#include?

#define	UINT8?	unsigned?char
#define?UINT16?	unsigned?int

sbit?B_IN=P4^3;
sbit?B_SS=P1^7;

UINT8?Bcode[89]i=0;	?//RAM?for?the?coment?decoded?form?IRIG-B100?in?1s
UINT8?sec=0min=0hour=0;	?//clock?time?to?display?in?segment
UINT8?ppn;
bit?flag=0pr=0;		?//B-code?valid?flagif?B-code‘s?exist?is?ascerstainedthen?set?

UINT8?code?COM[6]={0x010x020x040x080x100x20};							//段選碼-時分秒
UINT8?code?SEG[10]={0x030x9f0x250x0d0x990x490x410x1f0x010x09};		//0-9的字型碼

void?InitSYS（）
{
	IP=0x80;
//	AUXR=0x11;
//	BRT=0xfc;
//	SCON=0x50;
	TMOD=0x11;	??	//both?time0?time1?as?16-bit?timer
	TH0=0x00;
	TL0=0x00;

	TH1=0xf8;
	TL1=0xcd;		//2ms
	TR1=1;			//enable?timer1?2ms?interrupt??

	IT0=1;			//INT0?posedge?trig

//	ES=1;
	EA=1;
}

void?InitPCA（）
{
	AUXR1=0x40;		//P1.3?transist?to?P4.3
	CCON=0x00;		//stop?timerclear?all?flag
	CMOD=0x00;		//Fosc/12disable?timer?overflow
	CCAPM1=0x31;	//PCA?module?1?capture?as?a?transtion?occours
	CL=0;
	CH=0;
	CR=1;			//enable?all?interrupt	
}

/*void?send（UINT8?serial_data）
{
	SBUF=serial_data;
	while（!TI）?;
	TI=0;
}
*/
void?INT0_int（）?interrupt?0			?//clock?generated?by?1pps?from?B-code
{
	sec++;
	if（sec>=60）?{sec=0;min++;}
	if（min>=60）?{min=0;hour++;}
	if（hour>=24）{hour=0;}	
}

void?Timer1_int（）?interrupt?3
{
	UINT8?j;??//0-5just?for?scan

	TH1=0xf8;
	TL1=0xcd;?//2ms

	P2=COM[j];

	switch（j）
	{
		case?0:	P0=SEG[sec/10];?break;
		case?1:?P0=SEG[sec%10];?break;
		case?2:	P0=SEG[min/10];?break;
		case?3:?P0=SEG[min%10];?break;
		case?4:	P0=SEG[hour/10];break;
		case?5:?P0=SEG[hour%10];break;
		default:?break;
	}
	j++;
	if（j>=6）?j=0;
}

void?PCA_int（）?interrupt?7
{
	CCF1=0;

	if（B_IN）?	//posedge
	{
		TR0=1;
	}
	if（!B_IN）	???//negedgeIRIG-B?decoder?and?storage
	{
		TR0=0;						//stop?timer0.

		if（（TH0>0x25）&&（TH0<0x27））	//8ms	
		{
			p=2;
			if（i==0）?B_SS=0;
			if（pn==2）?{i=0;pr=1;}
		}
		else?if（（TH0>0x17）&&（TH0<0x19））?p=1;?	//5ms
		else?if（（TH0>0x08）&&（TH0<0x10））?p=0;	//2ms
		if（（p==1）||（p==0））
		{
			Bcode[i]=p;
			i++;
		}
		if（pr）
		{
			if（i==10）?B_SS=1;
			if（i==30）?flag=1;	//IRIG-B?code?existsthen?set?the?flagonly?need?the?first?clock?timeso?the?others?are?passed?by
			if（i==88）?pr=0;	?		//precede?set?11s?is?overthe?new?pps?will?begin	
		}
		if（i>=89）?i=0;			???		
		pn=p;

		TH0=0x00;
		TL0=0x00;
	}?

/*
		if（（TH0>0x25）&&（TH0<0x27））	//8ms	
		{
			p=2;
			if（pn==2）?{i=0;pr=1;}
		}
		else?if（TH0<0x20）
		{
			p=1;
			Bcode[i]=TH0;
			i++;
		}
		if（pr）
		{
			if（i==10）?B_SS=1;
			if（i==30）?flag=1;	//IRIG-B?code?existsthen?set?the?flagonly?need?the?first?clock?timeso?the?others?are?passed?by
			if（i==88）?{B_SS=0;pr=0;}	?		//precede?set?11s?is?overthe?new?pps?will?begin
		}				???		
		pn=p;

		if（p==1）?{send（i）;send（Bcode[i]）;}
		TH0=0x00;
		TL0=0x00;
	}
*/
}

void?main（）
{
	InitSYS（）;
	InitPCA（）;
	B_SS=1;
	
	while（!flag

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????649126??2012-06-29?08:57??B碼對時\+B+碼對時.pdf

?????文件???????3579??2011-08-23?13:47??B碼對時\B-decoder1.c

?????文件??????96768??2012-06-29?09:01??B碼對時\FPGA_CPLD數字時鐘的實現（原代碼）.doc

?????文件?????330070??2009-12-29?11:08??B碼對時\IRIG?Serial?Time?Code?Formats.pdf

?????文件??????74657??2009-12-22?16:42??B碼對時\IRIG-B.pdf

?????文件?????200192??2012-06-28?16:33??B碼對時\IRIG-B格式時間碼解碼接口卡電路設計.doc

?????文件?????349696??2012-06-29?08:59??B碼對時\IRIG-B碼校時、對時_DCS、PLC對時.doc

?????文件?????742194??2012-06-28?16:50??B碼對時\IRIG-B解碼芯片說明書（v1.12）.pdf

?????文件?????145207??2012-06-29?09:02??B碼對時\在變電站智能設備中實現B碼對時.pdf

?????文件?????144000??2012-06-29?09:01??B碼對時\基于CPLD的IRIG—B碼解碼器的設計.pdf

?????目錄??????????0??2012-07-04?10:36??B碼對時

-----------?---------??----------?-----??----

??????????????2735489????????????????????11