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arduino-cli/libraries/Hx711/Hx711.cpp

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+/*
+ * Hx711.cpp
+ *
+ *  Created on: Oct 31, 2012
+ *      Author: agu
+ */
+
+#include "Hx711.h"
+
+Hx711::Hx711(int IO_DOUT,int IO_SCK)
+{
+	DOUT = IO_DOUT;
+	SCK = IO_SCK;
+	pinMode(SCK, OUTPUT);
+	pinMode(DOUT, INPUT);
+}
+
+void Hx711::setScale(float IO_scale)
+{
+	scale = IO_scale;
+}
+
+void Hx711::setOffset(long IO_offset)
+{
+	offset = IO_offset;
+}
+
+long Hx711::getValue()
+{
+	unsigned long Count;
+	unsigned char i;
+	digitalWrite(SCK,LOW);
+	Count = 0;
+	while(digitalRead(DOUT) == 1);
+	for(i=0;i<24;i++)
+	{
+		digitalWrite(SCK,HIGH);
+		Count = Count<<1;
+		digitalWrite(SCK,LOW);
+		if(digitalRead(DOUT) == 1) Count++;
+	}
+	digitalWrite(SCK,HIGH);
+	Count = Count^0x800000;
+	digitalWrite(SCK,LOW);
+	return Count;
+}
+
+long Hx711::getAverageValue(char IO_times)
+{
+	long sum=0;
+	char i;
+	for(i=0;i<IO_times;i++)
+	{
+		sum += getValue();
+	}
+	return sum/IO_times;
+}
+
+float Hx711::getWeight(char IO_times)
+{
+	long temp;
+	temp = getAverageValue(IO_times) - offset;
+	return (float)temp/scale;
+}
+