PWM on ServoMotor (STM32F3DISCOVERY)
Posted: Wed Dec 18, 2019 5:33 pm
Hello,
I'm trying to use a servo motor on the STM32F3DISCOVERY board. I read on the web that it must be controlled by PWM. My problem is that I tried to use it but without success. Below you can find the code that I have used. Can you help me with that?
I'm trying to use a servo motor on the STM32F3DISCOVERY board. I read on the web that it must be controlled by PWM. My problem is that I tried to use it but without success. Below you can find the code that I have used. Can you help me with that?
Code: Select all
#include "ch.h"
#include "hal.h"
static PWMConfig pwmcfg = {
200000,
1000,
NULL,
{
{PWM_OUTPUT_ACTIVE_HIGH, NULL},
{PWM_OUTPUT_ACTIVE_HIGH, NULL},
{PWM_OUTPUT_ACTIVE_HIGH, NULL},
{PWM_OUTPUT_ACTIVE_HIGH, NULL}
},
0,
0
};
int main(void) {
halInit();
chSysInit();
palSetPadMode(GPIOE, 6, PAL_MODE_ALTERNATE(2));
pwmStart(&PWMD1, &pwmcfg);
while (1) {
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 1000)); // 10% duty cycle
chThdSleepMilliseconds(2000);
pwmEnableChannel(&PWMD1, 0, PWM_PERCENTAGE_TO_WIDTH(&PWMD1, 9000)); // 90% duty cycle
chThdSleepMilliseconds(2000);
}
return 0;
}