zhong.txt

1． 利用单片机内部的T0

#include <absacc.h>
#include <reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define DISPLAY 0
#define SET1 1
#define SET2 2
#define SET3 3
#define ASET1 4
#define ASET2 5
#define ASET3 6
#define RUNMD  7
#define LED5 XBYTE [0xA000]   //数码管地址
#define LED6 XBYTE [0xA001]
#define LED7 XBYTE [0xA002]
#define LED8 XBYTE [0xA003]
#define LED1 XBYTE [0xA004]
#define LED2 XBYTE [0xA005]
#define LED3 XBYTE [0xA006]
#define LED4 XBYTE [0xA007]
#define KEY XBYTE [0xA100]  //键盘地址
/*扫描键盘使用的变量 */
sbit first_row = P1^4;      //键盘第一行控制
sbit second_row = P1^3;     //键盘第二行控制
bit first_getkey = 0,control_readkey = 0;  //读键盘过程中的标志位
bit getkey = 0; //获得有效键值标志位 等于1时代表得到一个有效键值
bit keyon = 0;  //防止按键冲突标志位
uchar keynum = 0;  //获得的有效按键值寄存器 
/*数码管显示使用的变量和常量*/
uchar lednum=0;  //数码管显示位控制寄存器
uchar daynum=0 ;
uchar work=0;
uchar code segtab[18]={0XC0,0XF9,0XA4,0XB0,0X99,0X92,0X82,0XF8,0X80,0X90,0X88,0X83,0XC6,0XA1,0X96,0X8E,0X8C,0XFF};             
typedef struct {
               char hour;
               char minute;
               char second;
               char day;
}time;
typedef struct {
               char minute;
               char second;
               char hsecond;
}RUN;
time  now ;
time  alam;
RUN   run;
void readkey(void);
void show(void);
void display(void);
unsigned char tick=0,mode=0,rick=0;
time now;
void intT0() interrupt 1 //T0 定时中断处理函数
{
	TH0 =0XD8;  //定时器中断时间间隔5ms
 	TL0 =0XF0;
tick++;
rick++;
if(tick==200)
{
tick=0;
now.second++;
if(now.second==60)
{
now.minute++;
now.second=0;
if(now.minute==60)
{
now.hour++;
now.minute=0;
if(now.hour==12)
{
now.hour=12;
if(now.day==10)
now.day=16;
else
now.day=10;
}
}
}
}
if((rick==2)&&(mode==7))
{
rick=0;
if(work==1)
{
run.hsecond++;
if(run.hsecond==100)
{
run.second++;
run.hsecond=0;
if(run.second==60)
{
run.minute++;
run.second=0;
if(run.minute==60)
{
run.minute=0;
}
}
}
}
if(work==0)
{
run.hsecond=0;
run.second=0;
run.minute=0;
work==2;
}
}
display();
 	if(control_readkey == 1)  //每两次定时中断扫描一次键盘
   	{
    	readkey();
   	}
 	control_readkey = !control_readkey;
}
void show(void)
{
if(keynum==0X00)
{
mode++;
if(mode==8)
mode=0;
}
switch(mode)
{
case DISPLAY:// 设置显示模式 
switch(lednum)
{
case 0: LED5=segtab[now.second%10];
break;
case 1: LED6=segtab[now.second/10];
break;
case 2: LED7=segtab[now.minute%10];
break;
case 3: LED8=segtab[now.minute/10];
break;
case 4: LED1=segtab[now.hour%10];
break;
case 5: LED2=segtab[now.hour/10];
break;
case 6: LED3=segtab[now.day];
break;
}
break;
case SET1://设置分针
if(keynum==0X01)
{
now.minute++;
if(now.minute==60)
now.minute=0;
}
if(keynum==0X02)
{
now.minute--;
if(now.minute==-1)
now.minute=59;
}
break;
case SET2://设置时针
if(keynum==0X01)
{
now.hour++;
if(now.hour==13)
now.hour=1;
}
if(keynum==0X02)
{
now.hour--;
if(now.hour==0)
now.hour=12;
if(now.hour==-1)
now.hour=12;
}
break;
case SET3://设置昼夜
if(keynum==0X01)
now.day=10;
if(keynum==0X02)
now.day=16;
break;
case ASET1://设置闹钟昼夜
if(keynum==0X01)
{
alam.minute++;
if(alam.minute==60)
alam.minute=0;
}
if(keynum==0X02)
{
alam.minute--;
if(alam.minute==-1)
alam.minute=59;
}
break;
case ASET2://设置闹钟时针
if(keynum==0X01)
{
alam.hour++;
if(alam.hour==13)
alam.hour=1;
}
if(keynum==0X02)
{
alam.hour--;
if(alam.hour==0)
alam.hour=12;
if(alam.hour==-1)
alam.hour=12;
}
break;
case ASET3://设置闹钟昼夜
if(keynum==0X01)
alam.day=10;
if(keynum==0X02)
alam.day=16;
break;
case RUNMD://跑表工作模式
if(keynum==0X01)
work++;
if(work==3)
work=1;
if(keynum==0X02)
work=0;
break;
}
if(lednum == 0) //更新需要现实的数码位
 	{
		lednum = 8;
 	}
 	else
 	{
		lednum = lednum-1;
	}
}
void display(void)
{
switch(mode)
{
case DISPLAY://显示模式 

