internal byte Read(mcp23s17Register port)
{
ISpiTransferBuffer transferBuffer = spiConnection.CreateTransferBuffer(3, SpiTransferMode.ReadWrite);
transferBuffer.Tx[0] = CMD_READ;
transferBuffer.Tx[1] = (byte)port;
transferBuffer.Tx[2] = 0;
var result = spiConnection.Transfer(transferBuffer);
return(transferBuffer.Rx[2]);
}
private int Write(Mcp23S17Register port, byte data)
{
ISpiTransferBuffer transferBuffer = this.spiConnection.CreateTransferBuffer(3, SpiTransferMode.Write);
transferBuffer.Tx[0] = CmdWrite;
transferBuffer.Tx[1] = (byte)port;
transferBuffer.Tx[2] = data;
var result = this.spiConnection.Transfer(transferBuffer);
return(result);
}
private int Write(mcp23s17Register port, byte data)
{
ISpiTransferBuffer transferBuffer = spiConnection.CreateTransferBuffer(3, SpiTransferMode.Write);
transferBuffer.Tx[0] = CMD_WRITE;
transferBuffer.Tx[1] = (byte)port;
transferBuffer.Tx[2] = data;
var result = spiConnection.Transfer(transferBuffer);
return(result);
}
internal byte Read(Mcp23S17Register port)
{
ISpiTransferBuffer transferBuffer = this.spiConnection.CreateTransferBuffer(3, SpiTransferMode.ReadWrite);
transferBuffer.Tx[0] = CmdRead;
transferBuffer.Tx[1] = (byte)port;
transferBuffer.Tx[2] = 0;
var result = this.spiConnection.Transfer(transferBuffer);
return(transferBuffer.Rx[2]);
}
/// <summary>
/// Starts the SPI data transfer.
/// </summary>
/// <param name="buffer">The transfer buffer that contains data to be send and/or the received data.</param>
/// <returns>An <see cref="int"/> that contains the result of the transfer operation.</returns>
public int Transfer(ISpiTransferBuffer buffer)
{
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
var request = Interop.Interop.GetSpiMessageRequest(1);
var structure = buffer.ControlStructure;
var result = deviceFile.Control(request, ref structure);
result.ThrowOnPInvokeError <SendSpiMessageException>("Can't send SPI message. Error {1}: {2}");
return(result);
}
/// <summary>
/// Creates a new instance of the <see cref="Tlc59711Connection"/> class and initializes it.
/// </summary>
/// <param name="connection">A open SPI connection</param>
/// <param name="initializeWithDefault">If <c>true</c> the SPI connection will be initialized with common data transfers settings.</param>
/// <param name="numberOfDevices">Number of <see cref="ITlc59711Device"/>s connected together.</param>
public Tlc59711Connection(INativeSpiConnection connection, bool initializeWithDefault, int numberOfDevices) {
if (ReferenceEquals(connection, null))
throw new ArgumentNullException("connection");
if (numberOfDevices <= 0)
throw new ArgumentOutOfRangeException("numberOfDevices", "You need at least one device.");
this.connection = connection;
if (initializeWithDefault) {
connection.SetBitsPerWord(BITS_PER_WORD);
connection.SetSpiMode(SPI_MODE_0);
connection.SetMaxSpeed(SPEED);
connection.SetDelay(DELAY);
}
var requiredMemorySize = numberOfDevices * Tlc59711Device.COMMAND_SIZE;
transferBuffer = connection.CreateTransferBuffer(requiredMemorySize, SpiTransferMode.Write);
deviceCluster = new Tlc59711Cluster(transferBuffer.Tx, numberOfDevices);
}
protected override void EstablishContext()
{
// SPI control structure we expect to see during the P/Invoke call
controlStructure = new SpiTransferControlStructure
{
BitsPerWord = BITS_PER_WORD,
Length = 5,
Delay = DELAY,
ChipSelectChange = 1,
Speed = SPEED_IN_HZ
};
controlDeviceMock = new Mock <ISpiControlDevice>();
controlDevice = controlDeviceMock.Object;
controlDeviceMock.Setup(x => x.Control(It.IsAny <uint>(), ref It.Ref <SpiTransferControlStructure> .IsAny)).Returns(IOCTL_PINVOKE_RESULT_CODE);
connection = new NativeSpiConnection(controlDevice);
bufferMock = new Mock <ISpiTransferBuffer>();
buffer = bufferMock.Object;
