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esphome-docs/components/display/st7701s.rst
Clyde Stubbs d2af542012
Add st7701s and rpi_dpi_rgb docs (#3546) 
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
2024-03-12 11:45:57 +13:00

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ST7701S Display Driver
======================
.. seo::
:description: Instructions for setting up ST7701S 16 bit "RGB" parallel displays
:image: indicator.jpg
.. _st7701s:
Models
------
This display driver supports displays with 16 bit parallel interfaces, often referred to as "RGB". It currently
supports the ST7701S chip.
This driver has been tested with the following displays:
- Seeed Sensecap Indicator
- Makerfabs 4" display
Usage
-----
This component requires an ESP32 (usually an ESP32-S3 because of the number of GPIO pins required) and the use of
ESP-IDF. PSRAM is a requirement due to the size of the display buffer.
.. figure:: images/indicator.jpg
:align: center
:width: 75.0%
Sensecap Indicator display
.. code-block:: yaml
# Example minimal configuration entry
display:
- platform: st7701s
dimensions:
width: 480
height: 480
cs_pin: REPLACE_ME
reset_pin: REPLACE_ME
de_pin: REPLACE_ME
hsync_pin: REPLACE_ME
vsync_pin: REPLACE_ME
pclk_pin: REPLACE_ME
# Replace XX with the correct pin number
data_pins:
red:
- XX #r1
- XX #r2
- XX #r3
- XX #r4
- XX #r5
green:
- XX #g0
- XX #g1
- XX #g2
- XX #g3
- XX #g4
- XX #g5
blue:
- XX #b1
- XX #b2
- XX #b3
- XX #b4
- XX #b5
Configuration variables:
************************
- **init_sequence** (*Optional*, A list of byte arrays): Specifies the init sequence for the display
- **data_pins** (**Required**): A list of pins used for the databus. Specified in 3 groups.
- **red**: (**Required**, :ref:`Pin Schema <config-pin_schema>`) Exactly 5 pin numbers for the red databits, listed from least to most significant bit.
- **green**: (**Required**, :ref:`Pin Schema <config-pin_schema>`) Exactly 6 pin numbers for the green databits, listed from least to most significant bit.
- **blue**: (**Required**, :ref:`Pin Schema <config-pin_schema>`) Exactly 5 pin numbers for the blue databits, listed from least to most significant bit.
- **de_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The DE pin.
- **dc_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The DC pin.
- **pclk_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The PCLK pin.
- **hsync_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The Horizontal sync pin.
- **vsync_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The Vertical sync pin.
- **reset_pin** (*Optional*, :ref:`Pin Schema <config-pin_schema>`): The RESET pin.
- **hsync_pulse_width** (*Optional*, int): The horizontal sync pulse width.
- **hsync_front_porch** (*Optional*, int): The horizontal front porch length.
- **hsync_back_porch** (*Optional*, int): The horizontal back porch length.
- **vsync_pulse_width** (*Optional*, int): The vertical sync pulse width.
- **vsync_front_porch** (*Optional*, int): The vertical front porch length.
- **vsync_back_porch** (*Optional*, int): The vertical back porch length.
- **pclk_frequency** (*Optional*): Set the pixel clock speed. Default is 8MHz.
- **pclk_inverted** (*Optional* bool): If the pclk is active negative (default is True)
- **update_interval** (*Optional*, :ref:`config-time`): The interval to re-draw the screen. Defaults to ``5s``.
- **auto_clear_enabled** (*Optional*, boolean): Whether to automatically clear the display in each loop (''true'', default),
or to keep the existing display content (must overwrite explicitly, e.g., only on data change).
- **pages** (*Optional*, list): Show pages instead of a single lambda. See :ref:`display-pages`.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
- **color_order** (*Optional*): Should be one of ``bgr`` (default) or ``rgb``.
- **dimensions** (**Required**): Dimensions of the screen, specified either as *width* **x** *height* (e.g ``320x240``) or with separate config keys.
- **height** (**Required**, int): Specifies height of display in pixels.
- **width** (**Required**, int): Specifies width of display.
- **offset_width** (*Optional*, int): Specify an offset for the x-direction of the display, typically used when an LCD is smaller than the maximum supported by the driver chip. Default is 0
- **offset_height** (*Optional*, int): Specify an offset for the y-direction of the display. Default is 0.
- **data_rate** (*Optional*): Set the data rate of the SPI interface to the display. One of ``80MHz``, ``40MHz``,
``20MHz``, ``10MHz``, ``5MHz``, ``2MHz``, ``1MHz`` (default), ``200kHz``, ``75kHz`` or ``1kHz``.
- **spi_mode** (*Optional*): Set the mode for the SPI interface to the display. Default is ``MODE0`` but some displays require ``MODE3``.
- **invert_colors** (*Optional*): With this boolean option you can invert the display colors. **Note** some of the displays have this option set automatically to true and can't be changed.
- **rotation** (*Optional*): Rotate the display presentation in software. Choose one of ``0°``, ``90°``, ``180°``, or ``270°``. This option cannot be used with ``transform``.
- **transform** (*Optional*): Transform the display presentation using hardware. All defaults are ``false``. This option cannot be used with ``rotation``.
- **swap_xy** (*Optional*, boolean): If true, exchange the x and y axes.
- **mirror_x** (*Optional*, boolean): If true, mirror the x axis.
- **mirror_y** (*Optional*, boolean): If true, mirror the y axis.
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the display.
See :ref:`display-engine` for more information.
**Note:** To rotate the display in hardware use one of the following combinations:
- 90 degrees - use ``swap_xy`` with ``mirror_x``
- 180 degrees - use ``mirror_x`` with ``mirror_y``
- 270 degrees - use ``swap_xy`` with ``mirror_y``
The horizontal and vertical ``pulse_width``, ``front_porch`` and ``back_porch`` values are optional, but may require
changing for a specific display. Refer to the manufacturer's sample code for suitable values. These specify timing
requirements for the display.
The ``init_sequence`` requires a list of elements, one of which may be a single integer selecting a canned init
sequence (the default and currently the only sequence is 1), the remainder must be byte arrays providing additional
init commands, each consisting of a command byte followed by zero or more data bytes.
These will be collected and sent to the display via SPI during initialisation.
Example configurations
----------------------
Seeed Sensecap Indicator
************************
.. code-block:: yaml
display:
- platform: st7701s
auto_clear_enabled: false
update_interval: never
spi_mode: MODE3
color_order: RGB
dimensions:
width: 480
height: 480
invert_colors: true
transform:
mirror_x: true
mirror_y: true
cs_pin:
pca9554: p_c_a
number: 4
reset_pin:
pca9554: p_c_a
number: 5
de_pin: 18
hsync_pin: 16
vsync_pin: 17
pclk_pin: 21
init_sequence:
- 1 # select canned init sequence number 1
- [ 0xE0, 0x1F ] # Set sunlight readable enhancement
data_pins:
red:
- 4 #r1
- 3 #r2
- 2 #r3
- 1 #r4
- 0 #r5
green:
- 10 #g0
- 9 #g1
- 8 #g2
- 7 #g3
- 6 #g4
- 5 #g5
blue:
- 15 #b1
- 14 #b2
- 13 #b3
- 12 #b4
- 11 #b5
lambda: |-
it.fill(COLOR_BLACK);
it.print(0, 0, id(my_font), id(my_red), TextAlign::TOP_LEFT, "Hello World!");
See Also
--------
- :doc:`index`
- :apiref:`st7701s/st7701s.h`
- :ghedit:`Edit`
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