switch(lednum)
{
case 0: LED5=segtab[now.second%10];
break;
case 1: LED6=segtab[now.second/10];
break;
case 2: LED7=segtab[now.minute%10];
break;
case 3: LED8=segtab[now.minute/10];
break;
case 4: LED1=segtab[now.hour%10];
break;
case 5: LED2=segtab[now.hour/10];
break;
case 6: LED3=segtab[now.day];
break;
case 7: if((alam.hour==now.hour)&&(alam.minute==now.minute)&&(alam.day==now.day)&&(now.second<30)&&(now.second%2))  LED4=segtab[8];
        else LED4=0XFF;
break;
}
break;
case SET1://显示设置分针
switch(lednum)
{
case 0: LED5=segtab[now.second%10];
break;
case 1: LED6=segtab[now.second/10];
break;
case 2: if(now.second%2) LED7=segtab[now.minute%10];
        else LED7=0XFF;
break;
case 3: if(now.second%2) LED8=segtab[now.minute/10];
         else LED8=0XFF;
break;
case 4: LED1=segtab[now.hour%10];
break;
case 5: LED2=segtab[now.hour/10];
break;
case 6: LED3=segtab[now.day];
break;
}
break;
case SET2://显示设置时针
switch(lednum)
{
case 0: LED5=segtab[now.second%10];
break;
case 1: LED6=segtab[now.second/10];
break;
case 2: LED7=segtab[now.minute%10];    
break;
case 3: LED8=segtab[now.minute/10];       
break;
case 4: if(now.second%2) LED1=segtab[now.hour%10];
        else LED1=0XFF;
break;
case 5: if(now.second%2) LED2=segtab[now.hour/10];
        else LED2=0XFF;
break;
case 6: LED3=segtab[now.day];
break;
}
break;
case SET3://显示设置昼夜
switch(lednum)
{
case 0: LED5=segtab[now.second%10];
break;
case 1: LED6=segtab[now.second/10];
break;
case 2: LED7=segtab[now.minute%10];
break;
case 3: LED8=segtab[now.minute/10];        
break;
case 4: LED1=segtab[now.hour%10];
break;
case 5: LED2=segtab[now.hour/10];
break;
case 6: if(now.second%2) LED3=segtab[now.day];
         else LED3=0XFF;
break;
}
break;
case ASET1://显示设置闹钟分针
switch(lednum)
{
case 0: LED5=segtab[0];
break;
case 1: LED6=segtab[0];
break;
case 2: if(now.second%2) LED7=segtab[alam.minute%10];
        else LED7=0XFF;
break;
case 3: if(now.second%2) LED8=segtab[alam.minute/10];
         else LED8=0XFF;
break;
case 4: LED1=segtab[alam.hour%10];
break;
case 5: LED2=segtab[alam.hour/10];
break;
case 6: LED3=segtab[alam.day];
break;
}
break;
case ASET2://显示闹钟设置时针
switch(lednum)
{
case 0: LED5=segtab[0];
break;
case 1: LED6=segtab[0];
break;
case 2: LED7=segtab[alam.minute%10];    
break;
case 3: LED8=segtab[alam.minute/10];       
break;
case 4: if(now.second%2) LED1=segtab[alam.hour%10];
        else LED1=0XFF;
break;
case 5: if(now.second%2) LED2=segtab[alam.hour/10];
        else LED2=0XFF;
break;
case 6: LED3=segtab[alam.day];
break;
}
break;
case ASET3://显示闹钟设置昼夜
switch(lednum)
{
case 0: LED5=segtab[0];
break;
case 1: LED6=segtab[0];
break;
case 2: LED7=segtab[alam.minute%10];
break;
case 3: LED8=segtab[alam.minute/10];        
break;
case 4: LED1=segtab[alam.hour%10];
break;
case 5: LED2=segtab[alam.hour/10];
break;
case 6: if(now.second%2) LED3=segtab[alam.day];
         else LED3=0XFF;
break;
}
break;
case RUNMD :// 显示跑表模式
if(work==0)
{
switch(lednum)
{
case 0: LED5=segtab[0];
break;
case 1: LED6=segtab[0];
break;
case 2: LED7=segtab[0];
break;
case 3: LED8=segtab[0];
break;
case 4: LED1=segtab[0];
break;
case 5: LED2=segtab[0];
break;
}
}
else
{ 
switch(lednum)
{
case 0: LED5=segtab[run.hsecond%10];
break;
case 1: LED6=segtab[run.hsecond/10];
break;
case 2: LED7=segtab[run.second%10];
break;
case 3: LED8=segtab[run.second/10];
break;
case 4: LED1=segtab[run.minute%10];
break;
case 5: LED2=segtab[run.minute/10];
break;
}
}
break;
}
if(lednum == 0) //更新需要现实的数码位
 	{
		lednum = 8;
 	}
 	else
 	{
		lednum = lednum-1;
	}
}
void main(void)
{    
alam.hour=1;
	TMOD = 0x01;    //
 	TH0 =0XD8;  //定时器中断时间间隔 5ms
 	TL0 = 0XF0;
	TCON = 0x10;
 	ET0 = 1;
 	EA = 1;
        while(1)
{
if(getkey==1)
{
show();
getkey=0;
}
}
}
/***************************************************
			键盘扫描函数
原型:   void readkey(void);
功能:  当获得有效按键时,令getkey=1，keynum为按键值

