PROCESSOR-SDK-TDAX: Convert PC based C code to Embbeded code for SoC

Hello Padmasree,

It looks like there may be a bug when using the vx_array in this way.  We will need to investigate this further on our end to ensure that this is working properly.

In the meantime, it looks like from the code that there will just be a single array element from this output, which makes it seem like a vx_scalar will work instead of a vx_array.  In that case, I would recommend using a vx_scalar instead of a vx_array.  We have several test cases using this, so this should work fine.  Please let me know if this will work with your solution.

Regards,

Lucas

Hello Lucas,

Thanks for your reply!

Please let me know the bug fixing is done. Please update here.

While I will parallely try with vx_scalar and will update here tomorrow.

Please confirm me if this is the right way to get output from scalar object.

float *output =(float*)malloc(1*sizeof(float));
vxCopyScalar(uc.median_out,(void*)output,VX_READ_ONLY,VX_MEMORY_TYPE_HOST);
printf("output from app graph is %f\n",output);

Thanks and Regards,

Padmasree N.

Hello Lucas,

I have built and compiled my C source code and added as a static library to my kernel. Is there any way that I can include my C source code directly without compiling?

If so, Please tell me how to do it.

Regards,

Padmasree N.

Hello Lucas,

I have tried with vx_scalar as you mentioned.Yet, the output shows 0.0000 in the graph.

I am using PSDK j7_07_00_00_11.

Please help me in solving the issue and also tell me a way to include the C source file directly onto the application without building and compiling as a static library.

Regards,

Padmasree N.

Hello Padmasree,

Could you please provide your full source so that I can see what is going wrong?

Regarding the including of the C source file onto the application, could you elaborate on what exactly you want to do?  I am not understanding the request.

Regards,

Lucas

Hi Lucas,

I have built and compiled my C source code (which has function definition of my Kernel) as a STATIC LIBRARY. Since larger number of Static Libs load the core and slower down, please tell me a way to include the C source code directly in my Kernel and application graph.

Regards,

Padmasree N.

Hello Lucas,

Please have a look at the above query and advice me where I am going wrong.

Hoping to get the reply soon

Regards,

Padmasree N.

Hello Lucas,

Thanks for your reply!

median_desc->data.f32 = <float value>

I did not understand in vx_median_target.c ,where I need to include the above line.

Please do throw some light on this. 

Regarding CPP building through concerto, I tried the way you mentioned and it is working.

Thanks and Regards,

Padmasree N.

Hello Lucas,

I tried the same and yet I am getting 0.0000 only as the output.

Regards,

Padmasree N.

Hi Lucas,

The issue remains the same after modifications. Please help me in resolving this.

Regards,

Padmasree N.

Hello,

Can you send a zip file of all your latest changes, including moving the cpp file to the target kernel, so that I can try on my end?

Lucas

Hi Lucas,

I am now building the same way as I have shared already by making two modifications (median_desc->data.f32) and application graph changes mentioned by you.

Regards,

Padmasree N.

Hello Lucas,

Is it working fine at your end?

Regards,

Padmasree N.

Hi Lucas,

Thanks for your reply!

I tried the same and got 1.0f from my application graph. So, it means that there's some issue with my CPP source code when passing computed output back to calling kernel.

I have checked the code and it is fine.But I dont have an idea of why this issue occurs with my CPP code.

Please verify if there is any issue with my source code.

Thanks and Regards,

Padmasree N.

Hi Padmasree,

I don't see any obvious issues with your code.  It looks like all the headers starting with "ut_*" were not included in the code you provided so that is why I wasn't able to build the source to confirm.

Regards,

Lucas

Hello Lucas,

Please find the updated code and provide me with the best solution.

Thanks in Advance! 

Regards,

Padmasree N.

Hello Padmasree,

It looks like you just commented out these includes, but that causes a compilation issue as shown below.  Can you send me the version where you have integrated this with the concerto.mak as was mentioned earlier?

