闪烁灯04.c

89s51的c51源程序

#include<AT89X51.h>
unsigned char i;
void delay(unsigned char t,k);
main()
{
while(1)
{
for(i=0;i<9;i++)
{
P0_0=1;
P0_1=1;
P0_2=0;
P0_3=1;
P0_4=1;
P0_5=0;
P0_6=1;
P0_7=1;
delay(10,300);
P0_0=0;
P0_1=1;
P0_2=1;
P0_3=0;
P0_4=1;
P0_5=1;
P0_6=0;
P0_7=1;
delay(10,300);
P0_0=1;
P0_1=0;
P0_2=1;
P0_3=1;
P0_4=0;
P0_5=1;
P0_6=1;
P0_7=0;
delay(10,300);

}
}
}

void delay(unsigned char t,k)//延时子程序
{
while(--k)
{
while(--t);
}
}