I have problems with 2.6.3 using the ICU wihtout a period CB (on a STM32F4Discovery board). If I define a dummy period CB, 2.6.3 works as 2.6.2.Without the periodCB, the widthCB does not get called. Here is a modified PWM_ICU example showing the problem:
Code: Select all
#include "ch.h"
#include "hal.h"
static void pwmpcb(PWMDriver *pwmp)
{
(void)pwmp;
palClearPad(GPIOD, GPIOD_LED5);
}
static void pwmc1cb(PWMDriver *pwmp)
{
(void)pwmp;
palSetPad(GPIOD, GPIOD_LED5);
}
static PWMConfig pwmcfg = {
10000, /* 10kHz PWM clock frequency. */
10000, /* Initial PWM period 1S. */
pwmpcb,
{
{PWM_OUTPUT_ACTIVE_HIGH, 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)
{
palTogglePad(GPIOD, GPIOD_LED4);
last_width = icuGetWidth(icup);
}
static void icuperiodcb(ICUDriver *icup)
{
last_period = icuGetPeriod(icup);
}
static ICUConfig icucfg = {
ICU_INPUT_ACTIVE_HIGH,
10000, /* 10kHz ICU clock frequency. */
icuwidthcb,
NULL, //icuperiodcb, // without the period cb, the widht cb does NOT get called in 2.6.3???
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 2 and ICU driver 3.
* GPIOA15 is the PWM output.
* GPIOC6 is the ICU input.
* The two pins have to be externally connected together.
*/
pwmStart(&PWMD2, &pwmcfg);
palSetPadMode(GPIOA, 15, PAL_MODE_ALTERNATE(1));
icuStart(&ICUD3, &icucfg);
palSetPadMode(GPIOC, 6, PAL_MODE_ALTERNATE(2));
icuEnable(&ICUD3);
chThdSleepMilliseconds(2000);
/*
* Starts the PWM channel 0 using 75% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 7500));
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 50% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 5000));
chThdSleepMilliseconds(5000);
/*
* Changes the PWM channel 0 to 25% duty cycle.
*/
pwmEnableChannel(&PWMD2, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD2, 2500));
chThdSleepMilliseconds(5000);
/*
* Changes PWM period to half second the duty cycle becomes 50%
* implicitly.
*/
pwmChangePeriod(&PWMD2, 5000);
chThdSleepMilliseconds(5000);
/*
* Disables channel 0 and stops the drivers.
*/
pwmDisableChannel(&PWMD2, 0);
pwmStop(&PWMD2);
icuDisable(&ICUD3);
icuStop(&ICUD3);
palClearPad(GPIOD, GPIOD_LED4);
palClearPad(GPIOD, GPIOD_LED5);
/*
* Normal main() thread activity, in this demo it does nothing.
*/
while (TRUE) {
chThdSleepMilliseconds(500);
}
return 0;
}
