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Altera_Forum's avatar
Altera_Forum
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15 years ago

Flash Access Problems

We have a 3 processor design that all boot successfully from a single CFI flash (all reset addresses are set to our CFI Flash at different addresses). The firmwares run in different On Board Memories. Our design has worked successfully for a number of weeks on a number of different boards.

Recently we have seen the following fault on 2-3 different boards on different occasions :-once all 3 CPUs have been loaded and our single main CPU runs the following function

handle = alt_flash_open_dev(CFI_FLASH_NAME);

if (handle == 0) {//Open Failed

with following define is from system.h file

#define CFI_FLASH_NAME "/dev/CFI_Flash"

The function alt_flash_open_dev fails

in addition, when downloading using flash programmer from eclipse compiler the download fails with error "CFI table not found"

We do not use "reduced device drivers" option in the BSP

We are using Quartus II Ver. 10.1

Can anyone give some help on this

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  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    15 years ago

    google :-) (dekker mutex)

    I've not looked at the sopc mutex component either, I've seen code snippets on here that might be trying to use it - but the interface seemed gross (via open() etc).

    I can imagine implemeting mutex in a logic block with multiple Avalon slaves (one for each master) where a write of '1' would stall writes on the other slaves (ie from the other masters) until a write of '0'.