<meter id="pryje"><nav id="pryje"><delect id="pryje"></delect></nav></meter>

<label id="pryje"></label>

新聞中心

EEPW首頁(yè) > 嵌入式系統(tǒng) > 設(shè)計(jì)應(yīng)用 > MSP430和實(shí)時(shí)時(shí)鐘HT1381的接口程序

MSP430和實(shí)時(shí)時(shí)鐘HT1381的接口程序

作者：時(shí)間：2016-11-13 來(lái)源：網(wǎng)絡(luò)

加入技術(shù)交流群
- 掃碼加入
  和技術(shù)大咖面對(duì)面交流
  海量資料庫(kù)查詢

收藏

HT1381是臺(tái)灣HT公司的一款串行實(shí)時(shí)時(shí)鐘IC，工作電壓：2.0V~5.5V，最大輸入串行時(shí)鐘500kHz（VDD=2V），2MHz（VDD=5V）；工作電流：2V時(shí)小于300nA，5V時(shí)小于1mA。串行I/O傳送，二種數(shù)據(jù)傳送方式：?jiǎn)巫止?jié)或多字節(jié)（Burst方式），所有寄存器以BCD碼格式存儲(chǔ)
具有接口簡(jiǎn)單、功耗低、工作電壓范圍寬、計(jì)時(shí)精確、功能全、成本低等優(yōu)點(diǎn)，
因此在實(shí)際應(yīng)用中被廣泛采用。
該芯片提供秒、分、時(shí)、日、日期、月和年的信息。
對(duì)于小于31天的月的月末日期能自動(dòng)進(jìn)行調(diào)整，還包括閏年校正功能。低功耗設(shè)計(jì)且時(shí)鐘的運(yùn)行可以采用24小時(shí)格式或帶AM/PM指示的12小時(shí)的格式。

以下是接口程序，430測(cè)試頻率為4M.
#define NOP _NOP();_NOP()

#define NowSec cNowTime[0]
#define NowMin cNowTime[1]
#define NowHour cNowTime[2]
#define NowDate cNowTime[3]
#define NowMonth cNowTime[4]
#define NowYear cNowTime[5]

#define SetSec cSetTime[0]
#define SetMin cSetTime[1]
#define SetHour cSetTime[2]
#define SetDate cSetTime[3]
#define SetMonth cSetTime[4]
#define SetYear cSetTime[5]

uchar Temp_Count;
uchar cSetTime[6];
uchar cNowTime[6];

voidTimer_Out_Byte(uchar OutByte);
uchar Timer_In_Byte(void);

void ReadRealtime(void)
{
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;

Timer_Out_Byte(0xBF); //Read, Burst Mode

for(TimeCount=0;TimeCount<6;TimeCount++)
{
if(TimeCount==5)
Timer_In_Byte(); //dummy read.
cNowTime[TimeCount]=Timer_In_Byte();
//change BCD to uchar
cNowTime[TimeCount]=(cNowTime[TimeCount]/0x10)*10+(cNowTime[TimeCount]%0x10);
}
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;
}

void WriteRealtime(void)
{
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0; //for sure to close rest.
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x8E); //Write,Single Mode
Timer_Out_Byte(0x00); //Write, Protect Byte=0, Disable protect
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x80); //Write,Single Mode
Timer_Out_Byte(0x00); //Write, OSC enalbe, old second distroied
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

for(TimeCount=0;TimeCount<6;TimeCount++)
{
//change uchar to BCD
cSetTime[TimeCount]=(cSetTime[TimeCount]/10)*0x10+(cSetTime[TimeCount]%10);
}

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0XBE); //Write,Burst Mode
Timer_Out_Byte(SetSec & 0x7F); //OSC enable for sure.
Timer_Out_Byte(SetMin);
Timer_Out_Byte(SetHour & 0x7F); //24 Hour Mode
Timer_Out_Byte(SetDate);
Timer_Out_Byte(SetMonth);
Timer_Out_Byte(0x00);
Timer_Out_Byte(SetYear);
Timer_Out_Byte(0x00);
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x8E); //Write,Single Mode
Timer_Out_Byte(0x80); //Write, Protect Byte=0, enable protect
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

}

void Timer_Out_Byte(uchar OutByte)
{
uchar Timer_Count;
for (Timer_Count=0;Timer_Count<8;Timer_Count++)
{
HT1381_DIRPORT |= Timer_SDA; //output
if ((OutByte & 0x01) == 0)
HT1381_OUTPORT &=~Timer_SDA;
else
HT1381_OUTPORT |= Timer_SDA;
NOP;
HT1381_OUTPORT |= Timer_SCL;
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
OutByte = OutByte >> 1;
}
}

uchar Timer_In_Byte(void)
{
uchar InByte,Timer_Count;

InByte=0x00;
HT1381_DIRPORT &=~Timer_SDA; //Timer_SDA=1;//input

for (Timer_Count=0;Timer_Count<8;Timer_Count++)
{
InByte >>= 1;
NOP;
HT1381_OUTPORT |= Timer_SCL;
if(HT1381_INPORT&Timer_SDA)
InByte |= 0x80;
else
InByte &= 0x7F;

NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
}

return(InByte);
}
#define NOP _NOP();_NOP()

