Added ST7789 Display Support

Author: Melissa LeBlanc-Williams

adafruit_rgb_display/rgb.py

@@ -80,6 +80,8 @@ class Display: #pylint: disable-msg=no-member
     _COLUMN_SET = None
     _RAM_WRITE = None
     _RAM_READ = None
+    _X_START = 0
+    _Y_START = 0
     _INIT = ()
     _ENCODE_PIXEL = ">H"
     _ENCODE_POS = ">HH"
@@ -98,8 +100,8 @@ def init(self):
     #pylint: disable-msg=invalid-name,too-many-arguments
     def _block(self, x0, y0, x1, y1, data=None):
         """Read or write a block of data."""
-        self.write(self._COLUMN_SET, self._encode_pos(x0, x1))
-        self.write(self._PAGE_SET, self._encode_pos(y0, y1))
+        self.write(self._COLUMN_SET, self._encode_pos(x0 + self._X_START, x1 + self._X_START))
+        self.write(self._PAGE_SET, self._encode_pos(y0 + self._Y_START, y1 + self._Y_START))
         if data is None:
             size = struct.calcsize(self._DECODE_PIXEL)
             return self.read(self._RAM_READ,

adafruit_rgb_display/st7789.py

@@ -0,0 +1,133 @@
+# The MIT License (MIT)
+#
+# Copyright (c) 2019 Melissa LeBlanc-Williams for Adafruit Industries
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+# THE SOFTWARE.
+"""
+`adafruit_rgb_display.st7789`
+====================================================
+
+A simple driver for the ST7789-based displays.
+
+* Author(s): Melissa LeBlanc-Williams
+"""
+
+try:
+    import struct
+except ImportError:
+    import ustruct as struct
+from micropython import const
+from adafruit_rgb_display.rgb import DisplaySPI
+
+__version__ = "0.0.0-auto.0"
+__repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_RGB_Display.git"
+
+_NOP = const(0x00)
+_SWRESET = const(0x01)
+_RDDID = const(0x04)
+_RDDST = const(0x09)
+
+_SLPIN = const(0x10)
+_SLPOUT = const(0x11)
+_PTLON = const(0x12)
+_NORON = const(0x13)
+
+_INVOFF = const(0x20)
+_INVON = const(0x21)
+_DISPOFF = const(0x28)
+_DISPON = const(0x29)
+_CASET = const(0x2A)
+_RASET = const(0x2B)
+_RAMWR = const(0x2C)
+_RAMRD = const(0x2E)
+
+_PTLAR = const(0x30)
+_COLMOD = const(0x3A)
+_MADCTL = const(0x36)
+
+_FRMCTR1 = const(0xB1)
+_FRMCTR2 = const(0xB2)
+_FRMCTR3 = const(0xB3)
+_INVCTR = const(0xB4)
+_DISSET5 = const(0xB6)
+
+_PWCTR1 = const(0xC0)
+_PWCTR2 = const(0xC1)
+_PWCTR3 = const(0xC2)
+_PWCTR4 = const(0xC3)
+_PWCTR5 = const(0xC4)
+_VMCTR1 = const(0xC5)
+
+_RDID1 = const(0xDA)
+_RDID2 = const(0xDB)
+_RDID3 = const(0xDC)
+_RDID4 = const(0xDD)
+
+_PWCTR6 = const(0xFC)
+
+_GMCTRP1 = const(0xE0)
+_GMCTRN1 = const(0xE1)
+
+
+class ST7789(DisplaySPI):
+    """
+    A simple driver for the ST7789-based displays.
+
+    >>> import busio
+    >>> import digitalio
+    >>> import board
+    >>> from adafruit_rgb_display import color565
+    >>> import adafruit_rgb_display.st7789 as st7789
+    >>> spi = busio.SPI(clock=board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+    >>> display = st7789.ST7789(spi, cs=digitalio.DigitalInOut(board.GPIO0),
+    ...    dc=digitalio.DigitalInOut(board.GPIO15), rst=digitalio.DigitalInOut(board.GPIO16))
+    >>> display.fill(0x7521)
+    >>> display.pixel(64, 64, 0)
+    """
+    _COLUMN_SET = _CASET
+    _PAGE_SET = _RASET
+    _RAM_WRITE = _RAMWR
+    _RAM_READ = _RAMRD
+    _Y_START = 80
+    _INIT = (
+        (_SWRESET, None),
+        (_SLPOUT, None),
+        (_COLMOD, b'\x55'),  # 16bit color
+        (_MADCTL, b'\x08'),
+    )
+
+    #pylint: disable-msg=useless-super-delegation, too-many-arguments
+    def __init__(self, spi, dc, cs, rst=None, width=240, height=240,
+                 baudrate=16000000, polarity=0, phase=0):
+        super().__init__(spi, dc, cs, rst, width, height,
+                         baudrate=baudrate, polarity=polarity, phase=phase)
+
+    def init(self):
+        super().init()
+        cols = struct.pack('>HH', 0, self.width)
+        rows = struct.pack('>HH', self._Y_START, self.height + self._Y_START)
+        for command, data in (
+                (_CASET, cols),
+                (_RASET, rows),
+                (_INVON, None),
+                (_NORON, None),
+                (_DISPON, None),
+                (_MADCTL, b'\xc0'), #Set rotation to 0 and use RGB
+        ):
+            self.write(command, data)