Question

51单片机c语言设计,按键控制数码管,依次按下显示0到9循环？

Answer 1

假设你的是共阳极数码管，P0接数码。按键接P2^0;

#include<reg52.h>
typedef unsinged int uint;
sbit key=P2^0;
unsigned char tab[]={0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};

void denay(uint x)
{
uint i,j;
for(i=x;i>0;i--)
for(j=110;j>0;j--)

}

void main()
{
uchar a;

while(1)
{
P0=tab[a];

if (key1==0)
{delay(10);
if(key==0)
{
while(!key1);

a++;
if(a==10) a=0;

}

}

}