#define NowSec cNowTime[0]
#define NowMin cNowTime[1]
#define NowHour cNowTime[2]
#define NowDate cNowTime[3]
#define NowMonth cNowTime[4]
#define NowYear cNowTime[5]

#define SetSec cSetTime[0]
#define SetMin cSetTime[1]
#define SetHour cSetTime[2]
#define SetDate cSetTime[3]
#define SetMonth cSetTime[4]
#define SetYear cSetTime[5]

uchar Temp_Count;
uchar cSetTime[6];
uchar cNowTime[6];

voidTimer_Out_Byte(uchar OutByte);
uchar Timer_In_Byte(void);

void ReadRealtime(void)
{
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;

Timer_Out_Byte(0xBF); //Read, Burst Mode

for(TimeCount=0;TimeCount<6;TimeCount++)
{
if(TimeCount==5)
Timer_In_Byte(); //dummy read.
cNowTime[TimeCount]=Timer_In_Byte();
//change BCD to uchar
cNowTime[TimeCount]=(cNowTime[TimeCount]/0x10)*10+(cNowTime[TimeCount]%0x10);
}
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;
}

void WriteRealtime(void)
{
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0; //for sure to close rest.
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x8E); //Write,Single Mode
Timer_Out_Byte(0x00); //Write, Protect Byte=0, Disable protect
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x80); //Write,Single Mode
Timer_Out_Byte(0x00); //Write, OSC enalbe, old second distroied
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

for(TimeCount=0;TimeCount<6;TimeCount++)
{
//change uchar to BCD
cSetTime[TimeCount]=(cSetTime[TimeCount]/10)*0x10+(cSetTime[TimeCount]%10);
}

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0XBE); //Write,Burst Mode
Timer_Out_Byte(SetSec & 0x7F); //OSC enable for sure.
Timer_Out_Byte(SetMin);
Timer_Out_Byte(SetHour & 0x7F); //24 Hour Mode
Timer_Out_Byte(SetDate);
Timer_Out_Byte(SetMonth);
Timer_Out_Byte(0x00);
Timer_Out_Byte(SetYear);
Timer_Out_Byte(0x00);
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

NOP;
HT1381_OUTPORT |= Timer_Rest; //Timer_Rest=1;
Timer_Out_Byte(0x8E); //Write,Single Mode
Timer_Out_Byte(0x80); //Write, Protect Byte=0, enable protect
NOP;
HT1381_OUTPORT &=~Timer_Rest; //Timer_Rest=0;

}

void Timer_Out_Byte(uchar OutByte)
{
uchar Timer_Count;
for (Timer_Count=0;Timer_Count<8;Timer_Count++)
{
HT1381_DIRPORT |= Timer_SDA; //output
if ((OutByte & 0x01) == 0)
HT1381_OUTPORT &=~Timer_SDA;
else
HT1381_OUTPORT |= Timer_SDA;
NOP;
HT1381_OUTPORT |= Timer_SCL;
NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
OutByte = OutByte >> 1;
}
}

uchar Timer_In_Byte(void)
{
uchar InByte,Timer_Count;

InByte=0x00;
HT1381_DIRPORT &=~Timer_SDA; //Timer_SDA=1;//input

for (Timer_Count=0;Timer_Count<8;Timer_Count++)
{
InByte >>= 1;
NOP;
HT1381_OUTPORT |= Timer_SCL;
if(HT1381_INPORT&Timer_SDA)
InByte |= 0x80;
else
InByte &= 0x7F;

NOP;
HT1381_OUTPORT &=~Timer_SCL; //Timer_SCL=0;
}

return(InByte);
}

<a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=114&cb=INSERT_RANDOM_NUMBER_HERE&n=a7a83b30' border='0' alt='' /></a>
<a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=115&cb=INSERT_RANDOM_NUMBER_HERE&n=a3d98779' border='0' alt='' /></a>
<a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=116&cb=INSERT_RANDOM_NUMBER_HERE&n=abca108c' border='0' alt='' /></a>
<a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=117&cb=INSERT_RANDOM_NUMBER_HERE&n=a1775170' border='0' alt='' /></a>
<a target='_blank'><img src='https://ad.eepw.com.cn/www/delivery/avw.php?zoneid=118&cb=INSERT_RANDOM_NUMBER_HERE&n=a449048b' border='0' alt='' /></a>

關(guān)鍵詞： MSP430實(shí)時(shí)時(shí)鐘HT138

評(píng)論

相關(guān)推薦

MSP430和實(shí)時(shí)時(shí)鐘HT1381的接口程序

嵌入式系統(tǒng) MSP430實(shí)時(shí)時(shí)鐘HT138 | 2016-11-13

焦點(diǎn)

推薦視頻

技術(shù)專區(qū)

看屁屁www成人影院,亚洲人妻成人图片,亚洲精品成人午夜在线,日韩在线欧美成人 (function(){ var bp = document.createElement('script'); var curProtocol = window.location.protocol.split(':')[0]; if (curProtocol === 'https') { bp.src = 'https://zz.bdstatic.com/linksubmit/push.js'; } else { bp.src = 'http://push.zhanzhang.baidu.com/push.js'; } var s = document.getElementsByTagName("script")[0]; s.parentNode.insertBefore(bp, s); })();