单片机按键控制数码管源程序

ID:368707 · 发表于 2018-7-11 15:15

按键控制数码管

单片机源程序如下:

# 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_IN_1 = P2^4;
sbit KEY_IN_2 = P2^5;
sbit KEY_IN_3 = P2^6;
sbit KEY_IN_4 = P2^7;
sbit KEY_OUT_1 = P2^3;
sbit KEY_OUT_2 = P2^2;
sbit KEY_OUT_3 = P2^1;
sbit KEY_OUT_4 = P2^0;
unsigned char code LedChar[] = {
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E
};
unsigned char KeySta[4][4] = {
{1,1,1},{1,1,1},{1,1,1},{1,1,1}
};
void main()
{
unsigned char i,j;
unsigned char backup[4][4] ={
{1,1,1},{1,1,1},{1,1,1},{1,1,1}
} ;
EA = 1;
ENLED = 0;
ADDR3 = 1;
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0;
TMOD = 0x01;
TH0 = 0xFc;
TL0 = 0x67;
ET0=1;
TR0 = 1;
P0 = LedChar[0];
while(1)
{
for(i=0;i<4;i++)
{
for(j=0;j<4;j++)
{
if( backup[i][j]!=KeySta[i][j])
{
if( backup[i][j]!=0)
{
P0 = LedChar[i*4+j];
}
backup[i][j] = KeySta[i][j];
}
}
}
}
}
void InterruptTimer0()interrupt 1
{
unsigned char i;
static unsigned char keyout = 0 ;
static unsigned char keybuf[4][4] ={
{0xFF,0xFF,0xFF,0xFF}, {0xFF,0xFF,0xFF,0xFF}, {0xFF,0xFF,0xFF,0xFF}, {0xFF,0xFF,0xFF,0xFF}
};
TH0 =0xFC;
TL0 = 0x67;
keybuf[keyout][0] = (keybuf[keyout][0]<<1)|KEY_IN_1;
keybuf[keyout][1] = (keybuf[keyout][1]<<1)|KEY_IN_2;
keybuf[keyout][2] = (keybuf[keyout][2]<<1)|KEY_IN_3;
keybuf[keyout][3] = (keybuf[keyout][3]<<1)|KEY_IN_4;
for(i=0;i<4;i++)
{
if((keybuf[keyout][i]&0xFF) == 0x00 )
{
KeySta[keyout][i] =0;
}
else if((keybuf[keyout][i]&0xFF) ==0x0F)
{
KeySta[keyout][i] =1;
}
}
keyout++;
keyout = keyout & 0x03;
switch(keyout)
{
case 0: KEY_OUT_4 =1;KEY_OUT_1 =0;break;
case 1: KEY_OUT_1 =1;KEY_OUT_2 =0;break;
case 2: KEY_OUT_2 =1;KEY_OUT_3 =0;break;
case 3: KEY_OUT_3 =1;KEY_OUT_4 =0;break;
default: break;
}
}

复制代码

所有资料51hei提供下载:

shuma44.zip (854 Bytes, 下载次数: 7)

帐号		自动登录	找回密码
密码			立即注册