5ab33 604 uint8_t serial_rx_active(serial_t *obj)
be_bryan 0:b74591d5ab33 605 {
be_bryan 0:b74591d5ab33 606 MBED_ASSERT(obj);
be_bryan 0:b74591d5ab33 607
be_bryan 0:b74591d5ab33 608 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 609 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 610
be_bryan 0:b74591d5ab33 611 return ((HAL_UART_GetState(huart) == HAL_UART_STATE_BUSY_RX) ? 1 : 0);
be_bryan 0:b74591d5ab33 612 }
be_bryan 0:b74591d5ab33 613
be_bryan 0:b74591d5ab33 614 void HAL_UART_TxCpltCallback(UART_HandleTypeDef *huart) {
be_bryan 0:b74591d5ab33 615 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 616 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
be_bryan 0:b74591d5ab33 617 }
be_bryan 0:b74591d5ab33 618 }
be_bryan 0:b74591d5ab33 619
be_bryan 0:b74591d5ab33 620 /**
be_bryan 0:b74591d5ab33 621 * The asynchronous TX and RX handler.
be_bryan 0:b74591d5ab33 622 *
be_bryan 0:b74591d5ab33 623 * @param obj The serial object
be_bryan 0:b74591d5ab33 624 * @return Returns event flags if a TX/RX transfer termination condition was met or 0 otherwise
be_bryan 0:b74591d5ab33 625 */
be_bryan 0:b74591d5ab33 626 int serial_irq_handler_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 627 {
be_bryan 0:b74591d5ab33 628 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 629 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 630
be_bryan 0:b74591d5ab33 631 volatile int return_event = 0;
be_bryan 0:b74591d5ab33 632 uint8_t *buf = (uint8_t*)(obj->rx_buff.buffer);
be_bryan 0:b74591d5ab33 633 uint8_t i = 0;
be_bryan 0:b74591d5ab33 634
be_bryan 0:b74591d5ab33 635 // TX PART:
be_bryan 0:b74591d5ab33 636 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_TC) != RESET) {
be_bryan 0:b74591d5ab33 637 if (__HAL_UART_GET_IT_SOURCE(huart, UART_IT_TC) != RESET) {
be_bryan 0:b74591d5ab33 638 // Return event SERIAL_EVENT_TX_COMPLETE if requested
be_bryan 0:b74591d5ab33 639 if ((obj_s->events & SERIAL_EVENT_TX_COMPLETE ) != 0) {
be_bryan 0:b74591d5ab33 640 return_event |= (SERIAL_EVENT_TX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 641 }
be_bryan 0:b74591d5ab33 642 }
be_bryan 0:b74591d5ab33 643 }
be_bryan 0:b74591d5ab33 644
be_bryan 0:b74591d5ab33 645 // Handle error events
be_bryan 0:b74591d5ab33 646 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_PE) != RESET) {
be_bryan 0:b74591d5ab33 647 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF);
be_bryan 0:b74591d5ab33 648 if (__HAL_UART_GET_IT(huart, USART_IT_ERR) != RESET) {
be_bryan 0:b74591d5ab33 649 return_event |= (SERIAL_EVENT_RX_PARITY_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 650 }
be_bryan 0:b74591d5ab33 651 }
be_bryan 0:b74591d5ab33 652
be_bryan 0:b74591d5ab33 653 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_FE) != RESET) {
be_bryan 0:b74591d5ab33 654 if (__HAL_UART_GET_IT(huart, UART_IT_FE) != RESET) {
be_bryan 0:b74591d5ab33 655 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_FEF);
be_bryan 0:b74591d5ab33 656 return_event |= (SERIAL_EVENT_RX_FRAMING_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 657 }
be_bryan 0:b74591d5ab33 658 }
be_bryan 0:b74591d5ab33 659
be_bryan 0:b74591d5ab33 660 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_NE) != RESET) {
