CC2652R: Simple Peripheral Project Linker Command File

Andrew Larson

Part Number: CC2652R

Hello,

I am using CCS Version 10.1.0, XDCTools version 3.61.01.25, Simplelink SDK Version 4.20.00.35, and am compiling my project with TI v20.2.1.LTS. My OS is 64-bit Windows 10. My target device is CC2652R1F. I am programming it via the JTAG interface on the Launchpad.

In developing my Bluetooth application, I have been reviewing the Linker Command File for the Simple Peripheral example project. I noticed a couple input/output sections that I have not been able to find any documentation on. These include ".constdata", ".rodata", and ".emb_text". I have already reviewed the ARM Assembly Language Tools User's Guide, ARM Optimizing C/C++ Compiler User's Guide, and the ARM Compiler User's Guide without any luck. Are these sections created in one of the BLE stack libraries or are they entirely unnecessary? I am worried that not allocating them in my linker command file might cause arcane errors to be thrown by the stack.

Thank you for the assistance.

over 3 years ago

0 Elin W over 3 years ago

TI__Genius 14845 points

Hi Andrew,

Assigning an expert to comment.

Thanks,
Elin

0 Alec May over 3 years ago

TI__Genius 17265 points

Hi Andrew,

After doing some research, I don't believe any of these sections are TI-specific or BLE-specific. ".constdata" and ".rodata" both seem to be used for storing constants. ".emb_text" appears to be used to store specific assembly instructions.

There is a small amount of information about ".constdata" in the arm compiler documentation here: (also mentions RO data)
https://developer.arm.com/documentation/dui0151/a/using-scatter-loading-description-files/examples-of-specifying-region-and-section-addresses/placing-regions-at-fixed-addresses

There is some information about ".rodata" in this TI linker presentation:
https://e2e.ti.com/cfs-file/__key/communityserver-discussions-components-files/166/A-Primer-on-Linker-Scripts-and-Command-Files.pdf

There is a small amount of information in the arm compiler documentation about ".emb_text" here:
https://developer.arm.com/documentation/dui0472/c/using-the-inline-and-embedded-assemblers-of-the-arm-compiler/compiler-generation-of-embedded-assembly-language-functions

I hope this helps.

Best Regards,
Alec M

Bluetooth®︎

Bluetooth forum

CC2652R: Simple Peripheral Project Linker Command File