Re: [Usbpicprog-technical] 18f45k22

[Frans S. <fra...@gm...>]

Dear Matt Hirsch,

Thanks for the patches. I have reviewed the code and committed it to the
git repository.
Just made a few changes to your code:
-The new pic families should be added to the end of the enum for
backward compatibility.
-I have removed the debugging cout lines.

Regards,

Frans

On 02/20/2011 12:01 PM, Matt Hirsch wrote:
> I finally gotten around to doing this.
>
> I've attached two patches against the 0.4.2 beta release, one for the
> firmware source tree, and one for usbpicprog. I had to add new entries
> to PicFamily, which is why usbpicprog needed to be updated. I've tried
> to make the code changes minimally invasive, but please let me know if
> there's anything that needs cleaning up.
>
> I've tested this as working with a 18f45k22 using a 9v regulator on
> Vpp. The 18lf versions of these parts require a lower voltage (<3.6V)
> Vdd/PGC/D. It looks like this should be possible, so I added an XML
> file and entry for the LF part as well, but I think code changes to
> the firmware will be necessary to provide the low voltage versions of
> the PGC/D signals.
>
> My XML files are missing the C compiler tags, since I'm not sure where
> you're pulling these from. I couldn't find an obvious place in the
> MCC18 headers. The SDCC tags seem irrelevant, since SDCC doesn't
> support the 18F4XK22 parts.
>
> Thanks,
> Matt
>
> On 01/31/2011 10:48 AM, Matt Hirsch wrote:
>> Frans,
>>
>> Thanks for the pointers. I noticed you use mcc18 to compile the
>> firmware. (Or at least your Makefile is setup that way). Do you use
>> the commercial version? Or will it be ok to use the lite version? I
>> also see #defines for sdcc - is this a valid option to compile the
>> firmware?
>>
>> Thanks,
>> Matt
>>
>> On 01/31/2011 03:54 AM, Frans Schreuder wrote:
>>> Dear Matt,
>>>
>>> I think the sourcecode of the PC application doesn't have to be altered
>>> for that, only the .xml files.
>>> Only in the firmware some small modifications will have to be done.
>>> Also the hardware can't just program these devices since it gives a VPP
>>> of 12V where the 18f45K22 has a maximum VPP of 9V.
>>> A very simple solution for this will be a 9V zener diode over the VPP
>>> pin so that it won't exceed this limit.
>>>
>>> I don't see any other problems for implementing this device.
>>>
>>> Kind regards,
>>>
>>> Frans Schreuder
>>>
>>>
>>> On 01/31/2011 09:06 AM, Matt Hirsch wrote:
>>>> I was thinking of attempting to modify usbpicprog to program the 
>>>> 18f45k22. The programming spec is similar, with minor differences, to 
>>>> the PIC18F2XXX/4XXX family:
>>>>
>>>> http://ww1.microchip.com/downloads/en/DeviceDoc/39622L.pdf
>>>> vs
>>>> http://ww1.microchip.com/downloads/en/DeviceDoc/41398B.pdf
>>>>
>>>> And I see many parts from that first family are on the tested list.
>>>>
>>>> Should something like this process work?:
>>>> http://sourceforge.net/mailarchive/forum.php?thread_name=4C035FBD.9030506%40gmail.com&forum_name=usbpicprog-technical 
>>>> <http://sourceforge.net/mailarchive/forum.php?thread_name=4C035FBD.9030506%40gmail.com&forum_name=usbpicprog-technical>
>>>>
>>>> I guess I will have to create a new family.
>>>>
>>>> I'd appreciate any comments.
>>>>
>>>> Best,
>>>> Matt
>>>>
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