be_bryan 0:b74591d5ab33 661 if (__HAL_UART_GET_IT(huart, UART_IT_NE) != RESET) {
be_bryan 0:b74591d5ab33 662 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_NEF);
be_bryan 0:b74591d5ab33 663 }
be_bryan 0:b74591d5ab33 664 }
be_bryan 0:b74591d5ab33 665
be_bryan 0:b74591d5ab33 666 if (__HAL_UART_GET_FLAG(huart, UART_FLAG_ORE) != RESET) {
be_bryan 0:b74591d5ab33 667 if (__HAL_UART_GET_IT(huart, UART_IT_ORE) != RESET) {
be_bryan 0:b74591d5ab33 668 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_OREF);
be_bryan 0:b74591d5ab33 669 return_event |= (SERIAL_EVENT_RX_OVERRUN_ERROR & obj_s->events);
be_bryan 0:b74591d5ab33 670 }
be_bryan 0:b74591d5ab33 671 }
be_bryan 0:b74591d5ab33 672
be_bryan 0:b74591d5ab33 673 HAL_UART_IRQHandler(huart);
be_bryan 0:b74591d5ab33 674
be_bryan 0:b74591d5ab33 675 // Abort if an error occurs
be_bryan 0:b74591d5ab33 676 if ((return_event & SERIAL_EVENT_RX_PARITY_ERROR) ||
be_bryan 0:b74591d5ab33 677 (return_event & SERIAL_EVENT_RX_FRAMING_ERROR) ||
be_bryan 0:b74591d5ab33 678 (return_event & SERIAL_EVENT_RX_OVERRUN_ERROR)) {
be_bryan 0:b74591d5ab33 679 return return_event;
be_bryan 0:b74591d5ab33 680 }
be_bryan 0:b74591d5ab33 681
be_bryan 0:b74591d5ab33 682 //RX PART
be_bryan 0:b74591d5ab33 683 if (huart->RxXferSize != 0) {
be_bryan 0:b74591d5ab33 684 obj->rx_buff.pos = huart->RxXferSize - huart->RxXferCount;
be_bryan 0:b74591d5ab33 685 }
be_bryan 0:b74591d5ab33 686 if ((huart->RxXferCount == 0) && (obj->rx_buff.pos >= (obj->rx_buff.length - 1))) {
be_bryan 0:b74591d5ab33 687 return_event |= (SERIAL_EVENT_RX_COMPLETE & obj_s->events);
be_bryan 0:b74591d5ab33 688 }
be_bryan 0:b74591d5ab33 689
be_bryan 0:b74591d5ab33 690 // Check if char_match is present
be_bryan 0:b74591d5ab33 691 if (obj_s->events & SERIAL_EVENT_RX_CHARACTER_MATCH) {
be_bryan 0:b74591d5ab33 692 if (buf != NULL) {
be_bryan 0:b74591d5ab33 693 for (i = 0; i < obj->rx_buff.pos; i++) {
be_bryan 0:b74591d5ab33 694 if (buf[i] == obj->char_match) {
be_bryan 0:b74591d5ab33 695 obj->rx_buff.pos = i;
be_bryan 0:b74591d5ab33 696 return_event |= (SERIAL_EVENT_RX_CHARACTER_MATCH & obj_s->events);
be_bryan 0:b74591d5ab33 697 serial_rx_abort_asynch(obj);
be_bryan 0:b74591d5ab33 698 break;
be_bryan 0:b74591d5ab33 699 }
be_bryan 0:b74591d5ab33 700 }
be_bryan 0:b74591d5ab33 701 }
be_bryan 0:b74591d5ab33 702 }
be_bryan 0:b74591d5ab33 703
be_bryan 0:b74591d5ab33 704 return return_event;
be_bryan 0:b74591d5ab33 705 }
be_bryan 0:b74591d5ab33 706
be_bryan 0:b74591d5ab33 707 /**
be_bryan 0:b74591d5ab33 708 * Abort the ongoing TX transaction. It disables the enabled interupt for TX and
be_bryan 0:b74591d5ab33 709 * flush TX hardware buffer if TX FIFO is used
be_bryan 0:b74591d5ab33 710 *
be_bryan 0:b74591d5ab33 711 * @param obj The serial object
be_bryan 0:b74591d5ab33 712 */
be_bryan 0:b74591d5ab33 713 void serial_tx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 714 {
be_bryan 0:b74591d5ab33 715 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 716 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 717
be_bryan 0:b74591d5ab33 718 __HAL_UART_DISABLE_IT(huart, UART_IT_TC);
be_bryan 0:b74591d5ab33 719 __HAL_UART_DISABLE_IT(huart, UART_IT_TXE);
be_bryan 0:b74591d5ab33 720
