Re: fxload to restictive with address range

[David Brownell <david-b@pacbell.net>]

Kay Sievers wrote:
> 
> I've successfull loaded the firmware into the device with a modified fxload.
> Unfortunately fxload does not support the address range of this chip.
> I changed the following lines and everything is working well.

Better to teach it about that particular chip,
rather than break every standard an21 or fx chip;
just add a new "-t type" option.  "fxload" is
100% correct for the devices it claims to support!

I glanced briefly at that analog.com webpage and
couldn't find any technical specs whatever; so it's
not clear how to handle your particular chip.

Or as a workaround, just use the two stage loader.
If it's EZ-USB compatible, "a3load.hex" should work.

- Dave



> --- ezusb.c     2003-05-18 22:15:20.000000000 +0200
> +++ ezusb.c.orig        2002-04-12 06:08:01.000000000 +0200
> @@ -64,8 +64,8 @@
>      /* with 8KB RAM, 0x0000-0x1b3f can be written
>       * we can't tell if it's a 4KB device here
>       */
> -    if (addr <= 0x7b3f)
> -     return ((addr + len) > 0x7b40);
> +    if (addr <= 0x1b3f)
> +     return ((addr + len) > 0x1b40);
>  
>      /* there may be more RAM; unclear if we can write it.
>       * some bulk buffers may be unused, 0x1b3f-0x1f3f
> @@ -361,7 +361,7 @@
>           return -3;
>       }
>  
> -     if ((len * 2) + 11 > strlen(buf)) {
> +     if ((len * 2) + 11 >= strlen(buf)) {
>           fprintf (stderr, "record too short?\n");
>           return -4;
>       }
> 
> 
> 
> I expect more devices of this kind to appear in the future.
> Maybe somebody can check, how to be prepared for larger internal RAM sizes.
> 
> 
> Have a good day
> 
> Kay Sievers
> 
> 





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