/**
* <summary>
* Changes the current load cell bridge excitation method.
* <para>
* Remember to call the <c>saveToFlash()</c> method of the module if the
* modification must be kept.
* </para>
* <para>
* </para>
* </summary>
* <param name="newval">
* a value among <c>YWeighScale.EXCITATION_OFF</c>, <c>YWeighScale.EXCITATION_DC</c> and
* <c>YWeighScale.EXCITATION_AC</c> corresponding to the current load cell bridge excitation method
* </param>
* <para>
* </para>
* <returns>
* <c>0</c> if the call succeeds.
* </returns>
* <para>
* On failure, throws an exception or returns a negative error code.
* </para>
*/
public int set_excitation(int newval)
{
if (_func == null)
{
throw new YoctoApiProxyException("No WeighScale connected");
}
if (newval == _Excitation_INVALID)
{
return(YAPI.SUCCESS);
}
// our enums start at 0 instead of the 'usual' -1 for invalid
return(_func.set_excitation(newval - 1));
}
private async void onLoad(object sender, RoutedEventArgs e)
{
try {
await YAPI.RegisterHub("usb");
sensor = YWeighScale.FirstWeighScale();
if (sensor == null)
{
await FatalError("No WeighScale connected");
}
display = YDisplay.FirstDisplay();
if (display != null)
{
//clean up
await display.resetAll();
// retreive the display size
w = await display.get_displayWidth();
h = await display.get_displayHeight();
// reteive the first layer
l0 = await display.get_displayLayer(0);
l1 = await display.get_displayLayer(1);
// display a text in the middle of the screen
await l0.selectFont("Large.yfm");
}
await sensor.set_excitation(YWeighScale.EXCITATION_AC);
await YAPI.Sleep(3000);
await sensor.tare();
unit = await sensor.get_unit();
await sensor.registerValueCallback(sensorValueChangeCallBack);
} catch (YAPI_Exception ex) {
await FatalError(ex.Message);
}
timer = new NonReentrantDispatcherTimer();
timer.Interval = new TimeSpan(0, 0, 0, 0, 100);
timer.TickTask = async() => { await dispatcherTimer_Tick(); };
timer.Start();
}