ICD 2 and 18F1220 problems

Started by tadaosystems April 19, 2004
Has anyone used the ICD 2 with a pic18f1220? I'm having trouble just
reliably programming the 1220s. Seems to be hit or miss (sometimes
it's fine, other times it gives me a verify failed error on the
program memory space).

I'm using win2k server, the usb connection, an external 9 volt power
supply for the ICD 2, and the universal programming module.

I've searched across the Microchip dev forums for an answer, but
haven't found anything. Various similar problems suggested not
letting the ICD pick the memory ranges, etc. Voltages seem to be at
adequate levels.

When it did program, I couldn't get the chip to do anything. It
seems to be a random operation. I don't know if this is my code or
if I'm just not getting a clean program onto it.

Migrating from 16Fs to 18Fs is proving to be a pain in the butt.



I have had nothing but superb results with the 18F chips. I
made the change over a year ago and I have used hundreds of
18F452s and 18F8720s with no problems whatsoever.
I'll never go back to the 16 series.

Most of the problems I have had using the ICD2 resulted from
not having a solid 5V supplied to the chip. Make certain that the
part has adequate bypass caps. I never use the programmer
to power the device being programmed. Charles Linquist

----- Original Message -----
From: "tadaosystems" <>
To: <>
Sent: Monday, April 19, 2004 4:49 PM
Subject: [piclist] ICD 2 and 18F1220 problems > Has anyone used the ICD 2 with a pic18f1220? I'm having trouble just
> reliably programming the 1220s. Seems to be hit or miss (sometimes
> it's fine, other times it gives me a verify failed error on the
> program memory space).
>
> I'm using win2k server, the usb connection, an external 9 volt power
> supply for the ICD 2, and the universal programming module.
>
> I've searched across the Microchip dev forums for an answer, but
> haven't found anything. Various similar problems suggested not
> letting the ICD pick the memory ranges, etc. Voltages seem to be at
> adequate levels.
>
> When it did program, I couldn't get the chip to do anything. It
> seems to be a random operation. I don't know if this is my code or
> if I'm just not getting a clean program onto it.
>
> Migrating from 16Fs to 18Fs is proving to be a pain in the butt. >
> to unsubscribe, go to http://www.yahoogroups.com and follow the
instructions
> Yahoo! Groups Links >



To use the UPM you have to set MCLR. At least if I have it disabled
in the config word it won't ever program it correctly.

Ah well...now on to actually making it run.

--- In , "Charles Linquist" <Charles@L...>
wrote:
> I have had nothing but superb results with the 18F chips. I
> made the change over a year ago and I have used hundreds of
> 18F452s and 18F8720s with no problems whatsoever.
> I'll never go back to the 16 series.
>
> Most of the problems I have had using the ICD2 resulted from
> not having a solid 5V supplied to the chip. Make certain that the
> part has adequate bypass caps. I never use the programmer
> to power the device being programmed. > Charles Linquist
>
> ----- Original Message -----
> From: "tadaosystems" <flipflops67@h...>
> To: <>
> Sent: Monday, April 19, 2004 4:49 PM
> Subject: [piclist] ICD 2 and 18F1220 problems > > Has anyone used the ICD 2 with a pic18f1220? I'm having trouble
just
> > reliably programming the 1220s. Seems to be hit or miss
(sometimes
> > it's fine, other times it gives me a verify failed error on the
> > program memory space).
> >
> > I'm using win2k server, the usb connection, an external 9 volt
power
> > supply for the ICD 2, and the universal programming module.
> >
> > I've searched across the Microchip dev forums for an answer, but
> > haven't found anything. Various similar problems suggested not
> > letting the ICD pick the memory ranges, etc. Voltages seem to be
at
> > adequate levels.
> >
> > When it did program, I couldn't get the chip to do anything. It
> > seems to be a random operation. I don't know if this is my code
or
> > if I'm just not getting a clean program onto it.
> >
> > Migrating from 16Fs to 18Fs is proving to be a pain in the butt.
> >
> >
> >
> > to unsubscribe, go to http://www.yahoogroups.com and follow the
> instructions
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >