How to do buttonless dfu

[ps_anu]

Hi, 

I am using nRF52832 and sdk 16

I am done secure bootloader dfu. By generating the new firmware application. Zip  , this part is working fine

Now I want to do buttonless dfu.  How to generate the bootloader settings? 

2.i have merged all the hex file into single hex file which include bootloader, softdevice, and application

3.how can I make my device to switch to dfu mode? 

Please suggest me an answer. 

Thanks

1. Pspavi

[Nikosant03]

Hi pspavi,

In order to enter DFU mode you have to use th Buttonless Secure DFU Service. the service will accept a data value (a characteristic) and write it to a register that is persistent across a device reset. The bootloader then reads this register to determine if it should continue with the DFU function, or pass control back to the application.

You can start by looking the ble_app_buttonless_dfu example. There are several things you have to do during integration. This is a great tutorial to follow

Hope that helps

Nick

[ps_anu]

Thank you for you response Nikosant 

yeah i followed the tutorial which you shared , i am getting undefined reference nrf_dfu_set_adv_name_svci_async_t

 i have done all the steps as per above tutorial

[Vidar Berg]

Any chance you can upload the project here?

[ps_anu]

sure , 

dfu modified ble_app_uart.rar

[Vidar Berg]

I only found your modified main.c file in the attachment. I need the full project.

[Vidar Berg]

The preprocessor definitions we asked you to add were not included in the project you sent me.

[ps_anu]

No previously I have included that. Have you tried by adding this? 

[Vidar Berg]

Yes, it worked once I added the missing defintions.

[ps_anu]

yes it is worked , I am have complied  successfully . Followed the above tutorial , after merging all hex file 

1. secure bootloader 

2. softdevice 

3.  ble_app_uart_dfu (modified)

4. bootloader_settings.hex 

using nrfjprog command programmed the dk with merged hex files 

after power cycle , i couldn't able to see the device name in nrf_connect . I tried by testing with dfu_test_images precomplied hex file that is working fine 

nrfutil settings generate --family NRF52840  --application secure_bootloader_ble_s140_pca10056.hex --application-version 0 --bootloader-version 0 --bl-settings-version 2  ble_buttonless.hex
mergehex --merge ble_buttonless.hex ble_app_uart_s140_pca10056.hex --output  buttonless.hex


nrfjprog -f nrf52 --recover
nrfjprog --program ble_buttonless.hex
Parsing hex file.
Reading flash area to program to guarantee it is erased.
Checking that the area to write is not protected.
Programming device.

please guide me where i have done mistake 

[Nikosant03]

Can you start a debugging session and check if there is any error in the output terminal? Some times this is related with RAM size and RAM start. Did you adjust these parameters for the new added services?

[ps_anu]

yes i have changed ram size  , complied successfully. But while transferring the file in nrf connect , it is showing waiting for bootloader , initializing the bootloader , firmware update  disconnecting by the remote device . . again it is  waiting for bootloader

please have look at the below pic 

nrfutil pkg generate --hw-version 52840 --application-version 1 --application ble_app_uart_pca10056_s140.hex --sd-req 0xCA --sd-id 0xCA --key-file private.key  app_dfu_package.zip
//even i tried the application version 0 and 2 also same results

[Vidar Berg]

Have you remembered to set up the SVCI interface with ble_dfu_buttonless_async_svci_init() at the start of main()?