Cypress Perform

Home > Design Support > Cypress Developer CommunityTM > Cypress Forums > USB Controllers > Clarification on global variables across warm reset

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



Clarification on global variables across warm reset
Moderator:
RSKV

Post Reply
Follow this topic



Clarification on global variables across warm reset

dschneider posted on 12 Nov 2011 12:37 AM PST
Senior Member
17 Forum Posts

From the release notes: "When the warm reset functionality of the CyU3PDeviceReset() API is used, any global variables used by the application will not be properly re-initialized. This is because the startup code that initializes these variables would have been lost and cannot be executed again without loading the application again. If warm reset is needed, the application code must ensure that all necessary data is saved and restored or re-initialized as required."

However, in my tests I have found that static global variables are indeed reset, or perhaps just zeroed out.

Could you please clarify on what global variables are not reset during a warm reset?

Thanks.




Re: Clarification on global variables across warm reset

aasi posted on 16 Nov 2011 07:11 AM PST
Cypress Employee
1073 Forum Posts

Hi,

As the document says "any global variable" so all global variables will come into picture. Please let me know if you've a issue with this, we can work on it to find a solution.

Regards,

Anand






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.