Re: MPU fault while testing Bluetooth Mesh Sample demos


Chettimada, Vinayak Kariappa
 

Are you still receiving MPU Fault? I have solved someone's similar problem., and had a question if you are using GATT API and by any chance the control flows through bt_att_req_send function?

-Vinayak

-----Original Message-----
From: <devel@lists.zephyrproject.org> on behalf of Jiří Kubias <jiri.kubias@gmail.com>
Date: Tuesday, 18 September 2018 at 8:07 AM
To: vikrant8051 <vikrant8051@gmail.com>
Cc: Carles Cufi <Carles.Cufi@nordicsemi.no>, "devel@lists.zephyrproject.org" <devel@lists.zephyrproject.org>, "users@lists.zephyrproject.org" <users@lists.zephyrproject.org>
Subject: Re: [Zephyr-devel] MPU fault while testing Bluetooth Mesh Sample demos

Hi,
last night I have discovered that I have messed up variables and I have tried to assign value to constant variable -> that is the reason why I have received the MPU fault.


Best regards,
Jiri


po 17. 9. 2018 v 16:29 odesílatel Jiří Kubias <jiri.kubias@gmail.com> napsal:


Hi,
In my case the MPU falut was stable. But in your case it looks like some race condition issue.


Try to reorganise the initialisation or add some delays.


Regards Jiri




Dne po 17. 9. 2018 15:39 uživatel Vikrant More <vikrant8051@gmail.com> napsal:


Hi Jiri,
After replying to your email, I once again started testing thoroughly.
And yes, once again I got MPU fault.


Regards,
Vikrant



On Mon, Sep 17, 2018 at 6:30 PM vikrant8051 <vikrant8051@gmail.com> wrote:


HI Jiri,
After latest sync with master, I've not faced MPU FAULT issue
while testing. But it could be there. With v1.13, it could be suddenly
pops-up without any reason (as a app developer)



Thanks for linking your issue with this mailing list. Hope Zephyr

core developers will resolve it.



Regards,
vikrant







On Mon, Sep 17, 2018 at 12:37 PM Jiří Kubias <jiri.kubias@gmail.com> wrote:


Hi,
have you found a solution? Few days ago I have reported similar problem with MPU fault but with Atmel (Microchip) SAME70 chip. It is cased by binding DMA.

dev_cfg->dev_dma = device_get_binding(CONFIG_SPI_SAM_DMA_NAME);
if (!dev_cfg->dev_dma) {
SYS_LOG_ERR("%s device not found", CONFIG_SPI_SAM_DMA_NAME);
return -ENODEV;
}





and the console output is

***** MPU FAULT *****
Data Access Violation
MMFAR Address: 0x412198
***** Hardware exception *****
Current thread ID = 0x204024b4
Faulting instruction address = 0x40e376
Fatal fault in essential thread! Spinning...





So far I didnt solved the issue, but I didnt had a much time to debug it.


Best regards,
Jiri






2018-09-14 12:33 GMT+02:00 vikrant8051 <vikrant8051@gmail.com>:

Hi Carles,
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>> Did you run addr2line in 0x20001c5c?


***** MPU FAULT *****

Instruction Access Violation

***** Hardware exception *****

Current thread ID = 0x20001884

Faulting instruction address = 0x20001c88

Fatal fault in ISR! Spinning...



1)

/opt/zephyr-sdk/sysroots/x86_64-pokysdk-linux/usr/bin/arm-zephyr-eabi/arm-zephyr-eabi-addr2line -e /home/vikrant/zephyr/samples/boards/nrf52/mesh/onoff_level_lighting_vnd_app/build/zephyr/zephyr.elf
0x20001c88


&




/opt/zephyr-sdk/sysroots/x86_64-pokysdk-linux/usr/bin/arm-zephyr-eabi/arm-zephyr-eabi-addr2line
-e /home/vikrant/zephyr/samples/boards/nrf52/mesh/onoff_level_lighting_vnd_app/build/zephyr/zephyr.elf 0x20001884


Both returns -> :? ...... with zephyr-SDK


2)

I also tried to compile the App using latest gcc-arm-none-eabi-7-2018-q2



2.1)

/opt/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-addr2line -e /home/vikrant/zephyr/samples/boards/nrf52/mesh/onoff_level_lighting_vnd_app/build/zephyr/zephyr.elf 0x20001c88



o/p -> isr_tables.c:?


2.2)

/opt/gcc-arm-none-eabi-7-2018-q2-update/bin/arm-none-eabi-addr2line -e /home/vikrant/zephyr/samples/boards/nrf52/mesh/onoff_level_lighting_vnd_app/build/zephyr/zephyr.elf 0x20001884


o/p -> /home/vikrant/zephyr/kernel/init.c:80

-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

>> Have you tried increasing stack sizes?


Yes.
CONFIG_MAIN_STACK_SIZE=512 ....to 1024
CONFIG_SYSTEM_WORKQUEUE_STACK_SIZE=2048 ....to 4096


But still getting MPU Fault in case of Board executing BT Mesh Servers.













On Fri, Sep 14, 2018 at 3:31 PM Cufi, Carles <Carles.Cufi@nordicsemi.no> wrote:


Hi there,

Did you run addr2line in 0x20001c5c?
Have you tried increasing stack sizes?

Carles

From:
devel@lists.zephyrproject.org <mailto:devel@lists.zephyrproject.org> <devel@lists.zephyrproject.org>
On Behalf Of vikrant8051
Sent: 14 September 2018 11:48
To:
devel@lists.zephyrproject.org <mailto:devel@lists.zephyrproject.org>;
users@lists.zephyrproject.org <mailto:users@lists.zephyrproject.org>
Subject: Re: [Zephyr-devel] MPU fault while testing Bluetooth Mesh Sample demos



Hi,



FYI,

With v1.12.99 I'm mot facing any MPU FAULT issue (while testing for #onoff_level_lighting_vnd_app)


It has last commit -> ba6763a187a347cfc825a2bece78e7d1ef28772d



That means something after it has changed the things bcz of that we are getting

MPU FAULT.



Thank You !!




On Wed, Sep 5, 2018 at 10:50 AM vikrant8051 <vikrant8051@gmail.com> wrote:


Hi,

I'm getting following MPU fault while testing with samples for Bluetooth Mesh . This issue has started after syncing with master branch.



***** MPU FAULT *****

Instruction Access Violation

***** Hardware exception *****

Current thread ID = 0x2000188c

Faulting instruction address = 0x20001c5c

Fatal fault in ISR! Spinning...





Thank You !!



























--
===================================================
Ing. Jiri Kubias

e-mail: jiri.kubias@gmail.com
mobile: 775 593 956
===================================================


















--
===================================================
Ing. Jiri Kubias

e-mail: jiri.kubias@gmail.com
mobile: 775 593 956
===================================================

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