USB superspeed peripherals Forum Discussions

We are struggling to get the Sony IMX304 to work correctly with the CX3. The basic problem may be that it is simply too fast / too high resolution to be handled by the MIPI interface, but it is also possible that we just aren't setting things correctly! The output of the 304 is a 4 or 8 line LVDS at 594MHz per channel and we use the Lattice XO2 application to convert this to 4 lane MIPI. Unfortunately, the calculation module in the CX3 firmware always gives some invalid figures when we insert the desired frequencies etc. Can you advise if this is a hopeless case, or if there is a way to get it to work?

Thanks!

Terry

I have a program for image sensor data capture, which can run properly when I download .img to SRAM.

But when I program this .img to I2C EEPROM, which can boot from EEPROM and run. While it run improperly.

maybe USB communication or DMA operation been locked.

Can who tell me why this cause?

I run in superspeed explorer kit (cyusb3014) with a sensor board.

I am interested in using the CX3 for a new project.  The requirements are to stream 640x480 video from an OmniVision OV5640 sensor over USB 2.0 at 15 frames per second.  The CX3 appears like it would be a good fit for this application.  However, I see the Denebola dev kit for the CX3 has a 4 week lead time.  I need something within a couple days.  

Is there an alternate source of these dev kits?  

If not, is there an alternative dev kit that would get me started before custom hardware boards are available?  

And if not, is there an alternative to the CX3, with an available dev kit, that would work for this application?

Thanks...

Hello,

I successfully managed to send a single bitstream of 160KB on I2C.

But the device on the other end is not able to cope with the bitrate, even if my clock is only 100kHz.

Is there a way to insert pauses on this bitstream without adding start/stop condition?

Is it possible to get the source code for the function CyU3PI2cTransmitBytes?

Best regards,

Ludovic

Hi Cypress,

I am using cyusb3014 to transfer image dataflow through UVC, but there is no any image on AMCap.The attached file is dataflow captured by busbound.Is the format of video data wrong? If it's wrong, then what is the correct format?

Thank you! 

Hi,

I am developing a custom camera application derived from the UVC example. I don't need to insert the UVC header for my application, so the CPU does not need to be interrupted to modify the Bulk transfer data on DMA commit. I'm trying to get rid of the Callback by using the DMA in AUTO_MANY_TO_ONE. However the host always reports failed Xfers (0 bytes received) unless I alter the data count value(partially corrupted data due to some skipped bytes in between, but at least I get something). I include my DMA Channel and GPIF setup, maybe I'm just doing something stupid or missing something.

<code>

/* Configure the video streaming endpoint. */
    endPointConfig.enable = 1;
    endPointConfig.epType = CY_U3P_USB_EP_BULK;
    endPointConfig.pcktSize = CY_FX_EP_BULK_VIDEO_PKT_SIZE;
    endPointConfig.isoPkts = 1;
    endPointConfig.burstLen = 16;
    endPointConfig.streams = 0;
    apiRetStatus = CyU3PSetEpConfig(CY_FX_EP_BULK_VIDEO, &endPointConfig);

/* Create a DMA Manual channel for sending the video data to the USB host. */
    dmaMultiConfig.size = CY_FX_UVC_STREAM_BUF_SIZE; // 32kB
    dmaMultiConfig.count = CY_FX_UVC_STREAM_BUF_COUNT; // 3
    dmaMultiConfig.validSckCount = 2;
    dmaMultiConfig.prodSckId[0] = (CyU3PDmaSocketId_t) CY_U3P_PIB_SOCKET_0;
    dmaMultiConfig.prodSckId[1] = (CyU3PDmaSocketId_t) CY_U3P_PIB_SOCKET_1;
    dmaMultiConfig.consSckId[0] = (CyU3PDmaSocketId_t) (CY_U3P_UIB_SOCKET_CONS_0
            | CY_FX_EP_VIDEO_CONS_SOCKET);
    dmaMultiConfig.prodAvailCount = 0;

    dmaMultiConfig.prodHeader = 0; /* 12 byte UVC header to be added. */
    dmaMultiConfig.prodFooter = 0;

    /* 4 byte footer to compensate for the 12 byte header. */
    dmaMultiConfig.consHeader = 0;
    dmaMultiConfig.dmaMode = CY_U3P_DMA_MODE_BYTE;
    dmaMultiConfig.notification = CY_U3P_DMA_CB_CONS_EVENT
            | CY_U3P_DMA_CB_PROD_EVENT;
    dmaMultiConfig.cb = CyFxUvcApplnDmaCallback;
    apiRetStatus = CyU3PDmaMultiChannelCreate(&glChHandleUVCStream,
            CY_U3P_DMA_TYPE_AUTO_MANY_TO_ONE, &dmaMultiConfig);

/* Start the state machine from the designated start state. */

    CyU3PGpifInitDataCounter(0, (CY_FX_UVC_BUF_FULL_SIZE / (BUS_WIDTH / 8)-2),
    RELOAD, UP_COUNT, 1);

</code>

Please let me know if I'm doing something horribly wrong, missing something or if you need additional information.

Thanks in advance.

C++ streamer (EPIN bulk) failed with Altera FPGA writer using a FIFO writing at low clock speed <1MHz and 'slavefifosync' as CYUSB firmware

XferData fails after few 1024KB EPIN Xfer due to HOST non-retry after NRDY condition found on USB traces.

NB : XferData runs OK at high clock speed (100MHz)

See doc attached for detailed description with USB traces taken with LECROY Advisor T3