Can I have a bus whose elements are buses with several dimensions?

Hi there,

I got a header file which is something like:

struct RPO_corners
{
  float cod[3];                
  float orient[9];              
  float rotVel;                 
  float defl;
  float factor;             
  float TTTT;              
};

struct Output
{
  struct Vector3    coord,                  
                    speed,
                    accel,                 
                    angspeed;
 struct Matrix3x3  orientation_matrix;               
  float value;         
  float value2;          
  float value3;
  float value4;            
  int   value5;           
  int   value6;                 
  struct RPO_corners      corners[4];
};

typedef struct Output       Output_T;
typedef struct RPO_corners  RPO_corners_T;

The structure Ouput is sent to a c++ app. Therefore I need to create a bus(Ouput) which contains another bus (corners[4]). I have tried to concatenate the 4 corners buses with little success. The fact that "corners" is a vector of a struct is my problem.

When I define Output_T in the bus editor, I'm assuming that I need to specify 4 dimensions for the RP0_corners bus, rite? How can I implement that in Simulink?

Thanks in advance

Answer 1

[TAB]

To create the structure in c code you need to create non-virtual bus.

You can create 4 the non-virtual buses (RPO_corners) with the same bus object and concatenate then into an array of bus. This will create a array of structure in resulting code. You can again feed this array to another bus creator (again non-virtual) with other signals to creator to create final structure. In the Bus-Object of final bus set the size of element which is receiving bus array to 4.

See a simple example below

For more information on how create array of buses see Combine Buses into an Array of Buses.

[Jose Martinez]

Thanks a lot Tab. It worked perfectly

Answer 2

[Ryan G]

A bus of busses it possible, you can try it manually using Simulink to verify yourself. It sounds like you have a bus, Output, that contains a number of values, a Vector 3 bus, a Matrix3x3 bus and a RPO_corners bus. At least that's how I would define it for Simulink purposes here.

I believe you want to nest bus definitions. Have you tried that? If so, what are the issues?

[Jose Martinez]

thanks Ryan for the quick reply. I think the problem is that I need to use an array of C structs and I don't know how to construct the buses in Simulink. I don't have problems with vectors ( Vector3 or Matrix3x3 which in my case is a vector of 9 values). If the bus corners was a corners[1] rather than corners[4]. There won't be any problem.

Answer 3

[Jose Martinez]

Btw the error I get is something like:

Bus element 'corners' of bus object 'Output_T' is a bus, but the incoming signal is not a bus.

'Corners' is defined as bus in the bus editor with dimension 4. I was wondering if that is right.