STM32F042-Drivers-Pub/tim3.c

/*
 *  tim3.c
 *
 *  Created on: Dec 30, 2023
 *  Author: Francesco Gritti
 */


#include "main.h"
#include "mcu.h"
#include "gpio.h"


#ifdef tim3_adc_timebase


void TIM3_init (void) {

	RCC_TIM3_CLK_ENABLE();


	TIM3->CR1 = 0x0000;
	TIM3->CR2 = (0b010 << TIM_CR2_MMS_Pos);
	TIM3->DIER = 0x0000;	// disable all interrupt requests

	TIM3->PSC = 24-1;
	TIM3->ARR = 1000 -1;


	TIM3->CR1 |= TIM_CR1_CEN;
}


#endif


#ifdef tim3_pwm


void TIM3_pwm_config_ch1 (TIM_OC_ACTIVE_STATE_enum activeState, u16 value) {
	TIM3->CCMR1 = (TIM_FORCE_INACTIVE << TIM_CCMR1_OC1M_Pos) | TIM_CCMR1_OC1PE;

	if (activeState == TIM_OC_ACTIVE_HIGH)
		TIM_PWM_SET_CH1_POLARITY_ACTIVE_HIGH (TIM3);
	else
		TIM_PWM_SET_CH1_POLARITY_ACTIVE_LOW (TIM3);

	TIM3->CCR1 = value;
	TIM_CH1_FORCE_INACTIVE(TIM3);
	TIM_CH1_ENABLE(TIM3);
}

void TIM3_pwm_config_ch2 (TIM_OC_ACTIVE_STATE_enum activeState, u16 value) {
	TIM3->CCMR1 = (TIM_FORCE_INACTIVE << TIM_CCMR1_OC2M_Pos) | TIM_CCMR1_OC2PE;

	if (activeState == TIM_OC_ACTIVE_HIGH)
		TIM_PWM_SET_CH2_POLARITY_ACTIVE_HIGH (TIM3);
	else
		TIM_PWM_SET_CH2_POLARITY_ACTIVE_LOW (TIM3);

	TIM3->CCR2 = value;
	TIM_CH2_FORCE_INACTIVE(TIM3);
	TIM_CH2_ENABLE(TIM3);
}

void TIM3_pwm_config_ch3 (TIM_OC_ACTIVE_STATE_enum activeState, u16 value) {
	TIM3->CCMR2 = (TIM_FORCE_INACTIVE << TIM_CCMR2_OC3M_Pos) | TIM_CCMR2_OC3PE;

	if (activeState == TIM_OC_ACTIVE_HIGH)
		TIM_PWM_SET_CH3_POLARITY_ACTIVE_HIGH (TIM3);
	else
		TIM_PWM_SET_CH3_POLARITY_ACTIVE_LOW (TIM3);

	TIM3->CCR3 = value;
	TIM_CH3_ENABLE(TIM3);
}

void TIM3_pwm_config_ch4 (TIM_OC_ACTIVE_STATE_enum activeState, u16 value) {
	TIM3->CCMR2 = (TIM_FORCE_INACTIVE << TIM_CCMR2_OC4M_Pos) | TIM_CCMR2_OC4PE;

	if (activeState == TIM_OC_ACTIVE_HIGH)
		TIM_PWM_SET_CH4_POLARITY_ACTIVE_HIGH (TIM3);
	else
		TIM_PWM_SET_CH4_POLARITY_ACTIVE_LOW (TIM3);

	TIM3->CCR4 = value;
	TIM_CH4_ENABLE(TIM3);
}

void TIM3_pwm_init (void) {

	RCC_TIM3_CLK_ENABLE ();

	TIM3->CR1 = 0x0000;
	TIM3->CR2 = 0x0000;
	TIM3->SMCR = 0x0000;
	TIM3->DIER = 0x0000;


	// disable all channels
	TIM3->CCER = 0x0000;

	// enable ch3 and ch4, force them inactive
	TIM3->CCMR1 = 0x0000;
	TIM3->CCMR2 = 0x0000;


	// reset counter
	TIM3->CNT = 0x0000;
	//set PRESCALER
	TIM3->PSC = TIM3_PSC;
	// set PERIOD
	TIM3->ARR = TIM3_PERIOD;

	// reset all PWM periods
	TIM3->CCR1 = 0x0000;
	TIM3->CCR2 = 0x0000;
	TIM3->CCR3 = 0x0000;
	TIM3->CCR4 = 0x0000;

	TIM_COUNTER_ENABLE (TIM3);
}


#elif defined(tim3_ic)





void TIM3_ic_config_ch1 (TIM_IC_ACTIVE_EDGE_enum activeState, u8 filterValue) {
	// disable channel
	TIM3->CCER &= ~TIM_CCER_CC1E;

	TIM3->CCMR1 = ((filterValue & 0x0f) << TIM_CCMR1_IC1F_Pos) | (0b01 << TIM_CCMR1_CC1S_Pos);

	// clear edge selection bit => default rising edge
	TIM3->CCER &= ~(TIM_CCER_CC1NP | TIM_CCER_CC1P);
	switch (activeState) {
	case TIM_IC_ACTIVE_RISING:
		break;
	case TIM_IC_ACTIVE_FALLING:
		TIM3->CCER |= TIM_CCER_CC1P;
		break;
	case TIM_IC_ACTIVE_BOTH:
		TIM3->CCER |= (TIM_CCER_CC1NP | TIM_CCER_CC1P);
		break;
	}

