IWR6843: 3D people counting demo: free up memory for new task.

Peter A

Part Number: IWR6843

Hi,
I am trying to update the 3D People Counting demo to include an SPI task. However this causes a crash when I try to allocate memory.
I have added the following to initialise the SPI task (around line 2430):

Task_Params_init(&taskParams);
taskParams.priority = SPI_TASK_PRIORITY; 
taskParams.stackSize = 6*1024;
Task_create(spi_msg_task, &taskParams, NULL);

The SPI initialises correctly using SPI_init(), however it crashes when memory is being allocated for the point clouds (around line 1240):

pointCloudSize                         =  MAX_RESOLVED_OBJECTS_PER_FRAME * sizeof(DPIF_PointCloudSpherical);
gMmwMssMCB.pointCloudFromDSP           =  (DPIF_PointCloudSpherical *)MemoryP_ctrlAlloc(pointCloudSize, sizeof(float));

Do you have a suggestion of how to update the memory allocations for the point cloud, so that I can get this to run? (Note: this works with the Sense & Direct demo).

Note: This is a question from my colleague, but they cant post because of the changes to company emails (although they are using the same company domain). Is there someone we can contact to sort this out?

over 4 years ago

0 Khalid Rajab over 4 years ago

Intellectual 262 points

Hi,

This question came from me but I can't seem to post a new question myself.

0 Khalid Rajab over 4 years ago in reply to Khalid Rajab

Intellectual 262 points

Hi, any chance of getting a response for this? Or is any further clarification required?

0 Vaibhav Mahimkar over 4 years ago in reply to Khalid Rajab

TI__Mastermind 23725 points

Hello Khalid,

We apologize for the delayed response. Your own replies to thread made it not appear on the filter we have.

Allow us to get back to this.

Are you looking to free up code space or data space. Wonder if you have modified the code wrt to the demo we have on TIrex.

Thank you,

Vaibhav

0 Nitin Sakhuja over 4 years ago in reply to Vaibhav Mahimkar

TI__Mastermind 30405 points

Hi Khalid,

Please refer to the following discussion and the resources given here to learn about memory allocation and placement techniques:

CCS/IWR6843ISK: Optimization for memory size

As noted there, I would suggest you to start with understanding what section is running out of memory and then trying to figure out any trade-offs possible to contain the extra memory requirement for the added code and/or data.

Please make sure to go through the advanced linker command techniques document as the people counting demo uses memory overlays.

Thanks

-Nitin

0 Khalid Rajab over 4 years ago in reply to Vaibhav Mahimkar

Intellectual 262 points

Hi Vaibhav,

That's certainly understandable that the multiple replies would have confused your filters.

In the end, we spoke with the local TI staff and they were extremely helpful in getting us a solution. It ended up being quite straightforward.

In point3D_mss.cfg:

heapMemParams.size          = 130*1024;

The L2 heap size could be increased (I had difficulty finding it before).

Posting it here for anyone else's benefit. I still need to do some optimisation (using Nitin's suggestions), but that largely solves the issue.

0 Khalid Rajab over 4 years ago in reply to Nitin Sakhuja

Intellectual 262 points

Hi Nitin,

Thanks, that's exactly what I was looking for!

Best regards,

Khalid

Sensors

Sensors forum

IWR6843: 3D people counting demo: free up memory for new task.