//prescaler formula for period:
//T = (1/APB_TIM_CLK in Hz) * (PRESCALER_Value + 1) * (PERIOD_Value (ARR register) + 1)

/* Assymetric PWM mode:
 *   CH1 & CH2 are switched to center alligned mode, when chosen more than 2 channels in Assymetric mode, the 
 *   rest will be in normal PWM mode.
 *   TIMx->CCR1 controls length of CH1 pulse after center and length of CH2 pulse before center.
 *   TIMx->CCR2 controls length of CH1 pulse before center and length of CH2 pulse after center.
 *   TIMx->CCR3,4 controls length of CH3,4 pulse after center
*/

/* PWM dynamic duty cycle:
 *    TIMx->CCMRxOutput ->-> OCxPE = 1 // setup of shaddow register
 *    TIMx->CCRx = x // set pulse length
 *    shaddow register is important for stability of program, because the new value will be written, when new
 *    cycle is begun.
*/

//enable period elapsed callback
TIM3->DIER |= 1 << 0;

//callbacks
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim){
	if(htim -> Instance == TIM3){
	}
}

void HAL_TIM_IC_CaptureCallback(TIM_HandleTypeDef *htim){
	if(htim -> Instance == TIM3){
	}
}