MSP430按键中断Ⅱ

#include

typedef unsigned char uchar;

typedef unsigned int uint;

#define keyin (P1IN & 0X0F)

#define wei_h P5OUT |= BIT5

#define wei_l P5OUT &= BIT5

#define duan_l P6OUT &= ~BIT6

#define duan_h P6OUT |= BIT6

uchar table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

//uchar num = 0;

uint keyval=0;

void delay(int z)

{

int i,j;

for(i=z;i>0;i--)

for(j=112;j>0;j--);

}

void display(uchar dat)

{

P4OUT = table[dat];

duan_h;

duan_l;

P4OUT = 0x00;

wei_h;

wei_l;

}

void main( void )

{

// uint temp,keyval;

P1IES = 0X0F; //下降沿触发

P1IE = 0X0F;

P1DIR = 0XF0;

P1OUT = 0X00;

// P1DIR = 0XFF;P1OUT = 0XFF;

P4DIR = 0XFF;P4OUT = 0X00;

P5DIR = 0XFF;P5OUT = 0XF7;

P6DIR = 0XFF;

_EINT();

// Stop watchdog timer to prevent time out reset

WDTCTL = WDTPW + WDTHOLD;

while(1)

{

LPM1;

}

}

#pragma vector = PORT1_VECTOR

__interrupt void PORT1_ISR(void)

{

if(P1IFG & 0X0F)

{

switch(P1IFG)

{

case 0x01:

if(keyin == 0x0e)

{

delay(20);

if(keyin == 0x0e)

{

while(keyin != 0x0f)

keyval = 1;

display(keyval);

P1IFG = 0; //必须软件清除

return;

}

}

case 0x02:

if(keyin == 0x0d)

{

delay(20);

if(keyin == 0x0d)

{

while(keyin != 0x0f)

keyval = 1;

display(keyval);

P1IFG = 0; //必须软件清除

return;

}

}

case 0x03:

if(keyin == 0x0b)

{

delay(20);

if(keyin == 0x0b)

{

while(keyin != 0x0f)

keyval = 1;

display(keyval);

P1IFG = 0; //必须软件清除

return;

}

}

case 0x04:

if(keyin == 0x07)

{

delay(20);

if(keyin == 0x07)

{

while(keyin != 0x0f)

keyval = 1;

display(keyval);

P1IFG = 0; //必须软件清除

return;

}

}

}

}

}