1  # The MIT License (MIT)
 2  #
 3  # Copyright (c) 2017 Dan Halbert
 4  #
 5  # Permission is hereby granted, free of charge, to any person obtaining a copy
 6  # of this software and associated documentation files (the "Software"), to deal
 7  # in the Software without restriction, including without limitation the rights
 8  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9  # copies of the Software, and to permit persons to whom the Software is
10  # furnished to do so, subject to the following conditions:
11  #
12  # The above copyright notice and this permission notice shall be included in
13  # all copies or substantial portions of the Software.
14  #
15  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
21  # THE SOFTWARE.
22  #
23  
24  """
25  `adafruit_max7219.matrices.Matrix8x8`
26  ====================================================
27  """
28  from micropython import const
29  from adafruit_max7219 import max7219
30  
31  __version__ = "0.0.0-auto.0"
32  __repo__ = "https://github.com/adafruit/Adafruit_CircuitPython_MAX7219.git"
33  
34  _DECODEMODE = const(9)
35  _SCANLIMIT = const(11)
36  _SHUTDOWN = const(12)
37  _DISPLAYTEST = const(15)
38  
39  
40  class Matrix8x8(max7219.MAX7219):
41      """
42      Driver for a 8x8 LED matrix based on the MAX7219 chip.
43  
44      :param object spi: an spi busio or spi bitbangio object
45      :param ~digitalio.DigitalInOut cs: digital in/out to use as chip select signal
46      """
47  
48      def __init__(self, spi, cs):
49          super().__init__(8, 8, spi, cs)
50  
51      def init_display(self):
52          for cmd, data in (
53              (_SHUTDOWN, 0),
54              (_DISPLAYTEST, 0),
55              (_SCANLIMIT, 7),
56              (_DECODEMODE, 0),
57              (_SHUTDOWN, 1),
58          ):
59              self.write_cmd(cmd, data)
60  
61          self.fill(0)
62          self.show()
63  
64      def text(self, strg, xpos, ypos, bit_value=1):
65          """
66          Draw text in the 8x8 matrix.
67  
68          :param int xpos: x position of LED in matrix
69          :param int ypos: y position of LED in matrix
70          :param string strg: string to place in to display
71          :param bit_value: > 1 sets the text, otherwise resets
72          """
73          self.framebuf.text(strg, xpos, ypos, bit_value)
74  
75      def clear_all(self):
76          """
77          Clears all matrix leds.
78          """
79          self.fill(0)