st7735 Docs (#608)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

components/display/st7735.rst

@@ -0,0 +1,81 @@
+ST7735 Display
+==============
+
+.. seo::
+    :description: Instructions for setting up a ST7735 display drivers.
+    :keywords: ST7735
+    :image: ST7735.png
+
+ST7735 Display Driver. 
+
+Usage
+-----
+
+The ST7735 component allows you to use a ST7735 display
+(`datasheet and information <https://learn.adafruit.com/1-8-tft-display/downloads>`__,
+`Adafruit <https://www.adafruit.com/product/358>`__) in ESPHome.
+It uses the :ref:`SPI Bus <spi>` for communication.
+
+.. figure:: images/st7735.jpg
+    :align: center
+    :width: 75.0%
+
+    ST7735 Display
+
+There are numerous board types out there. Some initialize differently as well. This driver will take a few options to narrow down the right settings.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    display:
+    - platform: st7735
+      model: "INITR_18BLACKTAB"
+      reset_pin: D4
+      cs_pin: D1
+      dc_pin: D2      
+      rotation: 0
+      devicewidth: 128
+      deviceheight: 160
+      colstart: 0
+      rowstart: 0
+      eightbitcolor: true
+      update_interval: 5s
+
+Configuration variables:
+~~~~~~~~~~~~~~~~~~~~~~~~
+
+- **model** (**Required**, "See Models Below"): This the model to use. INITR_BLACKTAB is the default
+- **reset_pin** (:ref:`Pin Schema <config-pin_schema>`): The RESET pin.
+- **cs_pin** (:ref:`Pin Schema <config-pin_schema>`): The CS pin.
+- **dc_pin** (:ref:`Pin Schema <config-pin_schema>`): The DC pin.
+- **devicewidth** (**Required**, int): The device width. 128 is default
+- **deviceheight** (**Required**, int): The device height. 160 is default
+- **colstart** (**Required**, int): The device height. 160 is default
+- **rowstart** (**Required**, int): The device height. 160 is default
+- **eightbitcolor** (*Optional*, "True/False" ): 8bit mode. Default is False. This saves 50% of the buffer required for the display. 
+
+Memory notes:
+~~~~~~~~~~~~~
+
+- 8Bit color saves 50% of the buffer required.
+- eightbitcolor: True 160x128 = 20480 *Important for memory constrained devices*
+- eightbitcolor: False 160x128x2 = 40960 
+
+
+Models:
+~~~~~~~
+
+- INITR_GREENTAB
+- INITR_REDTAB
+- INITR_BLACKTAB
+- INITR_MIN_I160X80
+- INITR_18BLACKTAB
+- INITR_18REDTAB
+
+
+See Also
+--------
+
+- :ref:`spi`
+- :apiref:`st7735/st7735.h`
+- :ghedit:`Edit`

index.rst

@@ -286,6 +286,7 @@ Display Components
     SSD1327, components/display/ssd1327, ssd1327.jpg
     SSD1331, components/display/ssd1331, ssd1331.jpg
     SSD1351, components/display/ssd1351, ssd1351.jpg
+    ST7735, components/display/st7735, st7735.jpg
     ST7789V, components/display/st7789v, st7789v.jpg
     ILI9341, components/display/ili9341, ili9341.jpg
     Waveshare E-Paper, components/display/waveshare_epaper, waveshare_epaper.jpg