PicKit minus - Free is not always bug free

[rob...@hotmail.com]

Hello all,

This is for your information. I am looking at a problem I have with my PIC16F18857. It goes haywire when the code size becomes large (> 16 Kbyte).

I did not yet find the root cause but I ran into another issue with the PicKit minus software.

Although I am normally able to program the PIC16F18857 with this software it gives the following error when programming this large program (see attachment). It seems that the program is programmed correctly but still you do not want this type of error.

The problem does not occur when using MPLABX IPE.

So maybe better go for Evans PICKit Plus Software, not free but I assume bug free  ...

Kind regards,

Rob

[vsurducan]

Rob, what is "bug free" ?  I have never heard about such a thing...

:)

Assuming your pickit3 software and companion definition file is compatible with PIC16F8857, your problem might be from an incorrect connection to ICSP or heavily loaded iclk and dat lines. One option is to "filter" those lines with 200ohm-680ohm resistors in series between the pic and your load, while your programmer stays connected directly to the PIC ICSP lines using as short as possible cable ( aka 20-30cm).  The other issue I saw is the USB cable length and quality.

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[evan....@googlemail.com]

Send me the hex.  I will ensure it works.  I am sure it does, but, even if it does not.. it will because we will ensure it does. :-)

Evan

[Evan Venn]

I have just created a test program that fills that chip. No issues.

However, until I get the hex I cannot assure you.

There may be issues in the format of the hex thru to physical issues.  We have very robust test beds that rule out physical issues, so, can focus on the software.

Your call to send to me for assurance. 

Evan

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From: jal...@googlegroups.com <jal...@googlegroups.com> on behalf of vsurducan <vsur...@gmail.com>
Sent: Sunday, October 23, 2022 11:50:44 AM
To: jal...@googlegroups.com <jal...@googlegroups.com>
Subject: Re: [jallib] PicKit minus - Free is not always bug free

 

To view this discussion on the web visit https://groups.google.com/d/msgid/jallib/CAM%2Bj4qu8fndi2YQWVNuDPtb84Lb0vU8DcOVPVME0ni_qy%2BMyJg%40mail.gmail.com.

[Rob CJ]

Hi Vasile,

I know software is not bug free. I had no other connections to the programmer pins. It could be a bad connection (although IPE from MPLABX had no problem.

I will try again later to see if the problem persists. Sometimes it helps to just restart the programmer software.

Kind regards,

Rob

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Van: 'Evan Venn' via jallib <jal...@googlegroups.com>
Verzonden: zondag 23 oktober 2022 15:31
Aan: jal...@googlegroups.com <jal...@googlegroups.com>
Onderwerp: Re: [jallib] PicKit minus - Free is not always bug free

 

To view this discussion on the web visit https://groups.google.com/d/msgid/jallib/CWXP265MB25182CE15D1E50E66689ED99F92F9%40CWXP265MB2518.GBRP265.PROD.OUTLOOK.COM.

[vsurducan]

Rob, I know you know, :) be sure.

The error from your picture appears to me each time there is a connector problem ( for example Vpp has a contact issue which appears and disappears intermittently) or the PIC life has ended ( it's not able to retain address 0 content) or the supply voltage is below the specifications for programming. 

That is what I can think about.

I suggest checking Evans software/firmware pair for newer pics ( if you didn't yet), it is worth it for sure.

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