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#include<reg52.h>
sbit ADDR0 = P1^0;
sbit ADDR1 = P1^1;
sbit ADDR2 = P1^2;
sbit ADDR3 = P1^3;
sbit ENLED = P1^4;
sbit KEY_IN1 = P2^4;
sbit KEY_IN2 = P2^5;
sbit KEY_IN3 = P2^6;
sbit KEY_IN4 = P2^7;
sbit KEY_OUT1 = P2^3;
sbit KEY_OUT2 = P2^2;
sbit KEY_OUT3 = P2^1;
sbit KEY_OUT4 = P2^0;
unsigned char code LedChar[]={
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};
unsigned char Key_Buff[4][4]={{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}};
void T0_Init()
{
EA = 1;
TMOD = 0x01;
TH0 = 0xFC;
TL0 = 0x67;
ET0 = 1;
TR0 = 1;
}
void main()
{
unsigned char Key_Loosen[4][4]={{1,1,1,1},{1,1,1,1},{1,1,1,1},{1,1,1,1}};
ENLED = 0;
ADDR3 = 1;
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0;
P0 = LedChar[0];
P2=0xff;
T0_Init();
while(1)
{
unsigned char Num2,Num4;
for(Num4=0;Num4<4;Num4++)
{
for(Num2=0;Num2<4;Num2++)
{
if(Key_Loosen[Num4][Num2]!=Key_Buff[Num4][Num2])
// 第一遍（最開(kāi)始backup[i][j]的值等于1）第二遍（由于KeySta[i][j]的值附給了backup[i][j]，，backup[i][j]的值等于0，但是KeySta[i][j]的值任然等于0，由于if(backup[i][j] != KeySta[i][j])才能進(jìn)入此程序所以KeySta[i][j]的值必須等于1，而KeySta[i][j]的值等于1的唯一辦法就是松開(kāi)按鍵，按鍵松開(kāi)KeySta[i][j]的值等于1便進(jìn)入了
{
if(Key_Loosen[Num4][Num2]==0)
//第一遍（backup[i][j]的值任然等于1所以無(wú)法進(jìn)入if）第二遍（此時(shí)backup[i][j] == 0便順理成章的進(jìn)入了
{
P0 = LedChar[Num4*4+Num2];
}
Key_Loosen[Num4][Num2]=Key_Buff[Num4][Num2];
//第一遍（KeySta[i][j]的值附給了backup[i][j]，所以此時(shí)backup[i][j]的值等于0）第二遍（由于此時(shí)KeySta[i][j]的值等于1，而KeySta[i][j]又把自己的值賦給了 backup[i][j]，所以backup[i][j]的值又回到了初始化時(shí)的1）Over^-^
}
}
}
}
}
void InterruptTimer0() interrupt 1
{
unsigned char Num1;
static unsigned char Keys=0;
TH0 = 0xFC;
TL0 = 0x67;
Key_Buff[Keys][0]=(Key_Buff[Keys][0]<<1)|KEY_IN1;
Key_Buff[Keys][1]=(Key_Buff[Keys][1]<<1)|KEY_IN2;
Key_Buff[Keys][2]=(Key_Buff[Keys][2]<<1)|KEY_IN3;
Key_Buff[Keys][3]=(Key_Buff[Keys][3]<<1)|KEY_IN4;
for(Num1=0;Num1<4;Num1++)
{
if((Key_Buff[Keys][Num1]&0x0f)==0x00)
{
Key_Buff[Keys][Num1]=0;
}
}
Keys++;
Keys=Keys&0x03;
switch(Keys)
{
case 0:KEY_OUT4=1;KEY_OUT1=0;break;
case 1:KEY_OUT1=1;KEY_OUT2=0;break;
case 2:KEY_OUT2=1;KEY_OUT3=0;break;
case 3:KEY_OUT3=1;KEY_OUT4=0;break;
}
}
//注意數(shù)組也會(huì)重新初始化！
設(shè)計(jì)者：薛羽豪

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