private void SetupGpio()
{
if (_gpio_setup)
{
return;
}
ctrl = GpioController.GetDefault();
if (null == ctrl)
{
throw new DeviceNotFoundException("No GPIO controller on this device");
}
/*
* If you get exceptions one the next couple of lines, particularly a message that the pin
* is already in use, or inaccessible, then please ensure you add the line
* <DeviceCapability Name="lowLevel" />
* to the capabilities section of package.appxmanifest in the calling app.
*/
DatPin = ctrl.OpenPin(DAT);
ClockPin = ctrl.OpenPin(CLK);
ClockPin.SetDriveMode(GpioPinDriveMode.Output);
DatPin.SetDriveMode(GpioPinDriveMode.Output);
Show();
_gpio_setup = true;
}
private void ReleaseClockLock()
{
DatPin.Write(GpioPinValue.Low);
for (int count = 0; count < 32; count++)
{
ClockPin.Write(GpioPinValue.High);
ClockPin.Write(GpioPinValue.Low);
}
}
private void write_byte(byte input)
{
int value;
byte modded = Convert.ToByte(input);
for (int count = 0; count < 8; count++)
{
value = modded & 128;
DatPin.Write(value == 128 ? GpioPinValue.High : GpioPinValue.Low);
ClockPin.Write(GpioPinValue.High);
modded = Convert.ToByte((modded << 1) % 256);
ClockPin.Write(GpioPinValue.Low);
}
}
