ds1302.c

proteus与keil仿真89c55控制18b20 ds1302 字符液晶

#include "data.h"

uchar	Write1302(uchar Addr, uchar Data);	//写1302
uchar	Read1302(uchar Addr);				//读1302
void	delay(short t);						//延时函数
//uchar BcdToHex(uchar time,uchar Data);

uchar Write1302(uchar Addr, uchar Data)
{
	int i;

	clk=0;
	P2_6=0;
	P2_7=0;

	for(i=0;i<=7;i++)
	{
		if((Addr&0x01)==0)
			dat=0;
		else
			dat=1;
		clk=1;
		delay(5);
		clk=0;
		Addr=Addr>>1;
	}
	
	for(i=0;i<=7;i++)
	{
		if((Data&0x01)==0)
			dat=0;
		else
			dat=1;
		clk=1;
		delay(5);
		clk=0;
		Data=Data>>1;
	}
	clk=1;
	P2_6=1;
	P2_7=1;
	return 0;
}

uchar Read1302(uchar Addr)
{
	int i;
	uchar time,rbit;

	time=0;
	rbit=0;
	clk=0;
	P2_6=0;
	P2_7=0;

	for(i=0;i<=7;i++)
	{
		if((Addr&0x01)==0)
			dat=0;
		else
			dat=1;
		clk=1;
		delay(5);
		clk=0;
		Addr=Addr>>1;
	}

	for(i=0;i<=7;i++)
	{
		rbit=dat;
		rbit=rbit<<i;
		time=time|rbit;
		clk=1;
		delay(5);
		clk=0;
	}

	clk=1;
	P2_6=1;
	P2_7=1;

	return time;
}

void delay(short t)
{
	int i;

	for(i=0;i<=t;i++)
	{;}
}
/*
uchar BcdToHex(uchar time,uchar Data)
{
	uchar temp1,temp2;
	
	time = time & Data;
	temp1 = time >> 4;
	temp2 = time & 0x0f;
	time = temp1 * 10 + temp2;	

	return time;
}
*/