ENUM

PET V2.2

Hey together

I have a little problem.
How can I use ENUMs in the SPIN language.
I can find it in the manual that it should work.
But i can't find how?

i'm looking for a examble like in C:

enum Modus {play, stop};

Thanks for helping

soshimo

Enumerations are declared in a CON section. You precede the labels with the first number in the series. I don't think there is any way to do a non-sequential enumeration (e.g powers of 2). Here is an example (out of the manual):

CON 'Declare modes of operation
   #0
   RunTest 'Run in test mode
   RunVerbose 'Run in verbose mode
   RunBrief 'Run with brief prompts
   RunFull 'Run in full production mode

Using those declarations you can do something like this:

case Mode
   RunTest : <test code here>
   RunVerbose : <verbose code here>
   RunBrief : <brief code here>
   RunFull : <full code here>

or

if Mode > RunVerbose
   <brief and full here>

Using your example

CON
   #0
   play
   stop

VAR
   long Mode

PUB DoAction

   Case Mode
      play : doplay   ' call the play function
      stop : dostop   ' call the stop function

Post Edited (soshimo) : 12/20/2008 11:03:21 AM GMT

PET V2.2

ok thanks a lot

I think in the examble you have first to set the modus before you can use your case function.
But i know now how it works.
I didn't think how i can do it with two seperate deifnitions.

thanks

soshimo

Yes, you are correct, you have to set the modus variable's value - either through initialization, a calculation based on the current state, etc... The skies the limit, but you do need to assign the variable a value for it to be meaningful.