TMS320C5535: TMS320C5535 USB_DMA_Example

Hi Team,

Is there any update on this?

Thanks,

Connie

Hi Connie,

I'm looking into the issue. I'll try to have a response by Friday.

Regards,
Frank

Kishan,

Can you please confirm this example is from CSL 3.0? 

https://software-dl.ti.com/dsps/dsps_public_sw/dsps_swops_houston/C55X/latest/index_FDS.html

Regards,
Frank

Hi Frank,

Kishan will look into your question tomorrow. They want to provide more background:

We want to make an application which can recognize our Recorder device on Windows and Android OS over MTP protocol.  

We have to implement a filesystem with MTP protocol and the communication interface should be USB in DMA mode.

The DSP we are using is TMS320C5535. The device will record an audio. When user connects the device to the host PC using USB, The file browser window should be popped up in a host platform and user can copy, move and delete the Audio encoded files to Host platform.

Currently we are facing issues with USB enumeration, device is sending device descriptor but host is not getting it.

We are looking for some example code, which has USB DMA mode enabled and enumeration is successful.

Let me know if there are sample code applicable to them.

Thanks,

Connie

Hello Frank,

I see "csl_general.h" file at location "C:\ti\c55_lp\c55_csl_3.08.01\inc" which described chip version and revision history.

After looking to revision history, we can say that this example is from CSL v3.08.

Regards,

Kishan Patel 

Hi Kishan,

I'm unable to reproduce a USB enumeration problem with the CSL_USB_DmaExample_Out example.

I was able to build & execute the CSL_USB_DmaExample_Out example on a C5535 eZdsp.

I used the tool versions mentioned in this e2e thread: https://e2e.ti.com/support/tools/ccs/f/code-composer-studio-forum/981570/question-about-most-up-to-date-ccs-and-software-components-to-install-for-dsp-bios-and-c55xx-devices

I connected the eZdsp USB port to a Windows 10 PC, and the example works as expected.

The CSL_USB_MSC_dmaExample might be more applicable for your system since it includes USB MSC. I was able to build & execute this example on the eZdsp, and it also works as expected.

I notice the CSL builds for C5517 by default, see <CSL>/inc/csl_general.h. Did you modify the macros in the file to build for C5535?

Regards,
Frank

Hi Frank,

Yes, I modified macros in <CSL>/inc/csl_general.h file and build it. I re-run the csl_usb_dma_example(built for C5535). But again I am facing the issue with USB enumeration. I don't have TI's TMS320C5535 eZdsp board. I have attached a snapshot of error.