中断控制四位数码管 - - Powered by Discuz!

标题: 中断控制四位数码管 [打印本页]

作者: 123345 时间: 2016-7-3 19:24
标题: 中断控制四位数码管

#include<reg51.h>

unsignedchar code LED_MOD_ANODE[]={0xc0,0xf9,0xa4,0xB0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0xff};

unsignedchar code BIT_CONTROL[]={0x01,0x02,0x04,0x08};

unsignedchar LED_COM[]={0xff,0xff,0xff,0xff};

unsignedchar code key_buf[]={0xee,0xde,0xbe,0x7e,

0xed,0xdd,0xbd,0x7d,

0xeb,0xdb,0xbb,0x7b,

0xe7,0xd7,0xb7,0x77};

unsignedint n = 0;

voiddelay(unsigned char m){

for(;m>0;m--){

unsigned char i;

for(i=125;i>0;i--);

}

voiddisplay(){

unsigned char j;

for(j=0;j<4;j++){

P0=LED_MOD_ANODE[LED_COM[j]];

P2=BIT_CONTROL[j];

delay(2);

P2=0x00;

}

voidgetkey(void) interrupt 0 using 1{

char key_scan[]={0xef,0xdf,0xbf,0x7f};

unsigned char i=0,j=0;

EA=0;

for(i=0;i<4;i++){

P1=key_scan;

for(j=0;j<16;j++){

if(P1==key_buf[j]){

LED_COM[0]=LED_COM[1];

LED_COM[1]=LED_COM[2];

LED_COM[2]=LED_COM[3];

LED_COM[3]=j;

k++;

if(n>4) {LED_COM[0]=LED_COM[1]=LED_COM[2]=0X10;n=1;}

break;

}

}P1=0x0f;EA=1;

}

voidmain(){

unsigned char i=0;

LED_COM[0]=LED_COM[1]=LED_COM[2]=LED_COM[3]=0X10;

display();

P1=0x0f;

IT0=1;

EX0=1;

EA=1;

while(1){

display();}