TDA4VM: TDA4VM

jack he

Part Number: TDA4VM

I want to know the way to change the reserved DDR memory of TDA4VM in QNX+RTOS mode.

I think there may be some modifications on the linker.cmd of MCU and also the .build file of the QNX.

But, what are tht important tips about how to modify the layout of DDR? What is the step after the modification? How to excute?

Could anyone give me some help,, it is better that giving some related document.

Thank you!

Best Regard

over 1 year ago

0 KB over 1 year ago

TI__Guru* 94141 points

Hi,

Please have a look at the below SDK 8.2 links for modifying memory maps. Similar content is available in SDK 7.1

PSDK QNX:

9.3. How To Take Care Of Remote Core Memory Map Updates — Processor SDK QNX J721E (ti.com)

PSDK RTOS:

8.9. Understanding and updating SDK memory map for J721E — Processor SDK RTOS J721E

The Vision Apps framework produces a file to show system memory layout, if vision_apps is in use, see
.../vision_apps/platform/j721e/rtos/system_memory_map.html

Regards,

0 jack he over 1 year ago in reply to KB

Prodigy 70 points

Hi, KB

This the Vision Apps framwork is used, there is a large region DDR memory, named DDR_SHARED_MEM, which is 512MB. I want to know if this region can be reduce, or remove?

Thanks,

Best Regard

0 Nikhil Dasan over 1 year ago in reply to jack he

TI__Guru 57670 points

Hi,

This region is required as this is the memory for shared memory buffers in DDR.
This memory region is where OpenVX buffers are allocated from, so this region cannot be removed.
It can be reduced but it will depend on the amount of memory you are using in your OpenVX-based applications.

Regards,
Nikhil

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TDA4VM: TDA4VM