Overlay Routines in CC3200

Tal Ben Porath

I wish to implement an overlay mechanism in which routines are dynamically loaded from and to the flash, in order to save code space.

To that end, I need the ability to allocate in advance a given amount of space in a given address in the code segment (and in the data segment) and being able to rewrite it.

Is there a way to do this using "Code composer"?

over 7 years ago

0 Kobi Leibovitch over 7 years ago

TI__Guru 63006 points

Hi Tal,

You can use linker "cmd" file (in the SDK examples it is typically "cc3200v1P32.cmd") to define new memory sections (that will split the existing SRAM_CODE and SRAM_DATA sections).

Br,
Kobi

0 George Mock over 7 years ago

TI__Guru**** 249520 points

Tal Ben Porath said:
I wish to implement an overlay mechanism

For a general background on the technique, please see the section titled Copy Tables in the application note Advanced Linker Techniques for Convenient and Efficient Memory Usage. The example that comes with that application note is for C6000, but it is still worth studying.

Thanks and regards,

-George

0 Tal Ben Porath over 7 years ago in reply to George Mock

Intellectual 480 points

Hey George,

Thank you so much for the speedy reply!
This document appears to be exactly what i'm looking for. I'll read it carefully and ask again if I encounter any issues.

One small thing - the URL presented in the document, which is meant to lead to the source code, appears broken (I get a 404 error).
Could you send a correct link to this code?

Tal

0 George Mock over 7 years ago in reply to Tal Ben Porath

TI__Guru**** 249520 points

Tal Ben Porath said:
Could you send a correct link to this code?

Weird. It works for me. I attached it below.

Thanks and regards,

-George

spraa46a.zip

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Overlay Routines in CC3200