About how to generate C header files with MATLAB scripts.

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Hi guys:

I have a question about how to generate some C datatypes with *.m in which buses/enumerations are defined.

For example, I have a script looks like this:

function bus() 
% BUS initializes a set of bus objects in the MATLAB base workspace 
% Bus object: Bus1 
clear elems;
elems(1) = Simulink.BusElement;
elems(1).Name = 'a';
elems(1).Dimensions = 1;
elems(1).DimensionsMode = 'Fixed';
elems(1).DataType = 'double';
elems(1).SampleTime = -1;
elems(1).Complexity = 'real';
elems(1).Min = [];
elems(1).Max = [];
elems(1).DocUnits = '';
elems(1).Description = '';
elems(2) = Simulink.BusElement;
elems(2).Name = 'a1';
elems(2).Dimensions = 1;
elems(2).DimensionsMode = 'Fixed';
elems(2).DataType = 'double';
elems(2).SampleTime = -1;
elems(2).Complexity = 'real';
elems(2).Min = [];
elems(2).Max = [];
elems(2).DocUnits = '';
elems(2).Description = '';
Bus1 = Simulink.Bus;
Bus1.HeaderFile = 'bus.h';
Bus1.Description = '';
Bus1.DataScope = 'Exported';
Bus1.Alignment = -1;
Bus1.Elements = elems;
clear elems;
assignin('base','Bus1', Bus1);

Then I'd like to generate a C header file like this:

typedef struct {
  real_T a;
  real_T a1;
} Bus1;

I don't know which tool can help me do this easily, because I don't want to create a real Simulink project and generate entire source code includes *.c and *.h.

So any idea is appreciated!