Dewesoft C++ DLL to Trenz Electronic C# DLL Porting Guide
How to write C# programs using the new DLL starting from the old DLL.

Introduction

There are some major differences between the two DLLs.

• Example: in TE0300DLL.dll, the buffer size is fixed to 2 kbyte, while in TE_USB_FX2_CyAPI.dll you are free to choose 4 kbyte or more.

  Function translation

  Dewesoft C++ DLL	Trenz Electronic C# DLL
  HANDLE m_handle = 0;	CyUSBDevice TE_USB_FX2_USBDevice = null; USBDeviceList USBdevList = new USBDeviceList(CyConst.DEVICES_CYUSB); The handles are internally managed by CyAPI.lib and there is no need to expose them to the user.
  cout << endl << TE0300_ScanCards() << endl;	int NumberOfCardAttached = TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_ScanCards(ref USBdevList); Console.WriteLine(" {0} ", NumberOfCardAttached);
  TE0300_Open(&m_handle, 0)!=0	TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_Open (ref TE_USB_FX2_USBDevice, ref USBdevList, 0) == false
  TE0300_Open(&m_handle, 1)!=0	TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_Open (ref TE_USB_FX2_USBDevice, ref USBdevList, 1) == false
  TE0300_Close(&m_handle);	TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_Close (ref USBdevListToDispose);
  TE0300_SendCommand(handle, cmd, cmd_length, reply, &reply_length, timeout)	TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand (ref TE_USB_FX2_USBDevice, ref cmd, ref cmd_length, ref reply, ref reply_length, TIMEOUT_MS)

  
  Note 1:
  TE_USB_FX2_Open(TE_USB_FX2_USBDevice, USBdevList, x) acts more as a SelectCard() function because the list of USB devices is already created in USBdevList. TE_USB_FX2_USBDevice is the selected device number x.
  Note 2:
  In the code, it is possible to call TE_USB_FX2_Open() where TE0300_Open() is used.In the code, it is not recommended to call TE_USB_FX2_Close() where TE0300_Close() is used. This function differs from its homonym of the previous TE0300DLL.dll in that it does not close a Handle but disposes (erases) all USB devices in the list USBdevList.
  If you want to close the current USB device (card) without opening another one, you shall use TE_USB_FX2_Open() with a device number (CardNumber) that certainly does not exist (e.g. CardNumber = 200, because there can be a maximum of 127 USB devices connected to a single host controller). The reason of this behavior is due to the CyUSB.dll as explained by Cypress document CyUSB.NET.pdf, pages 132-133 and pages 139-140: "You should never invoke the Dispose() method of a USBDevice directly. Rather, the appropriate technique is to call the Dispose() method of the USBDeviceList object that contains the USBDevice objects".

  Unmanaged C++ TE_USB_FX2_Open() of TE_USB_FX2_CyAPI.dll	You can use this function to select the desired module without the need to call TE_USB_FX2_Close() before. Though doing so would not cause any problems. Close is automatically realized by the TE_USB_FX2_Open() function, if a handle to the driver is already open (i.e. TE_USB_FX2_Open() has been successfully called before).
  Managed C# TE_USB_FX2_Open() of TE_USB_FX2_CyUSB.dll	You can use this function to select the desired module without the need to call TE_USB_FX2_Close() before. This function is not necessary.

  Unmanaged C++ TE_USB_FX2_Close() of TE_USB_FX2_CyAPI.dll	It can be freely called but it is rare that you would ever need to call TE_USB_FX2_Close() explicitly (though doing so would not cause any problems).
  Managed C# TE_USB_FX2_Close() of TE_USB_FX2_CyUSB.dll	It cannot be freely called and it is rare that you would ever need to call TE_USB_FX2_Close() explicitly. Furthermore, if it is used in the wrong way, the program can raise exceptions.

  Dewesoft C++ DLL

  Trenz Electronic C# DLL

  void ResetFX2FifoStatus(HANDLE handle) { cout << endl << "Resetting all FIFOs" << endl; byte cmd[64], reply[64]; int cmd_length = 64; int reply_length = 64; cmd[0] = 0xA4;//command RESET_FIFO_STATUS cmd[1] = 0;//RESET all FIFOs if (TE0300_SendCommand(handle, cmd, cmd_length, reply, &reply_length, 1000)) cout << "Error" << endl; cmd[0] = 0xA0;//command INITIALIZE cmd[1] = 1;//FIFO mode if (TE0300_SendCommand(handle, cmd, cmd_length, reply, &reply_length, 1000)) cout << "Error" << endl; }

  static void ResetFX2FifoStatus(CyUSBDevice TE_USB_FX2_USBDevice) { if (TE_USB_FX2_USBDevice == null) { Console.WriteLine("Error,no device is selected"); return; } Console.WriteLine("Resetting all FIFOs"); byte[] cmd = new byte[64]; byte[] reply = new byte[64]; int cmd_length = 64; int reply_length = 64; uint TIMEOUT_MS = 100000; cmd[0] = (byte)FX2_Commands.RESET_FIFO_STATUS; cmd[1] = 0; //reset all fifos if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref cmd, ref cmd_length, ref reply, ref reply_length, TIMEOUT_MS) == false) Console.WriteLine("Error Send Command Reset all fifos"); cmd[0] = (byte)FX2_Commands.INITALIZE; //0xA0;//command INITIALIZE cmd[1] = 1;//FIFO mode if (TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_SendCommand(ref TE_USB_FX2_USBDevice, ref cmd, ref cmd_length, ref reply, ref reply_length, TIMEOUT_MS) == false) Console.WriteLine("Error Switch Mode Fifo Mode"); }

