MPU FAULT

RE: MPU FAULT

Amanda Hsieh — Wed, 25 Sep 2024 17:45:35 GMT

Please create a new support for the latest issue which is away from the original scope.

RE: MPU FAULT

bhargav_gondaliya — Tue, 24 Sep 2024 19:14:46 GMT

Hi, sorry for the late reply.

currently I'm working on other task.

How can I Implement long press button interrupt in zephyr? I followed https://docs.zephyrproject.org/latest/build/dts/api/bindings/input/zephyr,input-longpress.html for long press button interrupt.

If my reset button pressed for 10 sec below switch should be execute.

read_time(rtc_dev,(time_t *)&unix_time);
 uint32_t reset_pressed_epoch_time = unix_time;
 while (!gpio_pin_get_dt(&button_0) && (unix_time - reset_pressed_epoch_time) <= 10)
 {
 k_msleep(100);
 read_time(rtc_dev,(time_t *)&unix_time);
 }
 if (unix_time - reset_pressed_epoch_time > 10)
 {
 Reset_Flag=1;
 eeprom_write(i2c_dev,EEPROM_RESET_FLAG_ADDRESS, &Reset_Flag, 1);
 eeprom_write(i2c_dev,EEPROM_RESET_TIME_FLAG, &current_epoch_time, 4);
 guide_flag=1;
 eeprom_write(i2c_dev,EEPROM_DEVICE_GUIDE_ADDRESS,&guide_flag,1);
 reset_hardware_locally();
 //reset_hardware();
 k_msleep(1000);
 NVIC_SystemReset();
 }
 else
 {
 k_msleep(1000);
 NVIC_SystemReset();
 }

RE: MPU FAULT

Amanda Hsieh — Tue, 17 Sep 2024 15:23:50 GMT

Make sure to delete the build folder to rebuild again and Check the file <sample>/build/zephyr/.config what CONFIG_BT_RX_STACK_SIZE is currently set to and set it to a higher value in the prj.conf file.

RE: MPU FAULT

bhargav_gondaliya — Tue, 17 Sep 2024 11:06:59 GMT

Hi,

I am using NCS 2.6.0

I find the code for the addresses of r15/pc and r14/lr. Highlighted line for r14/lr.

RE: MPU FAULT

Amanda Hsieh — Mon, 16 Sep 2024 14:32:08 GMT

[quote user="bhargav_gondaliya"]I increased CONFIG_BT_RX_STACK_SIZE with different size (max tried 16384) but getting same error.[/quote]

Do you delete the build folder to rebuild again?

Check the file <sample>/build/zephyr/.config what CONFIG_BT_RX_STACK_SIZE is currently set to and set it to a higher value in the prj.conf file.

Which NCS version are you using?

[quote user="bhargav_gondaliya"]addr2line -e Redicine_zephyr/Remed/build/zephyr/zephyr.elf 0x20002348[/quote]

You should find the code for the addresses of r15/pc and r14/lr.

RE: MPU FAULT

bhargav_gondaliya — Sun, 15 Sep 2024 18:35:10 GMT

I increased CONFIG_BT_RX_STACK_SIZE with different size (max tried 16384) but getting same error.
and also I looked into debug course. using addr2line tool I checked BT_RX thread address.

addr2line -e Redicine_zephyr/Remed/build/zephyr/zephyr.elf 0x20002348
hci_core.c:?

RE: MPU FAULT

Amanda Hsieh — Fri, 13 Sep 2024 20:16:08 GMT

[quote user="bhargav_gondaliya"]main stack usage is 536 out of 4096 cpu : 99% why?[/quote]

Please take this course Lesson 2 – Debugging and troubleshooting which will guide you to use the Thread Viewer to show you information about the specific threads in the application.

[quote user="bhargav_gondaliya"]I increased CONFIG_BT_RX_STACK_SIZE to 4096 still facing same error[/quote]

Try to increase CONFIG_BT_RX_STACK_SIZE until the suitable value.

RE: MPU FAULT

bhargav_gondaliya — Fri, 13 Sep 2024 06:13:00 GMT

thread analyze logs.

main stack usage is 536 out of 4096 cpu : 99% why?

I increased CONFIG_BT_RX_STACK_SIZE to 4096 still facing same error.

RE: MPU FAULT

Amanda Hsieh — Thu, 12 Sep 2024 19:01:13 GMT

[quote user="bhargav_gondaliya"]

[00:00:45.221,496] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0

[00:00:45.221,527] <err> os: Current thread: 0x20002368 (BT RX)

[/quote]

The log indicated that the BT RX thread caused the fault.

Try increasing the stack size for that thread, using for instance CONFIG_BT_RX_STACK_SIZE=4096 in your prj.conf.

