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Altera_Forum's avatar
Altera_Forum
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15 years ago

cann't open epcs_flash_controller

I want to used epcs4 as flash to store some data, but I always get the same result NULL, when i use the alt_flash_open_dev() function. I am sure the hardware is ok because I can program my file to e...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I have written a simple program to write and read the epcs flash that takes approx 6KB of space using the hello_world_small as my starting template. I am running this on the EP3C16 (DE0) board where I've declared an 8KB onchip ram.

I couldn't get the serial flash working until I modified my alt_sys_init.c file and added:

# define ALT_USE_EPCS_FLASH

before the line:# include "altera_avalon_epcs_flash_controller.h"

According to the documentation, it sounded like I needed to do this in my main.c file prior to calling main(). Perhaps they meant my alt_sys_init.c file... anyways, this worked.

Cheers,

-Terry