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Forum Index : Microcontroller and PC projects : Use of pins

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foxleyboy
Newbie

Joined: 09/06/2019
Location: United Kingdom
Posts: 28
Posted: 02:45pm 30 Sep 2019
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Hi.
I keep getting the message 'Pin xx is reserved on startup' !
So are these pins un usable? If not, then how do I use them.

Also Pins 4 and 5 are used for the PGED and PGEC lines on V2 so are these still usable or does the 'bridge chip' go to high impedance when you run a program?

Many thanks
Roy
 
lizby
Guru

Joined: 17/05/2016
Location: United States
Posts: 3470
Posted: 03:46pm 30 Sep 2019
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  foxleyboy said  I keep getting the message 'Pin xx is reserved on startup' !
So are these pins un usable? If not, then how do I use them.


Which device?

Which pins?

Which mmbasic version?

Welcome to the forum--but when you post, provide information to help us to help you.
Edited 2019-10-01 01:47 by lizby
PicoMite, Armmite F4, SensorKits, MMBasic Hardware, Games, etc. on fruitoftheshed
 
CaptainBoing

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Joined: 07/09/2016
Location: United Kingdom
Posts: 2171
Posted: 04:16pm 30 Sep 2019
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  foxleyboy said  Hi.
Also Pins 4 and 5 are used for the PGED and PGEC lines on V2 so are these still usable or does the 'bridge chip' go to high impedance when you run a program?

generally they are only "reserved" when programming (flashing) the firmware. You can use them in your own code
 
foxleyboy
Newbie

Joined: 09/06/2019
Location: United Kingdom
Posts: 28
Posted: 04:48pm 30 Sep 2019
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I am useing the LCD backpack V2.
Prog software is V 3.8.1 OS Ver:10
Pins that so far give the  'Pin xx is reserved on startup' message are Pins 25 and 14. There may be others.
 
foxleyboy
Newbie

Joined: 09/06/2019
Location: United Kingdom
Posts: 28
Posted: 04:49pm 30 Sep 2019
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Maybe I should also say the this Prog software is MMEDIT
 
matherp
Guru

Joined: 11/12/2012
Location: United Kingdom
Posts: 10573
Posted: 05:15pm 30 Sep 2019
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  Quote  'Pin xx is reserved on startup' message are Pins 25 and 14


These are the SPI pins used to drive the display. If you are not using the display type OPTION LCDPANEL DISABLE and they will be returned to normal usage. DON'T DO THIS IF YOU DON'T UNDERSTAND HOW TO RE-CONFIGURE THE DISPLAY FOR FUTURE USE>
 
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