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RLFlash-FS: EFS fdelete issue

@Marc Crandall

Hello,

I'm using an LPC1788 with RTX and RL-FlashFS with a EFS configured on a NOR chip.

I have setup a flash device description file to use 4KB sectors instead of 64kB blocks.

Here is a snippet:

#define FLASH_DEVICE                               \ 
    DFB(0x1000, 0x300000),    /* Block Size 4kB */ \ 
    DFB(0x1000, 0x301000),    /* Block Size 4kB */ \ 
    DFB(0x1000, 0x302000),    /* Block Size 4kB */ \ 
    DFB(0x1000, 0x303000),    /* Block Size 4kB */ \ 
    DFB(0x1000, 0x304000),    /* Block Size 4kB */ \ 

....


#define FL_NSECT    256

My issue is that sometimes when I delete a file using fdelete(file) several files are deleted.

(depends what files are on the file system and in what order they were added)

Now I started tracing the NOR function calls and this is what I observed:

fdelete: f:\\bar_button_double.png
norflash_program_page: 80300ff8
norflash_program_page: 80300ff0

fdelete: f:\\INDEX.HTM
norflash_program_page: 80322ff0
norflash_program_page: 80322fe8


fdelete: f:\\waterdrop.png
norflash_program_page: 8031eff8
norflash_program_page: 8031eff0
norflash_erase_sector: 8031e000

The 3rd fdelete (waterdrop.png) actually deleted several other files. The obvious difference is the erase call.

  • Does anyone know what is going on?

  • Are samller block/sector sizes better or worse for EFS?

Thanks.

M

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