problem with WinPIC & ICProg with PICEX1000 programmer

[Dr Mitch]

I can't seem to reprogram my pics. Some of my pics, I can program. But
others, I get Verify errors and program failed... I'm only using 16F88
and 16F688 pics, some of each don't verify. Did I maybe... write/read
protect the chip somehow? If so, How do I fix it?

Thanks!

 

[John Popelish]

Dr Mitch wrote:

I can't seem to reprogram my pics. Some of my pics, I can program. But
others, I get Verify errors and program failed... I'm only using 16F88
and 16F688 pics, some of each don't verify. Did I maybe... write/read
protect the chip somehow? If so, How do I fix it?

Thanks!

Are you, by any chance, using a PicStart Plus programmer?

--
Regards,

John Popelish

 

[John Popelish]

Dr Mitch wrote:

John Popelish <jpopel...@rica.net> wrote:
Dr Mitch wrote:
I can't seem to reprogram my pics. Some of my pics, I can program. But
others, I get Verify errors and program failed... I'm only using 16F88
and 16F688 pics, some of each don't verify. Did I maybe... write/read
protect the chip somehow? If so, How do I fix it?
Thanks!
Are you, by any chance, using a PicStart Plus programmer?

Negative. I'm using this guy:

http://www.sunrom.com/index.php?main_page=product_info&cPath=25_47&products_id=189

The SUNROM PICEX1000 - JDM

Sorry, I don't have experience with that. I found a design
weakness in the PicStart Plus that made its operation
unstable in a way that sounded like what you are describing.
It has a boost converter to create the program voltage,
for the PIC, that contaminated the 5 volt supply with
voltage spikes. In that case, replacing the storage caps
before and after the converter with low ESR types got the
spikes under control and all the symptoms cleared.

You might try paralleling some additional capacitance (even
just across the supply pins of the chip being programmed in
the ZIF socket) across your supply lines to see if the same
kind of thing is works for you.

--
Regards,

John Popelish

 

[Dr Mitch]

Negative. I'm using this guy:
http://www.sunrom.com/index.php?main_page=product_info&cPath=25_47&products_id=189

The SUNROM PICEX1000 - JDM

On Dec 15, 12:41 pm, John Popelish <jpopel...@rica.net> wrote:

Dr Mitch wrote:
I can't seem to reprogram my pics. Some of my pics, I can program. But
others, I get Verify errors and program failed... I'm only using 16F88
and 16F688 pics, some of each don't verify. Did I maybe... write/read
protect the chip somehow? If so, How do I fix it?

Thanks!

Are you, by any chance, using a PicStart Plus programmer?

--
Regards,

John Popelish

 

[Jon Slaughter]

"Dr Mitch" <doctormike@gmail.com> wrote in message
news:ce008fb2-7cdd-4352-8757-9eb6318f6435@w40g2000hsb.googlegroups.com...

I can't seem to reprogram my pics. Some of my pics, I can program. But
others, I get Verify errors and program failed... I'm only using 16F88
and 16F688 pics, some of each don't verify. Did I maybe... write/read
protect the chip somehow? If so, How do I fix it?

Make sure there are no errors. I know I've had similar issues and its
because winpic doesn't have the proper files for those pics. It will say
something about not having the proper initialization sequence or
something(actually I forgot). Its in the messages tab and it says it when
you try and start the write processes.

The point being even though it lets you select the pic sometimes it doesn't
have the ability to program it. Not sure why.