3 Channel Logic Analyzer (PICkit2 / Junebug) like a HP LogicDart - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 12th April 2008, 01:22 AM

As pointed out by FunnyNYPD the new PICkit2 2.50 software now includes a 3 Channel Logic Analyzer. Reminds me of the now very collectible and very cool HP LogicDart.

The 3 channel Logic Tool, excellent

HPs 3 Channel Logic Dart

petrv · 12th April 2008, 06:00 AM

Hi Bill,

Nice ... I was thinking about using the Unicorn for a low-speed L.A. demo

but then of course it would be necessary to write the software (for the micro and PC).

Petr

Pommie · 12th April 2008, 01:58 PM

If you download this then you should also download version 8.02 of MPLAB. This is a good thing anyway as they appear to have fixed a lot of the debug problems with the PK2. Now, step over and run to cursor work.

I've not played with the analyzer yet. Hopefully tomorrow.

Mike.

blueroomelectronics · 12th April 2008, 02:15 PM

Just playing with the Anaylzer and the Junebug. Not fully tested but I'm hoping it would make a simple IR data capture / viewer.

Code:

;*** Junebug IR Bridge, uses PICkit2 Logic Analyzer mode Ch1
;*** DIP-4 (TX) & 6 (IR) should be on, Trigger Analyzer on Ch1 "/"
    list    p=18F1320        
    include    <p18f1320.inc>
    CONFIG    OSC=INTIO2,WDT=OFF,LVP=OFF
    org    0h
    movlw   72h
    movwf   OSCCON        ; 8MHz clock
    setf      ADCON1        ; set all I/O to digital
    bcf     INTCON2,RBPU    ; enable PORTB input pullups
    movlw    b'11111101'
    movwf    TRISB        ; RB0 in, RB1 out
loop       btfss    PORTB,0
    bsf    LATB,1    
    btfsc    PORTB,0
    bcf    LATB,1
    bra    loop        ; loop forever
    END

nickelflippr · 12th April 2008, 07:26 PM

Thanks for the update, that will definitely be useful. Microchip continues to build on the PicKit2, whats next?

A 3 channel software PWM.

blueroomelectronics · 12th April 2008, 09:23 PM

That lookslike servo PWM.

nickelflippr · 13th April 2008, 02:23 AM

Actually just an up and down loop for somes leds. The pulse time & period are too long for servos if you can see the bitty 10ms/div at the bottom. The analyzer seems pretty sensitive to pin loading? which in turn seems to effect the trigger. This caused the analyzer to lock up repeatedly.

blueroomelectronics · 13th April 2008, 02:27 AM

The 4.7K pulldowns on PGC & PGD might have something to do with it.

nickelflippr · 13th April 2008, 02:42 AM

Well I used channel 3 for the trigger. Also using the older style PicKit2 with the black button, so not sure even if these have the pulldowns. The fact that the load was a regular power hungry led "seems" to have been the issue. Tried external pulldowns for channels 1 & 2, but ended up disconnecting them and the leds for the posted screen shot.

LabRat · 13th April 2008, 03:00 AM

I just spent the last 2 hrs tweaking the IR demo code (via trial and error) to recognize one of my remotes. Then I log in and find the beautiful demo you set up for sampling the IR signal.

Fantastic!

blueroomelectronics · 13th April 2008, 03:09 AM

I've been playing with my silly remote collection for more of the day than I should. Such fun and thanks to Microchips marvelous little PICkit2 program.

The only one the IR doesn't see properly is my Rogers (Scientific Atlanta) cable box. I think it uses a 56KHz carrier.

Funny NYPD · 15th April 2008, 01:59 PM

Quote:

Originally Posted by blueroomelectronics

As pointed out by FunnyNYPD the new PICkit2 2.50 software now includes a 3 Channel Logic Analyzer. Reminds me of the now very collectible and very cool HP LogicDart.

The 3 channel Logic Tool, excellent

HPs 3 Channel Logic Dart

Microchip also confirmed that you can use multiple PICkit2 to get more channels for logic tool.

LabRat · 15th April 2008, 02:18 PM

Wouldn't it make more sense to just extend the PICKIT2 code into a larger PIC, and massage the "Logic Tool" code accordingly?

