deploy raspberry pi error

I followed the example to 'Send Inputs to MATLAB Function from Command Line of Raspberry Pi'

and I got an error at the last 'deploy'

how can i solve this problem?? i use 2020b

///////////////////////////////////////////////////////////////////////////////////////////////////////

function simpleSum(a,b)
%#codegen
assert(all(size(a) ==1));
assert(isa(a,'double'));
assert(all(size(b) ==1));
assert(isa(b,'double'));
c = a + b;
fprintf('%f + %f = %f\n',a,b,c);
end

////////////////////////////////////////////////////////////////////////////////////////////////////////////

>> deploy(board,'simpleSum')

------------------------------------------------------------------------

Function 'find_system' is not defined for type 'double' input arguments.

------------------------------------------------------------------------

??? Build error: C compiler produced errors. See the Build Log for further details.

More information

Code generation failed: View Error Report

[Prasanth Sunkara]

Function should not take any input arguments for deployment purpose.

Answer 1

[Kshitij Chhabra]

From my understanding, you are trying to deploy the function "simpleSum()" on a Raspberry Pi board to use it as a standalone function on the hardware. Currently MATLAB doesn't support passing of input arguments in the MATLAB function for this purpose.

For further insights, you can refer to the documentation of deploy function here.