Re Can't get my ludipipo-style PIC programmer to work with by clx19837

VIEWS: 97 PAGES: 3

									        Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix

Re: Can't get my ludipipo−style PIC programmer to
work with anything else than Pix

Source: http://coding.derkeiler.com/Archive/General/comp.arch.embedded/2005−12/msg00117.html



     • From: Troels Bang Jensen <marvin@xxxxxxxx>
     • Date: Sat, 03 Dec 2005 02:50:31 +0100

Byron A Jeff wrote:

       In article <dmq473$249n$1@xxxxxxxxxxxx>,
       Troels Bang Jensen <marvin@xxxxxxxx> wrote:




              I recently dusted off my old Pic test board (a
              Brinck br873) which, as far as I can tell from the
              schematics, is a ludipipo style programmer.




       OK




              I used to program it using IC−prog and choosing the
              JDM programmer setting. However, after having tried
              several programs(ponyprog, prog84, two flavours of
              winpic, ntpicprog, pip02, icprog ver. 1.05, 1.05D
              and 1.04) in both windows xp, linux and win98, the
              only thing that's worked for me is the old Pix
              program in a dosbox in '98.




       Were all of these on the same machine? ludipipo is a serial
       programmer and utilizes the voltages of the RS232 port to
       accmplish programming.
       Many modern serial ports no longer produce the voltages to

Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix             1
       Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix
       drive the
       programming process properly.



I figured that as well − the linux and winxp stuff was done on my athlon
xp workstation. I actually had to find a serial port in my electronic
junk heap because it was only implemented as a connector on the
motherboard....

However, I used my old 133MHz laptop for the win98/dos part − and I'm
still curious as to how it can be that I can't use icprog on that
computer since Pix works fine − that suggests to me that the electrical
part is good. Oh well....




              The other programmers try to program the chip (the
              LEDs on the board do their thing), but the
              programming fails, and the programmers can't read
              the chip.




       Which chip?




For all my test cases I used a 16F84A. Pix actually only does 16C84, but
the match seems to be close enough that it doesn't matter...




              This poses a problem because I'd like to use a
              16C717 for my current project instead of the 16F84A
              that I've tested with − and Pix simply doesn't know
              that chip.




       So you tested with the 16F84A. That's probably a voltage problem.




Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix          2
         Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix


Yeah, I'm somewhat convinced that my programmer operates with
questionable voltage levels...that may just be me.



         You want to program a 16C717 OTP. Simply put, it won't work.
         If you check out the programming specifications for the 16C717
         you will find
         that it requires 50 ma of current for Vpp. No serial port in
         the universe
         is going to put out that much current. At the very minimum
         you'll need
         an external Vpp circuit to supply the proper voltage/current.



Argh, I had assumed the 16C717 was EEPROM based − Oh well, I suppose I'd
better switch to the 16F88 then − in principle I suppose that would
enable me to use my old programmer.



         You'll need to take care in scouting out a programmer. Most
         PIC programmers
         nowadays are designed to program flash parts, which have a
         minimal voltage
         and current rating for Vpp. EPROM based parts, such as the
         16C717 need proper voltage and current (13V @ 50ma) in order
         to program the EPROM cells.




Thanks for the heads−up. Although I've known about the PIC MCUs for
years, I never realized that the main difference between the C and the F
units was that F is EEPROM. Simply amazing. I think I'll stay away from
OTP parts since I mostly use PICs for tinkering.


Anyway, I've decided that I'd be better off with a DIY USB programmer
(I'm thinking the K150) − then I'd be able to program from my powerbook
which has no serial port :)=

(oh, and I was about to post an ASCII schematic of my old programmer,
made in my Favorite Editor(tm)(because pyascii behaved a little weird
when I tried it), but I thought I'd spare you the gory details ;))


Troels
.


Re: Can't get my ludipipo−style PIC programmer to work with anything else than Pix            3

								
To top