CCS/TMS320F28379D: Warning: creating output section ".scratchpad" without a SECTIONS specification

Matias Licanqueo

Part Number: TMS320F28379D

Tool/software: Code Composer Studio

Hi everyone

I'm working with a C2000 MCU. currently, i have a problem with the "CLA" module, i'm made my own code base on the example "cla_adc_fir32" (i use ePWM to periodically read the ADC, the end of conversion of the adc trigger a CLA task) but i have the problem with internal variables of the CLA. For example, if i declare a variable inside the CLA, the output doesn't take this value, and i get this warning:

"warning #10247-D: creating output section ".scratchpad" without a SECTIONS specification"

If i try to make a simple operation in the CLA, just like:

__interrupt void Cla1Task7 (void)

{

float A1, A2;

A1 = 5000;

A2 = 2000;
X = A1 + A2; //(X is a Cla1ToCpuMsgRAM Float variable)

}

The X result is 0, so, i don't know what is happening.

Any answer will be hellpfull

Thanks!

over 5 years ago

0 Lori Heustess over 5 years ago

TI__Guru* 92250 points

It means that section (.scratchpad) is not defined in the linker command file. So the linker has tossed it anywhere it finds space which may very likely not work.

Here is a good post on the subject of scratchpad

https://e2e.ti.com/support/microcontrollers/c2000/f/171/t/461859?CLA-scratchpad-new-memory-section-convention-6-4-x-with-CLA-math-library

You may also find the CLA Software Guide helpful:

https://software-dl.ti.com/C2000/docs/cla_software_dev_guide/index.html

In section 2 there is a link to the CLA workshop and the documentation for the Compiler and Assembly tools. Both of these discuss the .scratchpad section.

Regards

Lori

0 Matias Licanqueo over 5 years ago in reply to Lori Heustess

Prodigy 80 points

Hi Lori, thanks for you reply.

As you say, the problem was about not defined ".scratchpad" section.

To fix it, i wrote a symbol in: Project Properties -> C2000 Linker -> Advanced Options -> Command File Preprocessing -> --define

the symbol was "CLA_C=1"
With this, i can create variables within the CLA, and now it works

Thanks!

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CCS/TMS320F28379D: Warning: creating output section ".scratchpad" without a SECTIONS specification