bufferMock.Setup(x => buffer.ControlStructure).Returns(controlStructure);
}
protected override void EstablishContext()
{
// SPI control structure we expect to see during the P/Invoke call
controlStructure = new SpiTransferControlStructure
{
BitsPerWord = BITS_PER_WORD,
Length = 5,
Delay = DELAY,
ChipSelectChange = 1,
Speed = SPEED_IN_HZ
};
controlDevice = A.Fake <ISpiControlDevice>();
A.CallTo(() => controlDevice.Control(A <uint> .Ignored, ref controlStructure))
.WithAnyArguments()
.Returns(IOCTL_PINVOKE_RESULT_CODE);
connection = new NativeSpiConnection(controlDevice);
buffer = A.Fake <ISpiTransferBuffer>();
A.CallTo(() => buffer.ControlStructure)
.Returns(controlStructure);
}
/// <summary>
/// Sets up the transfer buffer for reading input pins;
/// </summary>
private void CreateReusableBufferForInputPolling()
{
inputPollBuffer = spiConnection.CreateTransferBuffer(3, SpiTransferMode.ReadWrite);
inputPollBuffer.Tx[0] = CMD_READ;
inputPollBuffer.Tx[1] = (byte)mcp23s17Register.GPIOB;
inputPollBuffer.Tx[2] = 0;
}
protected override void BecauseOf()
{
buffer = connection.CreateTransferBuffer(REQUESTED_SIZE, SpiTransferMode.ReadWrite);
}
protected override void BecauseOf() {
buffer = new SpiTransferBuffer(REQUESTED_SIZE, SpiTransferMode.Read);
}
protected override void Cleanup() {
if (!ReferenceEquals(buffer, null)) {
buffer.Dispose();
buffer = null;
}
}
/// <summary>
/// Starts the SPI data transfer.
/// </summary>
/// <param name="buffer">The transfer buffer that contains data to be send and/or the received data.</param>
/// <returns>An <see cref="int"/> that contains the result of the transfer operation.</returns>
public int Transfer(ISpiTransferBuffer buffer)
{
if (buffer == null) {
throw new ArgumentNullException("buffer");
}
var request = Interop.GetSpiMessageRequest(1);
var structure = buffer.ControlStructure;
var result = deviceFile.Control(request, ref structure);
result.ThrowOnPInvokeError<SendSpiMessageException>("Can't send SPI message. Error {1}: {2}");
return result;
}
protected override void BecauseOf()
{
buffer = connection.CreateTransferBuffer(REQUESTED_SIZE, SpiTransferMode.ReadWrite);
}
protected override void BecauseOf()
{
buffer = new SpiTransferBuffer(REQUESTED_SIZE, SpiTransferMode.Read);
}
protected override void EstablishContext()
{
// SPI control structure we expect to see during the P/Invoke call
controlStructure = new SpiTransferControlStructure {
BitsPerWord = BITS_PER_WORD,
Length = 5,
Delay = DELAY,
ChipSelectChange = 1,
Speed = SPEED_IN_HZ
};
controlDevice = A.Fake<ISpiControlDevice>();
controlDevice
.CallsTo(device => device.Control(A<uint>.Ignored, ref controlStructure))
.WithAnyArguments()
.Returns(IOCTL_PINVOKE_RESULT_CODE);
connection = new NativeSpiConnection(controlDevice);
buffer = A.Fake<ISpiTransferBuffer>();
buffer
.CallsTo(b => b.ControlStructure)
.Returns(controlStructure);
}
protected override void EstablishContext()
{
controlDevice = A.Fake<ISpiControlDevice>();
controlDevice
.CallsTo(device => device.Control(A<uint>.Ignored, A<SpiTransferControlStructure[]>.Ignored))
.Returns(IOCTL_PINVOKE_RESULT_CODE);
connection = new NativeSpiConnection(controlDevice);
// SPI control structure we expect to see during the P/Invoke call
controlStructure = new SpiTransferControlStructure {
BitsPerWord = BITS_PER_WORD,
Length = 5,
Delay = DELAY,
ChipSelectChange = 1,
Speed = SPEED_IN_HZ
};
buffer = A.Fake<ISpiTransferBuffer>();
buffer
.CallsTo(b => b.ControlStructure)
.Returns(controlStructure);
// setup fake collection to return our "prepared" fake buffer
collection = A.Fake<ISpiTransferBufferCollection>();
collection
.CallsTo(c => c.Length)
.Returns(1);
collection
.CallsTo(c => c.GetEnumerator())
.ReturnsLazily(call => new List<ISpiTransferBuffer>{buffer}.GetEnumerator());
}
