MPU Fault in Bluetooth: HCI Power Control

RE: MPU Fault in Bluetooth: HCI Power Control

AMarch01 — Thu, 12 Dec 2024 22:02:48 GMT

I know this is old, but in case someone runs across this while looking for a problem in hci_pwr_ctrl application.
I wanted to add that this code has given me an issue in nrfConnect 2.7.0. The target was an nrf52840. The program would seem to operate correctly but would memfault if I hit "connect" in the nrf Connect phone application.

This problem was resolved when I added:

CONFIG_BT_LL_SW_SPLIT=y

to the prj.conf file.

RE: MPU Fault in Bluetooth: HCI Power Control

Susheel Nuguru — Tue, 08 Dec 2020 08:46:30 GMT

Sorry, 640 was wrong, I actually changed it to 1024. The actual needed size might be something between 800-1024 and you can fine-tune this value later after some tests.

I am pretty sure that CONFIG_MAIN_STACK_SIZE should be an available and configurable value in the zephyr latest master.

RE: MPU Fault in Bluetooth: HCI Power Control

vasilje — Fri, 04 Dec 2020 17:32:20 GMT

Hey, I am not sure why, but it didnt work. Maybe you are in another commit, because I couldnt find CONFIG_MAIN_STACK_SIZE set for nrf52840dk_nrf52840, as well as for the hci_pwr_ctrl project. I tried setting it up to 640 in hci_pwr_ctrl project in prj.conf, as well as in nrf52840dk_nrf52840_defconfig. Still getting the same error.

RE: MPU Fault in Bluetooth: HCI Power Control

Susheel Nuguru — Fri, 04 Dec 2020 14:46:07 GMT

Hi Vasilije,

Not sure why I did not reproduce this in the first test.

But there seems to be an issue with the main stack size.

Increasing the CONFIG_MAIN_STACK_SIZE from 320 to 640 seems to fix this issue.

I created an internal ticket to follow this up for the next release. Thanks for letting us know.

RE: MPU Fault in Bluetooth: HCI Power Control

Susheel Nuguru — Thu, 03 Dec 2020 14:08:43 GMT

Vasilije,

I have reproduced it, and the memfault seems to happen quite early in the boot up process. I have looking in it for more explanation, and i will come back to you when i have some more info on this.

RE: MPU Fault in Bluetooth: HCI Power Control

vasilje — Wed, 02 Dec 2020 14:01:36 GMT

Hi,

This is the last commit from the zephyr tree in the ncs workspace:

commit 746d14a3380fb6807afed61c4c024485ae8212f9 (HEAD, manifest-rev)
Author: Joakim Andersson <joakim.andersson@nordicsemi.no>

Keep in mind that this mistake happens when trying to build this project when building from the `ncs/zephyr` directory

RE: MPU Fault in Bluetooth: HCI Power Control

Susheel Nuguru — Tue, 01 Dec 2020 07:37:59 GMT

Sorry for the late reply.

I just tried to run this on latest master compiling on windows. but did not see this error.

Could you please give me the commit number and your compiler versions so that i can tune into them.

I will first try those exact versions on windows and on Ubuntu virtual machine later