int timer_set_pwm_duty(hacs_pwm_chan_t pwm, float percent)
{
hacs_timer_t tim = (pwm > HACS_PWM_CHAN_4) ? HACS_PWM_TIMER_1 : HACS_PWM_TIMER_0;
TIM_HandleTypeDef *htim = &tim_handles[tim];
uint32_t period = __HAL_TIM_GetAutoreload(htim);
uint32_t compare = (uint32_t)((float)period*percent);
__HAL_TIM_SetCompare(htim, pwm_chan_to_tim_chan[pwm], compare);
return HACS_NO_ERROR;
}
// Helper function for determining the period used for calculating percent
STATIC uint32_t compute_period(pyb_timer_obj_t *self) {
// In center mode, compare == period corresponds to 100%
// In edge mode, compare == (period + 1) corresponds to 100%
uint32_t period = (__HAL_TIM_GetAutoreload(&self->tim) & TIMER_CNT_MASK(self));
if (period != 0xffffffff) {
if (self->tim.Init.CounterMode == TIM_COUNTERMODE_UP ||
self->tim.Init.CounterMode == TIM_COUNTERMODE_DOWN) {
// Edge mode
period++;
}
}
return period;
}
STATIC void pyb_timer_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
pyb_timer_obj_t *self = self_in;
if (self->tim.State == HAL_TIM_STATE_RESET) {
print(env, "Timer(%u)", self->tim_id);
} else {
print(env, "Timer(%u, prescaler=%u, period=%u, mode=%s, div=%u)",
self->tim_id,
self->tim.Instance->PSC & 0xffff,
__HAL_TIM_GetAutoreload(&self->tim) & TIMER_CNT_MASK(self),
self->tim.Init.CounterMode == TIM_COUNTERMODE_UP ? "UP" :
self->tim.Init.CounterMode == TIM_COUNTERMODE_DOWN ? "DOWN" : "CENTER",
self->tim.Init.ClockDivision == TIM_CLOCKDIVISION_DIV4 ? 4 :
self->tim.Init.ClockDivision == TIM_CLOCKDIVISION_DIV2 ? 2 : 1);
}
}
