LCD按键显示51单片机程序设计

#include#include#include #define uint unsigned int#define uchar unsigned charsbit lcdrs=P22;sbit lcdrw=P23;sbit lcde=P24;uchar num,key;int i,length1,length2,length3;uchar sting1=0903010;uchar sting2=hello;uchar sting3=happy;uchar getkey(void);void delayms(uchar j);void delay1ms(uint time);void lcdinit(void); void lcdsendc(uchar c); void lcdsendd(uchar c); void lcdbusy(void); void jumpkey(uchar k);void delayms(uchar j)uchar n,m;for(n=0;nj;n+)for(m=0;m120;m+);void lcdinit()delay1ms(100);lcde=0;lcdrs=1;lcdrw=1;lcdsendc(0x01); delay1ms(200);delay1ms(300);lcdsendc(0x3c); delay1ms(300);lcdsendc(0x06); delay1ms(200);lcdsendc(0x0c); delay1ms(200); void lcdsendc(uchar c) P1=c;lcdrs=0;lcdrw=0;lcde=0;lcde=1; void lcdsendd(uchar c)P1=c;lcdrs=1;lcdrw=0;lcde=0;lcde=1; void lcdbusy()uchar ma;lcdrs=0;lcdrw=1;lcde=1;ma=P1;if(ma&0x80=0x80)delay1ms(1); void delay1ms(uint time)uint i,j;for(i=0;itime;i+)for(j=0;j10;j+); uchar getkey(void) uchar rcode,ccode;P3=0xf0;if(P3&0xf0)!=0xf0)delayms(20); if(P3&0xf0)!=0xf0)rcode=0xfe; while(rcode&0x10)!=0)P3=rcode;if(P3&0xf0)!=0xf0)ccode=(P3&0xf0)|0x0f;while(P3&0xf0)!=0xf0); return(rcode)+(ccode);else rcode=(rcode1)|0x01; return 0; void jumpkey(uchar k) switch(k)case 0x11:num=1;break;case 0x21:num=2;break;case 0x41:num=3;break;default:break;main()uint i;lcdsendc(0x01);while(1) key=getkey(); delayms(20); jumpkey(key);switch(num)case 1: lcdsendc(0x01); lcdinit(); lcdsendc(0xc3); length1=strlen(sting1); for(i=0;i0;i-)delayms(50); lcdsendc(0x08);for(i=10;i0;i-) delayms(50);num=1;break;case 2: lcdsendc(0x01); lcdinit(); lcdsendc(0x80); length2=strlen(sting2); for(i=0;ilength2;i+) lcdsendd(sting2i);delay1ms(100); num=0; break; case 3 : lcdsendc(0x01); lcdinit(); lcdsendc(0xc0); length3=strlen