1  # The MIT License (MIT)
 2  #
 3  # Copyright (c) 2019 Scott Shawcroft and Melissa LeBlanc-Williams
 4  #                    for Adafruit Industries LLC
 5  #
 6  # Permission is hereby granted, free of charge, to any person obtaining a copy
 7  # of this software and associated documentation files (the "Software"), to deal
 8  # in the Software without restriction, including without limitation the rights
 9  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10  # copies of the Software, and to permit persons to whom the Software is
11  # furnished to do so, subject to the following conditions:
12  #
13  # The above copyright notice and this permission notice shall be included in
14  # all copies or substantial portions of the Software.
15  #
16  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
22  # THE SOFTWARE.
23  """
24  `adafruit_st7735`
25  ====================================================
26  
27  Displayio driver for ST7735 based displays.
28  
29  * Author(s): Melissa LeBlanc-Williams
30  
31  Implementation Notes
32  --------------------
33  
34  **Hardware:**
35  
36  **Software and Dependencies:**
37  
38  * Adafruit CircuitPython firmware for the supported boards:
39    https://github.com/adafruit/circuitpython/releases
40  
41  """
42  
43  import displayio
44  
45  __version__ = "0.0.0-auto.0"
46  __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_ST7735.git"
47  
48  _INIT_SEQUENCE = (
49      b"\x01\x80\x32"  # _SWRESET and Delay 50ms
50      b"\x11\x80\xFF"  # _SLPOUT
51      b"\x3A\x81\x05\x0A"  # _COLMOD
52      b"\xB1\x83\x00\x06\x03\x0A"  # _FRMCTR1
53      b"\x36\x01\x08"  # _MADCTL
54      b"\xB6\x02\x15\x02"  # _DISSET5
55      # 1 clk cycle nonoverlap, 2 cycle gate, rise, 3 cycle osc equalize, Fix on VTL
56      b"\xB4\x01\x00"  # _INVCTR line inversion
57      b"\xC0\x82\x02\x70\x0A"  # _PWCTR1 GVDD = 4.7V, 1.0uA, 10 ms delay
58      b"\xC1\x01\x05"  # _PWCTR2 VGH = 14.7V, VGL = -7.35V
59      b"\xC2\x02\x01\x02"  # _PWCTR3 Opamp current small, Boost frequency
60      b"\xC5\x82\x3C\x38\x0A"  # _VMCTR1
61      b"\xFC\x02\x11\x15"  # _PWCTR6
62      b"\xE0\x10\x09\x16\x09\x20\x21\x1B\x13\x19\x17\x15\x1E\x2B\x04\x05\x02\x0E"  # _GMCTRP1 Gamma
63      b"\xE1\x90\x0B\x14\x08\x1E\x22\x1D\x18\x1E\x1B\x1A\x24\x2B\x06\x06\x02\x0F\x0A"  # _GMCTRN1
64      b"\x13\x80\x0a"  # _NORON
65      b"\x29\x80\xFF"  # _DISPON
66  )
67  
68  # pylint: disable=too-few-public-methods
69  class ST7735(displayio.Display):
70      """ST7735 driver"""
71  
72      def __init__(self, bus, **kwargs):
73          super().__init__(bus, _INIT_SEQUENCE, **kwargs)