/// <summary>
/// Creates a new instance of the PiFaceDigital class, used to communicate with a PiFaceDigital or PiFaceDigital2 extension board.
/// </summary>
/// <param name="spiDeviceInformation">The SPI device information.</param>
/// <param name="chipSelectLevel">The chip select line level to use.</param>
public PiFaceDigital(DeviceInformation spiDeviceInformation, byte chipSelectLevel = 0)
{
this._chip = new MCP23S17(spiDeviceInformation, chipSelectLevel);
this.InputPort = new MCP23S17RegisterNeg(MCP23S17RegisterAddresses.GPIOB, this._chip);
this.InputPins = new MCP23S17RegisterBitNeg[8];
this.OutputPort = new MCP23S17Register(MCP23S17RegisterAddresses.GPIOA, this._chip);
this.OutputPins = new MCP23S17RegisterBit[8];
this.LEDs = new MCP23S17RegisterBit[8];
this.Relays = new MCP23S17RegisterBit[2];
this.Switches = new MCP23S17RegisterBitNeg[4];
for (var i = 0; i < 8; i++)
{
if (i < 2)
{
this.Relays[i] = new MCP23S17RegisterBit(i, MCP23S17RegisterAddresses.GPIOA, this._chip);
}
if (i < 4)
{
this.Switches[i] = new MCP23S17RegisterBitNeg(i, MCP23S17RegisterAddresses.GPIOB, this._chip);
}
this.InputPins[i] = new MCP23S17RegisterBitNeg(i, MCP23S17RegisterAddresses.GPIOB, this._chip);
this.OutputPins[i] = new MCP23S17RegisterBit(i, MCP23S17RegisterAddresses.GPIOB, this._chip);
this.LEDs[i] = new MCP23S17RegisterBit(i, MCP23S17RegisterAddresses.GPIOA, this._chip);
}
}
/// <summary>
/// Creates a new instance of the MCP23S17Register class.
/// </summary>
/// <param name="address">The address of the register.</param>
/// <param name="chip">The MCP23S17 chip which contains the register.</param>
internal MCP23S17Register(byte address, MCP23S17 chip) : base(address, chip)
{
this.LowerNibble = new MCP23S17RegisterNibble(Nibble.Lower, address, chip);
this.UpperNibble = new MCP23S17RegisterNibble(Nibble.Upper, address, chip);
this.Bits = new MCP23S17RegisterBit[8];
for (var i = 0; i < this.Bits.Length; i++)
{
this.Bits[i] = new MCP23S17RegisterBit(i, address, chip);
}
}
internal MCP23S17RegisterNibble(Nibble nibble, byte address, MCP23S17 chip) : base(address, chip)
{
this._nibble = nibble;
this.Bits = new MCP23S17RegisterBit[4];
var rangeStart = nibble.GetRangeStart();
var rangeEnd = nibble.GetRangeEnd();
for (var i = rangeStart; i < rangeEnd; i++)
{
this.Bits[i - rangeStart] = new MCP23S17RegisterBit(i, address, chip);
}
}
/// <summary>
/// Creates a new instance of the MCP23S17RegisterBaseNeg class.
/// </summary>
/// <param name="address">The address of the entity.</param>
/// <param name="chip">The MCP23S17 chip which contains the register.</param>
internal MCP23S17RegisterBaseNeg(byte address, MCP23S17 chip) : base(address, chip)
{
}
/// <summary>
/// Instantiate a new MCP23S17 register bit.
/// </summary>
/// <param name="bitOffset"></param>
/// <param name="address"></param>
/// <param name="chip"></param>
internal MCP23S17RegisterBit(int bitOffset, byte address, MCP23S17 chip) : base(address, chip)
{
this._bitOffset = bitOffset;
}
/// <summary>
/// Creates a new instance of the MCP23S17RegisterBase class.
/// </summary>
/// <param name="address">The address of the entity.</param>
/// <param name="chip">The MCP23S17 chip which contains the register.</param>
internal MCP23S17RegisterBase(byte address, MCP23S17 chip)
{
this.Address = address;
this._chip = chip;
}