SNAP

[Ptr]

Hi

 

I used wisp648 and now I upgraded to SNAP.

I downloaded IPE 5.35. I noticed that I had to look by the  Pickit4. For the connection with the PIC I need for pin 1 a resistor 50k between + and – and pin 6 has no connection.

When I make a connection a green led on the SNAP gets burning. Bit when I try to connect I get a failure-message.

So nothing is recognized.

 

Then I borrowed a Pickit3 and installed the Pickit 3 programmer and all works fine.

When I try to use the Picket3 in IPE 5.35 the Picket3 is recognised but ‘Connect’ also gives a failure-message.

 

I think there is something I don’t see! But what?

 

Here is still a screenshot:

 

 

Hope somebody can help me.

Greetings Peter

 

Genieten bestaat dankzij off-dagen!

 

[Rob Hamerling]

On 2020/03/22 16:36, Ptr wrote:

I used wisp648 and now I upgraded to SNAP.

I downloaded IPE 5.35. I noticed that I had to look by the  Pickit4. For the connection with the PIC I need for pin 1 a resistor 50k between + and – and pin 6 has no connection.

I think you mis-interpreted a picture. Pin1 connects to MCLR on the target board, and MCLR must be pulled high as usual. I think the (10-50K) resistor will probably be present on your target board and then no extra resistor is needed. I 'migrated' from Pickit3 to Snap without problems and without changing anything on any target board.

Regards, Rob.

--
Rob Hamerling, Vianen, NL

[Rob CJ]

Hi Peter,

I did a test. I have both a Pickit3 and SNAP connected so from IPE you can select one of the two. I could reproduce your problem with V5.35 but do not understand why it does not want to select the PIC18F4455 for the SNAP. Maybe they do not yet have included all PICs.

Screenshot of selection of programmer:

Screenshot when selecting PicKit3:

Screenshot when slecting SNAP:

I tried the same on an older version of IPE V5.20 but got the same problem.

I must say I did not expect this since the PIC18F4455 supports low voltage programming. I have tested the SNAP for the 16F1823 and I see the following for IPE V5.20

But when using version V5.35 you see this:

So it seems that they have some catching up to do and I hope that it will be solved in the future. If not you could post an issue for Microchip.

BTW. I did a test on a PIC16F1823 that was initially programmed with a Pickit3 using LVP DISABLED and then the snap could not program it. You get a message in IPE. I had to recompile the program with LVP ENABLED, program it once with a Pickit3 after which I could re-program that PIC again with a SNAP. As mentioned before if you have a virgin PIC then LVP is enabled by default but if you used to program with LVP Disabled (that includes the XWisp as far as I know) then you need to re-program your PIC first with LVP enabled.

Kind regards,

Rob

---

Van: jal...@googlegroups.com <jal...@googlegroups.com> namens Ptr <zet....@gmail.com>
Verzonden: zondag 22 maart 2020 16:36
Aan: jal...@googlegroups.com <jal...@googlegroups.com>
Onderwerp: [jallib] SNAP

 

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[Rob Hamerling]

Hi Rob, Peter,

On 2020/03/22 16:58, Rob CJ wrote:

I did a test. I have both a Pickit3 and SNAP connected so from IPE you can select one of the two. I could reproduce your problem with V5.35 but do not understand why it does not want to select the PIC18F4455 for the SNAP. Maybe they do not yet have included all PICs.

I read in the Programming Specs of the 18F4455 (and similars) section 2.6 that entering LVP is done differently than what I have seen with many other PICs (with which only MCLR needs to be pulled low). Maybe entering LVP by controllling the PGM-pin is not supported by Snap.   Just guessing..... I could not find any info about this.

[Ptr]

Hi Rob

 

Thanks for your answer. I don’t feel stupid anymore!

I will wait for the next update of Microchip.

Till then I use my good old 648.

Regards,

Peter

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[Rob Hamerling]

Hello Peter, Rob and others,

On 2020/03/23 10:04, Ptr wrote:

I will wait for the next update of Microchip.

Finally I found a table which shows which devices are supported by which tools.
The table is on my Linux system with MPLABX 5.35 in:

file:///opt/microchip/mplabx/v5.35/docs/Device Support.htm

I suppose with Windoz it will be on a similar place.

The table shows a.o. indeed that the 18F4455 is not supported by Snap (with this version of MPLABX).

[Rob CJ]

Hi all,

I found this info in the  Microchip forum.

