#include <reg52.h>
#define uchar unsigned char
#define unit unsigned int
#define OPdata P0 //十位數據口
#define OPdata1 P1//個位數據口
sbit se0=P3^6;//十位選擇
sbit se1=P3^7;//個位選擇
sbit Q=P2^6;
sbit W=P2^5;
sbit E=P2^4;
uchar cis; //按下鍵盤次數
uchar jia1; //加數1
uchar jia2; //加數2
uchar z; //中轉數
uchar shi; //十位數
uchar ge; //個位數
uchar s; //譯碼結果
uchar j; //譯碼結果
uchar sum; //加法結果
uchar keytemp;
void judge(uchar m) //數碼顯像管譯碼
{
switch (m)
{
case 0: s=0x3F; break;
case 1: s=0x06; break;
case 2: s=0x5B; break;
case 3: s=0x4F; break;
case 4: s=0x66; break;
case 5: s=0x6D; break;
case 6: s=0x7D; break;
case 7: s=0x07; break;
case 8: s=0x7F; break;
case 9: s=0x6F; break;
}
}
void judge1(uchar h) //十位數碼顯像管譯碼
{
switch (h)
{
case 0: j=0x3F; break;
case 1: j=0x06; break;
}
}
void judgecis()
{
if (cis==1)
{
jia1=z;
ge=z;
shi=0;
}
else if (cis==2)
{
jia2=z;
ge=z;
shi=0;
cis=0;
}
}
void jiafa(uchar m,uchar n) //加法
{
sum=m+n;
if (sum>=10)
{
ge=sum-10;
shi=1;
}
else
{
ge=sum;
shi=0;
}
}
void main()
{
cis=0;
jia1=0;
jia2=0;
shi=0;
ge=0;
s=0;
j=0;
P2=0XFF;
se0=0;//開啟十位
se1=0;//開啟個位
OPdata=0x3f;//十位
OPdata1=0x3f;//個位
while (1)
{
Q=0;
keytemp=P2;
switch (keytemp)
{
case 0xbb: z=3; cis++;while(P2==0xbb); break;
case 0xbd: z=6; cis++;while(P2==0xbd); break;
case 0xbe: z=9; cis++;while(P2==0xbe); break;
case 0xb7: //等於號
jiafa (jia1,jia2); cis=0; break;
}
Q=1;
W=0;
keytemp=P2;
switch (keytemp)
{
case 0xde: z=8; cis++;while(P2==0xde); break;
case 0xdd: z=5; cis++;while(P2==0xdd); break;
case 0xdb: z=2; cis++;while(P2==0xdb); break;
case 0xd7: z=0; cis++;while(P2==0xd7); break;
}
W=1;
E=0;
keytemp=P2;
switch (keytemp)
{
case 0xee: z=7; cis++;while(P2==0xee); break;
case 0xed: z=4; cis++;while(P2==0xed); break;
case 0xeb: z=1; cis++;while(P2==0xeb); break;
}
judgecis();
judge(ge);
OPdata1=s;
judge1(shi);
OPdata=j;
E=1;
}
}