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OS28 pointer support


JamesMc Aug 31, 2016 09:28 PM

I was attempting to update a CR1000 with a new program that uses the pointer operators ! and @. 

The program update will not compile on the CR1000.  The datalogger is reporting its OS as:

OSVersion: CR1000.Std.28
OSDate: 01/28/2015
OSSignature: 29713
SerialNumber: 70325
RevBoard: 019.008

My understanding is that OS28 does introduce support for pointer operations?

192. Added ! and @ operators that provides pointers to variables.


JDavis Aug 31, 2016 09:35 PM

OS28 did add support for pointer operators. The pointer syntax in CRBasic is a bit different than in C++ or VB.Net

Refer to the help in CRBasic for an example.


JamesMc Aug 31, 2016 09:45 PM

I should add the that program version I am using has been compiled and tested successfully locally, but it fails to compile on the station mentioned in the post.  When I comment out the lines that use the pointer operators, it compiles and runs.


JDavis Aug 31, 2016 09:53 PM

Check what operating system version is on the datalogger. The compiler you have on your computer isn't necesarily the same as the OS version you have on your datalogger.


JamesMc Aug 31, 2016 10:31 PM

Check what operating system version is on the datalogger.

I posted the OS version of the datalogger in my original post CR1000.Std.28

I reverted the OS to 28 from 29 on my bench datalogger to try and replicate error.  Same result: compile error.

Incomplete expression:  Pointer = @(StaticVariableNames(I))    

 As you pointed out, the compiler on my PC is a different version:

C:\Campbellsci\Lib\Compilers>cr1comp -d
cr1comp VERSION:CR1000.Std.29  DATE:02/16/2016

 Is it possible to download previous versions of compilers?

Found the reason, fixed in OS29:

Fixed Pointer = @(Setting) where variable reference by setting is an array of type string.

   

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