| Nordic nRF boards (``microbit``) |
| ================================ |
| |
| The `Nordic nRF`_ chips are a family of ARM-based System-on-Chip that |
| are designed to be used for low-power and short-range wireless solutions. |
| |
| .. _Nordic nRF: https://www.nordicsemi.com/Products |
| |
| The nRF51 series is the first series for short range wireless applications. |
| It is superseded by the nRF52 series. |
| The following machines are based on this chip : |
| |
| - ``microbit`` BBC micro:bit board with nRF51822 SoC |
| |
| There are other series such as nRF52, nRF53 and nRF91 which are currently not |
| supported by QEMU. |
| |
| Supported devices |
| ----------------- |
| |
| * ARM Cortex-M0 (ARMv6-M) |
| * Serial ports (UART) |
| * Clock controller |
| * Timers |
| * Random Number Generator (RNG) |
| * GPIO controller |
| * NVMC |
| * SWI |
| |
| Missing devices |
| --------------- |
| |
| * Watchdog |
| * Real-Time Clock (RTC) controller |
| * TWI (i2c) |
| * SPI controller |
| * Analog to Digital Converter (ADC) |
| * Quadrature decoder |
| * Radio |
| |
| Boot options |
| ------------ |
| |
| The Micro:bit machine can be started using the ``-device`` option to load a |
| firmware in `ihex format`_. Example: |
| |
| .. _ihex format: https://en.wikipedia.org/wiki/Intel_HEX |
| |
| .. code-block:: bash |
| |
| $ qemu-system-arm -M microbit -device loader,file=test.hex |