MPLAB Snap Support

The MPLAB Snap In-Circuit Debugger/Programmer supports many, but not all, PIC MCUs and dsPIC DSCs at this time. The firmware is continually being upgraded to add support for new devices. For the most current list of supported parts, review the latest release notes located in MPLAB X IDE . To request device support or to report issues, email:  &nbsp Snap_...@microchip.com 

So give it a try.

Kind regards,

Rob

---

Van: jal...@googlegroups.com <jal...@googlegroups.com> namens Rob Hamerling <robham...@gmail.com>
Verzonden: maandag 23 maart 2020 16:17
Aan: jal...@googlegroups.com <jal...@googlegroups.com>

Onderwerp: Re: [jallib] Re: SNAP

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[Ptr]

Hi Rob CJ

 

Thanks. Now I know for sure.As I wrote: I will keep an eye on the updates.

 

Kind regards,

Peter

 

Genieten bestaat dankzij off-dagen!

 

Van: Rob CJ
Verzonden: maandag 23 maart 2020 18:30
Aan: jal...@googlegroups.com
Onderwerp: Re: [jallib] Re: SNAP

 

Hi all,

 

I found this info in the  Microchip forum.

MPLAB Snap Support

The MPLAB Snap In-Circuit Debugger/Programmer supports many, but not all, PIC MCUs and dsPIC DSCs at this time. The firmware is continually being upgraded to add support for new devices. For the most current list of supported parts, review the latest release notes located in MPLAB X IDE . To request device support or to report issues, email:  &nbsp Snap_...@microchip.com 

 

 

So give it a try.

 

Kind regards,

 

Rob

 

Van: jal...@googlegroups.com <jal...@googlegroups.com> namens Rob Hamerling <robham...@gmail.com>
Verzonden: maandag 23 maart 2020 16:17
Aan: jal...@googlegroups.com <jal...@googlegroups.com>
Onderwerp: Re: [jallib] Re: SNAP

 

Hello Peter, Rob and others,

On 2020/03/23 10:04, Ptr wrote:

 

I will wait for the next update of Microchip.

 

Finally I found a table which shows which devices are supported by which tools.
The table is on my Linux system with MPLABX 5.35 in:

file:///opt/microchip/mplabx/v5.35/docs/Device Support.htm

I suppose with Windoz it will be on a similar place.

The table shows a.o. indeed that the 18F4455 is not supported by Snap (with this version of MPLABX).

Regards, Rob.

--
Rob Hamerling, Vianen, NL

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[RobJ]

Hi Peter,

I hope that they will fix this but if I look at the investigation of Rob Hamerling I am not sure they will fix it for your specific PIC. If not you might need to switch to another PIC type...

Kind regards,

Rob

On Monday, March 23, 2020 at 11:31:52 PM UTC+1, Ptr wrote:

Hi Rob CJ

 

Thanks. Now I know for sure.As I wrote: I will keep an eye on the updates.

 

Kind regards,

Peter

 

Genieten bestaat dankzij off-dagen!

 

Van: Rob CJ
Verzonden: maandag 23 maart 2020 18:30
Aan: jal...@googlegroups.com
Onderwerp: Re: [jallib] Re: SNAP

 

Hi all,

 

I found this info in the  Microchip forum.

MPLAB Snap Support

The MPLAB Snap In-Circuit Debugger/Programmer supports many, but not all, PIC MCUs and dsPIC DSCs at this time. The firmware is continually being upgraded to add support for new devices. For the most current list of supported parts, review the latest release notes located in MPLAB X IDE . To request device support or to report issues, email:  &nbsp Snap_update@microchip.com 

 

 

So give it a try.

 

Kind regards,

 

Rob

 

Van: jal...@googlegroups.com <jal...@googlegroups.com> namens Rob Hamerling <robham...@gmail.com>
Verzonden: maandag 23 maart 2020 16:17
Aan: jal...@googlegroups.com <jal...@googlegroups.com>
Onderwerp: Re: [jallib] Re: SNAP

 

Hello Peter, Rob and others,

On 2020/03/23 10:04, Ptr wrote:

 

I will wait for the next update of Microchip.

 

Finally I found a table which shows which devices are supported by which tools.
The table is on my Linux system with MPLABX 5.35 in:

file:///opt/microchip/mplabx/v5.35/docs/Device Support.htm

I suppose with Windoz it will be on a similar place.

The table shows a.o. indeed that the 18F4455 is not supported by Snap (with this version of MPLABX).

Regards, Rob.

--
Rob Hamerling, Vianen, NL

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