How many FX3 devices do you have? Is it happening on one chip or multiple chips? Please check with the GPIFtoUSB example and see if you are getting a clock. Please check both, while you receive data using transfer_in in the control center EP0x81.
C:\Program Files (x86)\Cypress\EZ-USB FX3 SDK\1.3\firmware\basic_examples\cyfxgpiftousb
Please attach the firmware which you used. I will see if you have made any changes that may cause this.
Thank you very much for all your messages!
Sorry, I work in a very small company and I has to manage the PCB outsourcing and putting them into operation, etc. for the last 3 months!!! Now, I have a lot of PCB ready to use in stock and I have time to go back to my USB 3.0 project! :D
About the PCLK clock, it was my fault. The clock was at 192 MHz and I noticed I had the 20 MHz filter enable on my oscilloscope!
I will take some time to go into my project again and I will ask you if I have any question!
Thank you again!