USB superspeed peripherals Forum Discussions

I’m trying to add audio control features to my FX3 based UVC system to control volume and mute. My system currently supports audio but does not have any audio descriptor to control volume and mute options. I’m modifying the descriptor to support that, however I don’t see a way in API document to get and audio events.

Does anyone know how to handle audio set up commands?

Hi,

I am working on SD_card write operation, we want to write data to SD card, the data which is considered by the 512bytes in firmware and the data is not copying to the buffer.

static void

CyFxBulkSrcSinkFillInBuffers (

        void)

{

    CyU3PReturnStatus_t stat;

    CyU3PDmaBuffer_t    buf_p;

    uint16_t            index = 0;

    CyU3PDmaCbType_t  type;

    /* Now preload all buffers in the MANUAL_OUT pipe with the required data. */

    for (index = 0; index <50; index++)

    {

        stat = CyU3PDmaChannelGetBuffer (&glChHandleBulkSrc, &buf_p, CYU3P_NO_WAIT);

        for(i=0;i<=512;i++)

        {

        buf_p.buffer=READBUFFER;

        }

        if (type == CY_U3P_DMA_CB_XFER_CPLT)

        {

        if (stat != CY_U3P_SUCCESS)

        {

        stat= CyU3PSibReadWriteRequest(0, 0,

              4, 2, 0, 0);

        }

        }

      //  CyU3PMemSet (buf_p.buffer, CY_FX_BULKSRCSINK_PATTERN, buf_p.size);

        stat = CyU3PDmaChannelCommitBuffer (&glChHandleBulkSrc,512, 0);

    }

Creating the DMA channel i.e CPU to Socket 0.

Please find the below attachment.

Regards,

Dhanuja

Dear Sir,

I want to output a pwm duty from 1% ~ 99%, but it seems the pwm duty is not predicted, which is also be found in the following!

https://community.cypress.com/thread/17950?q=FX3%20PWM%20duty

I think it may be SDK API bug. when CyU3PGpioComplexUpdate () is called, the timer shall be stopped and cleared ,and then start again according to the new count, just like restart init procedure.

  apiRetStatus = CyU3PGpioComplexUpdate (LED_PWM_PIN, count, CY_FX_PWM_PERIOD);

Can Cypress FAE confirm this issue?

Best，

Hi Cypress,

I am working on a project on FX3. This application consists of a GPIF interface and a USB BULK IN endpoint. The GPIF interface works as SLAVE. The master writes data to the FX3. And, the PC gets the data from USB BULK IN endpoint. My question is:

How can I know the exact number of DMA slots are occupied? As if the PC know this number, it can issue exact number of URBs to get the data without continuously polling the USB BULK IN endpoint? Any API can do so?

Thanks,

Jason

I have to generate the PWM Signals from FX3 about 100 Hz to 5 kHz.

I have connected to Complex GPIF ( 18,19, 20, 21).

This is fine or I can generate the PWM from simple GPIF?

Regarding the USB3.0 Emphasis (TX), Swing Level Equalizer (RX), Is there a way to change the setting with FX3  FW?

If possible , please share the operation document  mentioned above.

Best Regards

Arai

I would like to record a constant flow of 32-bits data (using an external  synch clock - 50MHz). Can I do it with the Synch FIFO example ?
For the moment I can receive data but every 1024 bytes there is a "gap" in my received data.

Hi I am looking into using NetX with an FX3.

I cannot find any of the functions described in the NetX_User_Guide (cannot find anything that starts with nx_ )

Is there a particular header file needed to be included to access these?

I am aware ThreadX is only provided in binary form, but I would expect the API calls to be exposed to the developer in a header file or something.

Final question, is there a guide for using NetX or generally ThreadX OS services with the FX3?

Thanks,

Levi Riley