161 lines
3.7 KiB
C
161 lines
3.7 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include "ch.h"
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#include "hal.h"
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static virtual_timer_t vt3, vt4, vt5;
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static const uint8_t message[] = "0123456789ABCDEF";
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static uint8_t buffer[16];
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static void led3off(void *p) {
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(void)p;
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palClearPad(GPIOD, GPIOD_LED3);
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}
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static void led4off(void *p) {
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(void)p;
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palClearPad(GPIOD, GPIOD_LED4);
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}
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static void led5off(void *p) {
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(void)p;
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palClearPad(GPIOD, GPIOD_LED5);
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}
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/*
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* This callback is invoked when a transmission buffer has been completely
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* read by the driver.
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*/
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static void txend1(UARTDriver *uartp) {
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(void)uartp;
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}
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/*
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* This callback is invoked when a transmission has physically completed.
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*/
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static void txend2(UARTDriver *uartp) {
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(void)uartp;
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palSetPad(GPIOD, GPIOD_LED5);
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chSysLockFromISR();
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chVTResetI(&vt5);
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chVTSetI(&vt5, MS2ST(200), led5off, NULL);
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chSysUnlockFromISR();
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}
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/*
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* This callback is invoked on a receive error, the errors mask is passed
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* as parameter.
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*/
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static void rxerr(UARTDriver *uartp, uartflags_t e) {
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(void)uartp;
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(void)e;
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}
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/*
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* This callback is invoked when a character is received but the application
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* was not ready to receive it, the character is passed as parameter.
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*/
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static void rxchar(UARTDriver *uartp, uint16_t c) {
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(void)uartp;
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(void)c;
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/* Flashing the LED each time a character is received.*/
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palSetPad(GPIOD, GPIOD_LED4);
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chSysLockFromISR();
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chVTResetI(&vt4);
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chVTSetI(&vt4, MS2ST(200), led4off, NULL);
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chSysUnlockFromISR();
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}
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/*
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* This callback is invoked when a receive buffer has been completely written.
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*/
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static void rxend(UARTDriver *uartp) {
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(void)uartp;
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/* Flashing the LED each time a character is received.*/
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palSetPad(GPIOD, GPIOD_LED3);
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chSysLockFromISR();
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chVTResetI(&vt3);
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chVTSetI(&vt3, MS2ST(200), led3off, NULL);
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chSysUnlockFromISR();
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}
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/*
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* UART driver configuration structure.
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*/
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static UARTConfig uart_cfg_1 = {
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txend1,
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txend2,
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rxend,
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rxchar,
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rxerr,
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38400,
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0,
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USART_CR2_LINEN,
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0
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};
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/*
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* Application entry point.
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*/
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int main(void) {
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/*
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* System initializations.
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* - HAL initialization, this also initializes the configured device drivers
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* and performs the board-specific initializations.
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* - Kernel initialization, the main() function becomes a thread and the
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* RTOS is active.
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*/
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halInit();
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chSysInit();
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/*
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* Activates the UART driver 2, PA2(TX) and PA3(RX) are routed to USART2.
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*/
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uartStart(&UARTD2, &uart_cfg_1);
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palSetPadMode(GPIOA, 2, PAL_MODE_ALTERNATE(7));
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palSetPadMode(GPIOA, 3, PAL_MODE_ALTERNATE(7));
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/*
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* Normal main() thread activity, in this demo it does nothing.
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*/
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while (TRUE) {
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if (palReadPad(GPIOA, GPIOA_BUTTON)) {
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/*
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* Starts both a transmission and a receive operations, both will be
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* handled entirely in background.
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*/
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uartStopReceive(&UARTD2);
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uartStopSend(&UARTD2);
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uartStartReceive(&UARTD2, 16, buffer);
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uartStartSend(&UARTD2, 16, message);
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}
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chThdSleepMilliseconds(500);
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}
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}
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