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https://github.com/heerkog/micropythontrill

Trill touch sensor library for MicroPython.
https://github.com/heerkog/micropythontrill
bela micropython sensor trill
Last synced: about 21 hours ago
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Trill touch sensor library for MicroPython.
Host: GitHub
URL: https://github.com/heerkog/micropythontrill
Owner: Heerkog
License: gpl-3.0
Created: 2021-10-09T12:00:32.000Z (about 3 years ago)
Default Branch: master
Last Pushed: 2021-10-25T13:48:32.000Z (about 3 years ago)
Last Synced: 2024-04-22T13:31:29.404Z (8 months ago)
Topics: bela, micropython, sensor, trill
Language: Python
Homepage:
Size: 37.1 KB
Stars: 1
Watchers: 1
Forks: 1
Open Issues: 0
Metadata Files:
- Readme: README.md
- License: LICENSE
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README

        


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MicroPython Trill Sensor Library


  


    This library offers implementations of Bela's Trill touch sensors for MicroPython.

  



  Table of Contents

  


    About The Project

    Getting Started

    Usage

    Contributing

    License

    Contact

    Acknowledgments

  


## About The Project

This library offers implementations of [Bela](https://bela.io/) 's [Trill touch sensors](https://bela.io/products/trill/) for MicroPython.

The library has been tested using an ESP32 development board ([TinyPICO](https://tinypico.com)).

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## Getting Started

To get a local copy simply clone this repository.

   ```sh

   git clone https://github.com/heerkog/MicroPythonTrill.git

   ```

The repository is structured as followed:

* `LICENSE` the license.

* `readme.md`

* `touch.py` touch helper classes.

* `trill.py` the library classes.

Example implementation:

```

from machine import SoftI2C, Pin

from trill import Square

from touch import Touches2D

i2c = SoftI2C(scl=Pin(I2C_SCL), sda=Pin(I2C_SDA), freq=400000)

square = Square(i2c)

data = square.read()

touches = Touches2D(data)

for touch in touches.getTouches():

    print(touch)

```

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## Usage

The library consists of two python files with the following classes:

The file `trill.py` consists of the following six classes with functions:

* `TrillSensor` The generic Trill sensor representation, with functions:

  * `__init__(i2c, address, mode, sleep=10)` Initializes a generic Trill sensor using the I²C bus `i2c`, the I²C address `address`, the mode `mode`, and a sleep time between I²C commands of `10` ms.

  * `identify()` Ask the sensor to identify itself and read its type and firmware version.

  * `get_type()` Get the sensor type.

  * `get_firmware_version()` Get the sensor firmware version.

  * `get_size()` Get the size of the sensor as a tuple (x, y).

  * `get_num_channels()` Get the number of channels of the sensor.

  * `read()` Read the latest scan value from the sensor.

  * `set_mode(mode)` Set the sensor mode, as either `trill.MODE_CENTROID`, `trill.MODE_RAW`, `trill.MODE_BASELINE`, or `trill.MODE_DIFF`.

  * `get_mode()` Get the sensor mode. Returns `None` if mode hasn't been set.

  * `set_scan_settings(speed=0, resolution=12)` Set the scan speed and resolution (numBits) of the sensor, with speed being a value from 0 to 3, and resolution being a value from 9 to 16.body

  * `update_baseline()` Update the baseline capacitance values of the sensor.

  * `set_prescaler(prescaler=8)` Set the prescaler of the sensor, with prescaler being a value from 1 to 8.

  * `set_noise_threshold(threshold)` Set the noise threshold for the `trill.MODE_CENTROID` and `trill.MODE_DIFF` modes, with threshold being a value from 0 to 255.

  * `set_IDAC_value(value)` Set the IDAC value of the sensor, with value being a value from 0 to 255.

  * `set_minimum_touch_size(self, minSize)` Set the minimum registered touch size.

  * `set_auto_scan_interval(interval=1)` Set the automatic scan interval (used with the EVT pin).

  * `is_1D()` Returns `True` if the sensor is one-directional.

  * `is_2D()` Returns `True` if the sensor is two-directional.

* `Bar` Subclass of `TrillSensor`, implements a Trill Bar sensor.

  * `__init__(i2c, address=0x20, mode=MODE_CENTROID, sleep=10)` Initializes a Trill Bar sensor using the I²C bus `i2c`, the I²C address `0x20`, the mode `trill.MODE_CENTROID`, and a sleep time between I²C commands of `10` ms.

* `Square` Subclass of `TrillSensor`, implements a Trill Square sensor.

  * `__init__(i2c, address=0x28, mode=MODE_CENTROID, sleep=10)` Initializes a Trill Square sensor using the I²C bus `i2c`, the I²C address `0x28`, the mode `trill.MODE_CENTROID`, and a sleep time between I²C commands of `10` ms.

