PICAXE

Name:
on gosub
Syntax:

ON offset GOSUB address0, address1, ...addressN

Offset - is a variable/constant which specifies which subprocedure to use (0-N).

Addresses - are labels which specify which subprocedure to gosub to.

Description:

Gosub address specified by offset (if in range).

This command allows a conditional gosub depending on the value of the variable 'offset'. If offset is value 0, the program flow will gosub to address0, if offset is value 1 program flow will gosub to adddress1 etc. If offset is larger than the number of addresses the whole command is ignored and the program continues at the next line. The return command of the sub procedure will return to the line after on...gosub. This command counts as a single gosub within the compiler.

Applies To:
All
See Also:
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    Set LED according to variable value

    The 'on gosub' branch taken depends on the value of the b1 variable and as it increases a different LED will be set.

    Code Example:
    reset1:	let b1 = 0
	low B.0
	low B.1
	low B.2
	low B.3

main:	pause 1000
	inc b1
	if b1 > 3 then reset1
	on b1 gosub btn0,btn1, btn2, btn3
	goto main

btn0:	high B.0
	return
btn1:	high B.1
	return
btn2:	high B.2
	return
btn3:	high B.3
	return
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    Comments

    • Posted by johnlong

      Hi Technical

      The possitioning of the inc b1 is in the wrong place. Where it is the gosub btn0

      is not inacted

      To work correctly it needs to be

      main:

      pause 1000

      if b1 >3 then reset1

      on b1 gosub btn0,btn1,btn2,btn3

      inc b1

      As b1 would never be 0 at the gosub command

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