Unable to read .bin data from Jetson

I am try to run a matched Filter function on jetson, using the 'exe' library, but there is no data inside the .bin file that i have generated.

here is the matched filter fucntion

function matched_filter1 = matched_Filter_GPU(rx_signal_noisy, matched_filter) %#codegen
    coder.gpu.kernelfun;
    
    rx_signal_noisy = single(rx_signal_noisy);
    matched_filter  = single(matched_filter);
    rx_signal_noisy = reshape(rx_signal_noisy, 1000, 100);
    matched_filter1 = zeros(size(rx_signal_noisy));
    matched_filter1 = conv2(rx_signal_noisy, matched_filter(:), 'same');
end

here is the wrapper function

function matched_Filter_wrapper(rx_signal_noisy, matched_filter) %#codegen
    mf_output = matched_Filter_GPU(rx_signal_noisy, matched_filter);
    fid = fopen('output_new.bin', 'wb');
    tmp = single(real(mf_output(:))); 
    count = fwrite(fid, tmp, 'single')                   
    fclose(fid);
end

here is the MATLAB code

clear
S = load('rx_signal_noisy.mat');   
rx_signal_noisy = single(struct2array(S));

S = load('MF_coeff.mat');
MF_coeff = single(struct2array(S));


hwObj = jetson('169.254.172.219','hr','0000');
rx_signal_noisy_T = coder.typeof(rx_signal_noisy, [1 100000], [1 1]);
matched_filter_T  = coder.typeof(MF_coeff, [1 100], [0 0]);

cfg = coder.gpuConfig('exe');
cfg.Hardware = coder.Hardware('NVIDIA Jetson');
cfg.GenerateReport = false;
cfg.VerificationMode = 'None';
cfg.CodeExecutionProfiling = false;
cfg.GenerateExampleMain = 'GenerateCodeAndCompile';
cfg.Hardware.BuildDir = '~/remoteBuildDir';
codegen('-config', cfg, 'matched_Filter_wrapper', '-args', {rx_signal_noisy_T, matched_filter_T})
putFile(hwObj, 'matched_Filter_wrapper.elf')
runApplication(hwObj, './matched_Filter_wrapper.elf');

getFile(hwObj, '~/remoteBuildDir/MATLAB_ws/R2024a/D/Drive_Data/Radar/Radar/output_new.bin')
fid = fopen('output_new.bin','rb');
n  = prod(sz);
data = fread(fid, n, 'single'); fclose(fid);

the output of n = 1x2 double and the output of the data = 0x0 empty. kindly guide me throigh the process, it will be a great help. thankyou in advance

[dpb]

Be tough without the hardware, methinks, but...

Can you first <successfully run the example?>

You'll have to at least show folks what did happen for anybody to even hazard a guess...

[Syed Muhammad]

Thankyou for your response, yeah i have tried the example, it runs properly, but the main.cu and main.h is custom generated right? not using the codegen or gpucoder app?

[dpb]

Just checking that you could get to and run on the particular device first before diving deeper.

I don't have the needed TB's so can't play in depth, sorry.

But, you've not shown any of the results of the compilation etc. to give anybody any klew as to what might possibly be a problem...

Have you looked at the generated code and compared its structure to the example main?

[dpb]

codegen -config cfg matched_Filter_wrapper -args {rx_signal_noisy_T, matched_filter_T, NsampPRI_T, Npulses_T}

Looks to me like the argument list is going to be just text, not the actual data since you used command, not function form.

codegen('-config', cfg, 'matched_Filter_wrapper', '-args', {rx_signal_noisy_T, matched_filter_T, NsampPRI_T, Npulses_T})

I'm not positive about the use of the cell array versus individual arguments; but looks to me like your code is expecting individual arguments rather than a cell array.

[Syed Muhammad]

Thankyou for the resposne again i have updated the functiona and also the codegen coammadn that you shared i have attached the output, kindly i have updated my question

Answer 1

[dpb]

Let's debug your code in MATLAB, first...

function matched_Filter_wrapper(rx_signal_noisy, matched_filter) %#codegen
    mf_output = matched_Filter_GPU(rx_signal_noisy, matched_filter);
    fid = fopen('output_new.bin', 'wb');
    tmp = single(real(mf_output(:))); 
    count = fwrite(fid, tmp, 'single');                   
    fclose(fid);
end

function matched_filter1 = matched_Filter_GPU(rx_signal_noisy, matched_filter)
    rx_signal_noisy = single(rx_signal_noisy);
    matched_filter  = single(matched_filter);
    rx_signal_noisy = reshape(rx_signal_noisy, 1000, 100);
    matched_filter1 = zeros(size(rx_signal_noisy));
    matched_filter1 = conv2(rx_signal_noisy, matched_filter(:), 'same');
end

s_n =rand(1000*100,1);
f=rand(100,2);
matched_Filter_wrapper({s_n,f})

Not enough input arguments.

Error in solution>matched_Filter_wrapper (line 2)
mf_output = matched_Filter_GPU(rx_signal_noisy, matched_filter);
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

As noted, this doesn't work to pass arguments as a cell array. In MATLAB at the command line you get the error message that something went wrong; when try to run on the GPU, no such interface so you have to get it right or have some other way to handle errors.

The syntax

matched_Filter_wrapper(s_n,f)

does run.

NOTA BENE; the line

 rx_signal_noisy = reshape(rx_signal_noisy, 1000, 100);

makes the code dependent upon the input signal always being identically 100000 elements so it will also fail for any other length signal.