few questions about bootloader settings

[ziv123]

hello Nordic

i am working with nrf52832 soc with SDK 16.0, S132 V7.0.1

following this path:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/software-development-kit/posts/getting-started-with-nordics-secure-dfu-bootloader

and this : https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nrfutil%2FUG%2Fnrfutil%2Fnrfutil_settings_generate_display.html

1. when trying to read current setting of existing bootloader in the examples i get this:

C:\Nordik SDK\examples\dfu\secure_bootloader>nrfutil settings display pca10040_uart\ses\Output\Release\Exe\secure_bootloader_uart_mbr_pca10040.hex
Bad access at 0x7F000: not enough data to read 4 contiguous bytes
Usage: nrfutil settings display [OPTIONS] HEX_FILE

Error: Failed to parse .hex file: Bad access at 0xFF000: not enough data to read 4 contiguous bytes

why is that ?

2. if i generate a setting for the bootloader and i include the softdevice in the "nrf settings generate command (like so:  --softdevice FILE s132_nrf52_7.0.1_softdevice.hex)

do i still need to mergehex the bootloader with the s132 hex file ? considering that when i flash my application (using SEGGER) after erasing the nrf52832 i do not need to flash the softdevice separately

3. the settings generate command refers to application version, do i need to change the setting each time i change application version or it's name (considering the version is in the name) ?

4. if i mergehex the bootloader settings hex file with the bootloader hex file and i flash the bootloader without having an application flashed on the device, what will happen ? would i be able to flash the application via SEGGER normally or must i have the application hex flashed before the flashing of the bootloader or mergehex with the bootloader ?

that it for now

p.s. 5. in the dfu examples, what's the difference between pca10040_uart to pca10040_uart_debug can both be used for production also can they be used for a PCB not an nrf52832DK ? 

hope to read from you soon

best regards

Ziv

 

[Einar Thorsrud]

Hi Ziv,

1. when trying to read current setting of existing bootloader in the examples i get this:

The bootloader settings page is not part of the hex file you get when you build the bootloader. This is why parsing it with nrfutil fails (as expected).

2. if i generate a setting for the bootloader and i include the softdevice in the "nrf settings generate command (like so:  --softdevice FILE s132_nrf52_7.0.1_softdevice.hex)

do i still need to mergehex the bootloader with the s132 hex file ? considering that when i flash my application (using SEGGER) after erasing the nrf52832 i do not need to flash the softdevice separately

Yes you still need to merge all hex files you want to program, including the bootloader settings page.

3. the settings generate command refers to application version, do i need to change the setting each time i change application version or it's name (considering the version is in the name) ?

The application version and bootloader version needs to be incremented each time you make a new version. This is because the bootloader prevents downgrades and (optionally) also prevents upgrading to the same version. It is the number (integer) that matters here, the string is more for user-friendliness.

4. if i mergehex the bootloader settings hex file with the bootloader hex file and i flash the bootloader without having an application flashed on the device, what will happen ? would i be able to flash the application via SEGGER normally or must i have the application hex flashed before the flashing of the bootloader or mergehex with the bootloader ?

If the application is not present, the bootloader will enter DFU mode. If you subsequently flash the application and this is the exact application hex that was used to generate the hex file, the app will be started. If the application has changes in any way, the bootloader will not be able to validate the application (as the CRC has changed), and the bootloader will enter DFU mode.

p.s. 5. in the dfu examples, what's the difference between pca10040_uart to pca10040_uart_debug can both be used for production also can they be used for a PCB not an nrf52832DK ? 

Both can be used for custom HW as well as for the DK. The debug version includes RTT logging, which increases the size of the bootloader. It is only usable from a debugger.

