I use the epic
www.melabs.com
regards
victor
----- Original Message -----
From: "Ubaid U Qureshi" <UQureshi@J-TECH.COM.PK>
To: <PICLIST@MITVMA.MIT.EDU>
Sent: Friday, May 24, 2002 7:07 AM
Subject: Re: [PIC]: El Cheapo Programmer problems


> Hello Mr. Mark J. Dulcey,
>
> Can you recomend any good and cheap production-grade programmer for a
> beginner?
>
> Freindly Regards,
>
>
> Ubaid U Qureshi
>
> Senior CAD Analyst,
>
>
>
>
>
>                     "Mark J.
>                     Dulcey"               To:     PICLIST@MITVMA.MIT.EDU
>                     <mark@BUTTERY.        cc:
>                     ORG>                  Subject:     Re: [PIC]: El
Cheapo Programmer
>                     Sent by: pic          problems
>                     microcontrolle
>                     r discussion
>                     list
>                     <PICLIST@MITVM
>                     A.MIT.EDU>
>
>
>                     05/24/2002
>                     01:58 PM
>                     Please respond
>                     to pic
>                     microcontrolle
>                     r discussion
>                     list
>
>
>
>
>
> Tal Dayan wrote:
> > Built today the El Cheapo programmer according to the latest software
> (yes,
> > the 2N7000 marking was wrong and I damaged one). It passed all the debug
> > mode tests but refuses the program (location 0x00 always return 0xfff or
> > something like that).
> >
> > My question are:
> >
> > 1. I am trying to program 16LF84A. The software has only 16F84A. Is it
ok
> ?
> >
> > 2. I am using a notebook computer (Sony Vaio f450). Is this a problem ?
> >
> > 3. I am using a long cable (10'). Is it a problem ?
> >
> > 4. The 12V regulator is 7812 instead of 78L12 so I had to increase the
> power
> > to about 19V to get the right VPP.
> >
> > 5. Is the El Cheapo any good and if not, what is a good and cheap
> > alternative ?
> >
> >
> > BTW, when the El Cheapo report a verify error, it keeps the programming
> > voltage on. Looks like
> > a bug to me.
> >
> > Any help will be greatly appreciated.
>
>
> The error you're seeing (location 0 returning 0xFFF) is caused by a
> change in recent versions of MPLAB. The default output format is now
> 32-bit hex format (INHX32) instead of 8-bit hex (INHX8M); the El Cheapo
> software only understands the latter.
>
> To fix the problem, you need to change your project settings in MPLAB.
> Go to the Project menu, and choose Edit Project. Down near the bottom of
> that window, there is a list of project files; the first one should be
> for the .hex file. Click on that, and then click on the Node Properties
> button. Click on INHX8M in the windows that appears, and then say OK to
> everything. Rebuild your project, and you should be ready to go.
>
> By the way, changing the regulator to a 7812 isn't really a good idea;
> as Myke explains on the El Cheapo web site, the current limit in the
> design was intentional, and allows for safe "hot-plugging" of the PIC.
> You might want to get your hands on a 78L12 somewhere.
>
> Using a 16LF84A instead of a 16F84A isn't a problem. The "LF" means that
> your part is rated for low-voltage operation. Remember, though, that the
> El Cheapo is a "development" rather than "production" programmer - the
> latter is required to test parts over their full voltage range. If you
> actually want to design circuits that operate your 16LF84A at 2 volts,
> you may want to get your hands on a production-grade programmer.
>
> --
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>

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