1、精品文檔按 4X4 鍵盤的 F 鍵 進入設定狀態/E D 鍵是前后移動鍵/C 按鍵是調整數值按鍵#include reg52.h#define uchar unsigned charsbit RS=P10;sbit RW=P11;sbit E=P12;bit at=0;uchar code shen=CLOCK!;uchar code word=0 x30,0 x31,0 x32,0 x33,0 x34,0 x35,0 x36,0 x37,0 x38,0 x39,0 x3a,0 x20; uchar dispbuf8,h,m,s,counter;void delay()uchar i;for(

2、i=0;i255;i+);/*寫命令 */void lcd_wmc(uchar i)P0=i;RS=0;RW=0;E=0;delay();E=1;/*寫數據 */void lcd_wmd(uchar i)P0=i;RS=1;RW=0;E=0;精品文檔精品文檔delay();E=1;/*初始化液晶 */void lcd_init()uchar i;lcd_wmc(0 x01);lcd_wmc(0 x38);lcd_wmc(0 x0c);lcd_wmc(0 x06);lcd_wmc(0 xc9);for(i=0;i6;i+)lcd_wmd(sheni);lcd_wmc(0 xc0);/*更新緩沖區

3、子程序*/void newbuf()dispbuf0=s%10;dispbuf1=s/10;dispbuf3=m%10;dispbuf4=m/10;dispbuf6=h%10;dispbuf7=h/10;/*顯示子程序 */void disp(uchar dispadd)uchar tmp;lcd_wmc(dispadd);tmp=dispbuf7;精品文檔精品文檔tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf6;tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf5;tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf4;tm

4、p=wordtmp;lcd_wmd(tmp);tmp=dispbuf3;tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf2;tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf1;tmp=wordtmp;lcd_wmd(tmp);tmp=dispbuf0;tmp=wordtmp;lcd_wmd(tmp);/*鍵盤子程序 */uchar keypro(void)uchar scanl,scanh;P2=0 x0f;/ 先將所有行線拉低if(P2&0 x0f)!=0 x0f) /如果列線有變化delay();/ 延遲一段時間。if(P2&0 x0f)!=

5、0 x0f)/ 如果此時此刻列線還有變化，說明確實有按鍵按下scanl=0 xfe;while(scanl&0 x10)!=0)P2=scanl; / 給 P1 口賦掃描碼 ,每次只拉低一行精品文檔精品文檔if(P2&0 xf0)!=0 xf0) / 如果判斷為真 ,則說明找到了按鍵按下的行scanh=(P2&0 xf0)|0 x0f; / 計算識別碼return (scanh)+(scanl);else scanl=(scanl1)|0 x01; / 否則依次將第二，第三，第四行拉低return 0;/ 沒有按鍵按下返回 0/*時間調整子程序*/void adjustime()uchar k

6、;static uchar add;k=keypro();switch(k)case 0 x88: if(!at)add=0 xc1;EA=0;lcd_wmc(0 xc1);lcd_wmc(0 x0f);at=1; else lcd_wmc(0 xc0);lcd_wmc(0 x0c);at=0;EA=1; break;case 0 x48:if(at)if(add=0 xc1)add=0 xc7; lcd_wmc(add);else add=add-3;lcd_wmc(add);break;case 0 x28:if(at)if(add=0 xc7) add=0 xc1;lcd_wmc(add

7、);else add=add+3;lcd_wmc(add);break;case 0 x18: if(at)if(add=0 xc1) h+;if(h=24)h=0;精品文檔精品文檔if(add=0 xc4) m+;if(m=60)m=0;if(add=0 xc7) s+;if(s=60)s=0;newbuf();disp(0 xc0);lcd_wmc(add);break;default: break;if(k!=0)while(P1&0 xf0)!=0 xf0)P1=0 xf0;/*初始化子程序*/void init()TMOD=0 x01;TH0=0 x4c;TL0=0 x00;EA=1

8、;ET0=1;TR0=1;counter=0;h=12;m=0;s=0;dispbuf2=10;dispbuf5=10;精品文檔精品文檔/*主程序 */void main(void)init();lcd_init();while(1)adjustime();if(!at)閃爍if(counter10)dispbuf2=10;dispbuf5=10;elsedispbuf2=11;dispbuf5=11;更新顯示緩沖區及調用顯示程序if(counter=0)newbuf();disp(0 xc0);else if(counter=10)disp(0 xc0);精品文檔精品文檔/*定時器 0 的中斷 */void Time0() interrupt 1 using 2/ 再次強調中斷子程序執行時間越短