We are trying to send data from C# application to spartan 6 board through USB fx3 and spartan 6 will write the same data through USB fx3 to c# application.
We are able to send the data but unable to receive it back.
For fx3 firmware i have used application note AN65974 and firmware code available with it.
Also i wanted to know which function to use #define STREAM_IN_OUT or #define LOOPBACK_SHRT_ZLP present in the firmware.
Looking for support on the above mentioned issue.
You need to use #STREAM_IN_OUT.
Are you looping back the data correctly from the FPGA? Create a technical support case in Cypress.com