Hi NurAiman_M_Intel,

Thanks for answering my post.

Using a EPCQ/EPCS16, this works fine and has done for years. The handle returned from the function (alt_flash_open_dev("/dev/epcs_controller")) gives reference to a memory address in the SRAM (because I've instantiatied a variable in SDRAM); data sheet states that as long as the returned value isn't zero, then the operation has been successful.

Using the EPCQ32, (same footprint and pinout [using ASx1 mode and not ASx4]), the point where I can step the code to the line where alt_flash_open_dev("/dev/epcs_controller") is, returns '0x0', which is indicative of failure to open/read/communicate device. I'm going to scope it up to see if there is actually a bit stream fired off at this point to see if the NIOS II processor actually attempts a transaction.

In Quartus I've instructed the AS device to be EPCQ32, and not Auto.

I'm totally stumped! The device is brand new, I can upload the sof to it without issue, I can erase the IC though NIOS II flash programmer, so I know something is transacting, just when it comes to the firmware trying to interact with the Flash IC, I can't perform the instruction because it hangs..

Thank you for any help.

Regards,

Matthew