Introduction

nonblockingtimer is a class to simplify the use of time.monotonic() when working with CircuitPython. It keeps track of the time interval bookkeeping so you can simply set a timer (or many), without using time.sleep(), and still respond to events when your timer(s) is/are sleeping.

Dependencies

This driver depends on:

• Adafruit CircuitPython

Please ensure all dependencies are available on the CircuitPython filesystem. This is easily achieved by downloading the Adafruit library and driver bundle.

Usage Example

class BlinkDemo(NonBlockingTimer):
    def __init__(self):
        super(BlinkDemo, self).__init__(0.1)
        self.led = digitalio.DigitalInOut(board.D13)
        self.led.direction = digitalio.Direction.OUTPUT
        self.value = True

    def stop(self):
        self.led.value = False

    def next(self):
        if (super(BlinkDemo, self).next()):
            self.led.value = not (self.led.value)

blinkdemo.BlinkDemo()

while True:
  blinkDemo.next()
  # This is the only place you should use time.sleep: to set the overall
  # "sampling rate" of your program.
  time.sleep(0.001)

Contributing

Contributions are welcome! Please read our Code of Conduct before contributing to help this project stay welcoming.

Building locally

Zip release files

To build this library locally you'll need to install the circuitpython-build-tools package.

python3 -m venv .env
source .env/bin/activate
pip install circuitpython-build-tools

Once installed, make sure you are in the virtual environment:

source .env/bin/activate

Then run the build:

circuitpython-build-bundles --filename_prefix circuitpython-nonblocking_timer --library_location .

Sphinx documentation

Sphinx is used to build the documentation based on rST files and comments in the code. First, install dependencies (feel free to reuse the virtual environment from above):

python3 -m venv .env
source .env/bin/activate
pip install Sphinx sphinx-rtd-theme

Now, once you have the virtual environment activated:

cd docs
sphinx-build -E -W -b html . _build/html

This will output the documentation to docs/_build/html. Open the index.html in your browser to view them. It will also (due to -W) error out on any warning like Travis will. This is a good way to locally verify it will pass