Regarding using it for release you can do it, though it often does not make sense as you will typically not have RTT access in the field anyway. If you do it, you should do some adaptations. For instance, the error handler behaves differently depending on the build type:

static void on_error(void)
{
    NRF_LOG_FINAL_FLUSH();

#if NRF_MODULE_ENABLED(NRF_LOG_BACKEND_RTT)
    // To allow the buffer to be flushed by the host.
    nrf_delay_ms(100);
#endif
#ifdef NRF_DFU_DEBUG_VERSION
    NRF_BREAKPOINT_COND;
#endif
    NVIC_SystemReset();
}

Einar

[ziv123]

Einar Thorsrud said:

The application version and bootloader version needs to be incremented each time you make a new version. This is because the bootloader prevents downgrades and (optionally) also prevents upgrading to the same version. It is the number (integer) that matters here, the string is more for user-friendliness.

i think i am missing something.. one of the reasons as i see it to create a bootloader setting file is so i can have a bootloader on my board and still be able to flash some changes to the application via SEGGER. since i am still on development stage it will take to long to do a whole DFU procedure every time i want to check a motor speed or any other small change.

if i understood you correct then i will have to create a new bootloader setting file, merge it with bootloader, softdevice and application each time i want to make even a small change. so how does it save me time and effort 

1. is there is some other simpler way to achieve that? or is there a way to do this automatically with SEGGER 

2. when some products our out on the market, what if i want to return to a previous version if i found some problem with the new release, but the bootloader wont allow downgrading ?

hope to read from you soon

best regards

Ziv

[ziv123]

still does not work for the second time though no nothing crashes and i do get into the bootloader

here is the log

<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037880, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037880, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000378C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000378C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037900, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037900, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037940, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037940, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037980, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037980, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000379C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000379C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037A00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037A00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037A40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037A40, pending 0
0x1
a)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037A80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037A80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037AC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037AC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037B00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037B00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037B40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037B40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037B80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037B80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037BC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037BC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037C00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037C00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037C40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037C40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037C80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037C80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037CC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037D00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037D00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037D40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037D40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037D80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037D80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037DC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037DC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037E00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037E00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037E40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037E40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037E80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037E80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037EC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037EC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037F00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037F00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037F40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037F40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037F80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00037F80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00037FC0, src=0x200016F8, len=64 bytes), queue usage: 1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_flash: Flash write success: addr=0x00037FC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_CRC_GET (data)
<debug> nrf_dfu_req_handler: Offset:73728, CRC:0x9A18F8FD
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_serial: Sending Response: [0x3, 0x1]
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_EXECUTE (data)
<debug> nrf_dfu_serial: Sending Response: [0x4, 0x1]
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> app: timer_stop (0x20000024)
<debug> app: timer_activate (0x20000024)
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_CREATE (data)
<debug> nrf_dfu_flash: nrf_fstorage_erase(addr=0x0x00038000, len=1 pages), queue usage: 1
<debug> nrf_dfu_flash: Flash erase success: addr=0x00038000, pending 0
<debug> nrf_dfu_req_handler: Creating object with size: 3632. Offset: 0x00012000, CRC: 0x9A18F8FD
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_serial: Sending Response: [0x1, 0x1]
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038000, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038000, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038040, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038040, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038080, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038080, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000380C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000380C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038100, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038100, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038140, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038140, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038180, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038180, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000381C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000381C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038200, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038200, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038240, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038240, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038280, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038280, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000382C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000382C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038300, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038300, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038340, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038340, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