public MCP23008(Nusbio nusbio, NusbioGpio sdaPin, NusbioGpio sclPin, int gpioStartIndex = 8)
: base(nusbio, sdaPin, sclPin)
{
this._gpioStartIndex = (byte)gpioStartIndex;
for (var i = 0; i < this.GetMaxGPIO(); i++)
{
base.AddGPIO(MCP230XX_Base.BuildGpioName(this.GpioStartIndex + i), PinMode.Output, true);
}
}
public void SetPinMode(byte gpioIndex, MadeInTheUSB.GPIO.PinMode mode)
{
var k = MCP230XX_Base.BuildGpioName(gpioIndex);
if (this.GPIOS.ContainsKey(k))
{
this.GPIOS[k].Mode = mode;
}
else
{
throw new ArgumentException(string.Format("Gpio {0} not available", gpioIndex));
}
var mcpIndex = gpioIndex - this.GpioStartIndex;
if (mcpIndex > (this.GetMaxGPIO() - 1))
{
throw new ArgumentException(string.Format("Gpio {0} not available", gpioIndex));
}
int iodir = this._i2c.Send1ByteRead1Byte(MCP230XX_IODIR);
if (iodir == -1)
{
throw new ArgumentException(string.Format("Cannot read state of MCP230XX"));
}
if (mode == GPIO.PinMode.Input || mode == GPIO.PinMode.InputPullUp)
{
iodir |= (byte)(1 << mcpIndex);
}
else
{
iodir &= (byte)(~(1 << mcpIndex));
}
if (!this._i2c.Send2BytesCommand(MCP230XX_IODIR, (byte)iodir))
{
throw new ArgumentException(string.Format("Cannot set state of MCP230XX"));
}
if (mode == GPIO.PinMode.InputPullUp)
{
this.SetPullUp(gpioIndex, PinState.High);
}
if (mode == GPIO.PinMode.Input)
{
this.SetPullUp(gpioIndex, PinState.Low);
}
}