/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp:6:9: error: ‘ptrdiff_t’ does not name a type
 typedef ptrdiff_t ut_Size;
         ^
/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp: In function ‘float32_t getmedian(std::vector<float>&)’:
/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp:17:19: error: ‘ut_Size’ does not name a type
             const ut_Size leftIdx = (values.size() - 1) / 2;
                   ^
/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp:18:19: error: ‘ut_Size’ does not name a type
             const ut_Size rightIdx = (values.size() - 1) / 2 + 1;
                   ^
/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp:19:30: error: ‘leftIdx’ was not declared in this scope
             median = (values[leftIdx] + values[rightIdx]) / 2.f;
                              ^
/ti/j7presi/workarea/vision_apps/kernels/cam_calib/a72/median.cpp:19:48: error: ‘rightIdx’ was not declared in this scope
             median = (values[leftIdx] + values[rightIdx]) / 2.f;

Hello Lucas,

I have built the static library only and it is succesfull without the headers as I have included the corresponding typedefs directly onto the median.cpp. 

And I request you to please try building as a static library and then include in the application graph concerto.mak file to avoid these errors.

Also, ptrdiff_t is used for pointer arithmetic and array indexing and is available under <stddef.h> 

Please try the same and let me know the issues if any.

Regards,

Padmasree N.

Hello Padmasree,

It seems like I am unable to build this.  Please send the updates we mentioned before where this file has been added to the concerto.mak and the median_demo/cam_calib/a72/ folder, otherwise, I won't be able to run this to test.

Regards,

Lucas

Hello Lucas,

Please try if this works.

It seems to work fine from my end now.

Regards,

Padmasree N.

Hello Lucas,

Thanks for your reply!

I tried modifying the kernel to 

getmedian(values_target_ptr,3,median_target_ptr);

and I am getting 

Segmentation fault(core dumped) from my application graph.

Is this all the changes or are there any changes need to be made?

Regards,

Padmasree N.

Hello Lucas,

Thanks for your reply!

It is working from my end as well..

Thanks for your time in providing the best solution!

Regards,

Padmasree N

Hi Lucas,

Please suggest me a data object to pass input of the form

ut_Vec3F32 input[3]={{0.228500 ,0.374200 ,0.000000} ,{0.112500 ,0.387800 ,0.000000} ,{0.041200 ,0.363200 ,0.000000} };

where,

typedef struct

{ float data[3];

}ut_Vec3F32;

Also I am facing the same issue output=0.0000 with array object. Please verify if the below lines for kernel call is right or do I need to make any modifications?

{
vx_array temp,temp1;

rotationaxisandangle_desc->num_items = 8;

ut_solvePnP(objectpoints_target_ptr,imagepoints_target_ptr,npoints_target_ptr,&cameramatrix_target_ptr,distcoeffs_target_ptr,
ndistcoeffs_target_ptr,&temp,&temp1,memorysolvepnp_target_ptr);

}

where temp and temp1 contains the output. How do I assign the values stored in them to display in my graph?

Regards,

Padmasree N.

Hello Padmasree,

Since we were able to resolve your previous issues, can you start a new forum thread for these issues?  I want to be sure that each question is answered appropriately.

Regards,

Lucas

Hello Lucas,

Please follow the below link for a new thread.

https://e2e.ti.com/support/processors/f/processors-forum/990154/processor-sdk-tdax-developing-custom-application-in-psdk-using-vision-apps-and-pytiovx

Regards,

Padmasree N.

Hello Lucas, 

Any updates on the above thread?

Hoping for a sooner reply

Regards,

Padmasree N.

Hello Lucas, 

Any updates on the below thread?

https://e2e.ti.com/support/processors/f/processors-forum/990154/processor-sdk-tdax-developing-custom-application-in-psdk-using-vision-apps-and-pytiovx

Hoping for a sooner reply 

Regards,

Padmasree N.

Hello Lucas,

Any updates on the thread?

Regards,

Padmasree N.