Bootloader development on nRF52840

[Yashaswini S]

Hello,

I wanted to implement a bootloader on nRF52840 which is having 1024KB flash and 256Kb RAM. Can i get any link or tutorial on this if yes can anyone reply to this.

How can i achieve this in this nrf controller with detailed explanation or any libraries for this? How can i divide the flash memory for this so i am having all questions.

Thank you in advance.

[Vidar Berg]

Hello,

I recommend you go through Lesson 8 of our 'nRF Connect SDK Intermediate' course at https://academy.nordicsemi.com/courses/nrf-connect-sdk-intermediate/lessons/lesson-8-bootloaders-and-dfu-fota/. This lesson covers how you can enable the bootloader (MCUBoot) in your project and how to add DFU support in your application.

Best regards,

Vidar 

[Yashaswini S]

Hi,

I am referring to course that shared above in that, they have worked on Linux machine i.e. Ubuntu but I am working in windows so there while the communication between PC to Microcontroller not Happening, as that is having command line tool called Go but that is not supporting in the IDE that I am using Visual studio code.

So can I expect any reference to that,

Thank you in advance.

[Vidar Berg]

Hi,

The nRF Connect VS code extension does not integrate support for DFU programming. This must be done with the mcumgr-client from a terminal (can be also be opened in VS code) or with one of the other mcumgr Clients listed here: https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/services/device_mgmt/mcumgr.html#toolslibraries 

[Yashaswini S]

Thank you.

[Yashaswini S]

Hi,

The firmware update via uart from the Bootloader using Physical button is able to work, next step I have to do the same thing but without using button.

I have to reserve space in Bootloader on Flash and whenever the new version or updates present that time it has to check for that update has to done via Uart only, please suggest any of reference for this.

I am using nRF52840 microcontroller and Visual studio code for the development.

Thank you in advance.

[Vidar Berg]

Hi,

You can use the Retention System (https://docs.nordicsemi.com/bundle/ncs-2.6.1/page/zephyr/services/retention/index.html) to enable buttonless entry into Serial recovery mode. However, you need to implement a mechanism on the DFU controller to check for new updates and initiate the DFU process.

[Yashaswini S]

Hello,

I am working bootloader development with second method i.e DFU from Uart via Applicataion, in that i'm following same steps given by nordic dev course but while updating new firmware using command it is not updating properly.

It will got paused and will be like that, for the i will share image of that, please reply for this as soom as possible.

Thank you

[Vidar Berg]

Hello,

Please enable logging over RTT in the application to see if there are any runtime errors reported when you initiate DFU.

[Yashaswini S]

Hi,

Can we use external Putty updating new firmware?

if yes, in that have to use mcumgr commands or any diffrenet commands are there?

Thank you in advance

[Vidar Berg]

Hi,

Putty does not include mcumgr support.

https://docs.nordicsemi.com/bundle/ncs-latest/page/zephyr/services/device_mgmt/mcumgr.html#toolslibraries