test.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);
void ledliu(unsigned char DLED);

main()
{
	while(1)
	ledliu(0xfe);
}	


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;
	}
}

void ledliu(unsigned char DLED)
{
	unsigned char i;
	for(i=0;i<8;i++)
	{
		send(DLED);
		LEDP=0;
		delay(0x10);
		LEDP=1;
		DLED=_crol_(DLED,1);
	}
}