144 lines
3.5 KiB
C
144 lines
3.5 KiB
C
/*
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ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010,
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2011,2012,2013 Giovanni Di Sirio.
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This file is part of ChibiOS/RT.
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ChibiOS/RT is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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ChibiOS/RT is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "ch.h"
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#include "hal.h"
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static void pwmpcb(PWMDriver *pwmp) {
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(void)pwmp;
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palSetPad(IOPORT3, GPIOC_LED);
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}
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static void pwmc1cb(PWMDriver *pwmp) {
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(void)pwmp;
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palClearPad(IOPORT3, GPIOC_LED);
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}
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static PWMConfig pwmcfg = {
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10000, /* 10kHz PWM clock frequency. */
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10000, /* Initial PWM period 1S. */
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pwmpcb,
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{
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{PWM_OUTPUT_ACTIVE_HIGH, pwmc1cb},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL},
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{PWM_OUTPUT_DISABLED, NULL}
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},
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0,
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#if STM32_PWM_USE_ADVANCED
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0
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#endif
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};
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icucnt_t last_width, last_period;
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static void icuwidthcb(ICUDriver *icup) {
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last_width = icuGetWidth(icup);
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}
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static void icuperiodcb(ICUDriver *icup) {
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last_period = icuGetPeriod(icup);
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}
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static ICUConfig icucfg = {
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ICU_INPUT_ACTIVE_HIGH,
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10000, /* 10kHz ICU clock frequency. */
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icuwidthcb,
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icuperiodcb,
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NULL,
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ICU_CHANNEL_1
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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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* LED initially off.
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*/
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palSetPad(IOPORT3, GPIOC_LED);
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/*
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* Initializes the PWM driver 1 and ICU driver 4.
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*/
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pwmStart(&PWMD1, &pwmcfg);
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palSetPadMode(IOPORT1, 8, PAL_MODE_STM32_ALTERNATE_PUSHPULL);
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icuStart(&ICUD4, &icucfg);
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icuEnable(&ICUD4);
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chThdSleepMilliseconds(2000);
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/*
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* Starts the PWM channel 0 using 75% duty cycle.
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*/
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pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 7500));
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chThdSleepMilliseconds(5000);
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/*
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* Changes the PWM channel 0 to 50% duty cycle.
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*/
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pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 5000));
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chThdSleepMilliseconds(5000);
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/*
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* Changes the PWM channel 0 to 25% duty cycle.
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*/
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pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 2500));
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chThdSleepMilliseconds(5000);
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/*
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* Changes PWM period to half second the duty cycle becomes 50%
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* implicitly.
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*/
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pwmChangePeriod(&PWMD1, 5000);
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chThdSleepMilliseconds(5000);
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/*
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* Disables channel 0 and stops the drivers.
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*/
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pwmDisableChannel(&PWMD1, 0);
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pwmStop(&PWMD1);
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icuDisable(&ICUD4);
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icuStop(&ICUD4);
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palSetPad(IOPORT3, GPIOC_LED);
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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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chThdSleepMilliseconds(500);
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}
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return 0;
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}
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