51单片机+LCD(LM1602)接口设计、编程及资料【免费下载】

#include<reg51.h> #include<intrins.h> #define uchar unsigned char uchar code seg[]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39,0x3a,0x20}; //ASC code #define DPORT P1 sbit RS = P2^5; sbit RW = P2^6; sbit EN = P2^7; uchar idata counter,s,m,h; void Delay_1ms(uchar j) { uchar i=0; for(;j>0;j--) { for(i=0;i<125;i++) {;} } } void Write_initialize(uchar c) { RS=0; RW=0; EN=1; DPORT = c; //将待写数据送到数据端口 _nop_(); _nop_(); Delay_1ms(20); EN=0; } void Write_Word(uchar c) { RS=1; RW=0; EN=1; DPORT = c; //将待写数据送到数据端口 _nop_(); _nop_(); Delay_1ms(20); EN=0; } void LcdPos(uchar xPos,uchar yPos) { uchar tmp; xPos&=0x0f; //x位置范围是0~15 yPos&=0x01; //y位置范围是0~1 if(yPos==0) //显示第1行 tmp=xPos; else tmp=xPos+0x40; //显示第2行 tmp|=0x80; Write_initialize(tmp); } void WriteChar(uchar c,uchar xPos,uchar yPos) { LcdPos(xPos,yPos); Write_Word(c); } void WriteString(uchar *s,uchar xPos,uchar yPos) { uchar i; if(*s==0) //遇到字符串结束 return; for(i=0;;i++) { if(*(s+i)==0) break; WriteChar(*(s+i),xPos,yPos); xPos++; if(xPos>=15) //如果XPOS中的值未到15（可显示的最多位） break; } } void SetCur() //设置光标 { Write_initialize(0x0c); //开显示有光标且闪烁 } void timer() interrupt 1 //中断子程序执行时间越短越好 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; counter++; if(counter==20) { s++; counter=0; if(s==60) { m++; s=0; if(m==60) { h++; m=0; if(h==24) h=0; } } } } main() { uchar i; uchar code shen[]={"****CLOCK****"},dian[]={":"}; uchar idata timercode[8]={0}; uchar *s1=shen,*s2=timercode,*s3=dian,p[10]; uchar xPos1=2,yPos1=0,xPos2,yPos2=1; TMOD=0x01; TH0=(65536-50000)/256; TL0=(65536-50000)%256; EA=1; ET0=1; TR0=1; PT0=1; Delay_1ms(15); Write_initialize(0x38); // 8BIT,2行,5X7字型 Write_initialize(0x08); // 关闭显示屏 Write_initialize(0x01); // 清除显示屏 Write_initialize(0x06); Write_initialize(0x0c); SetCur(); WriteString(s1,xPos1,yPos1); for(i=0;i<=15;i++) {Delay_1ms(200);} while(1) { *(p+7)=seg[s%10]; *(p+6)=seg[s/10]; *(p+4)=seg[m%10]; *(p+3)=seg[m/10]; *(p+1)=seg[h%10]; *p=seg[h/10]; s2=p; WriteString(s3,6,1); WriteString(s3,9,1); for(xPos2=4;xPos2<=15;xPos2++,s2++) WriteString(s2,xPos2,yPos2); //for(i=0;i<=5;i++) //{Delay_1ms(20);} } }