  Dewesoft C++ DLL

  Trenz Electronic C# DLL

  void ReadData(unsigned int handle) { int packetlen = RX_PACKET_LEN; unsigned int packets = 1200; byte * data; unsigned int total_cnt = 0; unsigned int errors = 0; data = new byte [RX_PACKET_LEN*packets]; //allocate memory ResetFX2FifoStatus(handle); SendFPGAcommand(handle,FX22MB_REG0_START_TX); //starts test ElapsedTime.Start(); //StopWatch start for (unsigned int i = 0; i < packets; i++) { packetlen = RX_PACKET_LEN; if (TE0300_GetData(handle, data+total_cnt, &packetlen, PI_EP6,TIMEOUT_MS)) { cout << "ERROR" << endl; errors++; break; } total_cnt += packetlen; } TheElapsedTime = ElapsedTime.Stop(false); //DEBUG StopWatch timer SendFPGAcommand(handle,FX22MB_REG0_STOP); //stops test delete data; }

  static void ReadDataFPGAIntegrity(CyUSBDevice TE_USB_FX2_USBDevice, int BUFFER_SIZE, uint TIMEOUT_MS) { if (TE_USB_FX2_USBDevice == null) { Console.WriteLine("Error,no device is selected"); return; } int packetlen = RX_PACKET_LEN; int packets = 1200; byte[] data = new byte[packetlen*packets]; byte[] buffer = new byte[packetlen]; int total_cnt = 0; int errors = 0; int PI_EP6 = 6; bool bResultXfer = false; ResetFX2FifoStatus(TE_USB_FX2_USBDevice); SendFPGAcommand(ref TE_USB_FX2_USBDevice, MB_Commands.FX22MB_REG0_START_TX, TIMEOUT_MS); //starts test test_cnt = 0; total_cnt = 0; Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); for (int i = 0; i < packets; i++) { packetlen = RX_PACKET_LEN; //fixed (byte* buf = &data[total_cnt]) //bResultXfer = TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_GetDataP(ref inEndpointPipeNo, buf, ref packetlen, PI_EP6, TIMEOUT_MS); bResultXfer = TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_GetData(ref TE_USB_FX2_USBDevice, ref buffer, ref packetlen, PI_EP6, TIMEOUT_MS,BUFFER_SIZE); Buffer.BlockCopy(buffer,0, data, total_cnt, packetlen); if (bResultXfer == false) { Console.WriteLine("Error Get Data"); errors++; break; } total_cnt += packetlen; } stopWatch.Stop(); TimeSpan ts = stopWatch.Elapsed; SendFPGAcommand(ref TE_USB_FX2_USBDevice, MB_Commands.FX22MB_REG0_STOP, TIMEOUT_MS); //stops test }

  Dewesoft C++ DLL

  Trenz Electronic C# DLL

  void WriteData(unsigned int handle) { int packetlen = TX_PACKET_LEN; unsigned int packets = 1200; byte * data; unsigned int total_cnt = 0; unsigned int errors = 0; data = new byte [TX_PACKET_LEN*packets]; //allocate memory //SetData (data); ResetFX2FifoStatus(handle); SendFPGAcommand(handle,FX22MB_REG0_START_RX); //starts test ElapsedTime.Start(); //StopWatch start for (unsigned int i = 0; i < packets; i++) { packetlen = TX_PACKET_LEN; if (TE0300_GetData(handle, data+total_cnt, &packetlen, PI_EP8,TIMEOUT_MS)) { cout << "ERROR" << endl; errors++; break; } total_cnt += packetlen; } TheElapsedTime = ElapsedTime.Stop(false); //DEBUG StopWatch timer SendFPGAcommand(handle,FX22MB_REG0_STOP); //stops test delete data; }

  static void WriteData(CyUSBDevice TE_USB_FX2_USBDevice, int BUFFER_SIZE, uint TIMEOUT_MS) { if (TE_USB_FX2_USBDevice == null) { Console.WriteLine("Error,no device is selected"); return; } int packetlen = TX_PACKET_LEN; int packets = 1200; byte[] data = new byte[packetlen*packets]; byte[] buffer = new byte[packetlen]; int total_cnt = 0; int errors = 0; int PI_EP8 = 8; //SetData (data); bool bResultXfer = false; ResetFX2FifoStatus(TE_USB_FX2_USBDevice); SendFPGAcommand(ref TE_USB_FX2_USBDevice, MB_Commands.FX22MB_REG0_START_RX, TIMEOUT_MS); //starts test test_cnt = 0; total_cnt = 0; Stopwatch stopWatch = new Stopwatch(); stopWatch.Start(); for (int i = 0; i < packets; i++) { packetlen = TX_PACKET_LEN; Buffer.BlockCopy(data,total_cnt, buffer, 0, packetlen); bResultXfer = TE_USB_FX2.TE_USB_FX2.TE_USB_FX2_GetData(ref TE_USB_FX2_USBDevice, ref buffer, ref packetlen, PI_EP6, TIMEOUT_MS,BUFFER_SIZE); if (bResultXfer == false) { Console.WriteLine("Error Get Data"); errors++; break; } total_cnt += packetlen; } stopWatch.Stop(); TimeSpan ts = stopWatch.Elapsed; SendFPGAcommand(ref TE_USB_FX2_USBDevice, MB_Commands.FX22MB_REG0_STOP, TIMEOUT_MS); //stops test }

   

  Document Change History

  version	date	author	description
  0.9	2012-06-01	SP, FDR	Release Preview.
  1.0			Initial release.
  1.1	2013-04-23	SP	Improved description of TE_USB_FX2_Open() and TE_USB_FX2_Close() functions