Can't connect to the PK2-LITE

avi · Oct 1, 2008

Hi all,
I've built the PK2 LITE circuit and I've installed the picKIT2 application from Microchip web site.
But, the application cann't identfy the Circuit,
even when I plug-in the USB cable to the PC, the Win. doesn't recognize nothing, no sound or window is opened.
where can I find an istructions how to use the PK2?

Another question, the +5v in the circuit is comes from the USB or should I connect an external voltage source?

TNX, your assistance will be appreciated.
Avi.

3v0 · Oct 1, 2008

Did you program the 18F2550 ?

avi said:
Hi all,
I've built the PK2 LITE circuit and I've installed the picKIT2 application from Microchip web site.
But, the application cann't identfy the Circuit,
even when I plug-in the USB cable to the PC, the Win. doesn't recognize nothing, no sound or window is opened.
where can I find an istructions how to use the PK2?

Another question, the +5v in the circuit is comes from the USB or should I connect an external voltage source?

TNX, your assistance will be appreciated.
Avi.

avi · Oct 6, 2008

Yes, i've programmed the PIC2550 using ART2003

But, it still doesn't work..
my PC even doesn't recognize nothing when I plug in the USB cable to the PC

blueroomelectronics · Oct 6, 2008

All the USB needs to see a PK2 is a programmed 18f2550 a 20MHz crystal and caps , plus the USB connector and .47uF vreg cap. There are some versions of the schematc with the D+ & D- pins on the USB connector reversed.

avi · Oct 10, 2008

It still doesn't work

It's driving me crazy ...
I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

blueroomelectronics · Oct 10, 2008

avi said:
It's driving me crazy ...
I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

What is a 18F4552? The Lite schematic uses a 18F2550

mvs sarma · Oct 10, 2008

@Bill of Blueroomelectronics,
Sir, what is this PK2 LITE?Is it part of Junebug less tutor?

mvs sarma · Oct 10, 2008

avi said:
It's driving me crazy ...
I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

Many times I saw cases whether D- and D+ wires of USB get interchanged? Even published articles from Elektor have issued corrections Later.

please check carefully. the USB B socket pin counting confuses, seeing from bottom or top. In USB A it can be clearly located pin adjacent to Ground is D+

blueroomelectronics · Oct 10, 2008

mvs sarma said:
@Bill of Blueroomelectronics,
Sir, what is this PK2 LITE?Is it part of Junebug less tutor?

Pretty much it's the prototype PICkit2 built to the bare minimum without tutor. The D+ & D- lines were switched but the Junebug manual versions are correct.

mvs sarma · Oct 10, 2008

blueroomelectronics said:
Pretty much it's the prototype PICkit2 built to the bare minimum without tutor. The D+ & D- lines were switched but the Junebug manual versions are correct.

Thanks Bill

avi · Oct 10, 2008

Sorry, I mean PIC18F2550...

-------------

avi said:
It's driving me crazy ...
I've reproggramed the PIC18F4552, and I've checked the circuit again..everything is OK..
Windows doesn't detect nothing when I plug-in the usb.

When I press SW1 (RB5 pull down) and plug-in the usb, then the Windows detects some un-recognized usb connection, and the "busy" LED blinks for a few sec.

I really don't know what to do...pls hlp.

TIA,
Avi.

Mickster · Oct 10, 2008

Have you checked the D+ and D- lines, as Sarma suggested?

One less problem to rule out.

blueroomelectronics · Oct 10, 2008

It doesn't require any special drivers; it'll appear as a simple HID device like a mouse. Run the PICKit2 standalone software to see if it sees it.
You must have the .47uf cap and it must be a 20MHz crystal. The flashing red led should only flash if you hold down the button before plugging in the USB.
How did you initially program the 18f2550?

Mickster · Oct 10, 2008

blueroomelectronics said:
How did you initially program the 18f2550?

His 2nd post in this thread, 3rd post from the top, says he programmed the '2550 with "ART2003".

blueroomelectronics · Oct 10, 2008

That's what I get for doing this on an iPhone. I'll have to see what an ART2003 is.

Mickster · Oct 10, 2008

Fox Delta No Power Parallel Port Programmer:

**broken link removed**

blueroomelectronics · Oct 10, 2008

It's a LVP only programmer. 3VO an I had a discussion on if this would work. My opinion was no as it would always appear the button was pressed.

mvs sarma · Oct 10, 2008

avi said:
-------------

Try to put a schematic of your programmer and even a photo of the unit you assembled(not what the site has shown)here . It would help faster discussion.

Mickster · Oct 10, 2008

blueroomelectronics said:
It's a LVP only programmer. 3VO an I had a discussion on if this would work. My opinion was no as it would always appear the button was pressed.

That was here wasn't it? :

https://www.electro-tech-online.com/threads/how-to-build-a-usb-pic-programmer.42654/

blueroomelectronics · Oct 10, 2008

That's the thread.

Can't connect to the PK2-LITE

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