I have a problem with external FLASH memory (P25Q32SH) but only on newly purchased boards.
I have two boards bought about a year ago and everything works fine on them.
On the new ones bought about 2 months ago, access to the external FLASH memory does not work.
I checked the physical connection between FPGA and FLASH and it is correct.
Also the GOWIN programmer, when trying to program using the "exFlash Erase, Program thru GAO-Bridge" option, reports the error: spi flash not found.
Have you encountered such a problem.
Is it possible that there are faulty memories on the boards?
Fake Tang Nano boards?