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PICList Thread
'Programming Pics'
1997\03\12@141621 by techccs

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face
Hello,

  I am a beginner in programming pics.  I do have an electronics
background.  I was going to build Octavio's ProPic programmer, and put
it off.  I have now decided to build it.


  I want to start off slow and inexpensive, being a student.  What I
want to know, is where can I get the software to create a hex file in
order to program the pic16c84?


Brian

1997\03\12@195155 by joha1359

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At 01:04 PM 3/12/97 -0600, you wrote:
>Hello,
>
>   I am a beginner in programming pics.  I do have an electronics
>background.  I was going to build Octavio's ProPic programmer, and put
>it off.  I have now decided to build it.
>
>
>   I want to start off slow and inexpensive, being a student.  What I
>want to know, is where can I get the software to create a hex file in
>order to program the pic16c84?
>
>
>Brian
>
Hi!
Try this site:
       http://hobbes.king.ac.uk/matt/pic/
There is a very cheap and good programmer to the c84. Hardware and software.
I have used it many times and it works.
                                                       Johan
                                                       spam_OUTjoha1359TakeThisOuTspamhem1.passag
en.se


'Programming PICs'
1999\09\22@034257 by Niklas CarlŽn
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Hi

One quick question:
Is it OK to leave osc pins floating when programming?
Someone told me not to but he can«t remember where he got that advice (or if it really applied to PICs) and I can«t find anything about this in the datasheets or programming specs.

/Niklas CarlŽn

1999\09\23@013917 by w. v. ooijen / f. hanneman

picon face
The Vpp must be above the level (14 v or so) within
a certain number of clock pulses.
When your programming circuit has a slow ( = bad) Vpp raise it
helps to keep the xtal pins open (the worst it can do is pick up
50/60 Hz) as compare to leaveing the xtal connected.
Wouter.

----------
> From: Niklas CarlŽn <.....niklas.krakauKILLspamspam@spam@SWIPNET.SE>
> To: PICLISTspamKILLspamMITVMA.MIT.EDU
> Subject: Programming PICs
> Date: Wednesday, September 22, 1999 09:44
>
> Hi
>
> One quick question:
> Is it OK to leave osc pins floating when programming?
> Someone told me not to but he can«t remember where he got that advice (or
if it really applied to PICs) and I can«t find anything about this in the
datasheets or programming specs.
>
> /Niklas CarlŽn

1999\09\23@210732 by J Nagy

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Niklas CarlŽn wrote:
>
>One quick question:
>Is it OK to leave osc pins floating when programming?
>Someone told me not to but he can«t remember where he got that advice (or
>if it really applied to PICs) and I can«t find anything about this in the
>datasheets or programming specs.
>

Niklas:
       People got involved with unused I/O pins, and I didn't see any
response to your question... My attitude on this is that PICs are CMOS
devices, and should *never* have any pins left floating when power is
applied.
       I have used pullup resistors on all unused pins in my programmers.
Offhand, I'm not sure why I chose pullups over pulldowns, but it was likely
so that there wouldn't be any conflicts if there were internal pullups that
were active. (Internal pullups with external pulldowns could result in just
as bad a situation as floating inputs!)



       Jim Nagy
       Elm Electronics
 ICs for Experimenters
http://www.elmelectronics.com/

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