139 lines
3.3 KiB
C
139 lines
3.3 KiB
C
/*
|
|
ChibiOS/RT - Copyright (C) 2006-2013 Giovanni Di Sirio
|
|
|
|
Licensed under the Apache License, Version 2.0 (the "License");
|
|
you may not use this file except in compliance with the License.
|
|
You may obtain a copy of the License at
|
|
|
|
http://www.apache.org/licenses/LICENSE-2.0
|
|
|
|
Unless required by applicable law or agreed to in writing, software
|
|
distributed under the License is distributed on an "AS IS" BASIS,
|
|
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
See the License for the specific language governing permissions and
|
|
limitations under the License.
|
|
*/
|
|
|
|
#include "ch.h"
|
|
#include "hal.h"
|
|
|
|
static void pwmpcb(PWMDriver *pwmp) {
|
|
|
|
(void)pwmp;
|
|
palClearPad(GPIOC, GPIOC_LED1);
|
|
}
|
|
|
|
static void pwmc1cb(PWMDriver *pwmp) {
|
|
|
|
(void)pwmp;
|
|
palSetPad(GPIOC, GPIOC_LED1);
|
|
}
|
|
|
|
static PWMConfig pwmcfg = {
|
|
10000, /* 10kHz PWM clock frequency. */
|
|
10000, /* Initial PWM period 1S. */
|
|
pwmpcb,
|
|
{
|
|
{PWM_OUTPUT_ACTIVE_LOW, pwmc1cb},
|
|
{PWM_OUTPUT_DISABLED, NULL},
|
|
{PWM_OUTPUT_DISABLED, NULL},
|
|
{PWM_OUTPUT_DISABLED, NULL}
|
|
},
|
|
0,
|
|
0
|
|
};
|
|
|
|
icucnt_t last_width, last_period;
|
|
|
|
static void icuwidthcb(ICUDriver *icup) {
|
|
|
|
palSetPad(GPIOC, GPIOC_LED2);
|
|
last_width = icuGetWidth(icup);
|
|
}
|
|
|
|
static void icuperiodcb(ICUDriver *icup) {
|
|
|
|
palClearPad(GPIOC, GPIOC_LED2);
|
|
last_period = icuGetPeriod(icup);
|
|
}
|
|
|
|
static ICUConfig icucfg = {
|
|
ICU_INPUT_ACTIVE_LOW,
|
|
10000, /* 10kHz ICU clock frequency. */
|
|
icuwidthcb,
|
|
icuperiodcb,
|
|
NULL,
|
|
ICU_CHANNEL_1,
|
|
0
|
|
};
|
|
|
|
/*
|
|
* 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 5 and ICU driver 3.
|
|
* GPIOC0 is the PWM output.
|
|
* GPIOC6 is the ICU input.
|
|
* The two pins have to be externally connected together.
|
|
*/
|
|
pwmStart(&PWMD5, &pwmcfg);
|
|
palSetPadMode(GPIOC, 0, PAL_MODE_ALTERNATE(2));
|
|
icuStart(&ICUD3, &icucfg);
|
|
palSetPadMode(GPIOC, 6, PAL_MODE_ALTERNATE(2));
|
|
icuEnable(&ICUD3);
|
|
chThdSleepMilliseconds(2000);
|
|
|
|
/*
|
|
* Starts the PWM channel 0 using 75% duty cycle.
|
|
*/
|
|
pwmEnableChannel(&PWMD5, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD5, 7500));
|
|
chThdSleepMilliseconds(5000);
|
|
|
|
/*
|
|
* Changes the PWM channel 0 to 50% duty cycle.
|
|
*/
|
|
pwmEnableChannel(&PWMD5, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD5, 5000));
|
|
chThdSleepMilliseconds(5000);
|
|
|
|
/*
|
|
* Changes the PWM channel 0 to 25% duty cycle.
|
|
*/
|
|
pwmEnableChannel(&PWMD5, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD5, 2500));
|
|
chThdSleepMilliseconds(5000);
|
|
|
|
/*
|
|
* Changes PWM period to half second the duty cycle becomes 50%
|
|
* implicitly.
|
|
*/
|
|
pwmChangePeriod(&PWMD5, 5000);
|
|
chThdSleepMilliseconds(5000);
|
|
|
|
/*
|
|
* Disables channel 0 and stops the drivers.
|
|
*/
|
|
pwmDisableChannel(&PWMD5, 0);
|
|
pwmStop(&PWMD5);
|
|
icuDisable(&ICUD3);
|
|
icuStop(&ICUD3);
|
|
|
|
/*
|
|
* Normal main() thread activity, in this demo it does nothing.
|
|
*/
|
|
while (TRUE) {
|
|
chThdSleepMilliseconds(500);
|
|
}
|
|
return 0;
|
|
}
|