//靜態數碼管, 按下K1增加到F, 按下K2減少到0
#include "reg52.h"
typedef unsigned int u16;
typedef unsigned char u8;
sbit K1=P1^0;
sbit K2=P1^2;
unsigned int i=0;
signed int j=0;
u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void delay(u16 i)
{
while(i--);
}
void keypush1()
{
if (K1==0)
{
delay(1000);
if (K1==0)
{
j++;
}
while(!K1);
}
}
void keypush2()
{
if (K2==0)
{
delay(1000);
if (K2==0)
{
j--;
}
while(!K2);
}
}
void DigDisplay()
{
P0=~smgduan[j];
}
void main()
{
while(1)
{
keypush1();
if (j>15)
{
j=15;
}
keypush2();
if (j<0)
{
j=0;
}
DigDisplay();
}
}
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