Cypress Perform

Home > Design Support > Cypress Developer CommunityTM > Cypress Forums > USB Controllers > How to enable multiple transactions??

Bookmark and Share
Cypress Developer CommunityTM
Forums | Videos | Blogs | Training | Rewards Program | Community Components



How to enable multiple transactions??
Moderator:
RSKV

Post Reply
Follow this topic



How to enable multiple transactions??

Poturaju posted on 07 Feb 2012 7:12 AM PST
Top Contributor
26 Forum Posts

 

Hi,

How to enable multiple transactions (2 or 3) per micro frame on isochroous endpoint.

Thanks

Subbarao.




Re: How to enable multiple transactions??

aasi posted on 08 Feb 2012 02:35 AM PST
Cypress Employee
1073 Forum Posts

When you say 3 to 2 transaction, are you talking about the number of packets transferred in a microframe?

Regards,

Anand



Re: How to enable multiple transactions??

Poturaju posted on 08 Feb 2012 03:20 AM PST
Top Contributor
26 Forum Posts

 Yes,

I want to transfer more than 1 packet per micro frame.



Re: How to enable multiple transactions??

aasi posted on 08 Feb 2012 05:05 AM PST
Cypress Employee
1073 Forum Posts

Please look at isoPkts

of CyU3pEpConfig_t. You've to change the descriptor and take care there is enough buffer for data transferred for the entire microframe is there.

Cheers,

Anand



Re: How to enable multiple transactions??

Poturaju posted on 08 Feb 2012 06:01 AM PST
Top Contributor
26 Forum Posts

 I have modified as below 

 

CyU3pEpConfig_t.isoPkts = 2;

 

or

 

CyU3pEpConfig_t.isoPkts = 3;

 

fx3 is being detected as UVC device and if tried to run the preview the following error is occuring.

 

"CyU3PSetEpConfig failed, Error Code = 77"

 

I don't know why is this happening.

 

Can you please help me?

 

Thanks

Subbarao.



Re: How to enable multiple transactions??

Poturaju posted on 13 Feb 2012 01:12 AM PST
Top Contributor
26 Forum Posts

 Hi all,

Any help on this issue?

Thanks

Subbarao.






ALL CONTENT AND MATERIALS ON THIS SITE ARE PROVIDED "AS IS". CYPRESS SEMICONDUCTOR AND ITS RESPECTIVE SUPPLIERS MAKE NO REPRESENTATIONS ABOUT THE SUITABILITY OF THESE MATERIALS FOR ANY PURPOSE AND DISCLAIM ALL WARRANTIES AND CONDITIONS WITH REGARD TO THESE MATERIALS, INCLUDING BUT NOT LIMITED TO, ALL IMPLIED WARRANTIES AND CONDITIONS OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT OF ANY THIRD PARTY INTELLECTUAL PROPERTY RIGHT. NO LICENSE, EITHER EXPRESS OR IMPLIED, BY ESTOPPEL OR OTHERWISE, IS GRANTED BY CYPRESS SEMICONDUCTOR. USE OF THE INFORMATION ON THIS SITE MAY REQUIRE A LICENSE FROM A THIRD PARTY, OR A LICENSE FROM CYPRESS SEMICONDUCTOR.

Content on this site may contain or be subject to specific guidelines or limitations on use. All postings and use of the content on this site are subject to the Terms and Conditions of the site; third parties using this content agree to abide by any limitations or guidelines and to comply with the Terms and Conditions of this site. Cypress Semiconductor and its suppliers reserve the right to make corrections, deletions, modifications, enhancements, improvements and other changes to the content and materials, its products, programs and services at any time or to move or discontinue any content, products, programs, or services without notice.