private void sw_spi_init()
{
var gpio = GpioController.GetDefault();
if (gpio != null)
{
SWSpiDataPin = gpio.OpenPin(DataPin);
SWSpiDataPin.Write(GpioPinValue.Low);
SWSpiDataPin.SetDriveMode(GpioPinDriveMode.Output);
SWSpiClockPin = gpio.OpenPin(ClockPin);
SWSpiClockPin.Write(GpioPinValue.Low);
SWSpiClockPin.SetDriveMode(GpioPinDriveMode.Output);
}
}
private void sw_spi_out(byte n)
{ // Bitbang SPI write
for (int i = 8; 0 != i--; n <<= 1)
{
if (0x80 == (n & 0x80))
{
SWSpiDataPin.Write(GpioPinValue.High);
}
else
{
SWSpiDataPin.Write(GpioPinValue.Low);
}
SWSpiClockPin.Write(GpioPinValue.High);
SWSpiClockPin.Write(GpioPinValue.Low);
}
}
private void sw_spi_end()
{ // Stop 'soft' SPI
SWSpiDataPin.SetDriveMode(GpioPinDriveMode.Input);
SWSpiClockPin.SetDriveMode(GpioPinDriveMode.Input);
}