intt0.c

这些是基于dp51仿真仪的程序

#include<reg51.h>
#include <intrins.h>

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

unsigned char dbuffer;

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

main()
{
	
	dbuffer=0xff;
	
	LEDP=0;
	
	EA=1;
	IE0=1;
	EX0=1;
	
	while(1)
	{
		send(dbuffer);
		
	}
}

void	int0_int(void)	interrupt	0
{
	EX0=0;
	dbuffer= ~ dbuffer;
	EX0=1;
}