3rd Party/Other Boards and Kits

[andrewsi]

Has anyone had any success at all using the external memory mux IP that's included in the BSB files for the Nexys 3 board for use with the EDK? I have followed the instructions to the letter, and while the PSRAM memory region passes the SDK's memory tests, I get garbage when I try to read from the parallel flash (having programmed it in advance and verified its contents with the Adept tool.) I was hoping to use the SDK to generate some apps to store in flash and then just use the simple SREC loader to copy them to PSRAM to run, but since it can't successfully read the flash, I'm stuck. Anybody been successful with this?

[andrewsi · Accepted solution]

Problem solved:  First thing you need to do is write 0x00FF to the base address of the flash chip.  This forces the chip into normal read mode, at which point it works just fine.  (Should've tried this a lot sooner!)