nrf52820 dfu

[shsh]

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 0x3E000.
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> <info> app: No firmware to activate.
00> 
00> <debug> app: App is valid
00> 
00> <warning> nrf_dfu_settings: No additional data erased
00> 
00> <info> nrf_dfu_settings: Backing up settings page to address 0x3E000.
00> 
00> <debug> nrf_dfu_settings: Destination settings are identical to source, write not needed. Skipping.
00> 
00> <debug> app: Running nrf_bootloader_app_start with address: 0x00001000
00> 
00> <debug> app: Disabling interrupts. NVIC->ICER[0]: 0x0

C:\Users\Wzc\Desktop\nrf52820>nrfutil settings generate --family NRF52QFAB --application nrf52820_xxaa.hex --application-version 1 --bootloader-version 1 --bl-settings-version 2 settings.hex

Note: Generating a DFU settings page with backup page included.
This is only required for bootloaders from nRF5 SDK 15.1 and newer.
If you want to skip backup page generation, use --no-backup option.

Generated Bootloader DFU settings .hex file and stored it in: settings.hex

Bootloader DFU Settings:
* File:                     settings.hex
* Family:                   nRF52QFAB
* Start Address:            0x0003F000
* CRC:                      0x23A3546F
* Settings Version:         0x00000002 (2)
* App Version:              0x00000001 (1)
* Bootloader Version:       0x00000001 (1)
* Bank Layout:              0x00000000
* Current Bank:             0x00000000
* Application Size:         0x00001BA0 (7072 bytes)
* Application CRC:          0x3D49775F
* Bank0 Bank Code:          0x00000001
* Softdevice Size:          0x00000000 (0 bytes)
* Boot Validation CRC:      0x2CE0301F
* SD Boot Validation Type:  0x00000000 (0)
* App Boot Validation Type: 0x00000001 (1)

This is the command I used to generate setting.hex.The primary address of my app is 0x19000.

This is my hex distribution. The library used is nRF5_SDK_17.1.0_ddde560.
Now the app is not functioning properly. Why is that?
The log indicates that the jump has been made, but the app did not execute.
thanks

[Vidar Berg]

Hello,

The settings page looks to be correctly generated. The bootloader also sees it as valid since it does try to jump to the application. Please try to read out the CPU registers after the jump to see if this may provide us with some more clues as to what's wrong.

Reading the CPU register with nrfutil from command line:

$ nrfutil device cpu-register-read  

Best regards,

Vidar

[shsh]

What about this one?

nrfutil device cpu-register-read
error: unrecognized subcommand 'cpu-register-read'

[shsh]

Hello, I just did a debug and found that the application can start but gets stuck after only one execution. This is very strange because it doesn't happen in the bare-metal application.
There is no low-speed crystal oscillator on my board. I have selected the internal RC option in the DFU mode. However, I couldn't find the definition of the low-speed clock in the app. The app I'm using is the UART routine. The current situation is that once the app enters the printf function, it will freeze. Including the sending function of SPI, it would get stuck when entering. I have never figured out the reason for this. Because on the bare machine, printf and the SPI sending function work normally.

[shsh]

I found that the app kept restarting. After running once, it would freeze and then restart.

[Vidar Berg]

Is UART_HWFC set to 'True'? In that case, please set it to 'False' and see if it still hangs. 

[shsh]

UART_HWFC is false

[Vidar Berg]

Then I don't see how it could become "stuck" in the printf call. Please pause the debugger in Keil and take a screenshot that shows where the program hangs.