038380, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038380, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000383C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000383C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038400, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038400, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038440, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038440, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038480, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038480, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000384C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000384C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038500, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038500, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038540, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038540, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038580, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038580, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000385C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000385C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038600, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038600, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038640, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038640, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038680, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038680, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000386C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000386C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038700, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038700, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038740, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038740, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038780, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038780, pending 0
0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000387C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000387C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038800, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038800, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038840, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038840, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038880, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038880, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000388C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000388C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038900, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038900, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038940, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038940, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038980, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038980, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x000389C0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x000389C0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038A00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038A00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038A40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038A40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038A80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038A80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038AC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038AC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038B00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038B00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038B40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038B40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038B80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038B80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038BC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038BC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038C00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038C00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038C40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038C40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038C80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038C80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038CC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038CC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038D00, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038D00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038D40, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038D40, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038D80, src=0x2000177C, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038D80, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<info> nrf_dfu_serial_uart: Allocated buffer 20001778
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_WRITE (data)
<debug> nrf_dfu_flash: nrf_fstorage_write(addr=0x00038DC0, src=0x200016F8, len=64 bytes), queue usage: 1
<debug> nrf_dfu_flash: Flash write success: addr=0x00038DC0, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
a)
x2000177C, len=48 bytes), queue usage: 1
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_flash: Flash write success: addr=0x00038E00, pending 0
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_CRC_GET (data)
<debug> nrf_dfu_req_handler: Offset:77360, CRC:0x6783725B
<debug> nrf_dfu_req_handler: Request handling complete. Result: 0x1
<debug> nrf_dfu_serial: Sending Response: [0x3, 0x1]
<info> nrf_dfu_serial_uart: Allocated buffer 200016F4
<debug> nrf_dfu_req_handler: Handle NRF_DFU_OP_OBJECT_EXECUTE (data)
<debug> nrf_dfu_req_handler: Whole firmware image received. Postvalidating.
<debug> nrf_dfu_validation: Hash verification. start address: 0x26000, size: 0x12E30
<debug> nrf_dfu_validation: Invalidating old application in bank 0.
<debug> nrf_dfu_serial: Sending Response: [0x4, 0x1]
<debug> nrf_dfu_settings: Writing settings...
<debug> nrf_dfu_settings: Erasing old settings at: 0x0007F000
<debug> nrf_dfu_flash: nrf_<info> app: Inside main
<debug> app: In nrf_bootloader_init
<debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
<debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
<debug> nrf_dfu_settings: Using settings page.
<debug> nrf_dfu_settings: Copying forbidden parts from backup page.
<debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
<info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
<debug> nrf_dfu_settings: Destination settings are identical to sou<info> app: Inside main
<debug> app: In nrf_bootloader_init
<debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
<debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
<info> app: Inside main
<debug> app: In nrf_bootloader_init
<debug> nrf_dfu_settings: Calling nrf_dfu_settings_init()...
<debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
<debug> nrf_dfu_settings: Using settings page.
<debug> nrf_dfu_settings: Copying forbidden parts from backup page.
<debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
<info> nrf_dfu_settings: Backing up settings page to address 0x7E000.
<debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
<debug> app: Enter nrf_bootloader_fw_activate
<info> app: No firmware to activate.
<debug> app: App is valid
<debug> app: DFU mode requested via GPREGRET.
<info> nrf_bootloader_wdt: WDT enabled CRV:491520 ticks
<info> nrf_bootloader_wdt: Starting a timer (488320 ticks) for feeding watchdog.
<debug> app: timer_activate (0x20000034)
<debug> app: in weak nrf_dfu_init_user
<debug> app: timer_stop (0x20000024)
<debug> app: timer_activate (0x20000024)
<info> app: Entering DFU mode.
<debug> app: Initializing transports (found: 1)
<debug> nrf_dfu_serial_uart: serial_dfu_transport_init()
<debug> nrf_dfu_serial_uart: serial_dfu_transport_init() completed
<debug> nrf_dfu_flash: Initializing nrf_fstorage_nvmc backend.
<debug> app: Enter main loop
<info> app: Inside main
<debug> app: In nr

