Errors when using HDL coder

Question

Xiaotong 2025-11-24，6:32

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2181435-errors-when-using-hdl-coder

评论： Xiaotong 2025-11-26，1:28

Hallo, when i was using hdl coder for my project, and I keep getting this issue:

Exception in thread "AWT-EventQueue-0": java.lang.NullPointerException

at com.mathworks.toolbox.coder.model.MetadataTree.getFunctionNode(MetadataTree.java:59)

at com.mathworks.toolbox.coder.model.MetadataTree.getNode(MetadataTree.java:44)

at com.mathworks.toolbox.coder.model.MetadataTree.put(MetadataTree.java:27)

at com.mathworks.toolbox.coder.mi.ConversionUtils.convertRangesAndTypes(ConversionUtils.java:562)

at com.mathworks.toolbox.coder.mi.ConversionUtils.convertRangesAndTypes(ConversionUtils.java:500)

at com.mathworks.toolbox.coder.fixedpoint.FixedPointController.handleSimulationResults(FixedPointController.java:690)

at com.mathworks.toolbox.coder.fixedpoint.FixedPointController.access$1100(FixedPointController.java:71)

at com.mathworks.toolbox.coder.fixedpoint.FixedPointController$11.handleResult(FixedPointController.java:506)

at com.mathworks.toolbox.coder.mi.FevalCommand$1.run(FevalCommand.java:119)

at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)

at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)

at java.awt.EventQueue.access$500(EventQueue.java:97)

at java.awt.EventQueue$3.run(EventQueue.java:709)

at java.awt.EventQueue$3.run(EventQueue.java:703)

at java.security.AccessController.doPrivileged(Native Method)

at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)

at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)

at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)

at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)

at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)

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Xiaotong 2025-11-25，1:22

编辑：Xiaotong 2025-11-25，1:24

Hi, I tried this code in hdlcoder in both Matlab and simulink, and the issue appeared:

function [out,out_valid ] = Interleave3 (in, in_valid, in_start, in_final, iBIL)

persistent T v v_valid i j k in_buffer E STARTED READY1 READY2 out_buffer

if isempty(v)

T = uint16(0);

v = false(1,2025); %% 45*45

v_valid = false(1,2025);

i = uint16(0);

j = uint16(0);

k = uint16(0);

E = uint16(0);

STARTED = false;

in_buffer = false(1,1024);

READY1 = false;

READY2 = false;

out_buffer = false(1,1024);

end

T = uint16(ceil((cordicsqrt(1 + bitsll(E,3))-1) / 2 ));

out = false;

out_valid = false;

if in_start

T = uint16(0);

v = false(1,2025); %% 45*45

v_valid = false(1,2025);

i = uint16(0);

j = uint16(0);

k = uint16(0);

E = uint16(0);

STARTED = true;

in_buffer = false(1,1024);

READY1 = false;

READY2 = false;

out_buffer = false(1,1024);

end

if in_valid && STARTED

E = E+1;

in_buffer(E) = in;

end

if in_final && STARTED

READY1 = true;

STARTED = false;

end

if READY1

if i<=T

%coder.unroll();

%for q = 1:16

if j<T-i

if k<E

v(i+45*j+1) = in_buffer(k+1);

v_valid(i+45*j+1) = true;

end

k = k+1;

j = j+1;

end

if j<T-i

if k<E

v(i+45*j+1) = in_buffer(k+1);

v_valid(i+45*j+1) = true;

end

k = k+1;

j = j+1;

end

if j<T-i

if k<E

v(i+45*j+1) = in_buffer(k+1);

v_valid(i+45*j+1) = true;

end

k = k+1;

j = j+1;

end

if j<T-i

if k<E

v(i+45*j+1) = in_buffer(k+1);

v_valid(i+45*j+1) = true;

end

k = k+1;

j = j+1;

end

%end

if j == T-i

j = uint16(0);

i = i+1;

end

else

READY1 = false;

READY2 = true;

k = uint16(0);

i = uint16(0);

j = uint16(0);

end

if READY2

if j<=T

%coder.unroll();

%for q = 1:16

if i<T-j

out_buffer(k+1)= v(i+45*j+1) && v_valid(i+45*j+1) ;

k = k+1*uint16(v_valid(i+45*j+1));

i = i+1;

end

if i<T-j

out_buffer(k+1)= v(i+45*j+1) && v_valid(i+45*j+1) ;

k = k+1*uint16(v_valid(i+45*j+1));

i = i+1;

end

if i<T-j

out_buffer(k+1)= v(i+45*j+1) && v_valid(i+45*j+1) ;

k = k+1*uint16(v_valid(i+45*j+1));

i = i+1;

end

if i<T-j

out_buffer(k+1)= v(i+45*j+1) && v_valid(i+45*j+1) ;

k = k+1*uint16(v_valid(i+45*j+1));

i = i+1;

end

%end

if j == T

k = uint16(0);

end

if j == T-i

i = uint16(0);

j = j+1;

end

else

out_valid = true;

k = k+1;

out = out_buffer(k);

if k == E

READY2 = false;

end

Abhijeet 2025-11-25，11:54

Hello @Xiaotong,

Thanks for sharing your script. It appears the issue takes place within the "Fixed Point Conversion" step when you supply it with your test bench script. If you have supplied your own "Simulation Ranges" and "Proposed Types" please share that with us as well along with your test bench script. This will help us reproduce the issue and work on a fix.

Thanks.

Xiaotong 2025-11-26，1:28