help me please!!! alt_flash_open_dev return error

Hi

Can you run the memory test - take altera example. It wil show whether you hvae problems with EPCS. Maybe it is some hw problem or pins connection- you have your custom board.

You should check from the software side too - i remind you should use not reduced device drivers (or reduced, i don't remember exactly this should be on altera web-site). Aslo check if epcs device is initialized as the device in the alt_sys_init.c function.

Let me know if you solved your problem.