/*
?*?ds1302.c:
?*	Real?Time?clock
?*
?*?Copyright?（c）?2013?Gordon?Henderson.
?***********************************************************************
?*?This?file?is?part?of?wiringPi:
?*	https://projects.drogon.net/raspberry-pi/wiringpi/
?*
?*????wiringPi?is?free?software:?you?can?redistribute?it?and/or?modify
?*????it?under?the?terms?of?the?GNU?Lesser?General?Public?License?as?published?by
?*????the?Free?Software?Foundation?either?version?3?of?the?License?or
?*????（at?your?option）?any?later?version.
?*
?*????wiringPi?is?distributed?in?the?hope?that?it?will?be?useful
?*????but?WITHOUT?ANY?WARRANTY;?without?even?the?implied?warranty?of
?*????MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR?PURPOSE.??See?the
?*????GNU?Lesser?General?Public?License?for?more?details.
?*
?*????You?should?have?received?a?copy?of?the?GNU?Lesser?General?Public?License
?*????along?with?wiringPi.??If?not?see?.
?***********************************************************************
?*/

#include?
#include?
#include?
#include?

#include?

#include?“ds1302.h“

//?Register?defines

#define	RTC_SECS	?0
#define	RTC_MINS	?1
#define	RTC_HOURS	?2
#define	RTC_DATE	?3
#define	RTC_MONTH	?4
#define	RTC_DAY		?5
#define	RTC_YEAR	?6
#define	RTC_WP		?7
#define	RTC_TC		?8
#define	RTC_BM		31


//?Locals

static?int?dPin?cPin?sPin?;

/*
?*?dsShiftIn:
?*	Shift?a?number?in?from?the?chip?LSB?first.?Note?that?the?data?is
?*	sampled?on?the?trailing?edge?of?the?last?clock?so?it‘s?valid?immediately.
?*********************************************************************************
?*/

static?unsigned?int?dsShiftIn?（void）
{
??uint8_t?value?=?0?;
??int?i?;

??pinMode?（dPin?INPUT）?;	delayMicroseconds?（1）?;

??for?（i?=?0?;?i???{
????value?|=?（digitalRead?（dPin）?<????digitalWrite?（cPin?HIGH）?;?delayMicroseconds?（1）?;
????digitalWrite?（cPin?LOW）?;	delayMicroseconds?（1）?;
??}

??return?value;
}


/*
?*?dsShiftOut:
?*	A?normal?LSB-first?shift-out?just?slowed?down?a?bit?-?the?Pi?is
?*	a?bit?faster?than?the?chip?can?handle.
?*********************************************************************************
?*/

static?void?dsShiftOut?（unsigned?int?data）
{
??int?i?;

??pinMode?（dPin?OUTPUT）?;

??for?（i?=?0?;?i???{
????digitalWrite?（dPin?data?&?（1?<????digitalWrite?（cPin?HIGH）?;			delayMicroseconds?（1）?;
????digitalWrite?（cPin?LOW）?;			delayMicroseconds?（1）?;
??}
}


/*
?*?ds1302regRead:?ds1302regWrite:
?*	Read/Write?a?value?to?an?RTC?Register?or?RAM?location?on?the?chip
?*********************************************************************************
?*/

static?unsigned?int?ds1302regRead?（const?int?reg）
{
??unsigned?int?data?;

??digitalWrite?（sPin?HIGH）?;?delayMicroseconds?（1）?;
????dsShiftOut?（reg）?;
????data?=?dsShiftIn?（）?;
??digitalWrite?（sPin?LOW）??;?delayMicroseconds?（1）?;

??return?data?;
}

static?void?ds1302regWrite?（const?int?reg?const?unsign

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-01-17?14:46??WiringOP-zero\
?????文件??????????52??2017-01-04?10:11??WiringOP-zero\.gitignore
?????文件????????2136??2017-01-04?10:11??WiringOP-zero\build
?????文件????????7651??2017-01-04?10:11??WiringOP-zero\COPYING.LESSER
?????目錄???????????0??2017-01-04?10:11??WiringOP-zero\debian\
?????文件?????????154??2017-01-04?10:11??WiringOP-zero\debian\changelog
?????文件???????????2??2017-01-04?10:11??WiringOP-zero\debian\compat
?????文件????????2457??2017-01-04?10:11??WiringOP-zero\debian\control
?????文件????????1405??2017-01-04?10:11??WiringOP-zero\debian\copyright
?????文件??????????10??2017-01-04?10:11??WiringOP-zero\debian\docs
?????文件??????????20??2017-01-04?10:11??WiringOP-zero\debian\gpio.install
?????文件??????????12??2017-01-04?10:11??WiringOP-zero\debian\libwiringop-dev.dirs
?????文件??????????14??2017-01-04?10:11??WiringOP-zero\debian\libwiringop-dev.install
?????文件???????????8??2017-01-04?10:11??WiringOP-zero\debian\libwiringop2.dirs
?????文件??????????52??2017-01-04?10:11??WiringOP-zero\debian\libwiringop2.install
?????文件????????3968??2017-01-04?10:11??WiringOP-zero\debian\libwiringop2.symbols
?????文件??????????58??2017-01-04?10:11??WiringOP-zero\debian\libwiringopdev2.install
?????文件????????1046??2017-01-04?10:11??WiringOP-zero\debian\rules
?????目錄???????????0??2017-01-04?10:11??WiringOP-zero\debian\source\
?????文件??????????13??2017-01-04?10:11??WiringOP-zero\debian\source\format
?????目錄???????????0??2017-01-04?10:11??WiringOP-zero\devLib\
?????文件????????5866??2017-01-04?10:11??WiringOP-zero\devLib\ds1302.c
?????文件????????1673??2017-01-04?10:11??WiringOP-zero\devLib\ds1302.h
?????文件????????2568??2017-01-04?10:11??WiringOP-zero\devLib\ds1302.o
?????文件???????55558??2017-01-04?10:11??WiringOP-zero\devLib\font.h
?????文件????????4119??2017-01-04?10:11??WiringOP-zero\devLib\gertboard.c
?????文件????????1484??2017-01-04?10:11??WiringOP-zero\devLib\gertboard.h
?????文件????????1440??2017-01-04?10:11??WiringOP-zero\devLib\gertboard.o
?????文件???????11549??2017-01-04?10:11??WiringOP-zero\devLib\lcd.c
?????文件????????2095??2017-01-04?10:11??WiringOP-zero\devLib\lcd.h
?????文件????????3884??2017-01-04?10:11??WiringOP-zero\devLib\lcd.o
............此處省略199個文件信息