Thanks a lot for your help
Finally this is what I did:
$ objcopy -I ihex -O binary file.hex file.bin
$ dd if=file.bin of=file_full_range.bin count=1 bs=32768 (18f2550
memory size in bytes)
$ objcopy -I binary -O ihex file_full_range.bin
file_ready_for_bootloader.hex
Opening the files with a hex editor everything seems to be OK but I haven't
tested it yet. If I do, I'll let you know.
Several things:
- I haven't been able to convince objcopy that the output size is 32768 or
whatever, and so, not needing to use dd, do you know how to do it?
- Option bs in dd is: "read and write BYTES bytes at a time". So I needed
to add count=1 to copy just (count times bs) = 1 x 32768 = 32768 bytes
- Doing that, if original hex is smaller than 32768 dd doesn't fill with
zeroes or anything. I needed to include fuses in original file.hex (fuses
are on a very high address location) and so, file.bin is something like
this:
Program code
Zeroes
Zeroes
Zeroes
Fuses
After dd, file_full_range.bin is:
Program code
Zeroes
Zeroes (ending exactly on address 32768-1=32767 and without fuses as
intended)
Thank you very much
On Sat, Jan 28, 2012 at 5:56 PM, Unix Savvy Brian <bw...@value.net> wrote:
> Diego --
>
> Look at 'objcopy', after doing the link. It can translate formats.
> You might be
> able to convince it the output size is 4K ( or some other "round number" )
> in
> order to fill unused memory. I've used the full-blown GNU version on
> 32-bit
> systems and it is quite flexible. Output format of binary will strip
> COFF headers.
>
>
> If that doesn't do it and you have UNIX tools, after using 'objcopy'
> to strip the
> header, try using 'dd' to get to a specific size....
> dd if=myprog.bin of=readyfordownload.bin bs=4096
>
> The 'bs=N' would be the size required by your loader to fill all of
> memory. 'dd'
> will fill the extra bytes with zeros.
>
>
> I'm just a lurker.....
>
>
> HTH,
> *brianW
>
>
>
>
>
> On Sat, Jan 28, 2012 at 4:06 AM, Diego Herranz
> <diegoherr...@diegoherranz.com> wrote:
> > Hi!
> >
> > I want to use a bootloader (Scene Double bootloader) for PIC16 and it
> > requires to export the full program memory range of your application
> (even
> > unused range), with no eeprom nor fuses.
> >
> > This is the exact text present in the bootloader manual:
> >
> >>
> >> Exporting a HEX File from MPLAB
> >>
> >>
> >>
> >> Once you have written some firmware (using Sample Application as a
> guide)
> >> you will need to provide a hex file to format for
> >> use with the Bootloader.
> >> DO NOT use the hex file generated directly by MPLAB when you compile the
> >> application, as this may not include the full
> >> memory range (we need a file of a known size), and also contains
> >> configuration bits which we do not want.
> >> Instead, compile and the choose File->Export. Set it to only output
> >> Program Memory (no EEPROM or configuration bits). The
> >> memory range should be the whole range of the device (or, choose the
> start
> >> to be the starting address of your user
> >> application space, which is 0x2400 in the Sample Application example,
> and
> >> then end to be the top program memory
> >> address in the device).
> >
> >
> > Does anybody know how to do this with SDCC?
> > Is it related to linker as gplink is generating the COFF file from which
> the
> > hex file is finally created?
> >
> > Thanks a lot.
> >
> >
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