peteHVAC wrote:
>  Hello all, I found the problem!!!!!! When I push the rj12 connector into
> the ICD2 and hold it all is ok. When there is no pressure against the jack
> nothing works! It seems the MCLR line wasn't making contact which caused it
> to read 5v. I assumed any voltage is good voltage and thought it was ok.
> The contact pins in the female jack in the ICD aren't sprung
> out very far compared with other connectors I have. Oh well, it's always
> something simple isn't it. Thanks alot for all the help.
>
> Thanks, Pete
>   

As Roseane Rosanna Dana used it say, "Its always sum'thin!"

--Bob
>
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of peteHVAC
> Sent: Wednesday, August 09, 2006 7:36 PM
> To: Microcontroller discussion list - Public.
> Subject: [PIC] ICD2 pinout help
>
>
> Hello, I'm back at it. I tried the capacitor and all Vss Vdd pins are hooked
> up.
>
> ------Here is what I have now---------
>
> Mplab 7.41 on XP pro machine no other USB stuff plugged in.
> select 18f452 under configure/select device then select programmer = ICD2
> 18F452 on breadboard nothing else.
> PGD and PGC wires are not close together
> ICD2 wires connected to PIC and powering it. It did work correctly once
> 10k resistor from MCLR to VDD
> 10k resistor from PGM to VSS
> .01uf ceramic cap between VSS and VDD
>
> ------What I read-------------------
>
> 4.61v at VDD and MCLR using DMM
> data at PGD and PGC using scope
> VDD increases 1v when scope ground is connected
>
> ------What I've done----------------
>
> removed all traces of Mplab including ICD2 stuff according to their
> preinstaller/updater program
> reinstalled and retried. The preinstaller/updater utility indicates all ok.
> tried swapping PGD PGC wires
> moved everything to Windows 200 machine, all fresh, correctly installed ICD
> drivers.
> this is where it programmed and found the chip correctly before it shat the
> bed again.
>
> And what do I get for all of this..... ICDWarn0020: Invalid target device id
> (expected=0x21, read=0x0)
>
> Thank you very much for all the help but I think I'll dump this in
> Microchips lap.
> I really think it's something I'm doing or not doing but I can't see it.
>
> What stinks is that my new pc doesn't have a serial port and the serial to
> USB
> converters I've tried didn't work. So my trusty Picstart plus just sits
> there.
>
> Thanks, Pete
>
>
>
> -----Original Message-----
> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
> Of Bob Axtell
> Sent: Wednesday, August 09, 2006 4:39 PM
> To: Microcontroller discussion list - Public.
> Subject: Re: [PIC] ICD2 pinout help
>
>
> Nicola Perotto wrote:
>   
>> And there is a capacitor (100 nF) between vdd and vss pins???
>>        Nic
>>
>>     
> I always do so, yes. You might be able to drop it to 10-20nF.
>
> --Bob
>
>   
>> WH Tan wrote:
>>
>>     
>>> Hello Pete,
>>>
>>> Just to confirm one thing... PIC18F452 has 2 Vdd and 2 Vss pins.  Have
>>>       
> you
>   
>>> connected up each pair?
>>>
>>> Best regards,
>>>
>>> WH Tan
>>>
>>>
>>>
>>>
>>>
>>>       
>>>> -----Original Message-----
>>>> From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
>>>> Of peteHVAC
>>>> Sent: 09 August 2006 09:59
>>>> To: Microcontroller discussion list - Public.
>>>> Subject: [PIC] ICD2 pinout help
>>>>
>>>>
>>>> Hello, After setting everything up on another computer running
>>>> Windows 2000
>>>> I managed to program a chip read it back and all was well. No errors
>>>>         
> found
>   
>>>> the
>>>> 18f452 and reported all about it. Now for the part that's killing
>>>> me. After
>>>> this bit of success it's back to not finding the chips GRRRRRRRR.
>>>>
>>>> Could I be having some kind of funky ground problem?
>>>> PC, ICD, brick supply, breadboard should all have a common ground?
>>>> Should I call this ICD dead?
>>>>
>>>> I'm going to bed now. My head hurts :(
>>>> Thanks, Pete
>>>>
>>>> PS. I installed Mplab 4.1.
>>>>
>>>>
>>>>         
>>>       
>
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