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Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185

Posted: 10:43pm 24 Apr 2017

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Hi all,

Just came across the following:-

? mm.ver
5.0302
> ? mm.device$
Micromite Plus
> list

If files$ = "" Then
Print "No files found"
EndIf

f$=Dir$("*.*",FILE)
Do While f$ <> ""
Print f$
f$ = Dir$()
Loop
> run
No files found

CPU exception #13 (possible divide by zero) at address 0x9D01BBA0
Processor restarted

>
>

Obvious I suppose but will really toss many.
Most of the code above is from the DIR$() example on page 46 of the plus manual.

What is the best way to handle this situation? That is a new or blank SD card with no files.

I will test files$ first to see if it is blank (hence my first if statement) and then if not recurs through the files.

I think it really needs pointing out in the manual as divide by zero is not at all obvious to most.

EDIT: Just realised my first if statement seems to work but for the wrong reasons.
Ignore these comments.Edited by Bizzie 2017-04-26

Rob White

Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3165

Posted: 01:00am 25 Apr 2017

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Any CPU exception is not good and should never happen.
I will have a look at it tomorrow and see what is going on.

Geoff

Geoff Graham - http://geoffg.net

Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185

Posted: 12:21pm 25 Apr 2017

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Thanks Geoff,

I have not got much time this morning. I will try another board as I just changed SD cards and got different results! - That is SD card not present.

Regards

Rob White

Bizzie
Senior Member

Joined: 06/07/2014
Location: Australia
Posts: 185

Posted: 10:51pm 25 Apr 2017

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Geoff,

Afraid this was yet another case of "finger trouble"!

I disabled the SD card and then did another option sdcard 24 (SD card on display) and all was fine. I can not tell you if option list indicated 24 or not.

Rob White

Geoffg

Guru

Joined: 06/06/2011
Location: Australia
Posts: 3165

Posted: 12:37am 26 Apr 2017

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Yes, I just tested it and no exception. Phew!!

Geoff Graham - http://geoffg.net

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