51单片机里程仪设计1602显示C程序

#include<reg52.h> #define bike_cm 66.04 #define uchar unsigned char #define uint unsigned int sbit rs=P2^0; sbit rw=P2^1; sbit ep=P2^2; uchar code table[] ="rate"; uchar code table1[]="km/h"; uchar hou,min,sec,tt,num,q; uint rate,su; float mile,bike_fm; /* 延时程序 */ void delay(uint z) { uint x,y; for(x=z;x>0;x--) for(y=110;y>0;y--); } /*写入指令数据到LcD */ void write_com(uchar com) { rs = 0; ep = 0; P0=com; delay(5); ep = 1; delay(5); ep = 0; } /* 写入字符显示数据到LcD */ void write_data(uchar date) { rs =1; P0=date; delay(5); ep = 1; delay(5); ep = 0; } //把那些数字转化成能显示出来的格式 void lcd_sfm(uchar add,uchar aa) { uchar shi,ge; shi=aa/10; ge =aa%10; write_com(0x80+add); write_data(0x30+shi); write_data(0x30+ge); } void lcd_sfm1(uint i) { uchar qian,bai,shi,ge; qian=i/1000; bai=i/100-qian*10; shi=i/10-qian*100-bai*10; ge =i%10; write_com(0x80+0x45); write_data(0x30+qian); write_data(0x30+bai); write_com(0x80+0x48); write_data(0x30+shi); write_data(0x30+ge); } void lcd_sfm2(uint i) { uchar wang,qian,bai,shi,ge; wang=i/10000; qian=i/1000-wang*10; bai=i/100-wang*100-qian*10; shi=i/10-wang*1000-qian*100-bai*10; ge =i%10; write_com(0x80+0x09); write_data(0x30+wang); write_data(0x30+qian); write_data(0x30+bai); write_data(0x30+shi); write_com(0x80+0x0e); write_data(0x30+ge); } /* LcD初始化设定 */ void init() { bike_fm=bike_cm/10 ; q=0; su=0; tt=0; rw = 0; write_com(0x38); // 显示模式设置 write_com(0x0c); // 显示开关及光标设置 write_com(0x06); // 显示光标设置 write_com(0x01); // 显示清屏设置 TMOD=0X01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; TR0=1; ET0=1; EX0=1; IT0=1; EA=1; } void main() { init(); write_com(0x80+0x02); //write_com1(0x02); write_data(':'); write_com(0x80+0x05); write_data(':'); write_com(0x80+0x0f); write_data('m'); write_com(0x80+0x0d); write_data('.'); write_com(0x80+0x47); write_data('.'); write_com(0x80+0x40); for(num=0;num<4;num++) write_data(table[num]); write_com(0x80+0x4B ); for(num=0;num<4;num++) write_data(table1[num]); while(1) { lcd_sfm(0,hou); lcd_sfm(3,min); lcd_sfm(6,sec); lcd_sfm1(rate); lcd_sfm2(mile); } } //传感器中断 void time0() interrupt 0 { rate=72*bike_cm/su; if(q==2) mile+=bike_fm; su=0; if(q==0) q+=1; } //时钟中断 void isrtimer0() interrupt 1 { TL0=(65536-50000)%256; TH0=(65536-50000)/256; tt++; su++; if(q==1) {su=0; q+=1;} if(tt==20) { tt=0; sec++; if(sec==60) { min++; sec=0; if(min==60) { hou++; min=0; if(hou==10) hou=0; } } } }