基于PIC的1602液晶屏应用

#include <pic.h> #define uchar unsigned char #define uint unsigned int #define DATA PORTD #define rs RA1 #define rw RA2 #define en RA3 void disp(); int sec=50,min=54,hour=03; uchar MODE; bit flag; uchar tab[]={"time---00:00:00"}; void delay(uchar i) { uchar j; for(;i>0;i--) for(j=220;j>0;j--); } void write_com(uchar com) //写入命令 { rw=0; rs=0; DATA=com; delay(10); en=1; delay(10); en=0; } void write_dat(uchar dat) //写入数据 { rw=0; rs=1; DATA=dat; delay(10); en=1; delay(10); en=0; } void lcd_init() //初始化 { uchar n; TRISD=0x00; TRISA=0x00; en=0; write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01); } void interrupt timer1() { static js; if(TMR1IF==1) { TMR1IF=0; TMR1H=(65536-50000)/256; TMR1L=(65536-50000)%256; js++; if(js==80) { js=0; sec++; if(sec>=60) { sec=0;min++; if(min>=60) { min=0;hour++;flag=1; if(hour>=24) { hour=0; } } } disp(); } } } void zhhu() { tab[7]=hour/10+0x30; tab[8]=hour%10+0x30; tab[10]=min/10+0x30; tab[11]=min%10+0x30; tab[13]=sec/10+0x30; tab[14]=sec%10+0x30; } void keyscan() { if(RC0==0) { delay(10); if(RC0==0) { TMR1ON=0; MODE++; while(!RC0); sec=0; // write_com(0x0e); if(MODE>=3) MODE=0; } } while(MODE) { zhhu(); disp(); if(RC0==0) { delay(10); if(RC0==0) { MODE++; while(!RC0); if(MODE>=3) MODE=0; } } switch(MODE) { case 0x01: write_com(0xc8); write_com(0x0e);delay(250);write_com(0x0c); break; case 0x02: write_com(0xcb); write_com(0x0e);delay(250);write_com(0x0c); break; default : break; } if((RC1==0)&&(MODE==1)) //时调整 { hour++; if(hour>=24) hour=0; } if((RC2==0)&&(MODE==1)) //时调整 { hour--; if(hour<0) hour=23; } if((RC1==0)&&(MODE==2)) //分调整 { min++; if(min>=60) min=0; } if((RC2==0)&&(MODE==2)) //分调整 { min--; if(min<0) min=59; } } //write_com(0x0c); TMR1ON=1; } void disp() { uchar i; zhhu(); write_com(0xc0); rw=0; for(i=0;i<15;i++) { write_dat(tab[i]) ; delay(10); } } void baoshi() { uchar di_num; for(di_num=hour;di_num>0;di_num--) { RC7=1; delay(200); delay(200); delay(200); RC7=0; delay(200); delay(200); } flag=0;RC7=0; } void main() { ADCON1=0X06; TRISC=0x0f; TMR1ON=1; TMR1IE=1; GIE=1; PEIE=1; RC7=0; TMR1H=(65536-50000)/256; TMR1L=(65536-50000)%256; lcd_init(); while(1) { keyscan(); if(flag) {flag=0;baoshi();} } }