Added HX8357 Display Support

Author: Melissa LeBlanc-Williams

adafruit_rgb_display/hx8357.py

@@ -0,0 +1,106 @@
+# 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.hx8357`
+====================================================
+
+A simple driver for the HX8357-based displays.
+
+* Author(s): Melissa LeBlanc-Williams
+"""
+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"
+
+_SWRESET = const(0x01)
+_SLPOUT = const(0x11)
+_NORON = const(0x13)
+_INVOFF = const(0x20)
+_INVON = const(0x21)
+_DISPOFF = const(0x28)
+_DISPON = const(0x29)
+_CASET = const(0x2a)
+_PASET = const(0x2b)
+_RAMWR = const(0x2c)
+_RAMRD = const(0x2e)
+_TEON = const(0x35)
+_MADCTL = const(0x36)
+_COLMOD = const(0x3a)
+_TEARLINE = const(0x44)
+_SETOSC = const(0xb0)
+_SETPWR1 = const(0xb1)
+_SETRGB = const(0xb3)
+_SETCYC = const(0xb4)
+_SETCOM = const(0xb6)
+_SETC = const(0xb9)
+_SETSTBA = const(0xc0)
+_SETPANEL = const(0xcc)
+_SETGAMMA = const(0xe0)
+
+class HX8357(DisplaySPI):
+    """
+    A simple driver for the HX8357-based displays.
+
+    >>> import busio
+    >>> import digitalio
+    >>> import board
+    >>> from adafruit_rgb_display import color565
+    >>> import adafruit_rgb_display.hx8357 as hx8357
+    >>> spi = busio.SPI(clock=board.SCK, MOSI=board.MOSI, MISO=board.MISO)
+    >>> display = hx8357.HX8357(spi, cs=digitalio.DigitalInOut(board.GPIO0),
+    ...    dc=digitalio.DigitalInOut(board.GPIO15))
+    >>> display.fill(0x7521)
+    >>> display.pixel(64, 64, 0)
+    """
+    _COLUMN_SET = _CASET
+    _PAGE_SET = _PASET
+    _RAM_WRITE = _RAMWR
+    _RAM_READ = _RAMRD
+    _INIT = (
+        (_SWRESET, None),
+        (_SETC, b'\xFF\x83\x57'),
+        (_SETRGB, b'\x80\x00\x06\x06'), # 0x80 enables SDO pin (0x00 disables)
+        (_SETCOM, b'\x25'),             # -1.52V
+        (_SETOSC, b'\x68'),             # Normal mode 70Hz, Idle mode 55 Hz
+        (_SETPANEL, b'\x05'),           # BGR, Gate direction swapped
+        (_SETPWR1, b'\x00\x15\x1C\x1C\x83\xAA'), # Not deep standby BT VSPR VSNR AP
+        (_SETSTBA, b'\x50\x50\x01\x3C\x1E\x08'), # OPON normal OPON idle STBA GEN
+        (_SETCYC, b'\x02\x40\x00\x2A\x2A\x0D\x78'), # NW 0x02 RTN DIV DUM DUM GDON GDOFF
+        (_SETGAMMA, b'\x02\x0A\x11\x1d\x23\x35\x41\x4b\x4b\x42\x3A\x27\x1B\x08\x09\x03\x02\x0A\x11\x1d\x23\x35\x41\x4b\x4b\x42\x3A\x27\x1B\x08\x09\x03\x00\x01'),
+        (_COLMOD, b'\x55'),             # 16 bit
+        (_MADCTL, b'\xc0'),
+        (_TEON, b'\x00'),
+        (_TEARLINE, b'\x00\x02'),           # TW off
+        (_SLPOUT, None),
+        (_MADCTL, b'\xa0'),
+        (_DISPON, None),
+    )
+    _ENCODE_PIXEL = ">H"
+    _ENCODE_POS = ">HH"
+
+    #pylint: disable-msg=useless-super-delegation, too-many-arguments
+    def __init__(self, spi, dc, cs, rst=None, width=480, height=320,
+                 baudrate=16000000, polarity=0, phase=0):
+        super().__init__(spi, dc, cs, rst, width, height,
+                         baudrate=baudrate, polarity=polarity, phase=phase)

examples/rgbdisplay_hx8357test.py

@@ -0,0 +1,45 @@
+# Quick test of 3.5" TFT FeatherWing (HX8357) with Feather M0 or M4
+# This will work even on a device running displayio
+# Will fill the TFT black and put a red pixel in the center, wait 2 seconds,
+# then fill the screen blue (with no pixel), wait 2 seconds, and repeat.
+import time
+import random
+import digitalio
+import board
+import displayio
+
+from adafruit_rgb_display.rgb import color565
+import adafruit_rgb_display.hx8357 as hx8357
+
+displayio.release_displays()
+
+# Configuration for CS and DC pins (these are TFT FeatherWing defaults):
+cs_pin = digitalio.DigitalInOut(board.D9)
+dc_pin = digitalio.DigitalInOut(board.D10)
+
+# Config for display baudrate (default max is 24mhz):
+BAUDRATE = 24000000
+
+# Setup SPI bus using hardware SPI:
+spi = board.SPI()
+
+# Create the HX8357 display:
+display = hx8357.HX8357(spi, cs=cs_pin, dc=dc_pin, baudrate=BAUDRATE)
+
+# Main loop:
+while True:
+    # Fill the screen red, green, blue, then black:
+    for color in ((255, 0, 0), (0, 255, 0), (0, 0, 255)):
+        display.fill(color565(color))
+    # Clear the display
+    display.fill(0)
+    # Draw a red pixel in the center.
+    display.pixel(display.width//2, display.height//2, color565(255, 0, 0))
+    # Pause 2 seconds.
+    time.sleep(2)
+    # Clear the screen a random color
+    display.fill(color565(random.randint(0, 255),
+                          random.randint(0, 255),
+                          random.randint(0, 255)))
+    # Pause 2 seconds.
+    time.sleep(2)