public override void SetPullUp(int gpioIndex, MadeInTheUSB.GPIO.PinState d)
{
var mcpGpioIndex = gpioIndex - this.GpioStartIndex;
// only 8 bits!
if (mcpGpioIndex > 7)
{
throw new InvalidGpioOperationException(string.Format("Invalid gpio index:{0}", gpioIndex));
}
int gppu = this._i2c.Send1ByteRead1Byte(MCP230XX_GPPU);
if (gppu == -1)
{
throw new InvalidGpioOperationException(string.Format("Command MCP230XX_GPPU({0}) failed gpio index:{1}", MCP230XX_GPPU, gpioIndex));
}
if (d == GPIO.PinState.High)
{ // set the pin and direction
gppu |= (byte)(1 << mcpGpioIndex);
}
else
{
gppu &= (byte)(~(1 << mcpGpioIndex));
}
// write the new GPIO
this._i2c.Send2BytesCommand(MCP230XX_GPPU, (byte)gppu);
}
public override void DigitalWrite(int gpioIndex, MadeInTheUSB.GPIO.PinState d)
{
var gpio = VerifyGpioIndex(gpioIndex);
if (gpio.Mode != PinMode.Output)
{
throw new ArgumentException(string.Format("GPIO {0} is not configured as ouput", gpioIndex));
}
this.SetGpioMask(ComputeMask(GetGpioMask(), gpioIndex, d));
}
//public void SetGpioMask(byte mask)
//{
// SetGPIOMask(mask);
//}
public byte ComputeMask(byte mask, int gpioIndex, MadeInTheUSB.GPIO.PinState d)
{
var mcpIndex = gpioIndex - this.GpioStartIndex;
// only 8 bits!
if (mcpIndex > 7)
{
return(mask);
}
int gpio = mask;
// set the pin and direction
if (d == GPIO.PinState.High)
{
gpio |= (byte)(1 << mcpIndex);
}
else
{
gpio &= (byte)(~(1 << mcpIndex));
}
return((byte)gpio);
}
public virtual void SetPullUp(int p, MadeInTheUSB.GPIO.PinState d)
{
}
public virtual void DigitalWrite(int p, MadeInTheUSB.GPIO.PinState d)
{
}
