91 lines
3.1 KiB
Markdown
91 lines
3.1 KiB
Markdown
Watch Application System in Python
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==================================
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Introduction
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------------
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Currently in its infancy wasp-os provides nothing more than a simple
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digital clock application for [PineTime](https://www.pine64.org/pinetime/)
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together with access to the MicroPython REPL for interactive testing and
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tweaking. However it keeps time well and has enough power saving
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functions implemented that it can survive for well over 24 hours between
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charges so even at this early stage it is functional as a wearable
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timepiece.
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WASP includes a robust bootloader based on the Adafruit NRF52
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Bootloader. It has been extended to make it robust for development on
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form-factor devices without a reset button, power switch, SWD debugger
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or UART. This allows us to confidently develop on sealed devices relying
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only on BLE for updates.
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Video
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-----
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[](https://www.youtube.com/watch?v=W0CmqOnl4jk)
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Building from a git clone
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-------------------------
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~~~
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pip3 install --user click serial pyserial
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make submodules
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make softdevice
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make -j `nproc` BOARD=pinetime all
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~~~
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Note: *You will need a toolchain for the Arm Cortex-M4. wasp-os is developed and tested using the [GNU-RM toolchain](https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/gnu-rm) (9-2019-q4) from Arm.*
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Note #2: *There are known problems with toolchains older than gcc-7.3 due to problems with link-time-optimization (which is enabled by default)*
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Installing
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----------
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Note: *If you have a new PineTime then it will have been delivered with
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flash protection enabled. You must disable the flash protection before
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trying to program it.*
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* Use an SWD programmer to install `bootloader.hex` to the PineTime.
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This file is an Intel HEX file containing both the bootloader and
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the Nordic SoftDevice. Be careful to disconnect cleanly from the
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debug software since just pulling out the SWD cable will mean the
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nRF52 will still believe it is being debugged.
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* Copy `micropython.zip` to your Android device and download nRF Connect
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for Android if you do not already have it.
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* In nRF Connect, choose settings and reduce the DFU packet count from
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10 to 4.
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* Connect to PineDFU using nRFConnect, click the DFU button and send
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`micropython.zip` to the device.
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At the end of this process your watch will show the time (12:00) and a
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battery meter. When the watch goes into power saving mode you can use
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the side button to wake it again.
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At this point you will also be able to use the Nordic UART Service to
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access the MicroPython REPL, although currently you must send ^C to
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interrupt the program that updates the watch display.
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Just for fun try:
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~~~
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^C
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import demo
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demo.run()
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# After watching the demo for a bit...
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^C
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wasp.app.draw(watch)
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wasp.run()
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~~~
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To set the time and restart the main application:
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~~~
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^C
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watch.rtc.set_time((hh, mm, ss))
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wasp.run()
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~~~
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As mentioned above there are many drivers and features still to be
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developed, see the [TODO list](TODO.md) for current status.
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