micro:bit V2

Board Overview

micro:bit V2

Name:

bbc_microbit_v2

Vendor:

BBC

Architecture:

arm

SoC:

nrf52833

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Overview

The Micro Bit (also referred to as BBC Micro Bit, stylized as micro:bit) is an ARM-based embedded system designed by the BBC for use in computer education in the UK.

The board is 4 cm × 5 cm and has an ARM Cortex-M4F processor, accelerometer and magnetometer sensors, Bluetooth and USB connectivity, a display consisting of 25 LEDs, a microphone, two programmable buttons, and can be powered by either USB or an external battery pack. The device inputs and outputs are through five ring connectors that are part of the 23-pin edge connector.

More information about the board can be found at the microbit website [1].

Hardware

The micro:bit-v2 has the following physical features:

• 25 individually-programmable LEDs

• 2 programmable buttons

• Microphone sensors

• Physical connection pins

• Light and temperature sensors

• Motion sensors (accelerometer and compass)

• Wireless Communication, via Radio and Bluetooth 5

• USB interface

Supported Features

The bbc_microbit_v2 board supports the hardware features listed below.

on-chip / on-board

Feature integrated in the SoC / present on the board.

2 / 2

Number of instances that are enabled / disabled.
Click on the label to see the first instance of this feature in the board/SoC DTS files.

vnd,foo

Compatible string for the Devicetree binding matching the feature.
Click on the link to view the binding documentation.

bbc_microbit_v2/nrf52833 target

Type	Location	Description	Compatible
CPU	on-chip	ARM Cortex-M4F CPU1	arm,cortex-m4f
ADC	on-chip	Nordic Semiconductor nRF family SAADC node1	nordic,nrf-saadc
ARM architecture	on-chip	Nordic UICR (User Information Configuration Registers)1	nordic,nrf-uicr
	on-chip	Nordic EGU (Event Generator Unit)6	nordic,nrf-egu
	on-chip	Nordic nRF family ACL (Access Control List)1	nordic,nrf-acl
	on-chip	Nordic nRF family MWU (Memory Watch Unit)1	nordic,nrf-mwu
Audio	on-chip	Nordic PDM (Pulse Density Modulation interface)1	nordic,nrf-pdm
Clock control	on-chip	Nordic nRF clock control node1	nordic,nrf-clock
Comparator	on-chip	Nordic nRF COMP (analog COMParator)1	nordic,nrf-comp
Counter	on-chip	Nordic nRF timer node5	nordic,nrf-timer
Cryptographic accelerator	on-chip	Nordic ECB (AES electronic codebook mode encryption)1	nordic,nrf-ecb
	on-chip	Nordic nRF family CCM (AES CCM mode encryption)1	nordic,nrf-ccm
Debug	on-chip	ARMv7 instrumentation trace macrocell1	arm,armv7m-itm
Display	on-board	Generic LED matrix driven by nRF SoC GPIOs1	nordic,nrf-led-matrix
Flash controller	on-chip	Nordic NVMC (Non-Volatile Memory Controller)1	nordic,nrf52-flash-controller
GPIO & Headers	on-chip	NRF5 GPIOTE1	nordic,nrf-gpiote
	on-chip	NRF5 GPIO2	nordic,nrf-gpio
	on-board	GPIO pins exposed on BBC MicroBit headers1	microbit,edge-connector
I2C	on-chip	Nordic nRF family TWIM (TWI master with EasyDMA)1 1	nordic,nrf-twim
I2S	on-chip	Nordic I2S (Inter-IC sound interface)1	nordic,nrf-i2s
IEEE 802.15.4	on-chip	Nordic nRF IEEE 802.15.4 node1	nordic,nrf-ieee802154
Input	on-board	Group of GPIO-bound input keys1	gpio-keys
Interrupt controller	on-chip	ARMv7-M NVIC (Nested Vectored Interrupt Controller)1	arm,v7m-nvic
Miscellaneous	on-chip	Nordic FICR (Factory Information Configuration Registers)1	nordic,nrf-ficr
	on-chip	Nordic nRF family PPI (Programmable Peripheral Interconnect)1	nordic,nrf-ppi
MTD	on-chip	Flash node1	soc-nv-flash
	on-board	Fixed partitions of a flash (or other non-volatile storage) memory1	fixed-partitions
Networking	on-chip	Nordic nRF family RADIO peripheral1	nordic,nrf-radio
	on-chip	Nordic nRF family NFCT (Near Field Communication Tag)1	nordic,nrf-nfct
Pin control	on-chip	The nRF pin controller is a singleton node responsible for controlling pin function selection and pin properties1	nordic,nrf-pinctrl
Power management	on-chip	Nordic nRF power control node1	nordic,nrf-power
PWM	on-chip	nRF PWM1 3	nordic,nrf-pwm
	on-chip	nRFx S/W PWM1	nordic,nrf-sw-pwm
Regulator	on-chip	Nordic nRF5X regulator (fixed stage of the core supply)1	nordic,nrf5x-regulator
	on-chip	Nordic nRF52X regulator (high voltage stage of the main supply)1	nordic,nrf52x-regulator-hv
Retained memory	on-chip	Nordic GPREGRET (General Purpose Register Retention) device2	nordic,nrf-gpregret
RNG	on-chip	Nordic nRF family RNG (Random Number Generator)1	nordic,nrf-rng
RTC	on-chip	Nordic nRF RTC (Real-Time Counter)3	nordic,nrf-rtc
Sensors	on-board	STMicroelectronics LIS2MDL magnetometer accessed through I2C bus1	st,lis2mdl
	on-board	STMicroelectronics LIS2DH 3-axis accelerometer accessed through I2C bus1	st,lis2dh
	on-chip	Nordic nRF family TEMP node1	nordic,nrf-temp
	on-chip	Nordic nRF quadrature decoder (QDEC) node1	nordic,nrf-qdec
Serial controller	on-chip	Nordic nRF family UART1	nordic,nrf-uart
	on-chip	Nordic nRF family UARTE (UART with EasyDMA)1	nordic,nrf-uarte
SPI	on-chip	Nordic nRF family SPIM (SPI master with EasyDMA)4	nordic,nrf-spim
SRAM	on-chip	Generic on-chip SRAM description1	mmio-sram
Timer	on-chip	ARMv7-M System Tick1	arm,armv7m-systick
USB	on-chip	Nordic nRF52 USB device controller1	nordic,nrf-usbd
Watchdog	on-chip	Nordic nRF family WDT (Watchdog Timer)1	nordic,nrf-wdt

Programming and Debugging

Flashing

Build and flash applications as usual (see Building an Application and Run an Application for more details).

Here is an example for the Hello World application.

First, run your favorite terminal program to listen for output.

$ minicom -D <tty_device> -b 115200

Replace <tty_device> with the port where the micro:bit board can be found. For example, under Linux, /dev/ttyACM0.

Then build and flash the application in the usual way.

# From the root of the zephyr repository
west build -b bbc_microbit_v2 samples/hello_world
west flash

References

[1]

http://www.microbit.org/