主機#define KEY P1
//unsigned char code num[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x7f};
unsigned char code num[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //共yang數碼管
unsigned char KeyValue;
int i;
void Delay10ms(unsigned int c); //延時10ms
void KeyDown(); //檢測按鍵函數
void main(void)
{
while(1)
{
unsigned char temp=0;
KeyDown();
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
SCON=0x40;
PCON=0x00;
TR1=1;
i=KeyValue;
if(i<=9)
{
shuchu0 = num[0];
shuchu2 = num[KeyValue];
}
else
{
i=i-10;
shuchu0 = num[1];
shuchu2 = num[i];
}
while(1){
temp=KeyValue;
SBUF=temp;
while(TI==0);
TI=0;
break;
}
}
}
/*******************************************************************************
* 函 數 名 : KeyDown
* 函數功能 : 檢測有按鍵按下并讀取鍵值
* 輸 入 : 無
* 輸 出 : 無
*******************************************************************************/
void KeyDown(void)
{
char a = 0;
KEY=0x0f;
if(KEY!=0x0f)//讀取按鍵是否按下
{
Delay10ms(1);//延時10ms進行消抖
if(KEY!=0x0f)//再次檢測鍵盤是否按下
{
//測試列
KEY=0X0F;
switch(KEY)
{
case(0X07): KeyValue=0;break;
case(0X0b): KeyValue=4;break;
case(0X0d): KeyValue=8;break;
case(0X0e): KeyValue=12;break;
}
//測試行
KEY=0XF0;
switch(KEY)
{
case(0X70): KeyValue=KeyValue+3;break;
case(0Xb0): KeyValue=KeyValue+2;break;
case(0Xd0): KeyValue=KeyValue+1;break;
case(0Xe0): KeyValue=KeyValue;break;
}
while((a<50) && (KEY!=0xf0)) //檢測按鍵松手檢測
{
Delay10ms(1);
a++;
}
}
}
}
void Delay10ms(unsigned int c)
{
unsigned char a, b;
for (;c>0;c--)
{
for (b=38;b>0;b--)
{
for (a=130;a>0;a--);
}
}
}
從機#include<reg51.h>
unsigned char code num[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e}; //共yang數碼管
unsigned char i;
#define shuchu0 P0
#define shuchu2 P2
void main(void)
{
while(1){
unsigned char temp=0;
TMOD=0x20;
TH1=0xfd;
TL1=0xfd;
SCON=0x50;
PCON=0x00;
TR1=1;
while(1)
{
while(RI==0);
RI=0;
temp=SBUF;
i=temp;
if(i<=9)
{
shuchu0 = num[0];
shuchu2 = num[i];
}
else
{
i=i-10;
shuchu0 = num[1];
shuchu2 = num[i];
}
}
}
}
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