1  # SPDX-FileCopyrightText: 2017 Scott Shawcroft, written for Adafruit Industries
 2  # SPDX-FileCopyrightText: Copyright (c) 2021 Jeff Epler for Adafruit Industries
 3  #
 4  # SPDX-License-Identifier: Unlicense
 5  
 6  """
 7  The Kaluga development kit comes in two versions (v1.2 and v1.3); this demo is
 8  tested on v1.3.
 9  
10  The v1.3 development kit's LCD can have one of two chips, the ili9341 or
11  st7789.  This demo is for the ili9341.  There is no marking to distinguish the
12  two chips.  If the visible portion of the display's flexible cable has a bunch
13  of straight lines, it may be an ili9341.  If it has a bunch of wiggly traces,
14  it may be an st7789.  If in doubt, try both demos.
15  
16  The audio board must be mounted between the Kaluga and the LCD, it provides the
17  I2C pull-ups(!)
18  """
19  
20  import board
21  import busio
22  import displayio
23  from adafruit_st7789 import ST7789
24  import adafruit_ov2640
25  
26  # Pylint is unable to see that the "size" property of OV2640_GrandCentral exists
27  # pylint: disable=attribute-defined-outside-init
28  
29  # Release any resources currently in use for the displays
30  displayio.release_displays()
31  
32  spi = busio.SPI(MOSI=board.LCD_MOSI, clock=board.LCD_CLK)
33  display_bus = displayio.FourWire(
34      spi, command=board.LCD_D_C, chip_select=board.LCD_CS, reset=board.LCD_RST
35  )
36  display = ST7789(
37      display_bus, width=320, height=240, rotation=90, reverse_bytes_in_word=True
38  )
39  
40  bus = busio.I2C(scl=board.CAMERA_SIOC, sda=board.CAMERA_SIOD)
41  cam = adafruit_ov2640.OV2640(
42      bus,
43      data_pins=board.CAMERA_DATA,
44      clock=board.CAMERA_PCLK,
45      vsync=board.CAMERA_VSYNC,
46      href=board.CAMERA_HREF,
47      mclk=board.CAMERA_XCLK,
48      mclk_frequency=20_000_000,
49      size=adafruit_ov2640.OV2640_SIZE_QVGA,
50  )
51  
52  # cam.flip_x = False
53  # cam.flip_y = True
54  pid = cam.product_id
55  ver = cam.product_version
56  print(f"Detected pid={pid:x} ver={ver:x}")
57  # cam.test_pattern = True
58  
59  g = displayio.Group(scale=1)
60  bitmap = displayio.Bitmap(320, 240, 65536)
61  tg = displayio.TileGrid(
62      bitmap,
63      pixel_shader=displayio.ColorConverter(
64          input_colorspace=displayio.Colorspace.BGR565_SWAPPED
65      ),
66  )
67  g.append(tg)
68  display.root_group = g
69  
70  display.auto_refresh = False
71  while True:
72      cam.capture(bitmap)
73      bitmap.dirty()
74      display.refresh(minimum_frames_per_second=0)
75      print(".")
76  
77  cam.deinit()