Uninitialized section - linker settings

Vaclav Cechticky

Other Parts Discussed in Thread: RM48L952

Hello,

I'd like to put some variables into an uninitialized memory section. How shall I configure the linker? I'm using CCS 5.1.0.09 with compiler version 4.9.1.

Thank you

Vaclav

over 13 years ago

0 Christian Herget over 13 years ago

TI__Expert 6985 points

Vaclav,

This feature of the linker is described on Page 217 in SPNU118J.

In gerneral the following should work:

C File:

...
#pragma DATA_SECTION(some_struct, ".no_init_ram_sect");
struct
{
unsigned a;
unsigned b;
} some_struct;
...

The pragma DATA_SECTION is described on Page 92 in SPNU151.

Linker Command File:

...
SECTIONS
{
    ...
    .no_init_ram_sect : {} type=NOINIT > RAM
    ...
}
...

Best Regards,

Christian

0 Roger Périat over 12 years ago in reply to Christian Herget

Expert 2040 points

Hello,

Was there any modification in behavior of the build tools between 5.0.3 and 5.0.4?

Following the above instructions this works well for 4.9.7 and 5.0.1, 5.0.2, 5.0.3.

With 5.0.4 it seems, that the NOINIT is ignored, and the variables in the .no_init_ram_sect are initialized too.

Does anybody observe the same, do I miss a new setting?

Working with CCS 5.3.0, for RM48L952

Thank you for every hint!

Roger

Edit: Perhaps this one has en effect on this?: SDSCM00045211 found in DefectHistory.txt of 5.0.4.

0 SteveR35416 over 12 years ago in reply to Roger Périat

TI__Prodigy 660 points

Roger,

The v5.0.4 tools do have a bug that causes NOINIT to be ignored. You are correct that the changes made for SDSCM00045211 are the cause of the bug. There is a new bug for this problem, SDSCM00046848.

Apologies,

Steve

Code Generation Tools Support Team

0 Roger Périat over 12 years ago in reply to SteveR35416

Expert 2040 points

Thank you Steve for yor reply. So we will stay at 5.0.3 for now.

Roger

0 Gareth Price over 12 years ago in reply to SteveR35416

Prodigy 180 points

Will this bug be fixed in v5.1.0?

0 SteveR35416 over 12 years ago in reply to Gareth Price

TI__Prodigy 660 points

Yes, the bug will be fixed in 5.1.0.

Regards,

Steve

0 Gareth Price over 12 years ago in reply to SteveR35416

Prodigy 180 points

Excellent... I am actually using 5.1.0.B1 at the moment and the bug is still there.

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Uninitialized section - linker settings