private void InitLibAndHandle()
{
FtResult result;
if (_handle != IntPtr.Zero)
{
return;
}
LibMpsse.Init();
result = LibMpsseSpi.SPI_OpenChannel(_spiConfig.ChannelIndex, out _handle);
CheckResult(result);
if (_handle == IntPtr.Zero)
{
throw new SpiChannelNotConnectedException(FtResult.InvalidHandle);
}
result = LibMpsseSpi.SPI_InitChannel(_handle, ref _cfg);
CheckResult(result);
_currentGlobalConfig = _cfg;
}
private void EnforceRightConfiguration()
{
if (_currentGlobalConfig.configOptions != _cfg.configOptions)
{
LibMpsseSpi.SPI_ChangeCS(_handle, _cfg.configOptions);
_currentGlobalConfig = _cfg;
}
}
protected FtResult Read(byte[] buffer, int sizeToTransfer, out int sizeTransfered, FtSpiTransferOptions options)
{
EnforceRightConfiguration();
return(LibMpsseSpi.SPI_Read(_handle, buffer, sizeToTransfer, out sizeTransfered, options));
}