This is a fairly recent introduction - SDK 2.10 with firmware 7.2, according to viewtopic.php?f=19&t=2679&p=9781&hilit=ADL_MEM_UNINIT#p9781 But it’s actually just a macro: #define ADL_MEM_UNINIT ( _X ) _X __attribute__((section("UNINIT"))); So my question is: if I were to define that “manually” (o…

And my answer is: No. :cry: The appropriate entries appear in the map file, but variables defined with this attribute are zeroed when the unit (re)starts. So my question now is: what else is additionally required to get this to work in an SDK before v2.10 and/or firmware before R7.2 :question: …

I think it is a matter of linker section with attribute “do not initialize” (for IAR compiler). For GCC there should be another linker script options. And also you sholud know where in memory to place this section and mark your variables to put them into that section.

Yes, all that is happening - but the “persistent” data does not “persist”

I think I need to modify gcc.lkopt - but how does one do that? It seems to be automatically generated… See: viewtopic.php?f=108&t=5049

Why don’t you use OS higher than R7.2? :slight_smile:

Because the upgrade is not an option in this particular case!

I answered on how to use a custom link script. However, I’m afraid this won’t be enough… Indeed, as soon as you use Developer Studio, the generated linker script always contains the uninitialized area, even for applications built on top of “old” OS versions. It’s not only a matter of link, but al…

See https://forum.sierrawireless.com/t/whats-wrong-with-this-linker-script/4598/1 for problems with the Linker script.

Persistent RAM - ADL_MEM_UNINIT

IoT Modules Development tools

awneil August 2, 2010, 2:07pm 9

Here: How to customise gcc.lkopt ? - thanks!

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Persistent RAM - ADL_MEM_UNINIT

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