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90a76c6316
This adds the target guide for BBC Micro:bit. Information is taken from https://wiki.qemu.org/Features/MicroBit and from hw/arm/nrf51_soc.c. Signed-off-by: Alexandre Iooss <erdnaxe@crans.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Joel Stanley <joel@jms.id.au> Message-id: 20210621075625.540471-1-erdnaxe@crans.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
52 lines
1.2 KiB
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52 lines
1.2 KiB
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Nordic nRF boards (``microbit``)
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================================
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The `Nordic nRF`_ chips are a family of ARM-based System-on-Chip that
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are designed to be used for low-power and short-range wireless solutions.
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.. _Nordic nRF: https://www.nordicsemi.com/Products
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The nRF51 series is the first series for short range wireless applications.
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It is superseded by the nRF52 series.
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The following machines are based on this chip :
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- ``microbit`` BBC micro:bit board with nRF51822 SoC
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There are other series such as nRF52, nRF53 and nRF91 which are currently not
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supported by QEMU.
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Supported devices
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-----------------
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* ARM Cortex-M0 (ARMv6-M)
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* Serial ports (UART)
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* Clock controller
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* Timers
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* Random Number Generator (RNG)
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* GPIO controller
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* NVMC
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* SWI
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Missing devices
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---------------
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* Watchdog
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* Real-Time Clock (RTC) controller
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* TWI (i2c)
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* SPI controller
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* Analog to Digital Converter (ADC)
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* Quadrature decoder
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* Radio
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Boot options
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------------
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The Micro:bit machine can be started using the ``-device`` option to load a
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firmware in `ihex format`_. Example:
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.. _ihex format: https://en.wikipedia.org/wiki/Intel_HEX
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.. code-block:: bash
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$ qemu-system-arm -M microbit -device loader,file=test.hex
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