HDL Coder Variable Size Matrix

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Caner KOREL
Caner KOREL on 17 Nov 2022
Answered: Ryan Baird on 18 Nov 2022
Hello, I'm trying to do matrix multipication in fpga. For this, I would like to convert my .m function given below.
function y=sindy_product(x1,x2)%mxn . nxk
y=zeros(1,225);%mxk
iteration=1;
coder.varsize('A',[1 1000001]);
coder.varsize('B',[1 1000001]);
for i = 1:1000001:1000001*15%n,mxn
for j =1:15%k
A=x1(i:i+1000001-1);%n
B=x2(j:15:1000001*15);%k,nxk
C=0;
for k = 1:1000001
C=C+A(k)*B(k);
end
y(iteration)=C;
iteration=iteration+1;
end
end
end
Error I get:
sindy_product_fixpt:17Error'B' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:20Error'A' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'A' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:20Error'B' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:20Error'A' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'B' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'A' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'varargin_1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'var1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'A' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:16Error'var1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'var1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'B' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:17Error'var1' : Error: variable-size matrix type is not supported for HDL code generation.sindy_product_fixpt:0ErrorMATLAB HDL Coder failed in the code generation phase. See HDL Coder conformance report.
I use matricies' row vector form because hdl coder doesnt allow to use matrix form. I think my all the variables have constant size but i still get the variable-size matrix error.

Accepted Answer

Ryan Baird
Ryan Baird on 18 Nov 2022
coder.varsize is declaring a variable size matrix:
Initializing the matrix with the zeros function may solve your issue.

More Answers (1)

Kiran Kintali
Kiran Kintali on 17 Nov 2022
Can you share your design and testbench and the project file used?
Thanks

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