public static EdInterfaceObd.InterfaceErrorResult InterfaceSetConfig(int baudRate, int dataBits, EdInterfaceObd.SerialParity parity, bool allowBitBang)
{
if (_handleFtdi == (IntPtr)0)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
try
{
Ftd2Xx.FT_STATUS ftStatus;
_currentBaudRate = baudRate;
_currentWordLength = dataBits;
_currentParity = parity;
#if USE_BITBANG
bool bitBangOld = _bitBangMode;
if (allowBitBang && _currentBaudRate <= 19200)
{
_bitBangMode = true;
}
else
{
_bitBangMode = false;
}
if (_bitBangMode)
{
byte[] sernum = new byte[16];
byte[] desc = new byte[64];
ftStatus = Ftd2Xx.FT_GetDeviceInfo(_handleFtdi, out _bitBangDeviceType, out _bitBangDeviceId, sernum, desc, IntPtr.Zero);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
int divisor;
switch (_bitBangDeviceType)
{
case Ftd2Xx.FT_DEVICE.FT_DEVICE_232R:
// tested range: 1-59
// good values: 27, 29!, 33, 35
divisor = 29; // only odd values allowed!
_bitBangBitsPerSendByte = 12000000 / divisor / _currentBaudRate;
_bitBangBitsPerRecByte = 12000000 / 16 / _currentBaudRate + 2;
return(EdInterfaceObd.InterfaceErrorResult.DeviceTypeError);
case Ftd2Xx.FT_DEVICE.FT_DEVICE_232H:
divisor = 120000000 / 2 / 50 / 9600;
_bitBangBitsPerSendByte = 120000000 / 2 / divisor / _currentBaudRate;
_bitBangBitsPerRecByte = _bitBangBitsPerSendByte;
break;
default:
return(EdInterfaceObd.InterfaceErrorResult.DeviceTypeError);
}
if (_bitBangMode != bitBangOld)
{
// set al to input to prevent start glitch
ftStatus = Ftd2Xx.FT_SetBitMode(_handleFtdi, 0x00, Ftd2Xx.FT_BITMODE_ASYNC_BITBANG);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetDivisor(_handleFtdi, (UInt16)divisor);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetTimeouts(_handleFtdi, WriteTimeout, WriteTimeout);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetUSBParameters(_handleFtdi, BitBangRecBufferSize, 0x10000);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
if (!SetBitBangOutput(_bitBangOutput))
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetBitMode(_handleFtdi, (byte)(BitBangBits.Dtr | BitBangBits.Rts | BitBangBits.Txd), Ftd2Xx.FT_BITMODE_ASYNC_BITBANG);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_Purge(_handleFtdi, Ftd2Xx.FT_PURGE_TX | Ftd2Xx.FT_PURGE_RX);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
}
return(EdInterfaceObd.InterfaceErrorResult.NoError);
}
#endif
byte parityLocal;
switch (parity)
{
case EdInterfaceObd.SerialParity.None:
parityLocal = Ftd2Xx.FT_PARITY_NONE;
break;
case EdInterfaceObd.SerialParity.Even:
parityLocal = Ftd2Xx.FT_PARITY_EVEN;
break;
case EdInterfaceObd.SerialParity.Odd:
parityLocal = Ftd2Xx.FT_PARITY_ODD;
break;
case EdInterfaceObd.SerialParity.Mark:
parityLocal = Ftd2Xx.FT_PARITY_MARK;
break;
case EdInterfaceObd.SerialParity.Space:
parityLocal = Ftd2Xx.FT_PARITY_SPACE;
break;
default:
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
byte wordLengthLocal;
switch (dataBits)
{
case 5:
wordLengthLocal = Ftd2Xx.FT_BITS_5;
break;
case 6:
wordLengthLocal = Ftd2Xx.FT_BITS_6;
break;
case 7:
wordLengthLocal = Ftd2Xx.FT_BITS_7;
break;
case 8:
wordLengthLocal = Ftd2Xx.FT_BITS_8;
break;
default:
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetBitMode(_handleFtdi, 0x00, Ftd2Xx.FT_BITMODE_RESET);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetUSBParameters(_handleFtdi, UsbBufferSizeStd, UsbBufferSizeStd);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetBaudRate(_handleFtdi, (uint)baudRate);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_SetDataCharacteristics(_handleFtdi, wordLengthLocal, Ftd2Xx.FT_STOP_BITS_1, parityLocal);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
ftStatus = Ftd2Xx.FT_Purge(_handleFtdi, Ftd2Xx.FT_PURGE_TX | Ftd2Xx.FT_PURGE_RX);
if (ftStatus != Ftd2Xx.FT_STATUS.FT_OK)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
}
catch (Exception)
{
return(EdInterfaceObd.InterfaceErrorResult.ConfigError);
}
return(EdInterfaceObd.InterfaceErrorResult.NoError);
}