HX711.cpp 文件
- #include "HX711.h"
- #include "Arduino.h"
- //int DOUT;//定义数据引脚
- //int SCK;//定义时钟引脚
- //float scale;//定义比例系数
- //long offset;//定义补偿值
- //int times;//定义采集次数
- Hx711::Hx711(int IO_DOUT,int IO_SCK)//构造函数
- {
- DOUT = IO_DOUT;
- SCK = IO_SCK;
- pinMode(SCK, OUTPUT);//设置IO口工作方式
- pinMode(DOUT, INPUT);
- }
- void Hx711::setScale(float IO_scale)//设置比例系数
- {
- scale = IO_scale;
- }
- void Hx711::setOffset(long IO_offset)//设置补偿值
- {
- offset = IO_offset;
- }
- long Hx711::getValue()//采集一次ADC值
- {
- unsigned long Count;
- unsigned char i;
- digitalWrite(SCK,LOW);
- Count = 0;
- while(digitalRead(DOUT) == 1);//低电平时数据可以输出
- for(i=0;i<24;i++)//循环读取数据
- {
- digitalWrite(SCK,HIGH);
- Count = Count<<1;
- digitalWrite(SCK,LOW);
- if(digitalRead(DOUT) == 1) Count++;//最低位置1
- }
- digitalWrite(SCK,HIGH);
- Count = Count^0x800000;//最高位置0
- digitalWrite(SCK,LOW);//128增益
- return Count;
- }
- long Hx711::getAverageValue(char IO_times)//采集ADC平均值
- {
- long sum=0;
- char i;
- for(i=0;i<IO_times;i++)
- {
- sum += getValue();
- }
- return sum/IO_times;
- }
- float Hx711::getWeight(char IO_times)//得出重量值
- {
- long temp;
- temp = getAverageValue(IO_times) - offset;
- return (float)temp/scale;
- }
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楼主: eagler8
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