单片机Day10

对向流水

#include <REGX51.H>
typedef unsigned int u16;
typedef unsigned char u8;
#define led P2
void delay_10us(u16 t)
{
while(t--);
}
void main()
{
while(1)
{
P2=0x7e;
delay_10us(50000);
P2=0xbd;
delay_10us(50000);
P2=0xdb;
delay_10us(50000);
P2=0xe7;
delay_10us(50000);
P2=0xdb;
delay_10us(50000);
P2=0xbd;
delay_10us(50000);
}
}