#include "Driver_Timer.h"
#include "stm32f10x.h"
#include "stdio.h"

/* Timer init function */
void MyTimer_Base_Init(MyTimer_Struct_TypeDef * Timer)
{
	/* Reset the selected Timer */
	if(Timer->Timer == TIM1)
	{
		RCC->APB2ENR |= RCC_APB2ENR_TIM1EN;
	}
	else if(Timer->Timer == TIM2)
	{
		RCC->APB1ENR |= RCC_APB1ENR_TIM2EN;
	}
	else if(Timer->Timer == TIM3)
	{
		RCC->APB1ENR |= RCC_APB1ENR_TIM3EN;
	}
	else if(Timer->Timer == TIM4)
	{
		RCC->APB1ENR |= RCC_APB1ENR_TIM4EN;
	}
	
	Timer->Timer->PSC = Timer->PSC;
  	Timer->Timer->ARR = Timer->ARR;
}

/* Start function */
void MyTimer_Start(MyTimer_Struct_TypeDef * Timer)
{
	Timer->Timer->CR1 |= TIM_CR1_CEN;
}

/* Stop function*/
void MyTimer_Stop(MyTimer_Struct_TypeDef * Timer)
{
	Timer->Timer->CR1 &= ~TIM_CR1_CEN;
}

// Note : PWM Tested on PA0 
/*Configuration PWM*/
void MyTimer_ConfigurePWM(MyTimer_Struct_TypeDef *Timer, uint8_t channel, uint16_t duty_cycle) {

  uint16_t CCR_Value = (duty_cycle * TIM2->ARR) / 100;

  // Configurer le Channel
  if (Timer->channel == 1) {
	Timer->Timer->CCMR1 = TIM_CCMR1_OC1M_2 | TIM_CCMR1_OC1M_1;
	Timer->Timer->CCMR1 |= TIM_CCMR1_OC1PE; // activer la pr�charge du registre de comparaison
	Timer->Timer->CCER |= TIM_CCER_CC1E;
	Timer->Timer->CCR1 = CCR_Value;
  } else if (Timer->channel == 2) {
	Timer->Timer->CCMR1 = TIM_CCMR1_OC2M_2 | TIM_CCMR1_OC2M_1;
	Timer->Timer->CCMR1 |= TIM_CCMR1_OC2PE; // activer la pr�charge du registre de comparaison
	Timer->Timer->CCER |= TIM_CCER_CC2E;
	Timer->Timer->CCR2 = CCR_Value;
  } else if (Timer->channel == 3) {
	Timer->Timer->CCMR2 = TIM_CCMR2_OC3M_2 | TIM_CCMR2_OC3M_1;
	Timer->Timer->CCMR2 |= TIM_CCMR2_OC3PE; // activer la pr�charge du registre de comparaison
	Timer->Timer->CCER |= TIM_CCER_CC3E;
	Timer->Timer->CCER &= ~TIM_CCER_CC3P;
	Timer->Timer->CCR3 = CCR_Value;	
  } else if (Timer->channel == 4) {
	Timer->Timer->CCMR2 = TIM_CCMR2_OC4M_2 | TIM_CCMR2_OC4M_1;
	Timer->Timer->CCMR2 |= TIM_CCMR2_OC4PE; // activer la pr�charge du registre de comparaison
	Timer->Timer->CCER |= TIM_CCER_CC4E;
	Timer->Timer->CCR4 = CCR_Value;
  }
}

// Utiliser le TIM4
void MyTimer_ConfigureEncoder(MyTimer_Struct_TypeDef *Timer) {
    Timer->Timer->PSC = 0; // Configurer le prescaler à 0 (pour diviser l'horloge de base de 72 MHz par 1)
    Timer->Timer->ARR = 359; // Configurer la valeur maximale du compteur (pour éviter les problèmes de débordement)

	Timer->Timer->CCMR1 |= TIM_CCMR1_CC1S_0;
	Timer->Timer->CCMR1 |= TIM_CCMR1_CC2S_0;
	Timer->Timer->CCER &= ~TIM_CCER_CC1P;
	Timer->Timer->CCMR1 &= ~(TIM_CCMR1_IC1F_0 | TIM_CCMR1_IC1F_1 | TIM_CCMR1_IC1F_2 | TIM_CCMR1_IC1F_3);
	Timer->Timer->CCER &= ~TIM_CCER_CC2P;
	Timer->Timer->CCMR1 &= ~(TIM_CCMR1_IC2F_0 | TIM_CCMR1_IC2F_1 | TIM_CCMR1_IC2F_2 | TIM_CCMR1_IC2F_3);
	Timer->Timer->SMCR |= TIM_SMCR_SMS_0 | TIM_SMCR_SMS_1;


    // activer la clock pour le port GPIOC
    RCC->APB2ENR |= RCC_APB2ENR_IOPCEN;

    // configurer PC3 en mode entrée avec une pull-up
    GPIOC->CRL &= ~(GPIO_CRL_MODE3 | GPIO_CRL_CNF3);
    GPIOC->CRL |= GPIO_CRL_CNF3_1 | GPIO_CRL_MODE3_0;

    // configurer l'interruption pour PC3 en mode bord montant
    EXTI->IMR |= EXTI_IMR_MR3;
    EXTI->RTSR |= EXTI_RTSR_TR3;

    // configurer la priorité de l'interruption
    NVIC_SetPriority(EXTI3_IRQn, 1);

    // activer l'interruption
    NVIC_EnableIRQ(EXTI3_IRQn);
}


void Bug (void)
{
	while(1);
}
void (*TIM2_fx) (void) = &Bug;
void (*TIM3_fx) (void) = &Bug;
void (*TIM4_fx) (void) = &Bug;

/* Interrupt function */
void MyTimer_ActiveIT (TIM_TypeDef * Timer, char Prio, void (*IT_function)(void))
{
	Timer->DIER |= TIM_DIER_UIE;
	if(Timer == TIM1)
	{
	}
	if(Timer == TIM2)
	{
		NVIC_EnableIRQ(TIM2_IRQn);
		NVIC_SetPriority(TIM2_IRQn, Prio);
		TIM2_fx = IT_function;
	}
	if(Timer == TIM3)
	{
		NVIC_EnableIRQ(TIM3_IRQn);
		NVIC_SetPriority(TIM3_IRQn, Prio);
		TIM3_fx = IT_function;
	}
	if(Timer == TIM4)
	{
		NVIC_EnableIRQ(TIM4_IRQn);
		NVIC_SetPriority(TIM4_IRQn, Prio);
		TIM4_fx = IT_function;
	}
}

void TIM2_IRQHandler (void)
{
	TIM2->SR &= ~TIM_SR_UIF;
	(*TIM2_fx)();
}

void TIM3_IRQHandler (void)
{
	TIM3->SR &= ~TIM_SR_UIF;
	(*TIM3_fx)();
}

void TIM4_IRQHandler (void)
{
	TIM3->SR &= ~TIM_SR_UIF;
	(*TIM4_fx)();
}

int seed(int a) {
	return a = 2;
}

void EXTI3_IRQHandler(void) {

	int a = seed(a);	
}