#include?“HX711.h“
#include?


HX711::HX711（byte?dout?byte?pd_sck?byte?gain）?{
	PD_SCK?	=?pd_sck;
	DOUT?	=?dout;
	
	pinMode（PD_SCK?OUTPUT）;
	pinMode（DOUT?INPUT）;

	set_gain（gain）;
}

HX711::~HX711（）?{

}
//static
bool?HX711::is_ready（）?{
	return?digitalRead（DOUT）?==?LOW;
}

void?HX711::set_gain（byte?gain）?{
	switch?（gain）?{
		case?128:		//?channel?A?gain?factor?128
			GAIN?=?1;
			break;
		case?64:		//?channel?A?gain?factor?64
			GAIN?=?3;
			break;
		case?32:		//?channel?B?gain?factor?32
			GAIN?=?2;
			break;
	}

	digitalWrite（PD_SCK?LOW）;
	read（）;
}

long?HX711::read（）?{
	//?wait?for?the?chip?to?become?ready
	while?（!is_ready（））;

	byte?data[3];

	//?pulse?the?clock?pin?24?times?to?read?the?data
	for?（byte?j?=?3;?j--;）?{
		for?（char?i?=?8;?i--;）?{
			digitalWrite（PD_SCK?HIGH）;
			bitWrite（data[j]?i?digitalRead（DOUT））;
			digitalWrite（PD_SCK?LOW）;
		}
	}

	//?set?the?channel?and?the?gain?factor?for?the?next?reading?using?the?clock?pin
	for?（int?i?=?0;?i?		digitalWrite（PD_SCK?HIGH）;
		digitalWrite（PD_SCK?LOW）;
	}

	data[2]?^=?0x80;

	return?（（uint32_t）?data[2]?<}

long?HX711::read_average（byte?times）?{
	long?sum?=?0;
	for?（byte?i?=?0;?i?		sum?+=?read（）;
	}
	return?sum?/?times;
}

double?HX711::get_value（byte?times）?{
	return?read_average（times）?-?OFFSET;
}

float?HX711::get_units（byte?times）?{
	return?get_value（times）?/?SCALE;
}

void?HX711::tare（byte?times）?{
	double?sum?=?read_average（times）;
	set_offset（sum）;
}

void?HX711::set_scale（float?scale）?{
	SCALE?=?scale;
}

void?HX711::set_offset（long?offset）?{
	OFFSET?=?offset;
}

void?HX711::power_down（）?{
	digitalWrite（PD_SCK?LOW）;
	digitalWrite（PD_SCK?HIGH）;	
}

void?HX711::power_up（）?{
	digitalWrite（PD_SCK?LOW）;	
}

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

?????文件???????1812??2019-03-12?23:19??WeightScale\HX711.cpp

?????文件???????2295??2019-03-12?23:19??WeightScale\HX711.h

?????文件???????5134??2019-03-13?08:53??WeightScale\TM1637.cpp

?????文件???????2264??2019-03-12?23:19??WeightScale\TM1637.h

?????文件???????1991??2019-03-13?08:53??WeightScale\WeightScale.ino

?????目錄??????????0??2019-03-13?08:57??WeightScale

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

????????????????13496????????????????????6