8583.c

时钟芯片PCF8583的应用

#include<reg51.h>
#include<intrins.h>
#define nop4() _nop_();_nop_();_nop_();_nop_();  
#define nop5() _nop_();_nop_();_nop_();_nop_();_nop_();
#define rAdd 0xa1
#define wAdd 0xa0

typedef unsigned char uchar;
sbit VSCL = P3^6;
sbit VSDA = P3^7;
sbit p10 = P1^0;

void StartIIC()
{
	VSDA = 1;//hi
	VSCL = 1;
	nop4();
	VSDA = 0;//low
	nop4();
	VSCL = 0;
}

void StopIIC()
{
	VSDA = 0;
	VSCL = 1;
	nop4();
	VSDA = 1;
	nop5();
	VSDA = 0;
	VSCL = 0;
}

void CheckAckIIC()
{
	VSDA = 0;//prepare to read 
	VSCL = 1;//
	nop4();
	VSCL = 0;

}

void SendByteIIC(char schar)
{
	unsigned char data i;
	for(i = 8;i!=0;--i)
	{
		schar = schar<<1;
		VSDA = CY;
		VSCL = 1;
		nop4();
		VSCL = 0;
		VSDA = 0;
	}
}

void WriteByteEE(uchar addr,uchar wChar)
{
	StartIIC();
	SendByteIIC(wAdd);
	CheckAckIIC();
	SendByteIIC(addr);
	CheckAckIIC();
	SendByteIIC(wChar);
	CheckAckIIC();
	StopIIC();
}

void INT() interrupt 2{
    WriteByteEE(7,0x95);
    p10 = ~p10;
    WriteByteEE(0,0x04);  
}

void main(){
	IT1 = 1;
    EA = 1;
    EX1 = 1;
    
    WriteByteEE(8,0x0A);//默认是天记数, A是秒记数,9是百分之一秒记数;
    WriteByteEE(7,0x95);
    WriteByteEE(0,0x04);
    while(1);
    
}