Error: K must be numeric, scalar, real, integer-valued, and greater than or equal to zero in bitsra(A,K)

Hello There,

I'm working at a very long program, and I'm trying to converting (.m) code to VHDL code, but I got the following error.

The Matlab created the following function to divide the (fi) values.

Can you please help me to fix this error ?

Error: 
??? K must be numeric, scalar, real, integer-valued, and greater than or equal to zero in bitsra(A,K).

Genrated Code from Matlab:

 function y = fi_div_by_shift(a,shift_len)
    coder.inline( 'always' );
    if isfi( a )
        nt = numerictype( a );
        fm = fimath( a );
        nt_bs = numerictype( nt.Signed, nt.WordLength + shift_len, nt.FractionLength + shift_len );
        y = bitsra( fi( a, nt_bs, fm ), shift_len );
    else
        y = a/2^shift_len;
    end
 end

Answer 1

[Walter Roberson]

At the command line command

   dbstop if error

and run the code. When it stops with the error, if necessary command

dbup

one or more times until you are examining this file. Request

class(shift_len), shift_len

and show us the results. Then use dbup once more and show us the line of code that is calling the routine.

[Tamer]

the error at this line, although I wrote the code as below

original Code:

for op=1:1:le
   b2(op)=in_2(op).*2; 
end

Note: in_2(op) is fi 1x1000000

b2(op) is fi 1x1000000

matlab generated code:

 for op=1:1:le
     b2(op)=fi_div_by_shift(in_2(op), -1);
 end