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/*
ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
2011,2012,2013 Giovanni Di Sirio.
This file is part of ChibiOS/RT.
ChibiOS/RT is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
ChibiOS/RT is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "ch.h"
#include "hal.h"
static void pwm2pcb(PWMDriver *pwmp) {
(void)pwmp;
palSetPad(GPIO1, GPIO1_LED2);
}
static void pwm2c0cb(PWMDriver *pwmp) {
(void)pwmp;
palClearPad(GPIO1, GPIO1_LED2);
}
static PWMConfig pwmcfg = {
10000, /* 100kHz PWM clock frequency. */
1000, /* PWM 10 Hz */
pwm2pcb,
{
{PWM_OUTPUT_ACTIVE_LOW, pwm2c0cb},
{PWM_OUTPUT_ACTIVE_LOW, NULL}
}
};
/*
* Application entry point.
*/
int main(void) {
/*
* System initializations.
* - HAL initialization, this also initializes the configured device drivers
* and performs the board-specific initializations.
* - Kernel initialization, the main() function becomes a thread and the
* RTOS is active.
*/
halInit();
chSysInit();
/*
* Initializes the PWM driver 2.
*/
pwmStart(&PWMD2, &pwmcfg);
chThdSleepMilliseconds(2000);
/*
* Starts the PWM channel 1 using 75% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, 250);
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 1 to 50% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, 500);
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 75% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, 250);
chThdSleepMilliseconds(5000);
/*
* Changes PWM period to half second the duty cycle becomes 50%
* implicitly.
*/
pwmChangePeriod(&PWMD2, 500);
chThdSleepMilliseconds(5000);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (TRUE) {
chThdSleepMilliseconds(500);
}
return 0;
}
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