Ok. I see from the manual EEPROM usage it is not possible from the FPGA.
So, how can I locate an unused sector of the Flash to store persistent data?
Also, where do I get the data format to use in the file for my additional persistent data?
My reason for doing this, is to have some persistent configuration bits for my on FPGA processor, that can be modified from the user host program.
Just a few bits.