键盘的录入和显示

ID:440722 · 发表于 2018-12-6 10:45

#include <reg52.h>
unsigned char code table[]={0xee,0xde,0xbe,0x7e,0xed,0xdd,0xbd,0x7d,0xeb,0xdb,0xbb,0x7b,0xe7,0xd7,0xb7,0x77};
unsigned char a[16]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};
unsigned char KeyH;
unsigned char KeyL;
unsigned char Key;
unsigned char d4;
void delay(unsigned int x);
void display1(unsigned char d4);
#define shuma P0
sbit LED_0=P1^0;
sbit LED_1=P1^1;
sbit LED_2=P1^2;
sbit LED_3=P1^3;
#define KL_0 P2&=0xf0
#define KL_F P2|=0x0f
#define KH_0 P2&=0x0f
#define KH_F P2|=0xf0
void main()
{
unsigned char t;
unsigned char i;
unsigned char res;
d4=0;
while(1)
{
display1(d4);
KL_0;
t=P2&0xf0;
if(t!=0xf0)
{
KeyH=t&0xf0;
P2=0xff;
delay(100);
P2&=0x0f;
t=P2&0x0f;
if(t!=0x0f)
{
KeyL=t;
Key=KeyH|KeyL;
for(i=0;i<16;i++)
{
if(table[i]==Key)
res=i;
}
d4=res;
}
}
P2=0xff;
}
}
void delay(unsigned int x)
{
unsigned int i;
for(i=0;i<x;i++);
}
void display1(unsigned char d4)
{
shuma=a[d4];
LED_3=0;
delay(100);
LED_3=1;
}

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