/// <summary>
/// Opens a SPI slave device.
/// </summary>
/// <param name="bus">The SPI bus number.</param>
/// <param name="chip">The SPI chip select number.</param>
public SpiDevice(int bus, int chip)
{
var ret = NativeSpi.Open(bus, chip, out _handle);
if (ret != Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
/// <summary>
/// Writes the bytes data to the SPI slave device.
/// </summary>
/// <param name="data">The data buffer to write.</param>
public void Write(byte[] data)
{
var length = Convert.ToUInt32(data.Length);
var ret = NativeSpi.Write(_handle, data, length);
if (ret != Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
/// <summary>
/// Reads the bytes data from the SPI slave device.
/// </summary>
/// <param name="buffer">The Data buffer.</param>
public void Read(byte[] buffer)
{
var length = Convert.ToUInt32(buffer.Length);
var ret = NativeSpi.Read(_handle, buffer, length);
if (ret != Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
/// <summary>
/// Disposes the Spi.
/// </summary>
protected virtual void Dispose(bool disposing)
{
if (_disposed)
{
return;
}
NativeSpi.Close(_handle);
_disposed = true;
}
/// <summary>
/// Exchanges the bytes data to the SPI slave device.
/// writeBuffer.Length and readBuffer.Length must be equal.
/// </summary>
/// <param name="writeBuffer">Array containing data to write to the device.</param>
/// <param name="readBuffer">Array containing data read from the dievice.</param>
public void TransferSequential(byte[] writeBuffer, byte[] readBuffer)
{
if (writeBuffer.Length != readBuffer.Length)
{
throw new Exception("writeBuffer.Length is not equal to readBuffer.Length");
}
var buffersLength = Convert.ToUInt32(writeBuffer.Length);
var ret = NativeSpi.Transfer(_handle, writeBuffer, readBuffer, buffersLength);
if (ret != Internals.Errors.ErrorCode.None)
{
throw ExceptionFactory.CreateException(ret);
}
}
