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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

Actually reading and writing support of EPCS takes a lot of space if you use onchip memory for example EP3C25. For my design I made some changes in reading and writing routines and I am able to use small library and read/write to EPCS.

I should mention that if you use EPCS for booting your image and you want to use it for data storage, there is some problems. You need to communicate with EPCS using ALtera's IP core of remote update. How to do it externally it seems that is hidden by Altera (I do not know why).

Other solution. If you do not use remote update IP core.. you can access to EPCS as ordinary serial flash.. In forum a lot of info what kind of chips can change EPCS and using them data throu SPI you can access to FLASH..

Good luck