be_bryan 0:b74591d5ab33 721 // clear flags
be_bryan 0:b74591d5ab33 722 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_TCF);
be_bryan 0:b74591d5ab33 723
be_bryan 0:b74591d5ab33 724 // reset states
be_bryan 0:b74591d5ab33 725 huart->TxXferCount = 0;
be_bryan 0:b74591d5ab33 726 // update handle state
be_bryan 0:b74591d5ab33 727 if(huart->gState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 728 huart->gState = HAL_UART_STATE_BUSY_RX;
be_bryan 0:b74591d5ab33 729 } else {
be_bryan 0:b74591d5ab33 730 huart->gState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 731 }
be_bryan 0:b74591d5ab33 732 }
be_bryan 0:b74591d5ab33 733
be_bryan 0:b74591d5ab33 734 /**
be_bryan 0:b74591d5ab33 735 * Abort the ongoing RX transaction It disables the enabled interrupt for RX and
be_bryan 0:b74591d5ab33 736 * flush RX hardware buffer if RX FIFO is used
be_bryan 0:b74591d5ab33 737 *
be_bryan 0:b74591d5ab33 738 * @param obj The serial object
be_bryan 0:b74591d5ab33 739 */
be_bryan 0:b74591d5ab33 740 void serial_rx_abort_asynch(serial_t *obj)
be_bryan 0:b74591d5ab33 741 {
be_bryan 0:b74591d5ab33 742 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 743 UART_HandleTypeDef *huart = &uart_handlers[obj_s->index];
be_bryan 0:b74591d5ab33 744
be_bryan 0:b74591d5ab33 745 // disable interrupts
be_bryan 0:b74591d5ab33 746 __HAL_UART_DISABLE_IT(huart, UART_IT_RXNE);
be_bryan 0:b74591d5ab33 747 __HAL_UART_DISABLE_IT(huart, UART_IT_PE);
be_bryan 0:b74591d5ab33 748 __HAL_UART_DISABLE_IT(huart, UART_IT_ERR);
be_bryan 0:b74591d5ab33 749
be_bryan 0:b74591d5ab33 750 // clear flags
be_bryan 0:b74591d5ab33 751 __HAL_UART_CLEAR_FLAG(huart, UART_CLEAR_PEF | UART_CLEAR_FEF | UART_CLEAR_OREF);
be_bryan 0:b74591d5ab33 752 volatile uint32_t tmpval __attribute__((unused)) = huart->Instance->RDR; // Clear RXNE flag
be_bryan 0:b74591d5ab33 753
be_bryan 0:b74591d5ab33 754 // reset states
be_bryan 0:b74591d5ab33 755 huart->RxXferCount = 0;
be_bryan 0:b74591d5ab33 756 // update handle state
be_bryan 0:b74591d5ab33 757 if(huart->RxState == HAL_UART_STATE_BUSY_TX_RX) {
be_bryan 0:b74591d5ab33 758 huart->RxState = HAL_UART_STATE_BUSY_TX;
be_bryan 0:b74591d5ab33 759 } else {
be_bryan 0:b74591d5ab33 760 huart->RxState = HAL_UART_STATE_READY;
be_bryan 0:b74591d5ab33 761 }
be_bryan 0:b74591d5ab33 762 }
be_bryan 0:b74591d5ab33 763
be_bryan 0:b74591d5ab33 764 #endif
be_bryan 0:b74591d5ab33 765
be_bryan 0:b74591d5ab33 766 #if DEVICE_SERIAL_FC
be_bryan 0:b74591d5ab33 767
be_bryan 0:b74591d5ab33 768 /**
be_bryan 0:b74591d5ab33 769 * Set HW Control Flow
be_bryan 0:b74591d5ab33 770 * @param obj The serial object
be_bryan 0:b74591d5ab33 771 * @param type The Control Flow type (FlowControlNone, FlowControlRTS, FlowControlCTS, FlowControlRTSCTS)
be_bryan 0:b74591d5ab33 772 * @param rxflow Pin for the rxflow
be_bryan 0:b74591d5ab33 773 * @param txflow Pin for the txflow
be_bryan 0:b74591d5ab33 774 */
be_bryan 0:b74591d5ab33 775 void serial_set_flow_control(serial_t *obj, FlowControl type, PinName rxflow, PinName txflow)
be_bryan 0:b74591d5ab33 776 {
be_bryan 0:b74591d5ab33 777 struct serial_s *obj_s = SERIAL_S(obj);
be_bryan 0:b74591d5ab33 778
be_bryan 0:b74591d5ab33 779 // Determine the UART to use (UART_1, UART_2, ...)
