103 lines
3.1 KiB
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103 lines
3.1 KiB
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Introduction
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============
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.. image:: https://readthedocs.org/projects/adafruit-circuitpython-pioasm/badge/?version=latest
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:target: https://docs.circuitpython.org/projects/pioasm/en/latest/
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:alt: Documentation Status
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.. image:: https://raw.githubusercontent.com/adafruit/Adafruit_CircuitPython_Bundle/main/badges/adafruit_discord.svg
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:target: https://adafru.it/discord
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:alt: Discord
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.. image:: https://github.com/adafruit/Adafruit_CircuitPython_PIOASM/workflows/Build%20CI/badge.svg
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:target: https://github.com/adafruit/Adafruit_CircuitPython_PIOASM/actions
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:alt: Build Status
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.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
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:target: https://github.com/psf/black
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:alt: Code Style: Black
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Simple assembler to convert pioasm to bytes
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Dependencies
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=============
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This driver depends on:
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* `Adafruit CircuitPython <https://github.com/adafruit/circuitpython>`_
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Please ensure all dependencies are available on the CircuitPython filesystem.
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This is easily achieved by downloading
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`the Adafruit library and driver bundle <https://circuitpython.org/libraries>`_.
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Installing from PyPI
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=====================
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On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally `from
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PyPI <https://pypi.org/project/adafruit-circuitpython-pioasm/>`_. To install for current user:
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.. code-block:: shell
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pip3 install adafruit-circuitpython-pioasm
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To install system-wide (this may be required in some cases):
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.. code-block:: shell
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sudo pip3 install adafruit-circuitpython-pioasm
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To install in a virtual environment in your current project:
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.. code-block:: shell
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mkdir project-name && cd project-name
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python3 -m venv .venv
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source .venv/bin/activate
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pip3 install adafruit-circuitpython-pioasm
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CircuitPython Extensions
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========================
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* ``.fifo auto``: By default, CircuitPython joins the TX and RX fifos if a PIO program only receives or transmits. The ``.fifo auto`` directive makes this explicit.
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Usage Example
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=============
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.. code-block:: python
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import time
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import rp2pio
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import board
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import adafruit_pioasm
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squarewave = """
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.program squarewave
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set pins 1 [1] ; Drive pin high and then delay for one cycle
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set pins 0 ; Drive pin low
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"""
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assembled = adafruit_pioasm.assemble(squarewave)
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sm = rp2pio.StateMachine(
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assembled,
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frequency=2000,
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init=adafruit_pioasm.assemble("set pindirs 1"),
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first_set_pin=board.LED,
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)
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print("real frequency", sm.frequency)
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time.sleep(120)
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Documentation
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=============
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API documentation for this library can be found on `Read the Docs <https://docs.circuitpython.org/projects/pioasm/en/latest/>`_.
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For information on building library documentation, please check out `this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>`_.
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Contributing
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============
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Contributions are welcome! Please read our `Code of Conduct
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<https://github.com/adafruit/Adafruit_CircuitPython_PIOASM/blob/master/CODE_OF_CONDUCT.md>`_
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before contributing to help this project stay welcoming.
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