#include <reg52.h>
int local(unsigned int i);
unsigned int locals = 0;
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
sbit key1 = P2^4;
sbit key2 = P2^5;
sbit key3 = P2^6;
unsigned char leds[] = {0xC0,0xF9,0xA4,0xB0,0x99,
0x92,0x82,0xF8,0x80,0x90 };
unsigned char ledss[10][8]={ {0xAA,0x55,0xAA,0x55,0xAA,0x55,0xAA,0x55},
{0xE7,0xE3,0xE7,0xE7,0xE7,0xE7,0xE7,0xC3},
{0x81,0x81,0x9F,0x81,0x81,0xF9,0x81,0x81},
{0x81,0x81,0x9F,0x81,0x81,0x9F,0x81,0x81},
{0x8F,0x87,0x93,0x99,0x9C,0x00,0x00,0x9F},
{0x81,0x81,0xF9,0x81,0x81,0x9F,0x81,0x81},
{0x81,0x81,0xF9,0x81,0x81,0x99,0x81,0x81},
{0x83,0x83,0x9F,0x9F,0x9F,0x9F,0x9F,0x9F},
{0x81,0x81,0x99,0x81,0x81,0x99,0x81,0x81},
{0x81,0x81,0x99,0x81,0x81,0x9F,0x81,0x81}, };
void main()
{
ADDR3 = 0;
ENLED = 0;
EA = 1;
TMOD = 0x01;
ET0 = 1;
TH0 = 0xFC;
TL0 = 0x67;
TR0 = 1;
//開啟九位輸入鍵，其它鍵關閉
P2 = 0xF1;
while(1)
{
//得到鍵位所在KeyIn1輸入列
if(key1==0)
{
locals = local(1);
TR0 = 1;
}
//得到鍵位所在KeyIn2輸入列
else if(key2==0)
{
locals = local(2);
TR0 = 1;
}
//得到鍵位所在KeyIn3輸入列
else if(key3==0)
{
locals = local(3);
TR0 = 1;
}
}
//對應鍵位賦值數碼管
}
void InterruptTimer0() interrupt 1
{
static unsigned char i = 0;
TH0 = 0xFC; // 1ms
TL0 = 0x67;
P0 = 0xFF;
ADDR3 = 0;
switch(i)
{ case 0: ADDR0 = 0;ADDR1 = 0;ADDR2 = 0; P0 = ledss[locals][i];i++;break;
case 1: ADDR0 = 1;ADDR1 = 0;ADDR2 = 0; P0 = ledss[locals][i];i++;break;
case 2: ADDR0 = 0;ADDR1 = 1;ADDR2 = 0; P0 = ledss[locals][i];i++;break;
case 3: ADDR0 = 1;ADDR1 = 1;ADDR2 = 0; P0 = ledss[locals][i];i++;break;
case 4: ADDR0 = 0;ADDR1 = 0;ADDR2 = 1; P0 = ledss[locals][i];i++;break;
case 5: ADDR0 = 1;ADDR1 = 0;ADDR2 = 1; P0 = ledss[locals][i];i++;break;
case 6: ADDR0 = 0;ADDR1 = 1;ADDR2 = 1; P0 = ledss[locals][i];i++;break;
case 7: ADDR0 = 1;ADDR1 = 1;ADDR2 = 1; P0 = ledss[locals][i];i++;break;
case 8: ADDR3 = 1;ADDR0 = 0;ADDR1 = 0;ADDR2 = 0; P0 = leds[locals];i++;break;
case 9: ADDR3 = 1;ADDR0 = 1;ADDR1 = 0;ADDR2 = 1; P0 = leds[locals];i=0;break;
default: break; //代表無此類情況，跳出
}
}
int local(unsigned int i)
{
unsigned int b;
//判斷當前鍵位
switch(i)
{
//得到鍵位所在KeyIn1輸入列
case 1: P2 = 0xF7; //僅僅開啟out1
if(key1 == 0){ b = 1; }
P2 = 0xFB; //僅僅開啟out2
if(key1 == 0){ b = 4; }
P2 = 0xFD; //僅僅開啟out3
if(key1 == 0){ b = 7; }
break;
//得到鍵位所在KeyIn2輸入列
case 2: P2 = 0xF7; //僅僅開啟out1
if(key2 == 0){ b = 2; }
P2 = 0xFB; //僅僅開啟out2
if(key2 == 0){ b = 5; }
P2 = 0xFD; //僅僅開啟out3
if(key2 == 0){ b = 8; }
break;
//得到鍵位所在KeyIn3輸入列
case 3: P2 = 0xF7; //僅僅開啟out1
if(key3 == 0){ b = 3; }
P2 = 0xFB; //僅僅開啟out2
if(key3 == 0){ b = 6; }
P2 = 0xFD; //僅僅開啟out3
if(key3 == 0){ b = 9; }
break;
default: break;
}
//重置開啟九位輸入鍵，其它鍵關閉
P2 = 0xF1;
return b;
}
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