USB superspeed peripherals Forum Discussions

Hi,

FX3 Control IN request fails when the response size is:

    
• multilpe of the packet size (64, 128, 192.. for HS, 512, 1024, 1536.. for SS)
    
• smaller than wLength (if response size equals wLength, no problems occur)
   

The error occurs in PC side (ex, Control Center shows error 997)

but in the firmware side, CyU3PUsbSendEP0Data() returns no error.

I guess, in this situation, the last ZLP may be lost.

In Setup Request callback, calling additional CyU3PUsbSendEP0Data() with 0 bytes length

hides this problem,  like this:

 CyU3PUsbSendEP0Data( bytes, buf );

if( (bytes % glPacketSize) == 0 )

    CyU3PUsbSendEP0Data(0, buf);

This workaround code is Appropriate？

 I attach test project.

This firmware accepts Vendor-IN Request, and response [wValue] bytes.

If wIndex is 1, the workaround is enabled.

Regards.

       From the forum, I found that there are a lot of post disscuss the AN75779 sample. But  when I search the sdk  folder , there are no  AN75779 sample code , and from  "http://www.cypress.com/?rID=57990"  (related files ) I also can not find the sample .  

   There are only two samples about uvc "usbvideoclass" and "usbbulkvideoclass" . And from AN75779 , there is a file named "uvc.c ", but  there are no files named uvc.c.   Ago I think that the AN75779 should be developed by developers, but from forum, it seems that Cypress offer the source code . 

   Is the sample free??  if free how can I get it? thanks!

Hi!

I've build an application in C# wich takes data from a Spartan6 FPGA and put them into a txt file.

I am testing the slave fifo interface (32 bit).

While the Streamer shows a bitrate of 180MB/s, the actual transfer rate is around 8MB/s.

This is the C# code of Streamer that show the bitrate:

 public unsafe void XferData(byte[][] cBufs, byte[][] xBufs, byte[][] oLaps, ISO_PKT_INFO[][] pktsInfo)

        {

            int k = 0;

            int len = 0;

            Successes = 0;

            Failures = 0;

            XferBytes = 0;

            t1 = DateTime.Now;

            for (; bRunning; )

            {

                // WaitForXfer

                fixed (byte* tmpOvlap = oLaps)

                {

                    OVERLAPPED* ovLapStatus = (OVERLAPPED*)tmpOvlap;

                    if (!EndPoint.WaitForXfer(ovLapStatus->hEvent, 500))

                    {

                        EndPoint.Abort();

                        PInvoke.WaitForSingleObject(ovLapStatus->hEvent, 500);

                    }

                }

                if (EndPoint.Attributes == 1)

                {

                    CyIsocEndPoint isoc = EndPoint as CyIsocEndPoint;

                    // FinishDataXfer

                    if (isoc.FinishDataXfer(ref cBufs, ref xBufs, ref len, ref oLaps, ref pktsInfo))

                    {

                        ISO_PKT_INFO[] pkts = pktsInfo;

                        for (int j = 0; j < PPX; j++)

                        {

                            if (pkts.Status == 0)

                            {

                                XferBytes += pkts.Length;

                                Successes++;

                            }

                            else

                                Failures++;

                            pkts.Length = 0;

                        }

                    }

                    else

                        Failures++;

                }

                else

                {

                    // FinishDataXfer

                    if (EndPoint.FinishDataXfer(ref cBufs, ref xBufs, ref len, ref oLaps))

                    {

                        XferBytes += len;

                        Successes++;

                    }

                    else

                        Failures++;

                }

                k++;

                if (k == QueueSz)  // Only update displayed stats once each time through the queue

                {

                    k = 0;

                    t2 = DateTime.Now;

                    elapsed = t2 - t1;

                    xferRate = (long)(XferBytes / elapsed.TotalMilliseconds);

                    xferRate = xferRate / (int)100 * (int)100;

                    // Call StatusUpdate() in the main thread

                    this.Invoke(updateUI);

                    // For small QueueSz or PPX, the loop is too tight for UI thread to ever get service.   

                    // Without this, app hangs in those scenarios.

                    Thread.Sleep(1);

                }

                // Re-submit this buffer into the queue

                len = BufSz;

                EndPoint.BeginDataXfer(ref cBufs, ref xBufs, ref len, ref oLaps);

            } // End infinite loop

        }

And this is the code that I use to write into file:

        public unsafe void WriteToFileThread()

        {

            int bytes = 16384;

            byte[] buffer = new byte[bytes];

            bool bXferCompleted = false;

            bool IsPkt = false;

            CyBulkEndPoint bulkEpt = EndPoint as CyBulkEndPoint;

            if (bulkEpt != null)

                bXferCompleted = bulkEpt.XferData(ref buffer, ref bytes, IsPkt);

            try

            {

                while(true)

                WriteXferData(buffer, bytes, bXferCompleted);

            }

            catch (NullReferenceException e)

            {

                e.GetBaseException();

                this.Invoke(handleException);

            }

        }

What is the problem?