	// enable interrupt on channel compare
	TIM3->DIER |= TIM_DIER_CC1IE;

	// enable the channel
	TIM3->CCER |= TIM_CCER_CC1E;
}

void TIM3_ic_config_ch2 (TIM_IC_ACTIVE_EDGE_enum activeState, u8 filterValue) {
	// disable channel
	TIM3->CCER &= ~TIM_CCER_CC2E;

	TIM3->CCMR1 = ((filterValue & 0x0f) << TIM_CCMR1_IC2F_Pos) | (0b01 << TIM_CCMR1_CC2S_Pos);

	// clear edge selection bit => default rising edge
	TIM3->CCER &= ~(TIM_CCER_CC2NP | TIM_CCER_CC2P);
	switch (activeState) {
	case TIM_IC_ACTIVE_RISING:
		break;
	case TIM_IC_ACTIVE_FALLING:
		TIM3->CCER |= TIM_CCER_CC2P;
		break;
	case TIM_IC_ACTIVE_BOTH:
		TIM3->CCER |= (TIM_CCER_CC2NP | TIM_CCER_CC2P);
		break;
	}

	// enable interrupt on channel compare
	TIM3->DIER |= TIM_DIER_CC2IE;

	// enable the channel
	TIM3->CCER |= TIM_CCER_CC2E;
}

void TIM3_ic_config_ch3 (TIM_IC_ACTIVE_EDGE_enum activeState, u8 filterValue) {
	// disable channel
	TIM3->CCER &= ~TIM_CCER_CC3E;

	TIM3->CCMR2 = ((filterValue & 0x0f) << TIM_CCMR2_IC3F_Pos) | (0b01 << TIM_CCMR2_CC3S_Pos);

	// clear edge selection bit => default rising edge
	TIM3->CCER &= ~(TIM_CCER_CC3NP | TIM_CCER_CC3P);
	switch (activeState) {
	case TIM_IC_ACTIVE_RISING:
		break;
	case TIM_IC_ACTIVE_FALLING:
		TIM3->CCER |= TIM_CCER_CC3P;
		break;
	case TIM_IC_ACTIVE_BOTH:
		TIM3->CCER |= (TIM_CCER_CC3NP | TIM_CCER_CC3P);
		break;
	}

	// enable interrupt on channel compare
	TIM3->DIER |= TIM_DIER_CC3IE;

	// enable the channel
	TIM3->CCER |= TIM_CCER_CC3E;
}

void TIM3_ic_config_ch4 (TIM_IC_ACTIVE_EDGE_enum activeState, u8 filterValue) {
	// disable channel
	TIM3->CCER &= ~TIM_CCER_CC3E;

	TIM3->CCMR2 = ((filterValue & 0x0f) << TIM_CCMR2_IC4F_Pos) | (0b01 << TIM_CCMR2_CC4S_Pos);

	// clear edge selection bit => default rising edge
	TIM3->CCER &= ~(TIM_CCER_CC4NP | TIM_CCER_CC4P);
	switch (activeState) {
	case TIM_IC_ACTIVE_RISING:
		break;
	case TIM_IC_ACTIVE_FALLING:
		TIM3->CCER |= TIM_CCER_CC4P;
		break;
	case TIM_IC_ACTIVE_BOTH:
		TIM3->CCER |= (TIM_CCER_CC4NP | TIM_CCER_CC4P);
		break;
	}

	// enable interrupt on channel compare
	TIM3->DIER |= TIM_DIER_CC4IE;

	// enable the channel
	TIM3->CCER |= TIM_CCER_CC4E;
}




void TIM3_ic_init(void) {

	RCC_TIM3_CLK_ENABLE();

	TIM3->CCMR1 = 0x00000000;
	TIM3->CCMR2 = 0x00000000;


	/* Configure base timer */
	// enable interrupt on timer update
	TIM3->DIER = TIM_DIER_UIE;

	TIM3->PSC = TIM3_PSC;
	TIM3->ARR = TIM3_PERIOD;

	// request UEV event only on underflow/overflow and enable timer
	TIM3->CR1 = TIM_CR1_URS | TIM_CR1_CEN;

	// set highest priority since the handler is a non blocking function
	NVIC_SetPriority(TIM3_IRQn, 0);
	NVIC_EnableIRQ(TIM3_IRQn);
}



__attribute__ ((weak)) void TIM3_IRQHandler (void) {

	// clear IT flag
	if ((TIM3->SR & TIM_SR_CC1IF) != 0)
		TIM3->SR &= ~TIM_SR_CC1IF;

	if ((TIM3->SR & TIM_SR_CC2IF) != 0)
			TIM3->SR &= ~TIM_SR_CC2IF;

	if ((TIM3->SR & TIM_SR_CC3IF) != 0)
			TIM3->SR &= ~TIM_SR_CC3IF;

	if ((TIM3->SR & TIM_SR_CC4IF) != 0)
			TIM3->SR &= ~TIM_SR_CC4IF;

	if ((TIM3->SR & TIM_SR_UIF) != 0)
		TIM3->SR &= ~TIM_SR_UIF;
}


#endif