gnupic: Re: [gnupic] Re: [orders] Re: [gnupic] gpasm hex files, compatibility with odyssey
Subject:
Re: [gnupic] Re: [orders] Re: [gnupic] gpasm hex files, compatibility with odyssey
From:
Tim Allen ####@####.####
Date:
29 May 2007 19:41:44 +0100
Message-Id: <96513F52-1755-42BE-9833-B6D6B1FA5F21@integsys.biz>
Now that you mention it reading a blank chip and writing it back is
not a good test. I will have to dig in to the Odyssey source to see
what's really going on.
It appears that no one else uses this programmer software- can anyone
suggest a better one. We only use Linux / Unix in the labs and I
would prefer one that is configurable and uses the parallel port.
On May 29, 2007, at 2:22 PM, Robert Pearce wrote:
> On Tue, 29 May 2007, Tim Allen ####@####.#### wrote :
>
> First I will echo what David said - trying to re-program the chip
> with what you've just read out of it does not actually test the
> ability to write, especially when the data is all blank!
>
> Other than that:
>> HelloWorld.hex (the output from gpasm)...
>>
>> :020000040000FA
> Note ^^^^^^
>> :100000000F28FF308C0000008C0B032808008E00A6
>> :10001000FF308D0001208D0B0A280E0808000030EB
>> :0E00200065006600FF30860007208609142860
>> :00000001FF
>>
>
> I checked your gpasm output against the file you saved from
> odyssey. They use the same endianism (there are three possible
> representations of the PIC's 14-bit word out there), but I note
> odyssey did not include that first line I've marked above. That's
> an Intel HEX extension for >16bit addressing, so it's rarely needed
> on PICs (never on 14-bit ones). It's possible odyssey doesn't like
> it, so it would be worth deleting it as a quick test.
>
> That said, if an incompatibility of HEX file format produces the
> error message "Couldn't write to program memory" then the author of
> that application should be severely reprimanded!
> --
> Rob Pearce http://www.bdt-home.demon.co.uk
>
> The contents of this | Windows NT crashed.
> message are purely | I am the Blue Screen of Death.
> my opinion. Don't | No one hears your screams.
> believe a word. |
>
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