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PICList Thread
'Verify Problem on 16C84/Cheap RS-232 Prog.'
1995\08\12@144331 by Antti Lukats

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>Hi, I've built the Cheap RS-232 16C84 Programmer and I'm having some problems
>using verify of PIP-02.
>I can program and erase the device OK but cant read or verify.
>(I'm using a small and simple program to test it).
>Please help !. What is wrong ?
>Thanks in advance.

1. please use DRVTST1.EXE to verify that your programmer
hardware works ok. DRVTST1 is very simple and stupid program,
but you can use it to set or test all the the programmer pins.
>From drvtst1 prompt:
Set data pin to high level ->DATA 1<enter>
read back data pin ->DATA<enter>
should get 1 high level
Set data pin to low level ->DATA 0<enter>
read back data pin ->DATA<enter>
should get 0 low level
if the above sequence works then PIP readback should also work.
if the above fails please check the PICLIST mailings about
comments on data readback hardware issues.
if the problems still exist, let us know.

antti

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-- Antti Lukats                          Silicon Studio --
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-- ftp://rasi.lr.ttu.ee/pub/sis          Tallinn EE0001 --
-- http://rasi.lr.ttu.ee/~sis            Estonia        --
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1995\08\13@103117 by Antti Lukats

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>Somehow I missed the original posting re the Cheap RS-232 program.
>Is that code still available somewhere on the net?
>
Well DOS program + driver for RS-232 programmer are at our site,
goto our WWW and follow links to get the files
PIP-02.ZIP programmer and COM84.ZIP driver for the RS-232 programmer

Source code not available to public from our site at this moment.

**** SORRY: our ftp server is currently down, try on monday!

antti

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-- Antti Lukats                          Silicon Studio --
-- .....sisKILLspamspam@spam@rasi.lr.ttu.ee                    PO Box 3500    --
-- ftp://rasi.lr.ttu.ee/pub/sis          Tallinn EE0001 --
-- http://rasi.lr.ttu.ee/~sis            Estonia        --
----------------------------------------------------------

1995\08\14@062259 by Lotty

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Mike wrote:

>> Hi, I've built the Cheap RS-232 16C84 Programmer and I'm having some problems
>> using verify of PIP-02.
>> I can program and erase the device OK but cant read or verify.
>> (I'm using a small and simple program to test it).
>> Please help !. What is wrong ?
>> Thanks in advance.

I had problems with it, too.
Direcly connected to the PC it worked fine, but with 1m cable it didn't.

I fixed it by placing a 100nF cap. parallel to the 2K2 resistor (between
CTS and DTR).

It works fine now!

  Lothar

1995\08\14@065238 by Erik Hermann

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>I can program and erase the device OK but cant read or verify.

Try to vary the 2k2 resistor between DTR and CTS.


 - Erik

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