中断+数码管

#include "MSP430F149.h"

intg_led[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void IO_init()

{

P1DIR = 0xff;

P2DIR = 0xff;

}

int get_num(int i)

{

if(i>=0 &&i<10)

{

return g_led[i];

}

return 0XFF;

}

void echo_num(long num)

{

if(0<=num &&num<=99999999)

{

int n;

for(n=0;n<8 &&num;++n)

{

P1OUT = 0;

P2OUT = 7-n;

P1OUT = get_num( num );

num /= 10;

__delay_cycles(1000);

}

}

}

void main(void)

{

WDTCTL=WDTPW+WDTHOLD;

IO_init();

P2DIR &= ~BIT3;

P2IE = 0;

P2IES = 0;

P2IFG = 0;

P2IE |= BIT3;

P2IES &= ~BIT3;

_BIS_SR(LPM4_bits+GIE);

while(1);

//int i;

}

#pragma vector = PORT2_VECTOR

__interrupt void ITR00()

{

while(1)

{

long i;

for(i=0;i<100000000;++i)

{

echo_num(i);

__delay_cycles(10);

}

}

}