MATLAB与外部C ++函数：coder.ceval传递一个结构的函数 [英] Matlab with external C++ function: coder.ceval pass a structure to a function

问题描述

我想从Simulink中Matlab的功能结构传给使用coder.ceval（）和coder.cstructname外部C ++函数（）。当我尝试在Simulink中使用的部署，以五金工具的一个Arduino板由于运行code我得到的错误：

I’m trying to pass a Structure from a Matlab function in Simulink to an external C++ function using the coder.ceval() and the coder.cstructname(). When I try to run the code on an Arduino Due board using the deploy to hardware tool in Simulink I get the error:

error: invalid use of incomplete type 'struct MyStruct' 
error: forward declaration of 'struct MyStruct'

我使用The MathWorks公司从这个例子code，但使用C ++函数，而不是C函数：

I’m using the example code from mathworks but use a c++ function instead of a c function:

头use_struct.h：

Header use_struct.h:

#include <tmwtypes.h>

typedef struct MyStruct
{
    double s1;
    double s2;
} MyStruct;

void use_struct(struct MyStruct *my_struct);

C ++函数use_struct.cpp：

C++ function use_struct.cpp:

 #include <stdio.h>
 #include <stdlib.h>
// #include "use_struct.h"  // Doesn’t work when I include it here


extern "C" void use_struct(struct MyStruct *my_struct)
{
  double x = my_struct->s1;
  double y = my_struct->s2;
}

MATLAB函数：

Matlab function:

structVar.s1 = 1;
structVar.s2 = 2;

if strcmp(coder.target,'rtw'),


coder.cinclude('use_struct.h');
coder.cstructname(structVar, 'MyStruct', 'extern');

coder.ceval('use_struct', coder.ref(structVar));

end

我需要它为后来的code C ++函数。不过，我也没有为externC的C函数尝试过，但它不反正工作。谁能帮我解决这个问题？

I need it to be a C++ function for the later code. However I also tried it with a c function without the extern "C" but it doesn’t work anyway. Can anyone help me with this problem?

推荐答案

我找到了解决办法。我必须包括在use_struct.cpp也与C头use_struct.h：

I found the solution. I had to include the c header use_struct.h in the use_struct.cpp also with:

extern "C"
 {
   #include "use_struct.h"
 }

这篇关于MATLAB与外部C ++函数：coder.ceval传递一个结构的函数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！