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Forum Index : Microcontroller and PC projects : F4 QUESTION

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OA47

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Joined: 11/04/2012
Location: Australia
Posts: 1013

Posted: 10:25am 28 Jul 2020

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This may be one for Peter M(agician) but I am happy to take advice from anyone. I have had times when the F4 has lost connection to the console program (a WIN10 issue I think) and to regain control of the F4 I need to power cycle the board. The strange thing is that the loaded program disappears and the OPTIONS revert to LCDPANEL_16 RLANDSCAPE and no TOUCH defined. Can you tell me where these options are held and why they should revert to REVERSE landscape etc?

OA47

Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3308

Posted: 11:51am 28 Jul 2020

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Much more information is needed.
What version of MMBasic?
What platform (Micromite, Micromite Plus, Maximite, etc)?
Do you use F4 at the command line, in MMEdit, etc?
Anything else that is pertinent?

From the sound of it you are using a Micromite and in that case the options are stored in flash. I have no idea why the options change but I would suspect a bad power supply as the PIC32 is more sensitive to power supply voltage and noise when writing to flash.

Geoff

Geoff Graham - http://geoffg.net

CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
Posts: 2171

Posted: 12:36pm 28 Jul 2020

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think he means the ArmMite F4

I have had the same problem with the USB connection being flaky and there was a fairly good discussion (if a bit fragmented) when the F4 first came about (as a 'mite). For me, although i never solved the problem, it was definately associated with the USB controller on the board and by changing the jumpers and going direct to the console pins (using my normal method of a CH340) the problem went away. So I never fixed the problem with the USB thingie on the F4 but I successfully circumvented it.

have a rummage through this thread. https://www.thebackshed.com/forum/ViewTopic.php?TID=11334&P=1
Edited 2020-07-28 22:46 by CaptainBoing

OA47

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Joined: 11/04/2012
Location: Australia
Posts: 1013

Posted: 10:14pm 28 Jul 2020

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Quote Much more information is needed.

Sorry Geoff for not being more descriptive, with all the variations of mites available using MMBasic it is easy to get focused on the current type that is being used in a project.
As CaptainBoing has replied I am talking about an ARMmite F4 and indeed I don't think that the issue is MMBasic related but more in the hardware/firmware of the ARMmite and the way the NVRam is used.

OA47

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