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ThangND's avatar
ThangND
Icon for New Contributor rankNew Contributor
3 years ago

How to write to EPCS memory without disrupting code execution for DE0-Nano board ?

Hi all, Currently I'm writing my program on DE0-Nano board, which contains an EPCS64 flash memory. My purpose is to save some information of the previous execution of the program, and I have an ide...
FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
3 years ago

Hello,
the question involves a misunderstanding. FPGA configuration (and, if present, embedded processor code) stored in EPCS memory is not executed in user mode, it's loaded to FPGA internal memory after power on reset. EPCS memory can be read and written in user mode, e.g. through ASMI Parallel IP core.

Secondly, Quartus programmer only erases or overwrites the flash sectors specified in .jic file, unless you perform an intentional full erase operation.

Regards,
Frank