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C51单片机六位数码管时钟 用数码管dot分隔时分秒 用三个按键设置时间： SET键：小时设定->分钟设定->结束设定，小时设定状态时表示小时的两位数码管闪烁，分钟设定时表示分钟的两位数码管闪烁 CHANGE键：在小时设定状态和分钟设定状态改变数值 SET S键：秒置零
C语言代码： //main.c - #include <REGX52.H>
- typedef unsigned int UINT ;
- typedef unsigned char UCHAR ;
- #define KEY P2
- #define KEYMASK 0x07
- sbit LE1 = P2^6; //定义位控口
- sbit LE2 = P2^7; //定义段控口
- UCHAR KeyPressDown = 0x00;
- UCHAR KeyRelease = 0x00;
- UCHAR LastKey = 0x00;
- UCHAR MODE ;
- extern UCHAR HH;
- extern UCHAR MM;
- extern UCHAR SS;
- extern bit T_CYCLE ;
- extern void T0_Init(void); //初始化定时器，函数定义在Timer.c
- UCHAR code NUM[] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
- void delay(UINT t) //延时t时钟周期
- {
- while (t--) ;
- }
- void H_Increase(void) //小时增1
- {
- if(HH<23) HH++;
- else
- {
- HH = 0;
- }
- }
- void M_Increase(void) //分钟增1
- {
- if(MM<59) MM++;
- else
- {
- MM = 0;
- H_Increase();
- }
- }
- void S_Increase(void) //秒增1
- {
- if(SS<59) SS++;
- else
- {
- SS = 0;
- M_Increase();
- }
- }
- void display(UCHAR SEG,UCHAR Digi) //显示一位数码管，SEG = 0-9数字，Digi = 第0-6位
- {
- LE2 = 1;
- P0 = (0x01<<Digi) ;
- LE2 = 0;
- P0 = 0x00;
- LE1 = 1;
- P0 = NUM[SEG];
- if (Digi==1||Digi==3) P0 &= 0x7f ; //显示分隔符
- delay(50);
- P0 = 0xff;
- LE1 = 0;
- }
- void main(void)
- {
- P0 = 0xff;
- LE1 = 0;
- LE2 = 0;
- T0_Init();
- while(1)
- {
- if(MODE != 1 || T_CYCLE)
- {
- display(HH/10,0); //显示小时十位数
- display(HH%10,1); //显示小时个位数
- }
- if(MODE != 2 || T_CYCLE)
- {
- display(MM/10,2); //显示分钟十位数
- display(MM%10,3); //显示分钟个位数
- }
- display(SS/10,4); //显示秒十位数
- display(SS%10,5); //显示秒个位数
- }
- }
- void key_Process(void) //按键处理程序
- {
- UCHAR CurrKey;
- KEY |= KEYMASK; //将按键对应的IO设置为输入状态
- CurrKey = (~KEY) & KEYMASK;
-
- KeyPressDown = (~LastKey) & CurrKey;
- KeyRelease = LastKey & (~CurrKey);
-
- LastKey = CurrKey;
- switch(KeyRelease)
- {
- case 1:
- if(MODE == 2) MODE = 0;
- else MODE ++;
- break;
- case 2:
- if(MODE == 1) H_Increase() ;
- if(MODE == 2) M_Increase() ;
- break;
- case 4:
- SS = 0;
- break;
- default: break;
- }
- }
- //Timer#include <reg52.h>
- typedef unsigned int UINT ;
- typedef unsigned char UCHAR ;
- UCHAR HH = 14; //小时初始值
- UCHAR MM = 2; //分钟初始值
- UCHAR SS = 55; //秒初始值
- UINT u_10ms = 0; //10ms计数
- bit T_CYCLE = 0;
- extern void key_Process(void);
- extern void S_Increase(void);
- void T0_Init(void)
- {
- TMOD &= 0xf0;
- TMOD |= 0x01;
- //定时器赋初始值，定时时间为10ms。
- TH0 = 0xd8;
- TL0 = 0xf0;
- TR0 = 1;
- IE = 0x82;
- }
- void T0_INTSrv(void) interrupt 1
- {
- //定时器重新开始计时。
- TH0 = 0xd8;
- TL0 = 0xf0;
- u_10ms ++;
- if (u_10ms%20==0) // 200 ms
- {
- T_CYCLE = ! T_CYCLE; //闪烁循环
- }
- if (u_10ms>99) // 1000 ms = 1 second
- {
- u_10ms = 0;
- S_Increase();
- }
- key_Process(); //SET按键处理
- }
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