Thank you!

Hi!

I am trying to create a C# application that saves data into a text file when the fx3 is interfacing with a FPGA.

Using the XferData function from CyUSB.dll, i can only get  transfer rates less then 10MB/s (saving into SSD) while your Streamer application show a throughput around 180MB/s.

What is wrong?

Thank you!

I was reading some documentation and found a piece of material similar to what I need,

it's a bitbang implementation for the FX2.

I have the FX3 development kit. what kind of differences should I expect ? 

I am new to this, I would really appreciate your help

  Hello,

I am new to this environment and recently ordered the Cypress EZ-USB FX3 development kit.

My goal is to use this test board in order to do spi writes to another device.

How can I start ? 

I have read all the documentation and little project USBBluk loop auto, but the SPI projects seem to work differently.

I have tried just compiling it and loading it on the board with the same steps, it just hangs at "Programming of SPI Flash in progress".

Is there a library of functions I could use to write my own DLL for example ?

I was trying to find more documentation or guides on the SPI bus, but returned empty handed.

I would really  appreciate any help or advice,

regards

#define VIDEO_LINE_DATA_WIDTH (8272) #define VIDEO_DMA_BUFFER_COUNT (2) #define USB3_MAX_BURST (1) /* was (8) */  /* set up an auto many-to-one DMA channel to send the UVC video stream */  CyU3PMemSet((uint8_t *)&mdmaCfg, 0, sizeof(mdmaCfg));  mdmaCfg.size = VIDEO_LINE_DATA_WIDTH + 16;  mdmaCfg.count = VIDEO_DMA_BUFFER_COUNT * USB3_MAX_BURST;  mdmaCfg.prodSckId[0] = CY_U3P_PIB_SOCKET_0;  mdmaCfg.prodSckId[1] = CY_U3P_PIB_SOCKET_1;  mdmaCfg.prodHeader = 12;  mdmaCfg.prodFooter = 4;  mdmaCfg.consSckId[0] = CY_U3P_UIB_SOCKET_CONS_0 | USB_EP_VIDEO_CONS_SOCKET;  mdmaCfg.validSckCount = 2;  mdmaCfg.dmaMode = CY_U3P_DMA_MODE_BYTE;  mdmaCfg.notification = CY_U3P_DMA_CB_CONS_EVENT | CY_U3P_DMA_CB_ERROR;  mdmaCfg.cb = mdma_cb;   cli_dprintf(1, "Attempting to allocate %d %d-byte buffers (%d KB total) for DMA...\n", mdmaCfg.count, mdmaCfg.size, mdmaCfg.count * mdmaCfg.size / 1024);   apiRetStatus = CyU3PDmaMultiChannelCreate(&dch_video, CY_U3P_DMA_TYPE_MANUAL_MANY_TO_ONE, &mdmaCfg);  if (apiRetStatus != CY_U3P_SUCCESS) {   cli_dprintf(1, "could not create video DMA channel (%d)\n", apiRetStatus);   CyFxAppErrorHandler(apiRetStatus);  }

   status = CyU3PDmaMultiChannelGetBuffer(&dch_video, &dmabuf, CYU3P_NO_WAIT);    if (status == CY_U3P_SUCCESS) {      /* replace DMA data here, see comment below */      len = sizeof(uvc_header);     if (dmabuf.count == VIDEO_LINE_DATA_WIDTH) {      uvc_add_header(dmabuf.buffer - len, CyFalse);     } else {      uvc_add_header(dmabuf.buffer - len, CyTrue);      gotPartial = CyFalse;     }      if (status != lastgetbufferstatus) {      cli_dprintf(1, "getbuffer change: 0x%x -> 0x%x\n", lastgetbufferstatus, status);      lastgetbufferstatus = status;     }      status = CyU3PDmaMultiChannelCommitBuffer(&dch_video, dmabuf.count + len, 0);     if (status == CY_U3P_SUCCESS) {      ++tx_count;     }      if (status != lastcommitstatus) {      cli_dprintf(1, "commitbuffer change: 0x%x -> 0x%x\n", lastcommitstatus, status);      lastcommitstatus = status;     }    }     /* if everything produced has been consumed, restart DMA */    if (hitFV && tx_count == rx_count && ! gotPartial) {     tx_count = rx_count = 0;     hitFV = CyFalse;      uvc_header[1] ^= UVC_HEADER_FRAME_ID;     CyU3PDmaMultiChannelReset(&dch_video);     CyU3PDmaMultiChannelSetXfer(&dch_video, 0, 0);    }

The programmer manual, lists (7.1.3 cyfxbulklpmanual – MANUAL Channel) as an example.  I can not find it anywhere.  Can you give me a link to the examples listed in the programmers manual?