消抖

#include

 

sbit ADDR0 = P1^0;

sbit ADDR1 = P1^1;

sbit ADDR2 = P1^2;

sbit ADDR3 = P1^3;

sbit ENLED = P1^4;

 

sbit KEY4 = P2^7;

 

unsigned char code LedChar[]={

0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,

0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E

};

 

 

void delay();

void main()

{

bit backup = 1;

bit keybuf = 1;

unsigned char cnt = 0;

 

ENLED = 0;

ADDR3 = 1;

ADDR2 = 0;

ADDR1 = 0;

ADDR0 = 0;

P2 = 0xF7;

P0 = LedChar[cnt];

 

while(1)

{

keybuf = KEY4;

if(keybuf != backup)

{

delay();

if(keybuf == KEY4)

{

if(backup == 0)

{

cnt++;

if(cnt >= 10)

{

cnt = 0;

}

P0 = LedChar[cnt];

}

backup = KEY4;

}

}

}

}

 

void delay()

{

unsigned int i = 1000;

while(i--);

}