gnupic: Re: [gnupic] p18f parallel port programmer for PIC18F4550
Subject:
Re: [gnupic] p18f parallel port programmer for PIC18F4550
From:
Ben Dugan ####@####.####
Date:
14 Dec 2005 22:19:42 +0000
Message-Id: <43A09A72.3040408@curdes.com>
Jay,
Your questions are not at all stupid; these things get pretty confusing.
The programmer I mentioned earlier does not need a "hardware programmer"
but does require you to make a special cable. There's a pdf schematic
for the cable in the zipped archive[1], and that schematic also attempts
to show you what's needed for the in-circuit device (a few pull-ups, one
pull-down).
But: the program I wrote (p18f.c) is specifically for a PIC18F4550 and
would need modifications to work with other chips.
I think my advice would be for you to keep googling, reading the GNUPIC
list stuff, until you find a combination of tools that will work in your
specific case.
Ben
[1] http://www.curdes.com/gnupic/GnuPic.html
Jay Dagenais wrote:
> Here is a bit of a stupid question from a newbie, but with that parallel
> port programmer, does one still have to use a hardware programmer, or
> does this take the place of the typical hardware programmer? I am trying
> to program a variety of PICs, from the 18F252 to the 10F206, and want to
> know if I can use an in circuit programmer such as this as opposed to
> using the typical hardware type of programmer. There are so many
> different types of designs out there that I am just confused as all heck
> about how to proceed. Most of the free designs out there are based
> around an old type of pic, like the 16c series, and I don't work with
> any of the 16 series or any of the 'C' types of pics, and don't even
> really know what the differences are between the types. Basically, if
> somebody could point me into the right direction, that would really help
> me out at this point, as I am lost here. Ideally I would like to have a
> programmer or a method that could program as many different types of
> PICs as possible using the same device or software for all of them, if
> there is such a thing. Something running through Windows would be great,
> but something that would run under Linux and also has CLEAR instructions
> (as I am new to Linux and find alot of the help and man pages to be
> useless to me) would be great as well, because in the end I would
> ideally like to focus only on software running under Linux. I use Suse
> for now, but am starting to realize that there is better versions to use
> for the purpose as many of the programs that I see online have not been
> yet ported to Suse, and I have no ideas about how to do that myself.
> Thanks in advance for any help that you folks can offer!!
>
>
>> From: Ben Dugan ####@####.####
>> Reply-To: ####@####.####
>> To: ####@####.####
>> Subject: [gnupic] p18f parallel port programmer for PIC18F4550
>> Date: Wed, 14 Dec 2005 14:12:10 -0500
>>
>>
>> Two of us here at Current Designs have written a program to do
>> in-circuit programming of PIC18F4550 chips via the parallel port.
>> We'd be happy to share it if anyone would find it useful; of course
>> its a use-at-you-own-risk offer!
>>
>> We've used it to successfully load the bootloader that comes with the
>> PICDEM FS USB board (MCHPUSB.hex) onto our own board, so that further
>> program development can proceed through the usb port.
>>
>> The whole program is in a single C file. I'd like to put it somewhere
>> where everyone can get at it easily, along with a pdf describing the
>> cable I use and a README.txt file.
>>
>> Ben
>>
>>
>>
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