be_bryan 0:b74591d5ab33 780 UARTName uart_rts = (UARTName)pinmap_peripheral(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 781 UARTName uart_cts = (UARTName)pinmap_peripheral(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 782
be_bryan 0:b74591d5ab33 783 // Get the peripheral name (UART_1, UART_2, ...) from the pin and assign it to the object
be_bryan 0:b74591d5ab33 784 obj_s->uart = (UARTName)pinmap_merge(uart_cts, uart_rts);
be_bryan 0:b74591d5ab33 785 MBED_ASSERT(obj_s->uart != (UARTName)NC);
be_bryan 0:b74591d5ab33 786
be_bryan 0:b74591d5ab33 787 if(type == FlowControlNone) {
be_bryan 0:b74591d5ab33 788 // Disable hardware flow control
be_bryan 0:b74591d5ab33 789 obj_s->hw_flow_ctl = UART_HWCONTROL_NONE;
be_bryan 0:b74591d5ab33 790 }
be_bryan 0:b74591d5ab33 791 if (type == FlowControlRTS) {
be_bryan 0:b74591d5ab33 792 // Enable RTS
be_bryan 0:b74591d5ab33 793 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 794 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS;
be_bryan 0:b74591d5ab33 795 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 796 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 797 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 798 }
be_bryan 0:b74591d5ab33 799 if (type == FlowControlCTS) {
be_bryan 0:b74591d5ab33 800 // Enable CTS
be_bryan 0:b74591d5ab33 801 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 802 obj_s->hw_flow_ctl = UART_HWCONTROL_CTS;
be_bryan 0:b74591d5ab33 803 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 804 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 805 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 806 }
be_bryan 0:b74591d5ab33 807 if (type == FlowControlRTSCTS) {
be_bryan 0:b74591d5ab33 808 // Enable CTS & RTS
be_bryan 0:b74591d5ab33 809 MBED_ASSERT(uart_rts != (UARTName)NC);
be_bryan 0:b74591d5ab33 810 MBED_ASSERT(uart_cts != (UARTName)NC);
be_bryan 0:b74591d5ab33 811 obj_s->hw_flow_ctl = UART_HWCONTROL_RTS_CTS;
be_bryan 0:b74591d5ab33 812 obj_s->pin_rts = rxflow;
be_bryan 0:b74591d5ab33 813 obj_s->pin_cts = txflow;
be_bryan 0:b74591d5ab33 814 // Enable the pin for CTS function
be_bryan 0:b74591d5ab33 815 pinmap_pinout(txflow, PinMap_UART_CTS);
be_bryan 0:b74591d5ab33 816 // Enable the pin for RTS function
be_bryan 0:b74591d5ab33 817 pinmap_pinout(rxflow, PinMap_UART_RTS);
be_bryan 0:b74591d5ab33 818 }
be_bryan 0:b74591d5ab33 819
be_bryan 0:b74591d5ab33 820 init_uart(obj);
be_bryan 0:b74591d5ab33 821 }
be_bryan 0:b74591d5ab33 822
be_bryan 0:b74591d5ab33 823 #endif
be_bryan 0:b74591d5ab33 824
be_bryan 0:b74591d5ab33 825 #endif