1  # SPDX-FileCopyrightText: Copyright (c) 2023 Lady Ada for Adafruit Industries
 2  #
 3  # SPDX-License-Identifier: Unlicense
 4  
 5  """Capture an image from the camera and display it as ASCII art.
 6  
 7  This demo is designed to run on the Raspberry Pi Pico, but you can adapt it
 8  to other boards by changing the constructors for `bus` and `cam`
 9  appropriately.
10  
11  The camera is placed in YUV mode, so the top 8 bits of each color
12  value can be treated as "greyscale".
13  
14  It's important that you use a terminal program that can interpret
15  "ANSI" escape sequences.  The demo uses them to "paint" each frame
16  on top of the previous one, rather than scrolling.
17  
18  Remember to take the lens cap off!
19  """
20  import sys
21  import time
22  import busio
23  import board
24  import digitalio
25  import adafruit_ov5640
26  
27  print("construct bus")
28  bus = busio.I2C(board.GP9, board.GP8)
29  print("construct camera")
30  reset = digitalio.DigitalInOut(board.GP10)
31  cam = adafruit_ov5640.OV5640(
32      bus,
33      data_pins=(
34          board.GP12,
35          board.GP13,
36          board.GP14,
37          board.GP15,
38          board.GP16,
39          board.GP17,
40          board.GP18,
41          board.GP19,
42      ),  # [16]     [org]
43      clock=board.GP11,  # [15]     [blk]
44      vsync=board.GP7,  # [10]     [brn]
45      href=board.GP21,  # [27/o14] [red]
46      mclk=board.GP20,  # [16/o15]
47      shutdown=None,
48      reset=reset,
49      size=adafruit_ov5640.OV5640_SIZE_QQVGA,
50  )
51  print("print chip id")
52  print(cam.chip_id)
53  
54  
55  cam.colorspace = adafruit_ov5640.OV5640_COLOR_YUV
56  cam.flip_y = True
57  cam.flip_x = True
58  cam.test_pattern = False
59  
60  buf = bytearray(cam.capture_buffer_size)
61  chars = b" .':-+=*%$#"
62  remap = [chars[i * (len(chars) - 1) // 255] for i in range(256)]
63  
64  width = cam.width
65  row = bytearray(width)
66  
67  print("capturing")
68  cam.capture(buf)
69  print("capture complete")
70  
71  sys.stdout.write("\033[2J")
72  while True:
73      cam.capture(buf)
74      for j in range(0, cam.height, 2):
75          sys.stdout.write(f"\033[{j//2}H")
76          for i in range(cam.width):
77              row[i] = remap[buf[2 * (width * j + i)]]
78          sys.stdout.write(row)
79          sys.stdout.write("\033[K")
80      sys.stdout.write("\033[J")
81      time.sleep(0.1)