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PICList Thread
'[PIC]: sanity check'
2001\08\21@205850 by mikemo

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I'm just looking for a sanity check before I proceed. I'm new to the PIC
world and want to develop a project that uses one of the newer Flash
parts (16f870). I want to build as much of the development system as I
can. Here is what I'm planning.

Build the "Flash-PIC Programmer" from Martin Clausen's web page
http://www.rotgradpsi.de/mc/picproge.html
Once built, I should be able to program 16f87x parts using his DOS
program and my parallel port.

Then, I'd like to build the ICD from the "build your own PIC development
tool" web site (sorry, don't have the name handy, but I know it was from
France). I will then program the 16f876 for the ICD using the previously
built programmer, along with the code that comes with the Microchip
MPLAB version 5.4 downloaded from the Microchip web site. I want to be
able to use the home-brew ICD with the MPLAB software from Microchip to
debug my code.

So when I'm done I should have a flexible programer, along with an in
circuit debugger.
Did I miss anything?
Thanks and regards,
Mike M.
Palm Harbor, FL

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2001\08\22@110855 by Byron A Jeff

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On Tue, Aug 21, 2001 at 08:54:41PM -0400, Mike Maiorana wrote:
> I'm just looking for a sanity check before I proceed. I'm new to the PIC
> world and want to develop a project that uses one of the newer Flash
> parts (16f870). I want to build as much of the development system as I
> can. Here is what I'm planning.
>
> Build the "Flash-PIC Programmer" from Martin Clausen's web page
> http://www.rotgradpsi.de/mc/picproge.html

Let me point you in another direction. Since your intent is to move to the
ICD (or some other bootloader type system) you really, REALLY, want to simplify
the initial programmer.

Take a look at my trivial programmer:

http://www.finitesite.com/d3jsys

I just updated the site yesterday. It requires at max 1 HCT TTL chip and 1
resistor. Throw it on a breadboard in about a 1/2 hour. It's been tested
with low voltage programming with the 16F877 (which means that it'll work
with the 16F870) and the 16F628 (just got a report this morning).

I'm still looking for DOS/Windows developers to test the hardware (which
looks like a Tait Style programmer) with some piece of DOS/Windows software.
I took a brief look at pp87 which can be found here:

http://www.piclist.com/techref/microchip/davidtait/bestpp84.zip

But I haven't tested it. Since it's a 16F87X programmer that uses Tait style
hardware and has configurable parallel port pins, it should work.

> Once built, I should be able to program 16f87x parts using his DOS
> program and my parallel port.

Correct. But you'll save a lot of time if you build a simpler programmer.
Limited I admit. But you'll get going a lot faster and in both cost and
performance the 16F87X family along with the 16F628 (which is cheaper than
the 16F870, has more ram, but is missing the A/D module and port C) they
can keep up.

>
> Then, I'd like to build the ICD from the "build your own PIC development
> tool" web site (sorry, don't have the name handy, but I know it was from
> France). I will then program the 16f876 for the ICD using the previously
> built programmer, along with the code that comes with the Microchip
> MPLAB version 5.4 downloaded from the Microchip web site. I want to be
> able to use the home-brew ICD with the MPLAB software from Microchip to
> debug my code.

The 16F876 is programmable from the Trivial programmer.

>
> So when I'm done I should have a flexible programer, along with an in
> circuit debugger.
> Did I miss anything?

Nope. Just hoping that pointing you to a simpler programmer will get you going
faster. Less than $20 from the Radio Shack even if you buy a breadboard to
wire it up on.

BAJ

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