How can I tell EmbeddedCo​der/Simuli​nkCoder to not evaluate expressions containing Matlab tunable parameters when generating C-code from Simulink?

3 views (last 30 days)
Hi, I have a saturation block in Simulink where I set upper and lower limits based on a tunable parameter and have the output port generated as global variable:
In the generated C-code the lower limit expression is evaluated to:
srt_gyroXsaturated = rtU.gyro_X >= srt_gyroLimitX ? srt_gyroLimitX :
rtU.gyro_X <= -0.349040151F ? -0.349040151F : rtU.gyro_X;
What I want is that '-srt_gyroLimitX' is not evaluated to '-0.349....' but left "as is" in the generated code. How can I achive that?

Answers (2)

Saurabh Gupta
Saurabh Gupta on 2 Aug 2017
For tunability in code generation, the parameter needs to be a variable. Parameters specified as expressions are evaluated and inlined. You could specify the limits as 2 separate variables to ensure that code generation preserves the tunability.

Ben Rancici
Ben Rancici on 30 Sep 2019
Same question as Matphree: how to prevent block parameter evaluation in the generated code?
I don't understad Saurabh Gupta's solution.

Categories

Find more on Simulink Functions in Help Center and File Exchange

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!