I am not able to program an EPCQ16A with an NIOS based design.
- Works OK with non-NIOS design until a NIOS deisgn is used. Once the NIOS design is downloaded the PROM appears locked. It can no longer be successfully erased or programmed.
- I have tried erasing without a design file being specified (to clear all locations).
- NIOS design will operate if loaded in the FPGA using a JTAG link.
- Same thing happens on serveral different boards.
The EPCQ16A is returning an ID of 0x14, where I was expecting 0x15 according to the datasheet.
Hardware: Cyclone IV (EP4CE22) and EPCQ16A.
IDE: Quartus Prime 18.1.0 Lite Edition.
Programmer: Terasic USB Blaster.
The EPCQ16A connected directly to Blaster (non-JTAG).
I am guessing that the problem I am seeing may have something to do with the NVCR register in PROM.
Any information/experience that can be shared to overcome this problem would be greatly appreciated.
Darryl
