HDL Coder Variable Size Matrix

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Caner KOREL
Caner KOREL 2022-11-17
评论： Hau 2025-2-13
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.

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采纳的回答

Ryan Baird
Ryan Baird 2022-11-18
coder.varsize is declaring a variable size matrix:
https://www.mathworks.com/help/coder/ref/coder.varsize.html
Initializing the matrix with the zeros function may solve your issue.
  1 个评论
Hau
Hau 2025-2-13
I have read the problem and read the proposal solution and i write this code but i still have the same problem. Can i have some ideas ?
function out = test(in, n, intrlv)
% Define the maximum possible input length (adjust to your needs)
max_len = 100;
% Pre-allocate output array with a fixed size
out = zeros(1, max_len);
% Calculate the block size
bl_n = n * intrlv;
% Calculate the maximum number of blocks (fixed size)
max_blocks = max_len / bl_n;
% Loop through each block with fixed indexing
for b = 1:max_blocks
% Calculate the index range (fixed)
idx_start = (b-1) * bl_n + 1;
idx_end = b * bl_n;
% Ensure indices are within the input length
if idx_end <= length(in)
% Copy the block to the output
out(idx_start:idx_end) = in(idx_start:idx_end);
end
end
end

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更多回答（1 个）

Kiran Kintali
Kiran Kintali 2022-11-17
Can you share your design and testbench and the project file used?
Thanks

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