CC2642R: param limit for multi_role

Simon Huo

Part Number: CC2642R

Hi engineers,

My customer is using 2 adv (interval = 200m) and a scan with 40ms interval and 40ms window. Now we found in Ellisys log sometimes one adv seem to be missing for a while. please find as below graph. The yellow mark is for normal behavior and red circle for issue.

Is there a limit in param setting if I want to use 2 adv and scan at the same time?

over 1 year ago

0 Clément over 1 year ago

TI__Guru** 100770 points

Hi Simon,

The CC2642R has only one radio that can be either receiving or transmitting at the time.

When enabling several Bluetooth operations (advertising, scanning, connection), the scheduler has to decides which operation to execute and may have to drop others.

I would recommend the following resources:

- Enable the RF observables so you can see the radio activity (https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_6_40_00_13/docs/ble5stack/ble_user_guide/html/ble-stack-5.x-guide/debugging-index.html#debugging-rf-output)

- Read more about the Link Layer (LL) and the possibilities to prioritize certain operations (https://dev.ti.com/tirex/content/simplelink_cc13xx_cc26xx_sdk_6_40_00_13/docs/ble5stack/ble_user_guide/html/ble-stack-common/link-layer-cc13xx_cc26xx.html#link-layer-ll)

I hope this will help,

Best regards,

Because of the holidays, TI E2E™ design support forum responses will be delayed from Dec. 25 through Jan. 2. Thank you for your patience.

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CC2642R: param limit for multi_role