****************************************************/
void readkey(void)
{
	uchar M_key = 0;  

 	first_row = 0;
 	second_row = 0;
 	M_key = KEY;
 	if(M_key != 0xff)  //如果有连续两次按键按下，认为有有效按键按下。消除按键抖动
   	{
    		if(first_getkey == 0)
     		{
   			first_getkey = 1;	
   		}
  		else    //当有有效按键按下时，进一步识别是哪一个按键
   		{
   			if(keyon == 0)  //防止按键冲突，当还有未释放的按键时不对其它按键动作响应   
   			{
      				first_row = 0;         //扫描第一行按键
      				second_row = 1;
         			M_key = KEY;
         			if(M_key != 0xff)
           			{
            				switch(M_key) 
            				{	
            	 				case 0xfe:
                   					keynum = 0x00;
               						break;
            					case 0xfd:
                       					keynum = 0x01;
                 					break;
               					case 0xfb:
                 		    			keynum = 0x02;
                 					break;
               					case 0xf7:
                      					keynum = 0x03;
                 					break;
               					case 0xef:
                 					keynum = 0x04;
                 					break;
               					case 0xdf:
                 					keynum = 0x05;
                					break;
               					case 0xbf:
                					keynum = 0x06;
                 					break;
              	 				case 0x7f:
                 					keynum = 0x07;
                 					break;
              				}
           			}
         			else
           			{
            				second_row = 0;     //扫描第二行按键
            				first_row = 1;
            				M_key = KEY;
            				switch(M_key)
              				{
               					case 0xfe:
                					keynum = 0x08;
                					break;
               					case 0xfd:
                 					keynum = 0x09;
                 					break;
               					case 0xfb:
                 					keynum = 0x0a;
                 					break;
               					case 0xf7:
                 					keynum = 0x0b;
                 					break;
               					case 0xef:
                 					keynum = 0x0c;
                 					break;
               					case 0xdf:
                 					keynum = 0x0d;
                 					break;
               					case 0xbf:
                 					keynum = 0x0e;
                 					break;
               					case 0x7f:
                 					keynum = 0x0f;
                 					break;
              				}
           			}
				getkey = 1; //获得有效按键数值
                		keyon = 1;  //防止按键冲突，当获得有效按键时将其置1
        		} 
     		} 
   	}
 	else
   	{
    		first_getkey = 0;
    		keyon = 0;     //防止按键冲突，当所有的按键都释放时将其清0
    	}
}