AM2432: Controlling linker placement of gHwiCtrl

Johannes von Löwis

Part Number: AM2432

In our project for AM2432 (with Free-RTOS) and motor control sdk 09_02_00_12 I wish to control where the linker places objects like gHwiCtrl (from HwiP_armv7r_vim.obj).

At the moment it ends up in DDR RAM. Map file:

.bss 0 82800000 00005ef0 UNINITIALIZED
82800000 00001008 (.common:gHwiCtrl)

I'd appreciate any help in finding the linker command file entries that put it in a different memory region, e.g. R5F_TCMB0.

Best regards

Johannes

4 months ago

0 Tushar Thakur 4 months ago

TI__Guru 65658 points

Hi Johannes,

You can do so using the memory configurator tool provided as a part of SDK. To know more on memory configurator tool, please refer MEMORY_CONFIGURATOR

Regards,

Tushar

0 Johannes von Löwis 4 months ago in reply to Tushar Thakur

Expert 1836 points

From the documentation that you have linked in your answer I can't see how I would use MEMORY_CONFIGURATOR to affect the placement of an object (gHwiCtrl) that is defined in a library (freertos.am243x.r5f.ti-arm-clang.release.lib, apparently without explicit section assignment).

Could you please elaborate on this?

+1 Tushar Thakur 4 months ago in reply to Johannes von Löwis

TI__Guru 65658 points

Hi Johannes,

Open the example.syscfg file and add memory region in memory configuration section. Please refer below image.

Now, go to the sections part and add a new section defining the memory where global variable needs to be stored. I am using the above configured memory for example.

Now, recompile the example symbols will be relocated to new memory region.

Regards,

Tushar

0 Johannes von Löwis 4 months ago in reply to Tushar Thakur

Expert 1836 points

Thank you Tushar,

finding the right section name was my problem. This entry in the linker command file did the trick:

    GROUP {
       .bss:.common:gHwiCtrl : palign(8)
    } > R5F_TCMB0

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AM2432: Controlling linker placement of gHwiCtrl