显示子程序.zip

#include <reg51.h> #define BYTE unsigned char #define WORD unsigned int const BYTE DATA_7SEG[ ] ={0xc0,0xF9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90}; BYTE led[4],min,sec,dms; //delay()________________________________________________ void delay(BYTE t) {BYTE i; for (i=0;i<t;i++); } //delay10ms()____________________________________________ void delay10ms(WORD count) {WORD i,j,k; for(i=0;i<count;i++) for(j=0;j<10;j++) for(k=0;k<120;k++) ; } //display()______________________________________________________ void display(void) {BYTE i; for (i=0;i<4;i++) {P1=~(1<<i); //低电平驱位选 P0=DATA_7SEG[led[i]]; delay(255); //about 1.5ms } P0=0xff; P1=0xff; } void disp_init(void) { BYTE i; led[0]=8; led[1]=8; led[2]=8; led[3]=8; for(i=0;i<200;i++) display(); delay10ms(100); led[0]=0; led[1]=1; led[2]=2; led[3]=3; for(i=0;i<50;i++) display(); delay10ms(50); led[0]=4; led[1]=5; led[2]=6; led[3]=7; for(i=0;i<50;i++) display(); delay10ms(50); led[0]=8; led[1]=9; led[2]=0; led[3]=0; for(i=0;i<50;i++) display(); delay10ms(50); } //Time0()_________________________________________________________ void Time0(void)interrupt 1 using 1 {TL0=0xf0; TH0=0xd8; TR0=1; dms++; if(dms>99) { dms=0; sec++; if (sec>59) {sec=0; min++; if(min>59)min=0; } } } //________________________________________________________________ void main(void) { BYTE j; P0=0xff; P1=0xff; P2=0xff; P3=0xff; TMOD=0X01; TL0=0xf0; TH0=0xd8; ET0=1; EA=1; disp_init(); //初始化显示 delay10ms(200); TR0=1; while(1) { ET0=0; led[3]=min/10; led[2]=min%10; led[1]=sec/10; led[0]=sec%10; ET0=1; for(j=0;j<10;j++) display(); } }