Is it possible to assign arrays with different length for LUT parameters in generated code than in Simulink?

Hi,

I intend to generate C-Code out of my simulink model using Simulink Coder (ert.tlc). I wish to tune certain parameters of simulink model and for this reason, i have created simulink objects with "ImportedExternPointer" storage class.

While compiling and generating the code, the length of arrays for breakpoint and table data of a particular lookup table was 15000. I wish to tune these parameters, not just by the values, but also by the length of these arrays. I hoped that defining them as pointers would allow me to do so. However in the code, the function for lookup table looks as follows

real_T look1_bftfId_binlagpw(real_T u0, const real32_T bp0[], const real32_T
  table[], uint32_T maxIndex)

and correspondingly, the code snippet for the relevant lookup table is as below.

look1_bftfId_binlagpw
        (InputSignal->Timing.t[0], BreakpointData,
         TableData, 15000U)        

Is there a way to remove this restriction and give different sized array as inputs?

Thanks and best regards,

Karthik

Answer 1

[Nick Sarnie]

Edit: See below response

[Karthik Vemireddy]

Hi,

upon looking up the documentation again, i have found the following:

Tunable Table Size in the Generated Code

Based on it, i have chosen the following options

and then the defined the MaxIdx as dataobject.... The generated code now has :

real_T look1_bftfId_binlagpw(real_T u0, const real32_T bp0[], const real32_T
  table[], uint32_T maxIndex)

and the relevant LUT Code is as follows:

  rtb_Saturation_c = look1_bftfId_binlagpw(rtb_alpha_y, BreakpointData,
      TableData, *MaxIdx);

It had replaced the upperlimit with relevant variables at all the required places...

For the cases, that i have tested till now, it works :)

Best R'gds

Karthik