I use sst flash 39vf6401 on my borad.When I need to progamme the flash, I should add a CFI table .Then I can download the programme to the flash successfully. But I can not open the flash while alt_flash_open_dev(). The return value of alt_flash_open_dev() is always wrong. If any one know something about it, please help me ,Thank you !

who can help me? Please say someting

You've got all the C source for the code you are running - so you should be able to track down which test is failing - so what data is incorrect. No one else can know!

if I use open epcs via alt_flash_open_dev(), I can get the right value, and I can read and write epcs memory successfully. but I can't open my flash use alt_flash_open_dev()

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.

Hi uilka_b (http://www.alteraforum.com/forum/member.php?u=10640)! Thank you very much for you reply!!! In my project, the reset vector is define to a flash , and I can programe the flash through the nios flash programing. But I have to add CFI table for the SST flash. Can I say my flash was correctly used? I have seen some people say that if the reset vector is to one flash, this flash can not be open in nios by alt_flash_open_dev. Is that true? By the way, I can use the same code to open and control my epcs all correctly,(because I have not use the epcs as the boot loader flash?) Can you give me some advice about how to open my boot loader flash? Because the epcs flash is to slow to erase and write. Thanks again!

help me please!!! alt_flash_open_dev return error

15 Replies

Altera_Forum
Honored Contributor
15 years ago
But as I understand you can flash the cfi flash using the Flash programmer, don't you?
What specific problem do you have so you need to write theCFI table to your flash?
Altera_Forum
Honored Contributor
15 years ago
--- Quote Start ---
But as I understand you can flash the cfi flash using the Flash programmer, don't you?
What specific problem do you have so you need to write theCFI table to your flash?
--- Quote End ---

thank you!

if I don't add cfi table,I will fail to program the flash.

my problem is that I can not open the flash in nios.the return value of alt_flash_open_dev is always '0'
Altera_Forum
Honored Contributor
15 years ago
--- Quote Start ---
thank you!

if I don't add cfi table,I will fail to program the flash.

my problem is that I can not open the flash in nios.the return value of alt_flash_open_dev is always '0'
--- Quote End ---

delphicgp, do you use "reduced device drivers" option in the BSP?
Altera_Forum
Honored Contributor
15 years ago
try different and slow serial frequencies. I had the same problem and when I reduce the freq it start working.
Altera_Forum
Honored Contributor
14 years ago
Call the alt_flash_open_dev function only when operating in single-threaded mode.

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help me please!!! alt_flash_open_dev return error

15 Replies

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