private I2cDeviceRegister OLAT; //Pin latches register
/// <summary>
/// Creates a mcp23008 port expander
/// </summary>
/// <param name="slaveAddress">i2c address of the chip.</param>
/// <returns></returns>
public async static Task<Mcp230xx> CreateMcp23008(int slaveAddress, int interruptPin = -1)
{
var device = await GetDevice(slaveAddress);
var iPin = interruptPin == -1 ? null : GenericGpioController.GetDefault().OpenPin(interruptPin);
var expander = new Mcp230xx(device, 0x00, 0x01, iPin);
expander.InterruptActiveValue = GpioPinValue.High;
return expander;
}
/// <summary>
/// Creates a new mcp23017 port expander
/// </summary>
/// <param name="slaveAddress">i2c address of the chip.</param>
/// <returns></returns>
public async static Task<Mcp230xx[]> CreateMcp23017(int slaveAddress, int interruptPin = -1)
{
var registerAddresses = new byte[] { 0x00, 0x01 };
var expanders = new Mcp230xx[2];
var device = await GetDevice(slaveAddress);
var iPin = interruptPin == -1 ? null : GenericGpioController.GetDefault().OpenPin(interruptPin);
for (var i = 0; i < registerAddresses.Length; i++)
{
var expander = new Mcp230xx(device, registerAddresses[i], 0x02, iPin);
expander.InterruptMirrorEnabled = true;
expander.InterruptActiveValue = GpioPinValue.Low;
expanders[i] = expander;
}
return expanders;
}
