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Geoffg

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Joined: 06/06/2011
Location: Australia
Posts: 3167

Posted: 12:40am 27 Jan 2017

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For various reasons (set out below) in the final version of MMBasic V5.3 I am planning to change the pin used for PWM2B on the 64-pin Micromite Plus from pin 47 to 32. A change like this could impact existing designs so I am floating the idea here so that someone can object if this will affect their project.

A not so short explanation:

When I originally defined the pin numbers for the 64-pin MM+ I put the PWM2B output on the same pin used by the second SPI channel. I don't know why, momentary loss of sanity might be the explanation. Later this SPI channel became important because it is used for touch and the SD card. Most PCBs for the MM+ use these features so I doubt than anyone is actually using PWM2B.

By moving PWM2B to pin 32 that output now becomes available, which is important because the PLAY WAV and PLAY TONE commands in V5.3 both use PWM2B (as well as PWM2A). Without this change the 64-pin MM+ would be unable to use PLAY WAV because the WAV file must be played from an SD card.

The pinouts used by the 100-pin MM+ will not be changed.

Geoff

P.S. Ver 5.3 should be released next week.Edited by Geoffg 2017-01-28

Geoff Graham - http://geoffg.net

mikeb

Senior Member

Joined: 10/04/2016
Location: Australia
Posts: 173

Posted: 10:53am 27 Jan 2017

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@ Geoff.
I think you are the most sane man I have come across. S#$t happens.
For the added benefits I think re-assigning the pin is a 'no brainer'.
Thankyou to you, Peter M, and all the rest for your work in helping us achieve great things.
Regards, Mike B.

There are 10 kinds of people in the world.
Those that understand binary and those that don't.

Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9078

Posted: 03:20pm 27 Jan 2017

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Gets my thumbs up.

I am working on a new board for something now, so that works for me, and is great timing, cos I can design that change in now.

Smoke makes things work. When the smoke gets out, it stops!

panky

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Joined: 02/10/2012
Location: Australia
Posts: 1099

Posted: 07:11pm 27 Jan 2017

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Geoff,

Does this have any impact on Peter's MM plus board or Circuit Gizmo's Microboard, both of which have an Arduino pinout where pin 32 is used as D6?

Would D6 (pin 32) still be useable as a Digital out? Not important, just curious.

Thanks,
Doug.

PS. Fantastic job with 5.3 - all the new features make my head hurt just thinking about how I might use them

Edited by panky 2017-01-29

... almost all of the Maximites, the MicromMites, the MM Extremes, the ArmMites, the PicoMite and loving it!

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