nrf52 serial DFU file loading sequence

RE: nrf52 serial DFU file loading sequence

Goudra — Wed, 23 Jan 2019 22:47:19 GMT

Hi,

Thank you for the reply.

Please provide your suggestion on below link.

https://devzone.nordicsemi.com/f/nordic-q-a/42873/uploading-issue-of-application-and-softdevice-file-from-the-master-serial-dfu

Thanks

Basava,

RE: nrf52 serial DFU file loading sequence

Vidar Berg — Tue, 22 Jan 2019 18:25:40 GMT

Hi Basava,

1. Generally yes, the bootloader does not impose any restrictions on this, but see my second answer.

2. As long as they are API compatible. That is, you can't do a major version upgrade of the softdevice without updating the application image. Major softdevice updates will have breaking API changes and/or change size, hence requiring the app to be re-compiled with new API headers and probably linked with a different start address.

3. Yes it should be possible.

[quote user="Goudra"]Please let me know which is the right procedure to write all files.[/quote]

The bootloader will reset itself during the activation process of the new images. So it should not be necessary for the DFU controller to issue a reset command between uploads (a new upload is started when you send the init packet).

Best regards,

Vidar

EDIT: Forgot to add that the bootloader must be merged with the softdevice image if you do a major softdevice update and the bootloader includes the BLE transport layer.

RE: nrf52 serial DFU file loading sequence

Goudra — Mon, 21 Jan 2019 23:06:43 GMT

Adding to above question.

1. Is it possible to load each file separately? (Bootloader, application and softdevice).

2. We want upload only SD file or bootloader file and application file base on the requirement. Is it possible to load any one file any time?

3. We Dont want to combine files and dont want load all files at same time. Is this possible?

Thanks

Basava.

RE: nrf52 serial DFU file loading sequence

Goudra — Mon, 21 Jan 2019 18:34:14 GMT

Hi,

Thank you for the reply.

Now I have created package. It has two .bin files (bt_app_42994+.bin and sd_bl.bin ) and two .dat files(bt_app_42994+.dat and sd_bl.dat).

Please let me know which is the right procedure to write all files.

Procedure A: Procedure B:

1. Write sd_bl.dat file 1. Write sd_bl.dat file

2. write sd_bl.bin file. 2. write sd_bl.bin file.

3. Write bt_app_42994+.dat file 3. Reset the device.

4. Write bt_app_42994+.bin file. 4.Write bt_app_42994+.dat file

5. Reset the device. 5.Write bt_app_42994+.bin file.

6. Reset the device.

can e merge package file with sequence in one file and load it. Like Procedure A: ?

Is it required to reset the device after loading one .dat and one .bin file Like Procedure B:?

Thanks and regards,

Basavanagouda.

RE: nrf52 serial DFU file loading sequence

Vidar Berg — Mon, 21 Jan 2019 08:54:31 GMT

Hi,

With nrfutil you can create one distribution packet that contains softdevice+bootloader and application, but the update needs to be performed in two rounds. First the you upload a merged binary of the softdevice and bootloader , then the application. The update sequence is illustrated in the documentation here.

> nrfutil.exe pkg generate --hw-version 52 --application-version 1 --application bt_app_42994.hex --bootloader-version 1 --bootloader bt_bl_42981+.hex --softdevice s132_nrf52_6.1.0_softdevice.hex --sd-req 0xAF --sd-id 1 sdblapp.zip

Best regards,

Vidar