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timer stm32 full

#include "stm32f10x.h"
#include "stm32f10x_tim.h"

int hitung=0;
void TIM4_IRQHandler(){
	if(TIM_GetITStatus(TIM4, TIM_IT_Update)){
		hitung++;
		// taruh sini koding untuk sampling data
		TIM_ClearITPendingBit(TIM4, TIM_IT_Update);
	}
}

int main(void){
	
	// enable TIM4
	RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM4, ENABLE);
	
	// mengatur timer 40ms = 0,04s (25Hz)
	// clock / (prescale +1)
	// 72.000.000/ (7199+1) = 10.000
	// Periode = (10.000 / 25 )-1=400-1=399
	TIM_TimeBaseInitTypeDef ST;
	ST.TIM_Prescaler = 7199;
	ST.TIM_Period = 399;
	ST.TIM_ClockDivision = TIM_CKD_DIV1;
	ST.TIM_CounterMode = TIM_CounterMode_Up;
	TIM_TimeBaseInit(TIM4, &ST);
	
	//enable interupt
	TIM_ITConfig(TIM4, TIM_IT_Update, ENABLE);
	// mulai tim4
	TIM_Cmd(TIM4, ENABLE);
	
	NVIC_InitTypeDef NVIC_InitStruct;
	// Nested vectored interrupt settings
	NVIC_InitStruct.NVIC_IRQChannel = TIM4_IRQn;
	NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 0x00;
	NVIC_InitStruct.NVIC_IRQChannelSubPriority = 0x00;
	NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStruct);
	
	while(1){
	}
}