CC2640R2F: Can reduce the stack or memory size to run aoa project which integrate with bmi160 sensor?

Michelle Lu

Part Number: CC2640R2F

Hi,

Software: SDK v2.3

I follow the document ( http://dev.ti.com/tirex/content/sail_1_20_00_02/examples/rtos/CC1310_LAUNCHXL/sail/i2cbmi160/README.htmlto porting SAIL plug with bmi160 sensor on the aoa sender project.

On the main.c, there are two task.

1. AoASender_createTask();

2. sailThread_create(); => handle bmi160 sensor driver.

But I can't leave both of two task or the device will crash. I guess it is because the ram size. How can I let both two tasks work at the same time? How to reduce the stack size?

Thanks

over 5 years ago

0 J Lindh over 5 years ago

TI__Guru 57865 points

Hi Michelle,
I believe you will find the user guide chapters useful;

dev.ti.com/.../creating-a-custom-bluetooth-low-energy-application.html

dev.ti.com/.../debugging-index.html

0 Michelle Lu over 5 years ago in reply to J Lindh

Prodigy 230 points

Can we increase the stack size from SRAM?

And where is the value be setting?

0 Aslak N. over 5 years ago in reply to Michelle Lu

TI__Mastermind 23440 points

Hi Michelle,

If you can, try to integrate the sensor functionality in the existing task. I can't see that the two extra tasks (sensor and display in the SAIL example) are actually required. Unfortunately each task needs quite a bit of stack, so as much as possible I'd recommend combining tasks.

As you may be aware the BLE stack is dependent on Heap (which is normally automatically whatever is left of RAM), so a few kilobytes is used for this. See more about heap in the User's Guide: http://dev.ti.com/tirex/#/?link=Software%2FSimpleLink%20CC2640R2%20SDK%2FDocuments%2FBLE-Stack%2FBLE-Stack%20User's%20Guide

The .stack segment seems to be the 'Program.stack' setting in the .cfg file (in the file imported in the cfg file) which is the Hwi/pre-BIOS stack. I'm not entirely sure why this is set to 1024, but you can try reducing it by adding Program.stack = 512; at the bottom of the cfg file. You can see the utilization/peak usage by using RTOS Object View -> Hwi -> Module.

Best regards,
Aslak

Bluetooth®︎

Bluetooth forum

CC2640R2F: Can reduce the stack or memory size to run aoa project which integrate with bmi160 sensor?