利用动态扫描和定时器1在数码管上显示出从765432开始以 1/10秒的速度往下递减直至765398并保持显示此数,与此 同时利用定时器0以500MS速度进行流水灯从上至下移动,当 数码管上数减到停止时,实验板上流水灯也停止然后全部开始 闪烁,3秒后(用T0定时)流水灯全部关闭、数码管上显示出 ‘HELLO’,到此保持住。 #include<reg52.h> #include<intrins.h> #define uchar unsigned char #define uint unsigned int uchar temp,t0,t1,flag,flag1; uint shu; uchar aa,bb,cc,bai,shi,ge; sbit wela=P2^0; sbit dula=P2^1; uchar code table[]={ 0x3f,0x06,0x5b,0x4f, 0x66,0x6d,0x7d,0x07, 0x7f,0x6f,0x77,0x7c, 0x39,0x5e,0x7b,0x71, 0x76,0x79,0x38,0x3f,0}; void init(); void Delay(uchar z); void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge); void main() { init(); while(1) { if(flag1!=1) { display(7,6,5,bai,shi,ge); } else { display(16,17,18,18,19,20); } } } void init() { flag=0; shu=432; temp=0xfe; P1=temp; TMOD=0x11; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TH1=(65536-50000)/256; TL1=(65536-50000)%256; EA=1; ET0=1; ET1=1; TR0=1; TR1=1; } void timer0() interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; t0++; if(flag!=1) { if(t0==10) { t0=0; temp=_crol_(temp,1); P1=temp; } } else { if(t0%4==0) { P1=~P1; if(t0==60) { TR0=0; P1=0xff; flag1=1; } } } } void timer1() interrupt 3 { TH1=(65536-50000)/256; TL1=(65536-50000)%256; t1++; if(t1==2) { t1=0; shu--; bai=shu/100; shi=shu%100/10; ge=shu%10; if(shu==398) { TR0=0; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TR0=1; flag=1; t0=0; P1=0xff; TR1=0; } } } void Delay(uchar z) { uchar x,y; for(x=z;x>0;x--) { for(y=110;y>0;y--); } } void display(uchar aa,uchar bb,uchar cc,uchar bai,uchar shi,uchar ge) { dula=1; P0=table[aa]; dula=0; P0=0xff; wela=1; P0=0xfe; wela=0; Delay(1); dula=1; P0=table[bb]; dula=0; P0=0xff; wela=1; P0=0xfd; wela=0; Delay(1); dula=1; P0=table[cc]; dula=0; P0=0xff; wela=1; P0=0xfb; wela=0; Delay(1); dula=1; P0=table[bai]; dula=0; P0=0xff; wela=1; P0=0xf7; wela=0; Delay(1); dula=1; P0=table[shi]; dula=0; P0=0xff; wela=1; P0=0xef; wela=0; Delay(1); dula=1; P0=table[ge]; dula=0; P0=0xff; wela=1; P0=0xdf; wela=0; Delay(1); }