Cypress Perform

Home > Design Support > Cypress Developer CommunityTM > Cypress Forums > USB Controllers > Slave FIFO GPIF with fast data transfer

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



Slave FIFO GPIF with fast data transfer
Moderator:
RSKV

Post Reply
Follow this topic



Slave FIFO GPIF with fast data transfer

clh23047 posted on 03 Jul 2012 2:42 PM PST
Top Contributor
65 Forum Posts

Hello, everyone. Now I can run the Slave FIFO Asynchronous example with the evaluation board. I still want to know how to check the transfer speed of the Slave FIFO GPIF. With the UART debugger, I find the data transfer is not so fast in Slave FIFO Asynchronous example. How could I increase the transfer speed and what is the maximum transfer speed we can get?  

Thanks,

Lehua Chen

Re: Slave FIFO GPIF with fast data transfer

clh23047 posted on 04 Jul 2012 01:34 AM PST
Top Contributor
65 Forum Posts

I made a mistake. The Streamer is working! When I increase the frequency (square wave) at the SLWR to 390K (Packets per Xfer 128; Xfers to Queue 16), I can get the Throughput (700KB/s) and the received data are Successes. According to estimation, the measured throughput is reliable.

 
Now what I need to do is increasing the transfer speed with the Slave FIFO Asynchronous. I am only interest in transferring huge data from the FPGA to GPIF and then to PC. Any suggestions to optimize the Slave FIFO Asynchronous example will be appreciated.
 
Thank you,
Lehua Chen

Re: Slave FIFO GPIF with fast data transfer

RSKV posted on 04 Jul 2012 02:31 AM PST
Cypress Employee
655 Forum Posts

Hi Lehua Chen,

Good to know that.

Using "burst" you can increase the throughput. I am not sure whether you tried the USBBulkSourceSink example that comes with the SDK. You can look for "CY_FX_EP_BURST_LENGTH" in that project. Also there is a readme.txt to explain the steps needed to do performance optimizations.

Regards,

sai krishna.

Re: Slave FIFO GPIF with fast data transfer

clh23047 posted on 04 Jul 2012 07:40 AM PST
Top Contributor
65 Forum Posts

Hello, sai Krishna,

Thank you for your reply.
 
I solved the problem now. I also tried Slave FIFO Synchronous example. When the PCLK is connected to 40MHz square wave (limited by the function generator), I get the maximal throughput 115700KB/s. I think this is reasonable.
 
In conclusion, the mistakes made by me are as following:
 
(1) In the Slave FIFO Asynchronous example, I connected the SLWR to constant 0. So the write process can not start. After I connected the SLWR to the function generator, the write process is on. But the frequency on SLWR is only 3KHz, it is two small for the Streamer to check the throughput. Therefore, I always thought the Streamer did not work in the right way.
 
(2) In the Slave FIFO Synchronous example, SLDR can be connected to constant 0 (maybe due to the PCLK). After optimizing as what I did in Bulksourcesink, everything is fine.
 
Thank you for your kind help, Sai Krishna
Lehua Chen

Re: Slave FIFO GPIF with fast data transfer

RSKV posted on 04 Jul 2012 08:02 AM PST
Cypress Employee
655 Forum Posts

It’s my pleasure to help you.

Thanks for posting your learnings in the forum so that the other customers will get benefit out of your posts.

Regards,

sai krishna.



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.