#include
#include?
#include?“IIC.h“
#include?“HTU.h“
unsigned?char?flag;
/*================================================================
【名?稱】void?Delay（unsigned?int?t）
【功?能】延時長
================================================================*/
void?Delay（unsigned?int?t）
{
	unsigned?char?i;
	while（t--）
	{
		for（i?=?0;i?	}					???
}

/*================================================================
【名?稱】void?SHT21Init（void）
【功?能】SHT21初始化函數
================================================================*/
void?HTU21DInit（void）
{
	I2CInit（）;		//I2C初始化
	I2CStart（）;		//啟動I2C
	I2CWriteByte（HTU21DADDR&0xfe）;		//寫SHT21的I2C地址
	I2CWriteByte（0xfe）;
	I2CStop（）;		//停止I2C
	Delay（600）;		//短延時
}


/*================================================================
【名?稱】long?Sht21Work（unsigned?char?order）
【功?能】Sht21測量溫濕度
================================================================*/
int?HTU21DWork（unsigned?char?order）
{
	float?temp?=?0TH?=?0;
	unsigned?char?MSBLSB;
	unsigned?int?shiduwendu;
	
	I2CStart（）;
	if（I2CWriteByte（HTU21DADDR?&?0xfe）?==?ACK）
	{
		if（I2CWriteByte（order）?==?ACK）
		{
			do
			{
				Delay（30）;
				I2CStart（）;	
			}
			while（I2CWriteByte（HTU21DADDR?|?0x01）?==?NACK）;
			MSB?=?I2CReadByte（ACK）;
			Delay（30）;
			LSB?=?I2CReadByte（ACK）;
			I2CReadByte（NACK）;
			I2CStop（）;
			LSB?&=?0xfc;
			temp?=?MSB*256+LSB;
				if?（order?==?0xf3）//觸發開啟溫度檢測
			{
				TH=（175.72）*temp/65536-46.85;//溫度:T=?-46.85?+?175.72?*?ST/2^16
				wendu?=（unsigned?int）（fabs（TH）*100）;
				if（TH?>=?0）
					flag?=?0;
				else
					flag?=?1;
				return?wendu;	
			}
			else
			{
				TH?=?（temp*125）/65536-6;
				shidu?=?（unsigned?int）（fabs（TH）*100）;//濕度:?RH%=?-6?+?125?*?SRH/2^16
				return?shidu;
			}
		}
	}
	return?0;
}

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

?????文件???????1941??2017-03-02?09:41??HTU21d程序?成功\eeprom.h

?????文件???????1894??2017-09-06?10:36??HTU21d程序?成功\HTU.c

?????文件????????148??2015-11-23?19:00??HTU21d程序?成功\HTU.h

?????文件??????26425??2017-09-13?15:01??HTU21d程序?成功\HTU21D

?????文件??????10268??2017-09-13?15:01??HTU21d程序?成功\HTU21D.hex

?????文件?????????58??2017-09-13?15:01??HTU21d程序?成功\HTU21D.lnp

?????文件??????33713??2017-09-13?15:01??HTU21d程序?成功\HTU21D.M51

?????文件????????198??2017-09-13?15:59??HTU21d程序?成功\HTU21D.plg

????.......?????59012??2017-09-13?15:57??HTU21d程序?成功\HTU21D.uvopt

????.......?????13400??2017-09-06?16:37??HTU21d程序?成功\HTU21D.uvproj

????.......?????58969??2017-09-06?16:37??HTU21d程序?成功\HTU21D_uvopt.bak

????.......?????????0??2017-09-06?10:18??HTU21d程序?成功\HTU21D_uvproj.bak

?????文件???????3001??2017-09-06?10:35??HTU21d程序?成功\IIC.c

?????文件????????324??2017-09-06?10:52??HTU21d程序?成功\IIC.h

?????文件???????2873??2017-09-06?11:34??HTU21d程序?成功\lcd.c

?????文件????????552??2017-09-06?10:25??HTU21d程序?成功\lcd.h

?????文件???????4681??2017-09-06?12:14??HTU21d程序?成功\main.c

?????文件??????12103??2017-09-13?15:01??HTU21d程序?成功\main.LST

?????文件??????29352??2017-09-13?15:01??HTU21d程序?成功\main.OBJ

?????文件???????6376??2009-05-07?14:37??HTU21d程序?成功\STARTUP.A51

?????文件??????14048??2017-09-13?15:01??HTU21d程序?成功\STARTUP.LST

?????文件????????749??2017-09-13?15:01??HTU21d程序?成功\STARTUP.OBJ

?????目錄??????????0??2017-09-13?15:59??HTU21d程序?成功

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

???????????????280085????????????????????23