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Forum Index : Microcontroller and PC projects : TFT Maximite PIN(20)

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Wajkaj
Newbie

Joined: 03/11/2012
Location: Netherlands
Posts: 14
Posted: 09:31pm 25 Jan 2014
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The TFT Maximite might have a problem. In the schematic of the TFT version, pin(20) is connected to pin 11 of the PIC32. In Geoff schematic pin(20) is connected to pin 17 of the PIC32. That's why pin(20) is not working. So don't use pin(20). Maybe Carsten Meyer can tell us more.

Edit : I have cut the trace to pin 11 of the PIC32 en connected pin(20) to pin 17 of the PIC and all is working well now. Still have shaking hands, LOL.Edited by Wajkaj 2014-01-27
Started with LNW80.
 
jman

Guru

Joined: 12/06/2011
Location: New Zealand
Posts: 711
Posted: 08:20am 26 Jan 2014
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Hi Wajkaj

I think you found a bug in the TFT circuit
I built mine using Mick's UBW32 adapter so this error was not
present in my build

Regards
Jman
 
Wajkaj
Newbie

Joined: 03/11/2012
Location: Netherlands
Posts: 14
Posted: 06:01am 07 Feb 2014
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I have contacted Carsten via Segor Electronics and he knows about it now. Look at https://github.com/heise/MAXIMITE. I think there wiil be a version 1.4 very soon. Regards
Johan.
Started with LNW80.
 
Zonker

Guru

Joined: 18/08/2012
Location: United States
Posts: 761
Posted: 07:27pm 07 Feb 2014
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So, Is the version 3 schematic correct but the board layout had the error..?

I would like to get a few of these ready to go 5" panels but could never get through the web site... I built one up like jaman did with the UBW32 and seems to work ok... Johan, did you get yours on the site..? I hope somehow we can get ahold of the updated ones when they come out... Thanks for the info..!!
 
Wajkaj
Newbie

Joined: 03/11/2012
Location: Netherlands
Posts: 14
Posted: 01:47am 08 Feb 2014
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Zonker, I bought it at Segor Electronics at their site. The fault is already in the schematics of V1.3. Not a big deal, if you can handle a small soldering iron and a small knife, then you can fix it yourself. Mine is working fine now and i am happy with it. With the help of the demo programs it is easy to make a program yourself. I tested the TFT-maximite with Don's Test-a-mite. Good and handy board.

Johan.
Started with LNW80.
 
Greg Fordyce
Senior Member

Joined: 16/09/2011
Location: United Kingdom
Posts: 153
Posted: 11:43pm 08 Feb 2014
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Johan, so as I understand it you purchased the tft maximite from segor and pin 20 doesn't work on their unit. I would also like to get a tft MM but I need to use COM 2 (which uses pin 20) so this would be a problem for me. I wonder, can someone tell me if the problem could be fixed by changing the pin assignment in the source code and then update the tftMM with the new software? Maybe segor could provide a modified update for their units?

Greg.
 
Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3196
Posted: 02:53am 09 Feb 2014
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Sorry, this issue cannot be fixed in the firmware. You will have to modify the board.

Geoff
Geoff Graham - http://geoffg.net
 
Greg Fordyce
Senior Member

Joined: 16/09/2011
Location: United Kingdom
Posts: 153
Posted: 03:28am 09 Feb 2014
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Thanks Geoff, I'll hold off ordering one from segor for now. There is a thread regarding this issue here, it's in German but Google translate does a reasonable job.
 
Greg Fordyce
Senior Member

Joined: 16/09/2011
Location: United Kingdom
Posts: 153
Posted: 11:36pm 24 Mar 2014
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The newest version of the TFT Maximite with the pin 20 problem fixed will be availible mid April, heres a quote from Segor.de when I emailed them.

  Quote  thank you very much for your order. TFT Maximite are currently in
production (the first series was outsold) with some minor
improvements, Pin20-Problem will also be fixed with the new series.
The kits will become available end of week 15 or beginning of week 16.


For English speaking folks like me the easiest way to order one is to email them directly to place an order, the website is in German and various translate sites don't seem to do a good job of translating it.

Greg
 
bigfix
Senior Member

Joined: 20/02/2014
Location: Austria
Posts: 128
Posted: 03:46am 25 Mar 2014
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I talked with Segor when I was in Berlin two weeks ago.
He also mentioned that some connectors will be moved to the edge to be more accessible

No plans about a custom housing
They have a plain plastic/aluminium box where they cut out the display for demo

Nice shop, with a zillion parts on stock and very helpful guys there !
 
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