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Altera_Forum's avatar
Altera_Forum
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16 years ago

fopen - Memory Mapped Files

Is there a way to have fopen read a file whose contents reside in flash/ram (i.e. not from stdin/stdout rs232/jtag)? Using the nios-ide, I flashed a file into Flash where I have plenty of space...
Altera_Forum's avatar
Altera_Forum
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16 years ago

If your file resides in CFI flash then would it work to just cast it as a char array? You'd have nice access for reads, but you'd have to manage the sector-at-a-time issues of flash when writing (erasing/programming).

If not, then if it's read-only access you're after, rozip_fs might be enough. Otherwise, you're looking at more work to emulate filesystem-like behavior and/or porting an existing filesystem to Nios II HAL.

Of course, none of this applies if you're using uClinux/Linux running on Nios II.

Cheers,

- slacker