private void Button_Click(object sender, RoutedEventArgs e)
{
/*
* How to Calibrate Your Scale:
* 1. Call set_scale() with no parameter.
* 2. Call tare() with no parameter.
* 3. Place a known weight on the scale and call get_units(10).
* 4. Divide the result in step 3 to your known weight. You should get about the parameter you need to pass to set_scale.
* 5. Adjust the parameter in step 4 until you get an accurate reading.
*/
if (!inMidCalibration)
{
txt_results.Text = "";
appendLine("==Calibration==", txt_results);
rawNull = hx711b.getRawWeight(AVG_NUM);
inMidCalibration = true;
appendLine("Now set an object with a known weight, and press 'calibrate' again.", txt_results);
//txt_offset.Text = offset.ToString();
}
else
{
float knownWeight = float.Parse(txt_knownWeight.Text);
float rawWeight = hx711b.getRawWeight(AVG_NUM);
hx711b.setParameters(rawNull, rawWeight, knownWeight);
appendLine("", txt_results);
appendLine("Your weight scale is", txt_results);
appendLine(hx711b.Scale.ToString(), txt_results);
appendLine("Your weight offset is", txt_results);
appendLine(hx711b.Offset.ToString(), txt_results);
txt_scale.Text = hx711b.Scale.ToString();
txt_offset.Text = hx711b.Offset.ToString();
inMidCalibration = false;
appendLine("==Done Calibrating==", txt_results);
appendLine("==Testing==", txt_results);
appendLine("You currenty weighing (should be " + knownWeight.ToString() + "):", txt_results);
float rw = hx711b.getWeight(AVG_NUM);
appendLine(hx711b.transform(rw).ToString(), txt_results);
appendLine("Raw data:", txt_results);
appendLine(rw.ToString(), txt_results);
}
}
public MainPage()
{
this.InitializeComponent();
gpio = GpioController.GetDefault();
slk = gpio.OpenPin(SLK_PIN);
dout = gpio.OpenPin(DOUT_PIN);
hx711b = new LinearHX(dout, slk, 128);
hx711b.power_down();
Debug.WriteLine("down");
hx711b.power_up();
Debug.WriteLine("up");
hx711b.setParameters(BEST_OFFSET, BEST_SCALE);
txt_offset.Text = BEST_OFFSET.ToString();
txt_scale.Text = BEST_SCALE.ToString();
}