Help with using the result value returned from a method

DRMorrison

Hi there,
I'm trying to figure out how to use the result in the calling method that is returned from the called method--hope that's clear.
This should help. This is an example only, but is representative of my code--can't get to it right now.

PUB Main
 Start_Something
 <do some other things>


PUB Start_Something : Fail
 <check some pins>
 if SomePin == 0
  <things are good here>
 else
  Fail := 1

How do I check the result returned from the Start_Something method in the Main method?
I was able to find out how to set the result to be returned in the manual, but not how to use it once returned.

Thank you, Daniel

kuroneko

Either by using

if start_something
    ' response

or you can assign the result to some other variable and use it later:

value := start_something

DRMorrison

So, would it look like this?

PUB Main
 if Start_Something == 1
  <respond to returned result being 1>
 <do some other things>




PUB Start_Something : Fail
 <check some pins>
 if SomePin == 0
  return
 else
  Fail := 1

kuroneko

DRMorrison wrote: »

So, would it look like this?

PUB Main
 if Start_Something == 1
  <respond to returned result being 1>
 <do some other things>

Basically yes, == 1 may be optional in this case (any non-zero value is promoted to TRUE). Note that <do some other things> will be executed regardless of the returned result. If you want to limit it to the zero response then you'll have to use if/else.

DRMorrison

Thank you. I feel that I understand that clearly.

Yes, <do some other things> will be executed, along with many other lines following that statement.
I'm looking for a way to determine in the Main method whether or not there was success in the
Start_Something method. I suppose that I could have used a global variable, but why not use
the return value, since it's there.

And just for clarification, would this also work?

PUB Main
 if Start_Something
  <respond to returned result being TRUE>
 <do some other things>
 <do some more things>
 <do many more things>




PUB Start_Something 
 <check some pins>
 if SomePin == 0
  <things are good here>
 else
  return TRUE

kuroneko

Sure, why not? Depending on what <things are good here> involves you could get away with:

PUB Start_Something 
 <check some pins>
 return SomePin <> 0

And just to re-iterate, you don't have to return TRUE, any non-zero value returned from method will be accepted by an if method as TRUE.

DRMorrison

Thank you for the lesson.

Daniel