* `Craft` Subclass of `TrillSensor`, implements a Trill Craft sensor.

  * `__init__(i2c, address=0x30, mode=MODE_CENTROID, sleep=10)` Initializes a Trill Bar sensor using the I²C bus `i2c`, the I²C address `0x30`, the mode `trill.MODE_CENTROID`, and a sleep time between I²C commands of `10` ms.

* `Ring` Subclass of `TrillSensor`, implements a Trill Ring sensor.

  * `__init__(i2c, address=0x38, mode=MODE_CENTROID, sleep=10)` Initializes a Trill Bar sensor using the I²C bus `i2c`, the I²C address `0x38`, the mode `trill.MODE_CENTROID`, and a sleep time between I²C commands of `10` ms.

* `Hex` Subclass of `TrillSensor`, implements a Trill Hex sensor.

  * `__init__(i2c, address=0x40, mode=MODE_CENTROID, sleep=10)` Initializes a Trill Bar sensor using the I²C bus `i2c`, the I²C address `0x40`, the mode `trill.MODE_CENTROID`, and a sleep time between I²C commands of `10` ms.

The file `touch.py` consists of the following three classes with functions:

* `Touches` Implements a helper class to obtain Trill sensor touches from `trill.MODE_CENTROID` data.

  * `__init__(data)` Converts data read using `trill.MODE_CENTROID` to a list of touches

  * `get_touches()` Returns a list of touches as tuples.

  * `get_num_touches()` Returns the number of touches registered.

  * `get_touch(index)` Returns the touch at `index` as a tuple.

  * `is_empty()` Returns `True` if no touches are registered.

* `Touches1D` Subclass of `Touches`, interprets `trill.MODE_CENTROID` data from one-directional sensors.

  * `__init__(data)` Converts one-directional data read using MODE_CENTROID to a list of touches

  * `get_touches()` Returns a list of touches as tuples `[(vertical position, touch size), ...]`.

  * `get_touch(index)` Returns the touch at `index` as a tuple `(vertical position, touch size)`.

* `Touches2D` Subclass of `Touches`, interprets `trill.MODE_CENTROID` data from two-directional sensors.

  * `__init__(data)` Converts two-directional data read using MODE_CENTROID to a list of touches

  * `get_touches()` Returns a list of touches as tuples `[(horizontal position, vertical position, horizontal size, vertical size), ...]`.

  * `get_touch(index)` Returns the touch at `index` as a tuple `(horizontal position, vertical position, horizontal size, vertical size)`.

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## Contributing

Contributions are what make the open source community such an amazing place to learn, inspire, and create. Any contributions you make are **greatly appreciated**.

If you have a suggestion that would make this better, please fork the repo and create a pull request. You can also simply open an issue with the tag "enhancement".

Don't forget to give the project a star! Thanks again!

1. Fork the Project

2. Create your Feature Branch (`git checkout -b feature/AmazingFeature`)

3. Commit your Changes (`git commit -m 'Add some AmazingFeature'`)

4. Push to the Branch (`git push origin feature/AmazingFeature`)

5. Open a Pull Request

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## License

Distributed under the GNU General Public License. See `LICENSE` for more information.

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## Contact

Heerko Groefsema - [@HeerkoG](https://twitter.com/heerkog) - [hgroefsema.nl](https://hgroefsema.nl)

Project Link: [https://github.com/heerkog/MicroPythonTrill](https://github.com/heerkog/MicroPythonTrill)

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## Acknowledgments

The following resources were of interest during development:

* [About Trill](https://learn.bela.io/products/trill/about-trill/)

* [Trill Arduino](https://github.com/BelaPlatform/Trill-Arduino)  

* [Mikes Pi Bakery](https://github.com/Grumpy-Mike/Mikes-Pi-Bakery)

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[contributors-shield]: https://img.shields.io/github/contributors/heerkog/MicroPythonTrill.svg?style=for-the-badge

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[forks-shield]: https://img.shields.io/github/forks/heerkog/MicroPythonTrill.svg?style=for-the-badge

[forks-url]: https://github.com/heerkog/MicroPythonTrill/network/members

[stars-shield]: https://img.shields.io/github/stars/heerkog/MicroPythonTrill.svg?style=for-the-badge

[stars-url]: https://github.com/heerkog/MicroPythonTrill/stargazers

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[issues-url]: https://github.com/heerkog/MicroPythonTrill/issues

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[license-url]: https://github.com/heerkog/MicroPythonTrill/blob/master/LICENSE.txt

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[website-url]: https://hgroefsema.nl