基于STC89C51的数字时钟

/*************************************************** 键盘扫描源文件（.C） **************************************************/ #include"define.h" //函数申明头文件包含 #include<reg52.h> //包含52头文件 extern uchar table1[],table2[],table3[],table4[],table8[]; //全局调用变量 sbit key_set_time=P0^7; //设置时间键位定义 sbit key_up=P0^6; //上加键位定义 sbit key_down=P0^3; //下减键位定义 sbit key_back=P0^5; sbit key_set_alarm=P0^4; uchar flag_time,count_time; //申明标志位，计数值变量 uchar flag_alarm,count_alarm,flag_set_alarm,alarm_shi,alarm_fen; /*************************************************** 键盘扫描函数 **************************************************/ void time_keyscan(void) { uchar nian,zhou,yue,ri,shi,fen; if(key_set_time==0) { delay_1ms(5); //消抖 if(key_set_time==0) { display(0x94,"00"); write_lcd_comd(0x0e); //开光标并闪烁 count_time++; //计数 flag_time=1; //标志位置位 while(!key_set_time); //松手检测 write_1302(0x8e,0x00); //关写保护 write_1302(0x80,0x80); //停止时钟 write_1302(0x8e,0x80); //开写保护 } } if(count_time!=0) { switch(count_time) { case 1: display(0x90,""); //光标移至“时”调节位 if(key_up==0) { delay_1ms(5); //消抖 if(key_up==0) { write_1302(0x8e,0x00); //关写保护 shi=read_1302(0x85); //读取此刻“时”时值 shi++; //“时”加一 if(shi==24) //判断是否溢出 shi=0; while(!key_up); //松手检测 write_1302(0x84,shi); table2[0]=read_1302(0x85)/10+0x30; //读取调节后“时”的个位 table2[1]=read_1302(0x85)%10+0x30; //读取调节后“时”的十位 display(0x90,table2); //显示在LCD12864上 display(0x94,"00"); write_1302(0x8e,0x80); //打开写保护 } } if(key_down==0) { delay_1ms(5); //消抖 if(key_down==0) { write_1302(0x8e,0x00); //关写保护 shi=read_1302(0x85); //读取此刻“时”的值 shi--; //“时”减一 if(shi==-1) //判断是否溢出 shi=23; while(!key_down); //松手检测 write_1302(0x84,shi); //“时”调节后送回时钟 table2[0]=read_1302(0x85)/10+0x30; //读取调节后“时”的个位 table2[1]=read_1302(0x85)%10+0x30; //读取调节后“时”的十位 display(0x90,table2); //显示在LCD12864上 display(0x94,"00"); write_1302(0x8e,0x80); //打开写保护 } } if(key_back==0) //调时复位 { delay_1ms(5); if(key_back==0) { count_time=0; flag_time=0; //计数值清零，标志位复位 write_1302(0x8e,0x00); //关写保护 write_1302(0x80,0x00); //开时钟 write_1302(0x8e,0x80); //开写保护 write_lcd_comd(0x0c); //关光标 } } break; //跳出 case 2: /**************以下调节方式同“时”调节*******************/ display(0x92,""); if(key_up==0) { delay_1ms(5); if(key_up==0) { write_1302(0x8e,0x00); fen=read_1302(0x83); fen++; if(fen==60) fen=0; while(!key_up); write_1302(0x82,fen); table2[4]=read_1302(0x83)/10+0x30; table2[5]=read_1302(0x83)%10+0x30; display(0x90,table2); display(0x94,"00"); write_1302(0x8e,0x80); } } if(key_down==0) { delay_1ms(5); if(key_down==0) { write_1302(0x8e,0x00); fen=read_1302(0x83); fen--; if(fen==-1) fen=59; while(!key_down); write_1302(0x82,fen); table2[4]=read_1302(0x83)/10+0x30; table2[5]=read_1302(0x83)%10+0x30; display(0x90,table2); display(0x94,"00"); write_1302(0x8e,0x80); } } if(key_back==0) //调时复位 { delay_1ms(5); if(key_back==0) { count_time=0; flag_time=0; //计数值清零，标志位复位 write_1302(0x8e,0x00); //关写保护 write_1302(0x80,0x00); //开时钟 write_1302(0x8e,0x80); //开写保护 write_lcd_comd(0x0c); //关光标 } } break; case 3: display(0x89,""); if(key_up==0) { delay_1ms(5); if(key_up==0) { write_1302(0x8e,0x00); nian=read_1302(0x8d); nian++; if(nian==100) nian=0; while(!key_up); write_1302(0x8c,nian); table3[2]=read_1302(0x8d)/10+0x30; table3[3]=read_1302(0x8d)%10+0x30; display(0x88,table3); write_1302(0x8e,0x80); } } if(key_down==0) { delay_1ms(5); if(key_down==0) { write_1302(0x8e,0x00); nian=read_1302(0x8d); nian--; if(nian==-1) nian=99; while(!key_down); write_1302(0x8c,nian); table3[2]=read_1302(0x8d)/10+0x30; table3[3]=read_1302(0x8d)%10+0x30; display(0x88,table3); write_1302(0x8e,0x80); } } if(key_back==0) //调时复位 { delay_1ms(5); if(key_back==0) { count_time=0; flag_time=0; //计数值清零，标志位复位 write_1302(0x8e,0x00); //关写保护 write_1302(0x80,0x00); //开时钟 write_1302(0x8e,0x80); //开写保护 write_lcd_comd(0x0c); //关光标 } } break; case 4: display(0x8b,""); if(key_up==0) { delay_1ms(5); if(key_up==0) { write_1302(0x8e,0x00); yue=read_1302(0x89); yue++; if(yue==13) yue=1; while(!key_up); write_1302(0x88,yue); table3[6]=read_1302(0x89)/10+0x30; table3[7]=read_1302(0x89)%10+0x30; display(0x88,table3); write_1302(0x8e,0x80); } } if(key_down==0) { delay_1ms(5); if(key_down==0) { write_1302(0x8e,0x00); yue=read_1302(0x89); yue--; if(yue==0) yue=12; while(!key_down); write_1302(0x88,yue); table3[6]=read_1302(0x89)/10+0x30; table3[7]=read_1302(0x89)%10+0x30; display(0x88,table3); write_1302(0x8e,0x80); } } if(key_back==0) //调时复位 { delay_1ms(5); if(key_back==0) { count_time=0; flag_time=0; //计数值清零，标志位复位 write_1302(0x8e,0x00); //关写保护 write_1302(0x80,0x00); //开时钟 write_1302(0x8e,0x80); //开写保护 write_lcd_comd(0x0c); //关光标 } } break; case 5: display(0x8d,""); if(key_up==0) { delay_1ms(5); if(key_up==0) { write_1302(0x8e,0x00); ri=read_1302(0x87); ri++; if(ri==32) ri=1; while(!key_up); write_1302(0x86,ri); table3[10]=read_1302(0x87)/10+0x30; table3[11]=read_1302(0x87)%10+0x30; display(0x88,table3); write_1302(0x8e,0x80); } } if(key_down==0) { delay_1ms(5); if(key_down==0) { write_1302(0x8e,0x00); ri=read_1302(0x87); ri--; if(ri==0) ri=31;