PIC - Use of 'ifdef' directive

[SparkyChris]

Hello Everyone,

I'm hoping one of you smart people might be able to help my understanding on something.
I have been given some code to familiarize myself with, and I'm a bit confused with the use of the 'setdef' as shown below, can anyone shed some light on what its doing?.
This is code written in MBLAB IDE for a PIC18F452

Code: [Select]

ifdef #GaugeResultLine1
   setdef @GaugeResultLine1, #GaugeResultLine1
endif

Many Thanks,
Chris

[cv007]

'setdef' is most likely a macro (in the same file, or include file)
probably something like-

setdef macro a,b
    #define a b
    endm

so, basically- if #GaugeResultLine1 is defined, also define @GaugeResultLine1 to be the same

[SparkyChris]

Thanks, that was spot on. I searched for, and found the macro inside an include file...and a few more which explains a few others!