#include "TIMER.h"

/*periode_timer=peridoe_horloge*prescaler*resolution
debordement stocké dans registre UIF
fixer val prescaler+ autoreload(equivalent resolution)
demarrage timer => CEN=1*/

void (*tim_ptr1_func)(void);
void (*tim_ptr2_func)(void);
void (*tim_ptr3_func)(void);
void (*tim_ptr4_func)(void);

void MyTimer_Base_Init ( MyTimer_Struct_TypeDef * Timer)
{
	if(Timer->Timer==TIM1)
	{
		RCC->APB2ENR |= 0x01<<11;
	}
	else if (Timer->Timer==TIM2)
	{
		RCC->APB1ENR |= 0x01;
	}
	else if (Timer->Timer==TIM3)
	{
		RCC->APB1ENR |= 0x01<<1;
	}
	else if (Timer->Timer==TIM4)
	{
		RCC->APB1ENR |= 0x01<<2;
	}
	Timer->Timer->ARR=Timer->ARR;
	Timer->Timer->PSC=Timer->PSC;
}

void MyTimer_ActiveIT (TIM_TypeDef * Timer, char Prio, void (*IT_function)(void))
{
	int num_tim;
	Timer->DIER |= 0x01;
	if(Timer==TIM1)
	{
		num_tim=TIM1_UP_IRQn;
		tim_ptr1_func=IT_function;		
	}
	else if(Timer==TIM2)
	{
		num_tim=TIM2_IRQn;
		tim_ptr2_func=IT_function;
	}
	else if(Timer==TIM3)
	{
		num_tim=TIM3_IRQn;
		tim_ptr3_func=IT_function;
	}
	else if(Timer==TIM4)
	{
		num_tim=TIM4_IRQn;
		tim_ptr4_func=IT_function;
	}
	NVIC->ISER[0] |= 0x01<<num_tim;  
	NVIC->IP[num_tim] |= Prio << 4;
	
}

void init_encoder_timer(TIM_TypeDef * Timer)  //voir page 391
{
	Timer->SMCR = 0x1;
	
}

void TIM2_IRQHandler (void)
{
	if(tim_ptr2_func!=0)
	{
		(*tim_ptr2_func)();
	}
	TIM2->SR  &= ~(1<<0) ;
}

void TIM3_IRQHandler (void)
{
	if(tim_ptr3_func!=0)
	{
		(*tim_ptr3_func)();
	}
	TIM3->SR  &= ~(1<<0) ;
}

void TIM4_IRQHandler (void)
{
	if(tim_ptr4_func!=0)
	{
		(*tim_ptr4_func)();
	}
	TIM4->SR  &= ~(1<<0) ;
}

void TIM1_UP_IRQHandler (void)
{
	if(tim_ptr1_func!=0)
	{
		(*tim_ptr1_func)();
	}
	TIM1->SR  &= ~(1<<0) ;
}