Funny NYPD · 15th April 2008, 03:14 PM

Good point, that require some work though.
Even the PICkit2 itself still has one more spare pin to hack for the logic tool.

blueroomelectronics · 15th April 2008, 03:15 PM

Quote:

Originally Posted by LabRat

Wouldn't it make more sense to just extend the PICKIT2 code into a larger PIC, and massage the "Logic Tool" code accordingly?

Perhaps someday they will, but it would mean a new PICkit2 design. Between the simulator, debugger & logic tool you've got quite an arsenal of tools for the budding PIC guru.

Microchips high end ICE have scads of features but $$$, the PICkit2 2.50 Logic Analyzer & Logic Tool are amazing for the price.

Quote:

Even the PICkit2 itself still has one more spare pin to hack for the logic tool.

It's a 4 channel out, 3 channel in logic tool, there are no more connections. The VPP is output only. Perhaps it would make an interesting adjustable voltage out.

12th April 2008, 01:22 AM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	3 Channel Logic Analyzer (PICkit2 / Junebug) like a HP LogicDart As pointed out by FunnyNYPD the new PICkit2 2.50 software now includes a 3 Channel Logic Analyzer. Reminds me of the now very collectible and very cool HP LogicDart. The 3 channel Logic Tool, excellent HPs 3 Channel Logic Dart __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

12th April 2008, 09:23 PM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	That lookslike servo PWM. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

13th April 2008, 02:27 AM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	The 4.7K pulldowns on PGC & PGD might have something to do with it. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

13th April 2008, 03:00 AM	(permalink)
LabRat Experienced Member	Brilliant timing Bill... I just spent the last 2 hrs tweaking the IR demo code (via trial and error) to recognize one of my remotes. Then I log in and find the beautiful demo you set up for sampling the IR signal. Fantastic!

13th April 2008, 03:09 AM	(permalink)
blueroomelectronics Experienced Member Blog Entries: 4	I've been playing with my silly remote collection for more of the day than I should. Such fun and thanks to Microchips marvelous little PICkit2 program. The only one the IR doesn't see properly is my Rogers (Scientific Atlanta) cable box. I think it uses a 56KHz carrier. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

12th April 2008, 06:00 AM	(permalink)
petrv Experienced Member	Hi Bill, Nice ... I was thinking about using the Unicorn for a low-speed L.A. demo but then of course it would be necessary to write the software (for the micro and PC). Petr

12th April 2008, 01:58 PM	(permalink)
Pommie Experienced Member	If you download this then you should also download version 8.02 of MPLAB. This is a good thing anyway as they appear to have fixed a lot of the debug problems with the PK2. Now, step over and run to cursor work. I've not played with the analyzer yet. Hopefully tomorrow. Mike.

12th April 2008, 07:26 PM	(permalink)
nickelflippr Experienced Member	Thanks for the update, that will definitely be useful. Microchip continues to build on the PicKit2, whats next? A 3 channel software PWM.

13th April 2008, 02:23 AM	(permalink)
nickelflippr Experienced Member	Actually just an up and down loop for somes leds. The pulse time & period are too long for servos if you can see the bitty 10ms/div at the bottom. The analyzer seems pretty sensitive to pin loading? which in turn seems to effect the trigger. This caused the analyzer to lock up repeatedly.

13th April 2008, 02:42 AM	(permalink)
nickelflippr Experienced Member	Well I used channel 3 for the trigger. Also using the older style PicKit2 with the black button, so not sure even if these have the pulldowns. The fact that the load was a regular power hungry led "seems" to have been the issue. Tried external pulldowns for channels 1 & 2, but ended up disconnecting them and the leds for the posted screen shot.

15th April 2008, 02:18 PM	(permalink)
LabRat Experienced Member	Wouldn't it make more sense to just extend the PICKIT2 code into a larger PIC, and massage the "Logic Tool" code accordingly?

15th April 2008, 03:14 PM	(permalink)
Funny NYPD Experienced Member	Good point, that require some work though. Even the PICkit2 itself still has one more spare pin to hack for the logic tool. __________________ Funny N., Au Group Electronics, USA, www.AuElectronics.com

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