1Nordic nRF boards (``microbit``) 2================================ 3 4The `Nordic nRF`_ chips are a family of ARM-based System-on-Chip that 5are designed to be used for low-power and short-range wireless solutions. 6 7.. _Nordic nRF: https://www.nordicsemi.com/Products 8 9The nRF51 series is the first series for short range wireless applications. 10It is superseded by the nRF52 series. 11The following machines are based on this chip : 12 13- ``microbit`` BBC micro:bit board with nRF51822 SoC 14 15There are other series such as nRF52, nRF53 and nRF91 which are currently not 16supported by QEMU. 17 18Supported devices 19----------------- 20 21 * ARM Cortex-M0 (ARMv6-M) 22 * Serial ports (UART) 23 * Clock controller 24 * Timers 25 * Random Number Generator (RNG) 26 * GPIO controller 27 * NVMC 28 * SWI 29 30Missing devices 31--------------- 32 33 * Watchdog 34 * Real-Time Clock (RTC) controller 35 * TWI (i2c) 36 * SPI controller 37 * Analog to Digital Converter (ADC) 38 * Quadrature decoder 39 * Radio 40 41Boot options 42------------ 43 44The Micro:bit machine can be started using the ``-device`` option to load a 45firmware in `ihex format`_. Example: 46 47.. _ihex format: https://en.wikipedia.org/wiki/Intel_HEX 48 49.. code-block:: bash 50 51 $ qemu-system-arm -M microbit -device loader,file=test.hex 52