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Altera_Forum's avatar
Altera_Forum
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15 years ago

Flash doesn't work in NiosII

Hi all I want to read and write the 1MB 29LV800TE-90PFTN flash on DE2. I add a tri-state bridge and connect a CFI to it in the sopc builder and connect the pins as the demon does. 1 When...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I had this same problem and it took me a day to find it. If you peruse the DE2 example pin assignments you find a pin for the flash that is not passed on to the flash core in the nios2 cpu.

make sure that that pin - FL_RST_N (PIN_AA18) is driven high to enable the flash in your top level entity. this is NOT taken care of for you by the flash core.

edit: The pin assignment is only for my particular DE2 board, it may be different in your revision.