RE: MPU FAULT

bhargav_gondaliya — Thu, 12 Sep 2024 18:40:34 GMT

Hi Amanda,

sorry for the late reply.
I checked CONFIG_MAIN_STACK_SIZE with different values. max valued was 8192. but still facing same issue. I have created custom BLE service and added RX and TX characteristic for sending data from nrf connect app to nrf52832 device.

Below is my custom service, that I define

BT_GATT_SERVICE_DEFINE(my_service,
BT_GATT_PRIMARY_SERVICE(BT_UUID_MY_SERVICE),
BT_GATT_CHARACTERISTIC(BT_UUID_MY_SERVICE_RX,BT_GATT_CHRC_WRITE | BT_GATT_CHRC_WRITE_WITHOUT_RESP,
 BT_GATT_PERM_READ | BT_GATT_PERM_WRITE, 
 NULL, on_receive, NULL),
BT_GATT_CHARACTERISTIC(BT_UUID_MY_SERVICE_TX,
 BT_GATT_CHRC_NOTIFY,
 BT_GATT_PERM_READ,
 NULL, NULL, NULL),
BT_GATT_CCC(on_cccd_changed,
 BT_GATT_PERM_READ | BT_GATT_PERM_WRITE),
);
for your understanding.
I send a command 0201 and 4bytes user id from nrf connect app to a nrf52832 device and I got successfully response from device.
but got an error of buffer overflow detected.
 
* buffer overflow detected *
[00:00:45.221,405] <err> os: r0/a1:  0x00000002  r1/a2:  0x0000000b  r2/a3:  0x0000000a
[00:00:45.221,435] <err> os: r3/a4:  0x00000004 r12/ip:  0x00000004 r14/lr:  0x000178b5
[00:00:45.221,435] <err> os:  xpsr:  0x61000000
[00:00:45.221,435] <err> os: Faulting instruction address (r15/pc): 0x000178c0
[00:00:45.221,496] <err> os: >>> ZEPHYR FATAL ERROR 2: Stack overflow on CPU 0
[00:00:45.221,527] <err> os: Current thread: 0x20002368 (BT RX)
[00:00:45.698,181] <err> os: Halting system
Due to above error my device is getting disconnect from application.
also facing GATT errors. ERROR 133(0x85): GATT ERROR and ERROR 22(0x16): GATT CONN TERMINATE LOCAL HOST
below is my switch case that will be execute when I send command.
for response to client(application)

also Increased RX & TX stack size in prj.conf file.

provide a solution if any.

RE: MPU FAULT

Amanda Hsieh — Wed, 04 Sep 2024 13:49:07 GMT

What value of CONFIG_MAIN_STACK_SIZE did you try?

Please enable the following configs and provide the log again.

CONFIG_DEBUG_OPTIMIZATIONS – Limits the optimizations done by the compiler to only those that do not impact debugging.
CONFIG_DEBUG_THREAD_INFO – Adds additional information to the thread object so the debugger can discover the threads.

RE: MPU FAULT

bhargav_gondaliya — Wed, 04 Sep 2024 09:15:41 GMT

Hi,Amanda Hsieh

Thanks for the reply,

I adjust the CONFIG_MAIN_STACK_SIZE but still facing same error. Here you can see the peripheral I initialize in the main for nrf5 SDK and nrf connect sdk both are same configuration. I created a my custom ble service and added tx and rx characteristic. also I checked memory report, RAM 58% used.

size of tx and rx buffers are 255

Initialized in nrf connect sdk

Initialized in nrf5 sdk ( working without any error )

int main(void)
{
    bool erase_bonds;

    // Initialize.
    log_init();
    timers_init();
    pins_init(&erase_bonds);
    // EPD Setup start
    epd_init();
    //displayGuide();
    power_management_init();
    ble_stack_init();
    adc_configure();
    twi_master_init();
    read_eeprom();
   // display_guide();
    gap_params_init();
    gatt_init();
    advertising_init();
    services_init();
    conn_params_init();
    MCP7940_begin();
    MCP7940_now(&current_epoch_time);
    weekly_adherence_calculate();
    nrf_delay_ms(3000);
    MCP7940_now(&current_epoch_time);
    nrf_drv_saadc_sample();

    // Format time, "ddd yyyy-mm-dd hh:mm:ss zzz"
    latest_minute = *localtime(&current_epoch_time);
    latest_minute.tm_year = latest_minute.tm_year - 100;

    // Start execution.
    application_timers_start();
    advertising_start();

for(;;){

}

RE: MPU FAULT

Amanda Hsieh — Tue, 03 Sep 2024 13:18:16 GMT

Hi,

For the first error log in the figure, the fault message indicates that your device is running out of memory, which is caught by the MPU. Try adjusting CONFIG_MAIN_STACK_SiZE and see if this still occurs.

For the second error log, you can use Addr2line to get the line. See the Fatal errors part in this course and Debugging with addr2line in this course.

Regards,
Amanda H.