int_a.c

MSP430z_f247.rar

# include "INT_a.h"
static unsigned char Key_Down_Flag = 0;

void INT_a_Device_INIT(void)
{
	INT_a_PORT_INIT();
	P1INT_INIT();
}

void P1INT_INIT(void)
{
	P1IE |= BIT4;                       		//中断使能
	
	//P1IES &= ~BI4;							//上升沿触发
	P1IES |= BIT4;								//下降沿触发
				
  	P1IFG &= ~(BIT4);                     		//清除中断标志
}

void INT_a_PORT_INIT()
{
	P1DIR |= BIT0| BIT1;                      //用于指示用
}

#pragma vector=PORT1_VECTOR
__interrupt void Port_1(void)
{
	if(P1IFG&BIT4)
	{
		//P1OUT ^= BIT0;                        //取反
	  	
		////////////////////////
		Key_Down_Flag = 1;
		
		////////////////////////
		P1IFG &= ~BIT4;                         //软件清除中断标志
	}
	else if(P1IFG&BIT3)
	{
		P1OUT ^= BIT1;
		P1IFG &= ~BIT3;
	}
}

unsigned char Get_Key_Down(void)
{
	return Key_Down_Flag;
}

void Clear_Key_Down_Flag(void)
{
	Key_Down_Flag = 0;
}