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Troyfa
Newbie

Joined: 23/01/2016
Location: Australia
Posts: 9

Posted: 06:07pm 24 Jan 2016

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I have a momentary push button connected to the earth with a 100n cap connected in parrellel with it as shown in this pic...

In MMbasic 4.5 when I specify

setpin BUTTON, DIN, PULLUP, OnButton

it doesn't reconize the PULLUP keyword, so I have omitted it..

When I wave my hand over it from about 10cm above it.. it will activate the OnButton interrupt and run that code... I haven't even pressed the button...

Oh yeah the code I used is

setpin BUTTON, INTL, OnButton

any ideas on how to fix it?

Thanks for the replies

Frank N. Furter
Guru

Joined: 28/05/2012
Location: Germany
Posts: 947

Posted: 08:19pm 24 Jan 2016

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Hi Troyfa,

you MUST use a pullup!!! It's equal if you use the internal one or if you connect a external pullup! Try a 10K to 3V3. Your signal line is floating and reacts in other respects to your hand or similar disturbances.

Frank

paceman
Guru

Joined: 07/10/2011
Location: Australia
Posts: 1329

Posted: 08:44pm 24 Jan 2016

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Welcome to TBS Troya.

EDITED: mistakes in the explanation - below is correct.

As Frank says you need an external pullup. The programmed PULLUP etc. option is also not available in the Minimite (actually called the Mini-Maximite) or the Maximite, i.e. the MMBasic used for the MX695 and MX795 chips. It is only available for the later Micromites, i.e. the MMBasic running on the MX170 and MX470 chips (and a couple of others).

When you downloaded MMBasic V4.5 did you also download the manual? The later versions of the Maximite/Mini-Maximite software had two manuals, one for hardware and one for software. The MMBasic V4.5 software manual is called the "MMBasic Language Manual". There are quite a few differences to MMBasic for the Micromites that you'll need to know.

BTW, your bottom line of code looks fine for V4.5

Greg
Edited by paceman 2016-01-26

Troyfa
Newbie

Joined: 23/01/2016
Location: Australia
Posts: 9

Posted: 10:25pm 25 Jan 2016

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Thanks for the replies Paceman and Frank...

I will give it a try...

Yeah I read all the manuals, but I did download quite a few MMbasic firmware stuff...

Troyfa
Newbie

Joined: 23/01/2016
Location: Australia
Posts: 9

Posted: 10:26pm 25 Jan 2016

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..Edited by Troyfa 2016-01-27

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