Reading constants and variables from external header files in Matlab Coder
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Philip Bergander on 2 May 2019
If I have the C header file external_vars.h containing:
const int ext_var = 5;
How do I use it in a Matlab Coder generated C function? The following code doesn't work, as ext_var is not defined in the Matlab code.
function external_test() %#codegen
a = ext_var;
Denis Gurchenkov on 2 May 2019
If you have an Embedded Coder license, you can use coder.storageclass to bind an extern C variable to a variable in MATLAB function: https://www.mathworks.com/help/ecoder/ref/coder.storageclass.html?s_tid=doc_ta
Without Embedded Coder, one possible workaround is to have a C function that reads/writes to this variable, and call that C function using coder.ceval.