Cypress Perform

Home > Design Support > Cypress Developer CommunityTM > Cypress Forums > USB Controllers > Using GPIF II to configure FPGA then switch to slave FIFO

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



Using GPIF II to configure FPGA then switch to slave FIFO
Moderator:
RSKV

Post Reply
Follow this topic



Using GPIF II to configure FPGA then switch to slave FIFO

Nazila posted on 09 Apr 2012 2:56 PM PST
Top Contributor
55 Forum Posts

Hi,

I am trying to understand if it is possible to configure an FPGA using GPIF II (32-bit slave selectMAP) which requires the GPIF be configured as Master mode. Then switch GPIF to slave FIFO mode. I am wondering if you have an example.

Based on my understanding, in my case I cannot have disjoint state machines because one is master and one is slave. So, if I define two separate GPIF II projects, how I should configure the chip after completing the FPGA configuration? At the moment when I load a firmware to cypress, I cannot load any other firmware until a power down then up happens.

Also, I need to have an enable/disable signal along with the data path to implement a non-continuous FPGA configuration. If I choose any available GPIO, will it be synchronze with the data (for instance, it will be working with PCLK = 80MHz rate)?

Thanks,

Nazila

Re: Using GPIF II to configure FPGA then switch to slave FIFO

Lumpi6 posted on 10 Apr 2012 10:59 PM PST
Top Contributor
183 Forum Posts

 Hi Nazila!

you can and have to reload the GPIF II designs just use see post disable and load function gpif functions.

http://www.cypress.com/?app=forum&id=167&rID=60662

You also can choose a better configuration for more GPIF designs at the designer, see post... Then you do not have to rename the configuratin structures all the time.

http://www.cypress.com/?app=forum&id=167&rID=60039

 

For enable and disable use one of the 32 bit data lines if you just need 16-bit data for fpga configuration.

Hope this helps out.

Regards 

Lumpi



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.