#include <stm32f10x_lib.h>	   
#include "switch.h"	   
//初始化PA8和PD2為輸出口.并使能這兩個口的時鐘		    
//LED IO初始化
void SWITCH_Init(void)
{
	RCC->APB2ENR|=1<<2;    //使能PORTA時鐘	   	 
	   	 
	GPIOA->CRL&=0XFFFF0FFF; 
	GPIOA->CRL|=0X00003000;//PA4 推挽輸出   	 
    GPIOA->ODR|=1<<3;      //PA4 輸出高
											  
}