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F7 PWM-ICU demo working. 

git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@8255 35acf78f-673a-0410-8e92-d51de3d6d3f4
master
Giovanni Di Sirio 2015-08-29 12:25:38 +00:00
parent 9fb87de7e9
commit 159a64f916
1 changed files with 45 additions and 5 deletions
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50
testhal/STM32/STM32F7xx/PWM-ICU/main.c
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@ -63,12 +63,17 @@ static void icuperiodcb(ICUDriver *icup) {
last_period = icuGetPeriodX(icup);
}
static void icuovfcb(ICUDriver *icup) {
(void)icup;
}
static ICUConfig icucfg = {
ICU_INPUT_ACTIVE_HIGH,
10000, /* 10kHz ICU clock frequency. */
icuwidthcb,
icuperiodcb,
NULL,
icuovfcb,
ICU_CHANNEL_1,
0
};
@ -101,18 +106,24 @@ int main(void) {
palSetPadMode(GPIOA, GPIOA_ARD_D5, PAL_MODE_ALTERNATE(1));
/*
* Starting ICU driver 2 and enabling the notifications.
* Starting ICU driver 2.
* GPIOA15 is programmed as ICU input (channel 1 of TIM2).
*/
icuStart(&ICUD2, &icucfg);
palSetPadMode(GPIOA, GPIOA_ARD_D9, PAL_MODE_ALTERNATE(1));
icuEnableNotifications(&ICUD2);
/*
* GPIOI1 is programmed as output (board LED).
*/
palClearPad(GPIOI, GPIOI_ARD_D13);
palSetPadMode(GPIOI, GPIOI_ARD_D13, PAL_MODE_OUTPUT_PUSHPULL);
chThdSleepMilliseconds(1000);
/*
* Starting ICU capture.
* Starting ICU capture and enabling the notifications.
*/
icuStartCapture(&ICUD2);
icuEnableNotifications(&ICUD2);
/*
* Normal main() thread activity, various PWM patterns are generated
@ -120,6 +131,35 @@ int main(void) {
* board LED mirrors the PWM output.
*/
while (true) {
chThdSleepMilliseconds(500);
/*
* Starts the PWM channel 0 using 75% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 7500));
pwmEnableChannelNotification(&PWMD1, 0);
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 50% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 5000));
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 25% duty cycle.
*/
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 2500));
chThdSleepMilliseconds(5000);
/*
* Changes PWM period to half second the duty cycle becomes 50%
* implicitly.
*/
pwmChangePeriod(&PWMD1, 5000);
chThdSleepMilliseconds(5000);
/*
* Disables channel 0.
*/
pwmDisableChannel(&PWMD1, 0);
}
}