 

[Einar Thorsrud]

Hi,

After "Initializing nrf_fstorage_nvmc backend." the next line is "Enter main loop" which is the first line that is logged by the bootloader. So apparently here has been a reset for some reason. There is nothing in the log indicating why, though. Do you have a watchdog active or could it be another reason for the reset?

[ziv123]

the app has a watch dog but i thought that if i reset the app then the watchdog is gone .. or do i need to stop the watchdog before the soft reset before going to dfu ?

maybe bootloader has a watchdog ?

[Einar Thorsrud]

ziv123 said:

the app has a watch dog but i thought that if i reset the app then the watchdog is gone

The watchdog is not reset by a soft reset (see reset behavior table), so it will continue to run. Please test without a watchdog to see if that explains the issue you are seeing or not before going forward. (It could also be that the reset is caused by something else though I see no indication of what in the log).

ziv123 said:

or do i need to stop the watchdog before the soft reset before going to dfu ?

It is not possible to stop the watchdog once it has been started. The only way to stop the watchdog then is to perform one of the resets that stop it (see reset behavior table again).

ziv123 said:

maybe bootloader has a watchdog ?

No, but the bootloader can feed the watchdog for you if needed and does so automatically (see implementation in components\libraries\bootloader\nrf_bootloader_wdt.c). If you have a too short timeout it could cause problems, though.

[ziv123]

Hey Einar

Einar Thorsrud said:

Please test without a watchdog to see if that explains the issue you are seeing or not

indeed the watchdog seems to be the cause for the reset.

Einar Thorsrud said:

It is not possible to stop the watchdog once it has been started

however, after reading about this it seems to me that from the running application, without outside user intervention, the only reset which is possible for me is actually the watch dog reset which to my understanding only happen when watchdog timeout event is triggered, and no configuration to CVS or possibilities to change timer or triggers timeout event is possible. 

so, is it true that the only way i have to get a reset which will also rest the watchdog (considering no user intervention on pin pressing or shutting of the system) is to stuck my application until i get a timeout event ?

if this is the case this is very awkward

Einar Thorsrud said:

but the bootloader can feed the watchdog for you if needed and does so automatically

i don't want to create a dependency between the bl and the application

hope to read from you soon

best regards

Ziv

[Einar Thorsrud]

Hi Ziv,

ziv123 said:

indeed the watchdog seems to be the cause for the reset.

That is good. Then things make sense.

ziv123 said:

so, is it true that the only way i have to get a reset which will also rest the watchdog (considering no user intervention on pin pressing or shutting of the system) is to stuck my application until i get a timeout event ?

if this is the case this is very awkward

Yes that is true, as you see from the reset behavior table. It is also intentional to prevent any accidental disabling of the watchdog.

ziv123 said:

i don't want to create a dependency between the bl and the application

There is a dependency here, but it it quite weak as the bootloader reads the watchdog configuration from the watchdog itself, though you may need to make some adjustments in special cases. Generally the main thing is that you should ensure that you do not have a too short watchdog timeout. In any case there is no way around handing this in the bootloader if you use a watchdog, as you cannot disable the watchdog in an elegant way. (And if you do disable it by allowing it to time out, a watchdog reset also clears the retention registers, so you cannot rely on those for entering DFU mode).

[ziv123]

Hi Einar 

my bootloader has a WTD

if (dfu_enter)
    {
        nrf_bootloader_wdt_init();
        scheduler_init();
        dfu_enter_flags_clear();

not sure i understand where the configuration copy takes place, so maybe i am missing something there ?

the WTD timeout in my app is 15 seconds so is should be enough time since the timer in the bootloader for feeding the WTD is:

#define MAX_FLASH_OP_TIME_TICKS 3200 // ~100 ms

also, why not using nrfx_wtd..  in Nordic's bootloader uart (or any) examples ?

hope to read from you soon

best regards

Ziv

[Einar Thorsrud]

Hi Ziv,

ziv123 said:

not sure i understand where the configuration copy takes place, so maybe i am missing something there ?

This is all handled in the implementation in components\libraries\bootloader\nrf_bootloader_wdt.c. You can see that the reload value is read using nrf_wdt_reload_value_get(), and that is used to determine the frequency of feeding the bootloader.

ziv123 said:

the WTD timeout in my app is 15 seconds so is should be enough time since the timer in the bootloader for feeding the WTD is:

15 seconds should be no problem. This is not the time for feeding the WDT though, but a margin added because the CPU cannot run during flash operations.

ziv123 said:

also, why not using nrfx_wtd..  in Nordic's bootloader uart (or any) examples ?

The WDT driver primarily contain code for configuring and starting the WDT. That is not part of what the bootloader implementation does, as it just feeds a running bootloader. (strictly speaking the WDT driver also feeds the bootloader, but that is just by a single function call - nrf_wdt_reload_request_set() - which is also used by the bootloader).

It is a bit odd that you get this problems with the configuration you describe. Particularly it like the reset happens quite early as several things that should have been logged in the beginning of the bootloader is missing (like "WDT enabled CRV" etc).

Some suggestions:

1. Double check that the WDT reload value really is 15 seconds.
2. Make sure to feed the WDT right before you reset into the bootloader.
3. Add some logging when the bootloader feeds the WDT in the wdt_feed() function together with the call to nrf_wdt_reload_request_set(i) to see that it is actually fed.