when set NRF_LOG_DEFAULT_LEVEL as 1 in sdk_config.h, OTA failed

[Pepper]

I am using nRF52840 development software based on ble_app_uart_c, and I found that when I set NRF_LOG_DEFAULT_LEVEL as 1, if I download the software by Segger, the device worked well.  If I updated the software by OTA, the devcie cannot start.  If I set NRF_LOG_DEFAULT_LEVEL  as 3, updating the software by OTA, the device worked well.

[Pepper]

When NRF_LOG_DEFAULT_LEVEL set as 1, the compiled app uploaded to the device by OTA, the device didn't get start. I don't know how to catch the logs.

[Jared]

Hi,

The example should print out the logs over RTT. Use J-link RTT viewer to view the logs.

regards

Jared 

[Pepper]

Hi,

The error logs show following:

<info> app: ATT MTU exchange completed.
00>
00> <info> app: Discovery complete.
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:09 2034
00>
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:09 2034
00>
00>
00> <info> app: Disconnected.
00>
00> <info> app: ATT MTU exchange completed.
00>
00> <info> app: Discovery complete.
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:29 2034
00>
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:29 2034
00>
00>
00> <info> app: Disconnected.
00>
00> <info> app: Disconnected.
00>
00> <info> app: ATT MTU exchange completed.
00>
00> <info> app: Discovery complete.
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:16 2034
00>
00> <info> app: Inside main
00>
00> <debug> app: In nrf_bootloader_init
00>
00> <debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
00>
00> <debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
00>
00> <debug> nrf_dfu_settings: Using settings page.
00>
00> <debug> nrf_dfu_settings: Copying forbidden parts from backup page.
00>
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00>
00> <info> nrf_dfu_settings: Backing up settings page to address 0xFE000.
00>
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00>
00> <debug> app: Enter nrf_bootloader_fw_activate
00>
00> <debug> app: Valid App
00>
00> <debug> app: Enter nrf_dfu_app_continue
00>
00> <error> app: Received a fault! id: 0x00004002, pc: 0x00000000, info: 0x2003FF70
00>
00> <info> app: Time queried. Returned: Sun Mar 05 00:07:16 2034
00>

[Jared]

Hi,

It seems like you're hitting an error inside app_activate(). 

Can you use the bootloader_debug project instead? It has the hardfault library already enabled, which means that the log will be more verbose, which helps us pinpoint where the issue is.  Can you use that project and see if the log specifies exactly where it faults?

regards

Jared 

[Pepper]

no_starting_logs.txt

Hi Jared,

Here is the debug logs.

[Hung Bui]

Hi Cynthia, 

I'm taking over the case from Jared as it's more of a DFU case  . 

Could you give me more information about your SDK version ? Also the board/IC version. Are you testing on a DK ? 

If you try doing DFU with an unmodified bootloader do you see the same issue ? 

Also could you you explain a little bit about the log, I can find that there are quite a lot of WDT feed before the actual activity in main. Have you made sure the WDT is fed when the bootloader started ? 

From what I can see in the log, the assert happened inside app_activate()  , most likely inside image_copy() function. 

I would suggest to use the _debug version of the bootloader and put a breakpoint inside app_activate() and step through the code. 

[Pepper]

Hi Hung,

Thanks for your reply.

1. I'm developing bootloader on  pca10056_s140_ble_debug. I'm using SDK16 + nRF52840. PCA10056+s140. I'm testing  on our borad.

2. I did DFU with SDK bootloader only changing NRF_DFU_BLE_ADV_NAME, I didn't see the same issue.

3. There is a extern WDT on our board. Initialy I want to add a app timer to feed the extern WDT and control a green LED and a blue LED to flash in cycle, but it failed. So I open inner wdt , and added code in wdt_feed()  function of nrf_bootloader_wdt.c to feed  extern wdt and control the two LED flash.

Could you give me any advice about how to add an app timer ?

Thanks in advance.

[Hung Bui]

Hi Cynthia, 

At point 2, you meant if you test with unmodified bootloader example you don't see the issue and you can complete the DFU update without any issue ? 

Which modification did you add to the bootloader besides the external WDT handling ? If you remove the external WDT handling would it work ? 

Regarding the app timer, the bootloader has its own timer library called nrf_bootloader_dfu_timers.c You can find how the mp_wdt_feed and mp_inactivity is defined in the file. You can add your own timer in by modifying m_timers[]. Note that each timer occupy one CC register and with nRF52840 you have max 4 CC registers.