gnupic: Thread: Programming 16F877 for a newbie

Hey all.  Got a question I'm hoping to get a pointer on.

I'm very new to PIC's, and this semester I've got a class that'll be using
them.  From what the prof was saying we'll be using the F877 in the lab. 
I'm thinking of buying a couple to diddle with here at home.  The question
is what'll be the easiest route for me to program these beasts once I get
'em?

I saw that gpasm supports 'em, and gpsim shows at least partial support. 
But that's not the part that's got me wondering.  What I'm unsure of is how
do I get the program into the chip itself?

I found the link to picprg2.2 - that looks like the best bet for programing
software I've come across so far.  I also found the patch for the 2.2
kernel.  I'm running 2.4.0 - will the patched version still work for me?

In the same message, there are directions on doing LVP with an F877 after
another patch to picprg.  So if I'm understanding things correctly as long
as picprg will still work with the 2.4 kernel I should be good to go with
basically the following:
 - a 16F877 chip
 - gpasm
 - picprg2.2 patched with 1) the 2.2 parallel code and 2) the programming
   code (0x18) for the F877
 - a parallel cable with a 1k resistor between RB7 and pin 2 of the cable
 - switched 5V to Vdd on the F877

Does that all sound about right?

I certainly appreciate all the work that's gone into all these tools. 
Hopefully in the near future I'll be able to give something back.
-- 
Mike Werner  KA8YSD   | He that is slow to believe anything and
                      | everything is of great understanding,
'91 GS500E            | for belief in one false principle is the
Morgantown WV         | beginning of all unwisdom.

On Tuesday 09 January 2001 09:34 pm, Mike wrote:

> > Hey all.  Got a question I'm hoping to get a pointer on.
>
> I'm very new to PIC's, and this semester I've got a class that'll be using
> them.  From what the prof was saying we'll be using the F877 in the lab.
> I'm thinking of buying a couple to diddle with here at home.  The question
> is what'll be the easiest route for me to program these beasts once I get
> 'em?
>
> I saw that gpasm supports 'em, and gpsim shows at least partial support.
> But that's not the part that's got me wondering.  What I'm unsure of is how
> do I get the program into the chip itself?

I've been using the El Cheapo type programmer (DOS software only last I 
checked, so I kept a good 486 around to prevent me having to taint my machine 
and leave FreeBSD:)).  The Myke book even includes a PCB for it (which I 
horribly messed up, so I redid it in vectorboard).  Its a very good book, and 
your class may even use it.

The El Cheapo runs on a parellel port but uses the ICSP programming 
functions. It is pretty robust, and for its added complexity compared to 
other serial types, it works well.  Info can be found here: 
http://www.myke.com/picmicro.htm

>
> I found the link to picprg2.2 - that looks like the best bet for programing
> software I've come across so far.  I also found the patch for the 2.2
> kernel.  I'm running 2.4.0 - will the patched version still work for me?
>
> In the same message, there are directions on doing LVP with an F877 after
> another patch to picprg.  So if I'm understanding things correctly as long
> as picprg will still work with the 2.4 kernel I should be good to go with
> basically the following:
>  - a 16F877 chip
>  - gpasm
>  - picprg2.2 patched with 1) the 2.2 parallel code and 2) the programming
>    code (0x18) for the F877
>  - a parallel cable with a 1k resistor between RB7 and pin 2 of the cable
>  - switched 5V to Vdd on the F877
>
> Does that all sound about right?
>
> I certainly appreciate all the work that's gone into all these tools.
> Hopefully in the near future I'll be able to give something back.

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Mike,

You might consider an In Circuit Debugger, which is a bit more, but it saves
a lot of frustration.  It provides the abiltiy to set one breakpoint and
also watch
all variables.  Once done with the debugging, you can program the PIC for
actual standalone operation.

I have repackaged the Microchip ICD to permit you to interface with the
target PIC right on your breadboard.  See http://www.phanderson.com/icd/

Peter H. Anderson, http://www.phanderson.com, ####@####.####

----- Original Message -----
From: "Mike" ####@####.####
To: "GNUPic list" ####@####.####
Sent: Wednesday, January 10, 2001 12:34 AM
Subject: Programming 16F877 for a newbie

Mike writes:
> --VrqPEDrXMn8OVzN4
> Content-Type: text/plain; charset=us-ascii
> Content-Disposition: inline
> Content-Transfer-Encoding: quoted-printable
> 
> Hey all.  Got a question I'm hoping to get a pointer on.
> 
> I'm very new to PIC's, and this semester I've got a class that'll be using
> them.  From what the prof was saying we'll be using the F877 in the lab.=20
> I'm thinking of buying a couple to diddle with here at home.  The question
> is what'll be the easiest route for me to program these beasts once I get
> 'em?

Odds are the class will feature the Microchip ICD, as the F877 is the 
standard chip with the ICD. The quickest and easiest way to get started 
would be to buy an ICD for $159. Or the slightly less expensive 
rebundled ICD at http://www.phanderson.com/icd/.

I don't completely accept the arguments at 
http://www.phanderson.com/icd/ against Microchip's demo board and chip 
carrier. The chip carrier makes it possible to retrofit the ICD on to 
the PIC board of your choice. Having seen what is involved to support 
the ICD, I now lay out my own with ICD support. Also my ICD demo board 
had a socket for the AMP RJ-11 6 pin connector and could be used 
without the bulk of of the chip carrier.

I do have a bone to pick as to Microchip's terrible schematics. I hate 
that typical PC dot-matrix-printer look of schematic. At the very least 
they should ditch the page boarder and blow up the important stuff 
enough that it is readable.

http://www.mccad.com/ has an ecad package which prints much more 
attractive schematics. They come from a Macintosh background where 
apparently printing correctly and non-ugly is more important than in 
the PC world. The free version is a bit too limited at only one sheet 
of 8.5x11. Their schematics look best printed at 50%, and that leaves 
it big enough to view nicely on the monitor.


--
David Kelly N4HHE, ####@####.####
=====================================================================
The human mind ordinarily operates at only ten percent of its
capacity -- the rest is overhead for the operating system.

hi, 
I need to know  the programming time for one PIC 16F877
BRG,
krystian.

On Fri, 19 Sep 2003 09:14:34 +0200
Kociela Krystian ####@####.#### wrote:

> hi, 
> I need to know  the programming time for one PIC 16F877
> BRG,
> krystian.

http://web.interware.hu/leva/PIC/index.html

Have fun with it!


Leva

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On Fri, 19 Sep 2003 10:42:39 +0200
Kociela Krystian ####@####.#### wrote:

> there's no answer 4 my question. but tnx.

Oh yess you are right! I'm tired a little bit, and I thought You just wanted
to programm the PIC...

Sorry for the missunderstanding...

Leva

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