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#include <reg51.h>
#include <intrins.h>
typedef unsigned char U8;
typedef unsigned int U16;
U8 code table[]={0xc0,0xf9,0xa4,0xb0,
0x99,0x92,0x82,0xf8,
0x80,0x90,0x88,0x83,
0xc6,0xa1};
sbit P2_0 = P2^0 ;
U8 U8FLAG,U8temp;
U8 shidu_shi,shidu_ge,wendu_shi,wendu_ge;
U8 U8T_data_H,U8T_data_L,U8RH_data_H,U8RH_data_L,U8checkdata;
U8 U8T_data_H_temp,U8T_data_L_temp,U8RH_data_H_temp,U8RH_data_L_temp,U8checkdata_temp;
U8 U8comdata;
void Delay(U16 z)
{
U8 x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void Delay_10us(void)
{
U8 i;
i--;
i--;
i--;
i--;
i--;
i--;
}
void COM(void)
{
U8 i;
for(i=0;i<8;i++)
{
U8FLAG=2;
while((!P2_0)&&U8FLAG++);
Delay_10us();
Delay_10us();
Delay_10us();
U8temp=0;
if(P2_0)U8temp=1;
U8FLAG=2;
while((P2_0)&&U8FLAG++);
if(U8FLAG==1)break;
U8comdata<<=1;
U8comdata|=U8temp;
}
}
void display(U8 shidu_shi,U8 shidu_ge,U8 wendu_shi,U8 wendu_ge)
{
P2=0xff;
P2=0xbf;
P0=table[shidu_shi];
Delay(5);
P2=0xff;
P2=0xdf;
P0=table[shidu_ge];
Delay(5);
P2=0xff;
P2=0xfb;
P0=table[wendu_shi];
Delay(5);
P2=0xff;
P2=0xfd;
P0=table[wendu_ge];
Delay(5);
}
void RH(void)
{
P2_0=0;
Delay(34);
P2_0=1;
Delay_10us();
Delay_10us();
Delay_10us();
Delay_10us();
P2_0=1;
if(!P2_0)
{
U8FLAG=2;
while((!P2_0)&&U8FLAG++);
U8FLAG=2;
while((P2_0)&&U8FLAG++);
COM();
U8RH_data_H_temp=U8comdata;
COM();
U8RH_data_L_temp=U8comdata;
COM();
U8T_data_H_temp=U8comdata;
COM();
U8T_data_L_temp=U8comdata;
COM();
U8checkdata_temp=U8comdata;
P2_0=1;
U8temp=(U8T_data_H_temp+U8T_data_L_temp+U8RH_data_H_temp+U8RH_data_L_temp);
if(U8temp==U8checkdata_temp)
{
U8RH_data_H=U8RH_data_H_temp;
U8RH_data_L=U8RH_data_L_temp;
U8T_data_H=U8T_data_H_temp;
U8T_data_L=U8T_data_L_temp;
U8checkdata=U8checkdata_temp;
}
shidu_shi=U8T_data_H/10;
shidu_ge=U8T_data_H%10;
wendu_shi=U8RH_data_H/10;
wendu_ge=U8RH_data_H%10;
}
display(shidu_shi,shidu_ge,wendu_shi,wendu_ge);
}
void main()
{
while(1)
{
RH();
}
}
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