/// <summary>
/// Close the SPI port
/// </summary>
public void CloseChannel()
{
if (ftHandle == IntPtr.Zero)
{
return;
}
SPIDllDriver.SPI_CloseChannel(ftHandle);
ftHandle = IntPtr.Zero;
}
/// <summary>
/// Get the Information of Channel
/// </summary>
/// <param name="channel">The index of channel</param>
/// <exception cref="FTDIException">When Get channel information failed</exception>
/// <returns>The Device Info Class</returns>
public DeviceInfo GetChannelInfo(uint channel)
{
FTDeviceListInfoNode node = new FTDeviceListInfoNode();
status = SPIDllDriver.SPI_GetChannelInfo(channel, ref node);
if (status != FTStatus.OK)
{
throw new FTDIException(status);
}
return(node);
}
public void SPIInit(uint clock = 30000000, byte latency = 1, SPIConfigOption options = SPIConfigOption.MODE0 | SPIConfigOption.CS_DBUS3 | SPIConfigOption.CS_ACTIVELOW, uint pin = 0)
{
channelconfig = new ChannelConfig();
channelconfig.ClockRate = clock;
channelconfig.LatencyTimer = latency;
channelconfig.configOptions = (uint)options;
channelconfig.Pin = pin;
status = SPIDllDriver.SPI_InitChannel(ftHandle, ref channelconfig);
if (status != FTStatus.OK)
{
throw new FTDIException(status, "Error in initializing spi channel");
}
}
/// <summary>
/// Read From SPI device
/// </summary>
/// <param name="length">The length of data to be read</param>
/// <param name="buffer">The data to be stored</param>
/// <exception cref="FTDIException">When failed to read from the spi channel.</exception>
/// <returns>the real transfered length</returns>
public uint Read(uint length, out byte[] buffer)
{
buffer = new byte[length];
uint sizetransfered = 0;
if (ftHandle == IntPtr.Zero)
{
throw new NullReferenceException("The SPI Interface is not initialized!");
}
status = SPIDllDriver.SPI_Read(ftHandle, ref buffer, (uint)length, ref sizetransfered, (uint)(SPITransferOption.SIZE_IN_BYTES | SPITransferOption.CHIPSELECT_ENABLE | SPITransferOption.CHIPSELECT_DISABLE));
if (status != FTStatus.OK)
{
throw new FTDIException(status, "Error is Reading From SPI bus!");
}
return(sizetransfered);
}
/// <summary>
/// Send data to SPI bus
/// </summary>
/// <param name="buffer">The data to be send</param>
/// <param name="length">The length of data to be send, this number must smaller than the legnth of data</param>
/// <returns>The real length send out</returns>
public uint Write(byte[] buffer, uint length = 0)
{
uint sizetransfered = 0;
if (buffer.Length < length)
{
throw new ArgumentOutOfRangeException("length", "The length given in arguments is out of data length");
}
if (length == 0)
{
length = (uint)buffer.Length;
}
if (ftHandle == IntPtr.Zero)
{
throw new NullReferenceException("The SPI Interface is not initialized!");
}
status = SPIDllDriver.SPI_Write(ftHandle, buffer, length, ref sizetransfered, (uint)(SPITransferOption.SIZE_IN_BYTES | SPITransferOption.CHIPSELECT_ENABLE | SPITransferOption.CHIPSELECT_DISABLE));
if (status != FTStatus.OK)
{
throw new FTDIException(status, "Error is Send data to SPI bus!");
}
return(sizetransfered);
}
/// <summary>
/// Read Write data on SPI
/// </summary>
/// <param name="indata">data send to SPI</param>
/// <param name="outdata">data read from SPI</param>
/// <param name="length">the lenght to send/receive </param>
/// <returns>the real numbers of data sent/received </returns>
public uint ReadWrite(byte[] indata, out byte[] outdata, uint length)
{
uint sizetransfered = 0;
outdata = new byte[length];
if (indata.Length < length)
{
throw new ArgumentOutOfRangeException("length", "The length given in arguments is out of data length");
}
if (length == 0)
{
length = (uint)indata.Length;
}
if (ftHandle == IntPtr.Zero)
{
throw new NullReferenceException("The SPI Interface is not initialized!");
}
status = SPIDllDriver.SPI_ReadWrite(ftHandle, indata, ref outdata, length, ref sizetransfered, (uint)(SPITransferOption.SIZE_IN_BYTES | SPITransferOption.CHIPSELECT_ENABLE | SPITransferOption.CHIPSELECT_DISABLE));
if (status != FTStatus.OK)
{
throw new FTDIException(status, "Error in ReadWrite data on SPI bus!");
}
return(sizetransfered);
}