流水灯.c

内容包含4*4键盘、ADC0808、DAC0832和流水灯

#include <AT89X51.h> 
 void Delay1ms(unsigned int count)
{
unsigned int i,j;
for(i=0;i<count;i++)
for(j=0;j<120;j++);
}

void main(void) 
{
unsigned int a=0Xfe,b=0X7f,n=0;
while(1)
{

Delay1ms(1000);

if(P3_1==0)
{
if(P0_7==0) n=0;
 P0=~(~a<<n);
 n++;
 }
else
{
if(P0_0==0) n=0;
P0=~(~b>>n);
n++;

 }
 if(P3_0==0)
 {
 {
 while(P3_0==0)
 {
 }
 }
 P3_1=~(P3_1);
 }
}
}