Nordic nRF52840: Difference between revisions

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I have 2 of the Nordic tiny dev boards in the USB form factor,  
I have an nRF52840-DK developer board ($49) and 2 of the Nordic tiny dev boards in the USB form factor, [https://www.nordicsemi.com/Products/Development-hardware/nrf52840-dongle NRF52840-DONGLE] from Digikey, about $10 each.
[https://infocenter.nordicsemi.com/index.jsp?topic=/ug_nrf52840_dongle/UG/nrf52840_Dongle/getting_started.html NRF52840-DONGLE] from Digikey, about $10 each.
 
Nordic [https://infocenter.nordicsemi.com/index.jsp?topic=/ug_nrf52840_dongle/UG/nrf52840_Dongle/getting_started.html Getting started]guide


They can do Zigbee, which is why I got them and of course have done nothing with so far.
They can do Zigbee, which is why I got them and of course have done nothing with so far.


== My first project: HID Keyboard ==
== Loading Circuit Python ==
 
The nrf52840 supports USB making it easy to program.
 
I can put CircuitPython on it.
Install the dev tools: [https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop nRF Connect for desktop]
Use that to install the [https://infocenter.nordicsemi.com/index.jsp?topic=%2Fug_nc_programmer%2FUG%2Fnrf_connect_programmer%2Fncp_introduction.html programmer].
 
I think it's now possible to use an Adafruit fork of the Nordic utility to get the Circuit Python bootloader installed.
 
The other option is to use either a very expensive Segger J-Link (+$800) or the $49 Nordic nRF52840-DK development board. I got one of the $49 boards, here we go. Alas it has a weird tiny connector so, another cable? Oy.
 
=== Install bootloader ===
 
https://github.com/adafruit/Adafruit_nRF52_Bootloader/blob/master/README.md


The nrf52840 supports USB, which means I can put CircuitPython on them,
conda create -n adafruit-nrf
I did that then put the "Hello world" app on there and changed it to
conda activate adafruit-nrf
playback my long and complex password.
pip3 install adafruit-nrfutil


Nordic [https://infocenter.nordicsemi.com/index.jsp?topic=/ug_nrf52840_dongle/UG/nrf52840_Dongle/getting_started.html Getting started]guide
Download a bootloader from https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases
I used https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/download/0.6.4/mdk_nrf52840_dongle_bootloader-0.6.4_s140_6.1.1.zip


[https://www.nordicsemi.com/Software-and-Tools/Development-Tools/nRF-Connect-for-desktop Windows driver], none available for Mac.
adafruit-nrfutil dfu serial -p com3 -pkg *hex


After getting the board to connect as a mass storage device then I can put
After getting the board to connect as a mass storage device then I can put
Line 18: Line 34:
I think for this board, I will need to install their bootloader too.
I think for this board, I will need to install their bootloader too.


Once it's all loaded, then I just need to copy the code.py file onto it and change one string. It powers on and becomes an HID keyboard in about 2 seconds and then on each keypress it plays my password. Ta-da!
== My first project: HID Keyboard ==
 
When I got CircuitPython running I put the "Hello world" app on there and changed it to
playback my long and complex password. That's it for this project!
 
It powers on and becomes an HID keyboard in about 2 seconds and then on each button press it plays my password. Ta-da!
 
Other ways I could do this: I could use a Adafruit RP2040 Feather for $10. I already got it going on an Adafruit Circuit Playground Express $25.
 
It's about what's in my <s>junk drawer</s> inventory, not what it costs. The nRF is a handy form factor. A Pi Zero for $5 would work but I don't own one and it would require booting Linux so it would be too slow. I did try out the HID keyboard thing on a Pi Zero W. Too complicated. A $4 Pico would work but does it have a button? (No.)
 
== nRF52840 DK ==
https://nordicsemi.com/start52840dk
 
===== JTAG =====
The DK board has a Segger J-Link JTAG built in. The drivers install as part of the toolkit that's now installed on [[Pearl]].
They have a wiki for it here: [https://wiki.segger.com/ Segger wiki]
 
== Resources ==
 
https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/GetStarted#infotabs


Other ways I could do this: I could use a Raspberry Pi Pico for $4, I already got it going on an Adafruit Circuit Playground Express $25.  
RIOT operating system https://doc.riot-os.org/group__boards__nrf52840-mdk-dongle.html


It's about what's in my <s>junk drawer</s> inventory, not what it costs. The nRF is a handy form factor. A Pi Zero for $5 would work but I don't own one and it would require booting Linux so it would be too slow. I did try out the HID keyboard thing on a Pi Zero W. Too complicated
Nordic documentation https://docs.nordicsemi.com/

Latest revision as of 05:41, 3 January 2024

I have an nRF52840-DK developer board ($49) and 2 of the Nordic tiny dev boards in the USB form factor, NRF52840-DONGLE from Digikey, about $10 each.

Nordic Getting startedguide

They can do Zigbee, which is why I got them and of course have done nothing with so far.

Loading Circuit Python

The nrf52840 supports USB making it easy to program.

I can put CircuitPython on it. Install the dev tools: nRF Connect for desktop Use that to install the programmer.

I think it's now possible to use an Adafruit fork of the Nordic utility to get the Circuit Python bootloader installed.

The other option is to use either a very expensive Segger J-Link (+$800) or the $49 Nordic nRF52840-DK development board. I got one of the $49 boards, here we go. Alas it has a weird tiny connector so, another cable? Oy.

Install bootloader

https://github.com/adafruit/Adafruit_nRF52_Bootloader/blob/master/README.md 

conda create -n adafruit-nrf
conda activate adafruit-nrf
pip3 install adafruit-nrfutil

Download a bootloader from https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases I used https://github.com/adafruit/Adafruit_nRF52_Bootloader/releases/download/0.6.4/mdk_nrf52840_dongle_bootloader-0.6.4_s140_6.1.1.zip 

adafruit-nrfutil dfu serial -p com3 -pkg *hex

After getting the board to connect as a mass storage device then I can put Circuit Python onto it. I think for this board, I will need to install their bootloader too.

My first project: HID Keyboard

When I got CircuitPython running I put the "Hello world" app on there and changed it to playback my long and complex password. That's it for this project!

It powers on and becomes an HID keyboard in about 2 seconds and then on each button press it plays my password. Ta-da!

Other ways I could do this: I could use a Adafruit RP2040 Feather for $10. I already got it going on an Adafruit Circuit Playground Express $25.

It's about what's in my junk drawer inventory, not what it costs. The nRF is a handy form factor. A Pi Zero for $5 would work but I don't own one and it would require booting Linux so it would be too slow. I did try out the HID keyboard thing on a Pi Zero W. Too complicated. A $4 Pico would work but does it have a button? (No.)

nRF52840 DK

https://nordicsemi.com/start52840dk

JTAG

The DK board has a Segger J-Link JTAG built in. The drivers install as part of the toolkit that's now installed on Pearl. They have a wiki for it here: Segger wiki

Resources

https://www.nordicsemi.com/Products/Development-hardware/nRF52840-DK/GetStarted#infotabs

RIOT operating system https://doc.riot-os.org/group__boards__nrf52840-mdk-dongle.html

Nordic documentation https://docs.nordicsemi.com/

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