if..else

ice-egoz · 2004-09-16 02:49

this is my statement: area18: IF latitudeMin=17 AND longitudeMin=37 THEN DEBUG "Tuas South"
can i do this:
area18: IF latitudeMin=17 AND longitudeMin=37 THEN serData=·"Tuas South"

I know that the above statement will give me an error.. but what other ways can i use to do this?

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Fe2o3Fish · 2004-09-16 04:00

The syntax you're using would be OK if you add this line

' {$PBASIC 2.5}

to the beginning of your program. This is presuming that you're
using the newer Basic Stamp Editor/Development System. Your
statement would fall under the the single line syntax of IF...THEN...ELSE

If you're not using the new PBASIC 2.5 syntax then the part
after the THEN should be a statement label. If this is the case
then you could try something like this:

   IF not (latMin=17 AND lonMin=37) then keep_testing
   DEBUG "Tuas South"

   keep_testing:
   ' more code here...

Well, it works for me.

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-Rusty-
--
Rusty Haddock = KD4WLZ = rusty@fe2o3.lonestar.org
**Out yonder in the Van Alstyne (TX) Metropolitan Area**
Microsoft is to software what McDonalds is to gourmet cooking

Jon Williams · 2004-09-16 04:44

PBASIC does not support string types. What you can do is use string pointers -- change your pointer and then use a subroutine to print it.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

ice-egoz · 2004-09-16 05:01

I have many lines of similar codes:

serData······ VAR········· Byte(4)

area33: IF latitudeMin=18 AND longitudeMin=38 THEN DEBUG "Tuas" ' over here can i make it serData? rather tham DEBUG
area34: IF latitudeMin=19 AND longitudeMin=38 THEN DEBUG "Tuas"
area35: IF latitudeMin=20 AND longitudeMin=38 THEN DEBUG "Tuas/AYE"

instead of wasting memory, I decided to use a VAR Byte(4) to store the String rather than DEBUG. I am using version 2.5..

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I need all ya guidance Masters. [noparse]:)[/noparse]

Jon Williams · 2004-09-16 05:13

You could change DEBUG to SEROUT with the correct parameters -- this would consume a lot of code space though. Better to change the THEN portion of each line to changing the pointer to the string, then calling a subroutine that prints it.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

ice-egoz · 2004-09-16 05:59

whats a pointer to a string?

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I need all ya guidance Masters. [noparse]:)[/noparse]

Jon Williams · 2004-09-16 15:01

To reduce the number of SEROUTs in a program one can store their strings in DATA statements; this is quite common and some of the demo programs from Parallax that you're using do this.· Each string has a location in memory -- a variable can be set to the location of the first character of the string before calling the printing (SEROUT) routine; this is what is meant by pointing.· When the varialbe is set to the first location of the string, it is "pointing" to it for the printing loop that might look something like this:

Print_String: 
  DO 
    READ eeAddr, char 
    eeAddr = eeAddr + 1 
    IF (char = 0) THEN EXIT 
    SEROUT TxPin, Baud, [noparse][[/noparse]char] 
  LOOP 
  RETURN

For this code, "eeAddr" is the pointer to the string.· It is set to the first location of the (zero-terminated) string before calling the routine.

Our WAM and StampWorks books have examples that will help you -- you might want to take a week or so to work through them before continuing with your sophisticated experiments.

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Jon Williams
Applications Engineer, Parallax
Dallas Office

if..else

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