led.c

这些是基于dp51仿真仪的程序

#include<reg52.h>
#include <intrins.h>

sbit	SDA=P1^0;
sbit	CLK=P1^1;
sbit	LEDP=P1^7;

void	delay(unsigned int i);
void	send(unsigned char a);
main()

{
	unsigned char	m,DLED;
	while(1)
	{

		DLED=0x7f;
		for(m=0;m<8;m++)
		{
			send(DLED);
			LEDP=0;
			delay(0x40);
			LEDP=1;
			DLED=_cror_(DLED,1);
		}
	}	
}

void	delay(unsigned int i )
{		
	unsigned	int	j,k;
	for(k=0;k<i;k++)
		for(j=0;j<1000;j++);
}

void	send(unsigned char a)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		if(_crol_(a,i)&0x80)
			SDA=1;
		else
			SDA=0;
		CLK=0;
		CLK=1;
	}
}