This fork is necessary when compiling the firmware for the ErgoBlue keyboard. See the firmware page for more details.
This repository contains the Arduino BSP for Adafruit nRF52 series:
There are two methods that you can use to install this BSP. We highly recommend the first option unless you wish to participate in active development of this codebase via Github.
- Download and install the Arduino IDE (At least v1.6.12)
- Start the Arduino IDE
- Go into Preferences
- Add https://www.adafruit.com/package_adafruit_index.json as an 'Additional Board Manager URL'
- Restart the Arduino IDE
- Open the Boards Manager from the Tools -> Board menu and install 'Adafruit nRF52 by Adafruit'
- Once the BSP is installed, select 'Adafruit Bluefruit nRF52 Feather' from the Tools -> Board menu, which will update your system config to use the right compiler and settings for the nRF52.
- Install BSP via Board Manager as above to install compiler & tools.
- Delete the core folder
nrf52installed by Board Manager in Adruino15, depending on your OS. It could be
- macOS :
~/Library/Arduino15/packages/adafruit/hardware/nrf52 - Linux :
~/.arduino15/packages/adafruit/hardware/nrf52 - Windows:
%APPDATA%\Local\Arduino15\packages\adafruit\hardware\nrf52
cd <SKETCHBOOK>, where<SKETCHBOOK>is your Arduino Sketch folder:
- macOS :
~/Documents/Arduino - Linux :
~/Arduino - Windows:
~/Documents/Arduino
- Create a folder named
hardware/Adafruit, if it does not exist, and change directories to it - Clone this repo:
git clone https://github.com/adafruit/Adafruit_nRF52_Arduino.git - Restart the Arduino IDE
- Once the BSP is installed, select 'Adafruit Bluefruit nRF52 Feather' from the Tools -> Board menu, which will update your system config to use the right compiler and settings for the nRF52.
adafruit-nrfutil (derived from Nordic pc-nrfutil) is needed to upload sketch via serial port.
-
For Windows and macOS, pre-built executable binaries are included in the BSP at
tools/adafruit-nrfutil/. It should work out of the box. -
Linux user need to run follow command to install it from PyPi
$ pip3 install adafruit-nrfutil --user
- SiLabs CP2104 driver is required for USB to Serial when using with Feather nRF52832
This Arduino core contains basic BLE peripheral mode helper classes and an initial peripheral mode API. These helper classes and APIs aim to make it easier to work with the Nordic SoftDevice that contains Nordic's official Bluetooth Low Energy stack. You are also free to use the Nordic SDK to generate your own example code, since all of the SoftDevice header files are included in your projects by default.
To see a list of example sketches that make use of these helper classes, select the appropriate
board from the Tools > Board menu item, and then in the Examples menu look for the list of
examples sketched for the selected board.
Bluefruit's Bootloader is self-upgradable, you could upgrade to the latest Bootloader + Softdevice using the serial port within Arduino IDE.
- Select
Tools > Board > Adafruit Bluefruit Feather52 - Select
Tools > Programmer > Bootloader DFU for Bluefruit nRF52 - Select
Tools > Burn Bootloader - WAIT until the process complete ~30 seconds
Note: close the Serial Monitor before you click "Burn Bootloader". Afterwards, you shouldn't close the Arduino IDE, unplug the Feather, launch Serial Monitor etc ... to abort the process. There is a high chance it will brick your device! Do this with care and caution.
To burn the bootloader from within the Arduino IDE, you will need the following tools installed on your system and available in the system path:
Check to make sure you can run nrfjprog from your terminal/command prompt
macOS Note At present, you will need to create a symlink in /usr/local/bin to the
nrfjprog tool wherever you have added it. You can run the following command, for example:
$ ln -s $HOME/prog/nordic/nrfjprog/nrfjprog /usr/local/bin/nrfjprog
Once the tools above have been installed and added to your system path, from the Arduino IDE:
- Select
Tools > Board > Adafruit Bluefruit Feather52 - Select
Tools > Programmer > J-Link for Feather52 - Select
Tools > Burn Bootloaderwith the board and J-Link connected
If you wish to modify bootloader to your own need, check out its repo here Adafruit_nRF52_Bootloader
The bootloader hex file can be found at bin/bootloader run the command as follows:
$ nrfjprog -e -f nrf52
$ nrfjprog --program feather_nrf52832_bootloader.hex -f nrf52
$ nrfjprog --reset -f nrf52
If developing with the nRF52DK on macOS, there is a bug where only 64 bytes can be sent over the USB CDC interface, which will prevent you from using the serial bootloader from the Arduino IDE with an error like this:
Upgrading target on /dev/cu.usbmodem1421 with DFU package /private/var/folders/86/hb2vp14n5_5_yvdz_z8w9x_c0000gn/T/arduino_build_267869/nRF51Blinky.ino.zip. Flow control is disabled.
Timed out waiting for acknowledgement from device.
Failed to upgrade target. Error is: No data received on serial port. Not able to proceed.
Possible causes:
- bootloader, SoftDevice or application on target does not match the requirements in the DFU package.
- baud rate or flow control is not the same as in the target bootloader.
- target is not in DFU mode. If using the SDK examples, press Button 4 and RESET and release both to enter DFU mode.
To resolve this and enable 512 byte packets over USB serial, you must disable the Mass Storage Device interface on the JLink-OB, which will free up two of the 512 byte USB end points. (For details see this article.)
You can do so by running JLinkExe from the command line, and then entering the
MSDDisable command, and power cycling your nRF52DK. To re-enable MSD support, do the same
but enter the MSDEnable command.
This core is based on Arduino-nRF5 by Sandeep Mistry, which in turn is based on the Arduino SAMD Core.
The following libraries are used:
- adafruit-nrfutil is based on Nordic Semiconductor ASA's pc-nrfutil
- freeRTOS as operating system
- tinyusb as usb stack
- nrfx for peripherals driver
- littlefs for internal file system
- fatfs by elm-chan for external file system
- Segger Sysview for debugging.