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我想補充下
*******************************************/
#include <reg51.h>
#include <intrins.h>
unsigned char a;
unsigned int b;
sbit BEEP = P1^5;
sbit RELAY = P1^4;//繼電器 的線
sbit K1 = P0^0; sbit K2 = P0^1;
sbit K3 = P0^2; sbit K4 = P0^3;
sbit K5 = P0^4; sbit K6 = P0^5;
sbit K7 = P0^7; sbit K0 = P0^6;
void beep();
void number();
/*********************************************************/
main()
{
while(1)
{
P2 = 0xff;
if(K1==0)
P2 = 0xfe;
if (K0==0)
P2 = 0x03;
if (K7==0) //這個可以延時的好軟件
{
P2 = 0x01;
for (a=0; a<255; a++)
{
number();
for (b=0; b<11000; b++)
P2 = a;
}
}
if(K2 == 0)
P2 = 0xfd;
if(!K3)
P2 = 0xfb;
if(!K4)
P2 = 0xf7;
if (!K5 )
beep(); //喇叭發聲
RELAY = 1;
if (!K6 )
{
for ( b=0; b<63000; b++)
RELAY =0;
}
}
}
/**********************************************************/
void beep()
{
unsigned char i , j;
for (i=0;i<100;i++)
{
BEEP=!BEEP; //BEEP取反
for (j = 0 ; j<250 ; j++) //需要產生方波
_nop_();
}
BEEP=1; //關閉蜂鳴器
}
/************/
void number()
{
unsigned int a;
for ( a=0; a<23000; a++);
P3=~0x3F&0X7f;
for ( a=0; a<23000; a++);
P3 = ~0X06;
for ( a=0; a<23000; a++);
P3 = ~0X5B;
for ( a=0; a<23000; a++);
P3 =~0X4F;
for ( a=0; a<23000; a++);
P3 =~0X66;
for ( a=0; a<23000; a++);
P3 =~0X6D;
for ( a=0; a<23000; a++);
P3 =~0X7D;
for ( a=0; a<23000; a++);
P3= ~0X07;
for ( a=0; a<23000; a++);
P3= ~0X7F;
for ( a=0; a<23000; a++);
P3 = ~0X6f;
for ( a=0; a<23000; a++);
P3 = ~0X77;
for ( a=0; a<23000; a++);
P3 = ~0X7C;
}
這是源程序我的是89C55的CPU
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