125 lines
2.5 KiB
C
125 lines
2.5 KiB
C
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/*
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Copyright (C) 2015 Stephen Caudle
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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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/*
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* GPT callback for GPTD2.
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*/
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static void gptcallback1(GPTDriver *gptp) {
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(void)gptp;
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palTogglePad(IOPORT1, LED1);
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/*
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* Start a one-shot timer (@ 250ms)
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*/
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chSysLockFromISR();
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gptStartOneShotI(&GPTD3, 15625);
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chSysUnlockFromISR();
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}
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/*
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* GPT callback for GPTD3.
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*/
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static void gptcallback2(GPTDriver *gptp) {
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(void)gptp;
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palTogglePad(IOPORT1, LED2);
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}
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/*
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* GPT configuration
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* Frequency: 31250Hz (32us period)
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* Resolution: 16 bits
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*/
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static const GPTConfig gptcfg1 = {
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31250,
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gptcallback1,
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16,
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};
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/*
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* GPT configuration
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* Frequency: 62500Hz (16us period)
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* Resolution: 16 bits
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*/
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static const GPTConfig gptcfg2 = {
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62500,
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gptcallback2,
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16,
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};
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/*
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* LED blinker thread, times are in milliseconds.
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*/
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static THD_WORKING_AREA(waThread1, 128);
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static THD_FUNCTION(Thread1, arg) {
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(void)arg;
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chRegSetThreadName("blinker");
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while (true) {
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palTogglePad(IOPORT1, LED0);
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chThdSleepMilliseconds(500);
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}
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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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* Creates the blinker thread.
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*/
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chThdCreateStatic(waThread1, sizeof(waThread1), NORMALPRIO, Thread1, NULL);
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/*
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* Sets up the GPT timers
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*/
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gptStart(&GPTD2, &gptcfg1);
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gptStart(&GPTD3, &gptcfg2);
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/*
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* Start a continuous timer
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*/
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gptStartContinuous(&GPTD2, 15625);
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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(IOPORT1, KEY1) == 0) {
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gptStopTimer(&GPTD2);
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gptStop(&GPTD2);
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gptStopTimer(&GPTD3);
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gptStop(&GPTD3);
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}
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chThdSleepMilliseconds(500);
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}
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}
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