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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9750

Posted: 01:58am 17 Apr 2018

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Hi all.

QUESTION: With the LOCAL command for use in Sub's, can different subs have different LOCAL commands with the same variable name? I thought you could, but it it throwing a wobbly when I try:

Quote SUB SETUP_HC12
CPU 10
Const HC12=17 'HC12 SET line. (sleep/wake)
SetPin HC12,DOUT:Pin(HC12)=1 'HC12 SET line
Open "COM1:9600" as #1 'Default baud-rate for a new HC12 is 9600...
Pin(HC12)=0 'Enter command mode
Pause 50 'Wait for module to respond
Print "Now attempting to configure new HC12 module @ 9600 baud..."
Print
Print "<HELLO MODULE?> ";
SET_HC12("AT")
Print "<SET 1200 BAUD> ";
SET_HC12("AT+B1200")
Print "<SET CHANNEL 64(458.6MHz)> ";
SET_HC12("AT+C064")
Print "<SET FU4 MODE> ";
SET_HC12("AT+FU4")
Print "<SET 100mW OUTPUT> ";
SET_HC12("AT+P8");
Pause 250
Pin(HC12)=1 'Exit command mode - changes take effect now!
Print "DONE! Execute CHECK_HC12 to confirm settings."
Close #1
End SUB

SUB CHECK_HC12
CPU 10
Const HC12=17 'HC12 SET line. (sleep/wake)
LOCAL D$
SetPin HC12,DOUT:Pin(HC12)=1 'HC12 SET line
Open "COM1:1200" as #1 '1200 baud now, as module should be programmed...
Pin(HC12)=0 'Enter command mode
Pause 50 'Wait for module to respond
Print "QUERY MODULE:"
Print
Print #1,"AT+RX"
Print
Pause 1000
D$=Input$(Loc(#1),#1)
Print D$
Print
Print "DONE."
Close #1
Pin(HC12)=1
End SUB

End

SUB SET_HC12(E$)
LOCAL D$,E$
Print #1,E$
Pause 150
D$=Input$(Loc(#1),#1) 'Suck HC12 response from buffer
Print D$
Pause 150
End SUB

I am getting 'E already declared.' errors.

As one sub calls the other, D$ is throwing an error, but I figured you could have LOCAL D$,E$ in one Sub, and another LOCAL D$,E$ in another sub and it would not care - as they are local to the sub they are defined in, and vanish into the great RAM monster in the sky when the Sub ends.

Do I actually have that wrong?

If I change the string names to something else, no problem, so that is the workaround I am using for now.Edited by Grogster 2018-04-18

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Phil23
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Joined: 27/03/2016
Location: Australia
Posts: 1667

Posted: 02:12am 17 Apr 2018

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That's a bit Strange Grog,

I'd expect you could & this little bit of code works in DOS.

Quote Do

Sub1
Sub2
Pause 1000

Loop

Sub Sub1

Local N%

for n%=1 to 3
Print "Sub1 N=";n%
Next N%

End Sub

Sub Sub2

Local N%

for n%=1 to 3
Print "Sub2 N=";n%
Next N%

End Sub

Phil.Edited by Phil23 2018-04-18

Phil23
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Joined: 27/03/2016
Location: Australia
Posts: 1667

Posted: 02:17am 17 Apr 2018

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This works too, when Sub2 is called while still in Sub1.

Quote Do

Sub1
'Sub2
Pause 1000

Loop

Sub Sub1

Local N%

for n%=1 to 3
Print "Sub1 N=";n%
Next N%
Sub2

End Sub

Sub Sub2

Local N%

for n%=1 to 3
Print "Sub2 N=";n%
Next N%

End Sub

Edit:- Still works if I call Sub2 before the NEXT N in Sub1 also.
Edited by Phil23 2018-04-18

Azure

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Joined: 09/11/2017
Location: Australia
Posts: 446

Posted: 02:47am 17 Apr 2018

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You are using E$ as the passed argument and a local variable.

Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9750

Posted: 03:44am 17 Apr 2018

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!!!!!!!!

How the hell did I miss that, for God's sake.......(rhetorical!)
All fixed.

Feeling a little silly now.

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

Azure

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Joined: 09/11/2017
Location: Australia
Posts: 446

Posted: 04:19am 17 Apr 2018

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Glad I spotted it first then.

Even more happy it is all working.

TassyJim

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Joined: 07/08/2011
Location: Australia
Posts: 6351

Posted: 05:06am 17 Apr 2018

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I don't think you should be using 'CONST" in a SUB/FUNCTION
If it is a true CONST, it belongs in the main code with the GLOBALs
If not a true CONST, use a LOCAL variable

Jim

VK7JH
MMedit

Phil23
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Location: Australia
Posts: 1667

Posted: 06:06am 17 Apr 2018

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Azure said You are using E$ as the passed argument and a local variable.

Was pretty easy to look straight past that.

P&G Zero.
Azure One.

Grogster

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Location: New Zealand
Posts: 9750

Posted: 06:32am 17 Apr 2018

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@ Jim - I will take your comments about CONST under advisement. Yes, I will change that.

[Quote=Phil23]P&G Zero[/Quote]

I see what you did there.

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Azure

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Location: Australia
Posts: 446

Posted: 06:41am 17 Apr 2018

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Lets not start any scoring, I am just a newbie to the MM and grogster designs some lovely boards

Grogster

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Location: New Zealand
Posts: 9750

Posted: 06:49am 17 Apr 2018

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Very kind, but Azure does get an approval tick for noticing this one!

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Chopperp

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Joined: 03/01/2018
Location: Australia
Posts: 1106

Posted: 11:09am 17 Apr 2018

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You're way ahead in the number of Posts count though , Mr Grogster

ChopperP

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