https://github.com/fantasticdonkey/uFT6336U

MicroPython I2C driver for the Focus LCDs FT6336U capacitive touch panel controller IC.
https://github.com/fantasticdonkey/uFT6336U

Last synced: 3 months ago
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MicroPython I2C driver for the Focus LCDs FT6336U capacitive touch panel controller IC.

• Host: GitHub
• URL: https://github.com/fantasticdonkey/uFT6336U
• Owner: fantasticdonkey
• Created: 2021-02-12T18:32:59.000Z (over 3 years ago)
• Default Branch: master
• Last Pushed: 2021-02-21T22:10:56.000Z (over 3 years ago)
• Last Synced: 2024-04-22T13:31:29.224Z (7 months ago)
• Language: Python
• Size: 1.16 MB
• Stars: 4
• Watchers: 2
• Forks: 2
• Open Issues: 0
• Metadata Files:
  • Readme: readme.rst

Awesome Lists containing this project

• awesome-micropython - uFT6336U - MicroPython I2C driver for the Focus LCDs FT6336U capacitive touch panel controller IC. (Libraries / Sensors)

README

        
MicroPython I2C driver for the Focus LCDs FT6336U capacitive touch panel controller IC.

.. image:: docs/FT6336u.jpg

Basic usage

===============

The driver simply requires a MicroPython :code:`I2C` object to be instantiated. Refer to your development board's schematics to establish the correct I2C pins.

.. code-block:: python

    from machine import I2C, Pin

    I2C_SDA_PIN = const(21)

    I2C_SCL_PIN = const(22)

    I2C_FREQ = const(400000)

    i2c_bus = I2C(sda=Pin(I2C_SDA_PIN), scl=Pin(I2C_SCL_PIN), freq=I2C_FREQ)

The FT6336U driver can then be instantiated using the :code:`I2C` object. For the simplest operation, use the :code:`touch.get_positions()` method to return the X and Y coordinates of the registered point(s). This will return a maximum of two points. If the device cannot be found, make sure that the IC is powered (for example, if it is connected to a separate power management chip).

.. code-block:: python

    import uFT6336U

    touch = uFT6336U.FT6336U(i2c_bus)

    touch.get_positions()

.. image:: docs/get_positions.png

Use with interrupt

====================

For best results, use the driver with the designated interrupt pin. This way, discreet code can be triggered based on newly registered points.

.. code-block:: python

    INTERRUPT_PIN = const(39)

    def handle_interrupt(pin):

        num_points = touch.get_points()

        if num_points > 0:

            print(touch.get_p1_x(), touch.get_p1_y())

        if num_points == 2:

            print(touch.get_p2_x(), touch.get_p2_y())

    pir = Pin(INTERRUPT_PIN, Pin.IN)

    pir.irq(trigger=Pin.IRQ_RISING, handler=handle_interrupt)

.. image:: docs/get_positions_irq.png

Further reading

===================

* `FT6336U datasheet `_