TMS320F280049C: Link Command Primer

TI-CSC

Genius 9600 points

Part Number: TMS320F280049C

Hello E2E Experts,

Good day.

I have an excellent article "TI Linker Command Primer"

This answered most of my questions and I can now link the project again.

I do have one more question that does not seem to be covered by the article.

1) I'm trying to determine what part of RAM the heap is being allocated to. How can I determine this?

2) I also don't have a sense of an appropriate size for the heap, any guidelines on heap size?

A bit more info,

In the primer they do list sysmem as for the malloc heap.

In my linker file I have: .esysmem : > RAMLS5, PAGE = 1,

In Properties | C2000 Linker | Basic Options, I had to reduce the Heap size (I think it was either 0x300 or 0x400 originally) down to 0x170 or I get linker errors . I tried: .esysmem : > RAMLS5 | RAMLS6, PAGE = 1,
however this did not seem to make any difference.

Thank you in advance for your support.

Regards,

CSC

over 1 year ago

0 Veena Kamath over 1 year ago

TI__Mastermind 31525 points

TI-CSC said:
1) I'm trying to determine what part of RAM the heap is being allocated to. How can I determine this?

The heap section is named .sysmem in EABI and .esysmem in COFF

TI-CSC said:
. I tried: .esysmem : > RAMLS5 | RAMLS6, PAGE = 1,

The usage of > LS5 | LS means the section is either allocated to LS5 or LS6. You may use >> LS5|LS6, which will make the linker split and place it in both LS5 and 6. But heap us a section which cannot be split. You can combine LS5 and 6 into a larger memoryblock and use that for heap

Regards,

Veena

0 TI-CSC over 1 year ago in reply to Veena Kamath

TI__Genius 9600 points

Hello Veena,

Good day.

How does one determine a suitable heap size? What is considered too small?

Thank you in advance.

Regards,

CSC

0 Veena Kamath over 1 year ago in reply to TI-CSC

TI__Mastermind 31525 points

Hi,

That is up to the application requirement, how much memory is allocated at runtime

One method is to configure a large amount of memory as heap, run the application and check how much is actually being used.

Regards,

Veena

0 TI-CSC over 1 year ago in reply to Veena Kamath

TI__Genius 9600 points

Hello Veena,

Good day.

How would I determine how much of the heap is being used during runtime?

Regards,

CSC

+1 Veena Kamath over 1 year ago in reply to TI-CSC

TI__Mastermind 31525 points

One option is to fil the memory with a known pattern, run the application and check how much memory has been changed at runtime.

For stacks, you may also use the Stack Usage view in the CCS

Regards,

Veena

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TMS320F280049C: Link Command Primer