Update camera demos

Author: jepler

OV5640_Breakout/CircuitPython_Kaluga-ascii-mirror/code.py

@@ -0,0 +1,70 @@
+# SPDX-FileCopyrightText: Copyright (c) 2021 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""
+This demo is designed for the Kaluga development kit version 1.3.
+
+To fix the MemoryError when creating a Camera object, Place the line
+```toml
+CIRCUITPY_RESERVED_PSRAM=1048576
+```
+in the file **CIRCUITPY/settings.toml** and restart.
+"""
+
+import sys
+
+import board
+import keypad
+import displayio
+import espcamera
+import espidf
+
+# The demo runs very slowly if the LCD display is enabled!
+# It's intended to be viewed on the REPL on a host computer
+displayio.release_displays()
+
+if espidf.get_reserved_psram() < 1047586:
+    print("""Place the following line in CIRCUITPY/settings.toml, then hard-reset the board:
+```
+CIRCUITPY_RESERVED_PSRAM
+```
+""")
+    raise SystemExit
+
+print("Initializing camera")
+cam = espcamera.Camera(
+    data_pins=board.CAMERA_DATA,
+    external_clock_pin=board.CAMERA_XCLK,
+    pixel_clock_pin=board.CAMERA_PCLK,
+    vsync_pin=board.CAMERA_VSYNC,
+    href_pin=board.CAMERA_HREF,
+    pixel_format=espcamera.PixelFormat.GRAYSCALE,
+    frame_size=espcamera.FrameSize.QQVGA,
+    i2c=board.I2C(),
+    external_clock_frequency=20_000_000,
+    framebuffer_count=2)
+print("initialized")
+
+k = keypad.Keys([board.IO0], value_when_pressed=False)
+
+chars = b" .:-=+*#%@"
+remap = [chars[i * (len(chars) - 1) // 255] for i in range(256)]
+width = cam.width
+row = bytearray(width//2)
+
+sys.stdout.write("\033[2J")
+
+while True:
+    if (e := k.events.get()) is not None and e.pressed:
+        cam.colorbar = not cam.colorbar
+
+    frame = cam.take(1)
+
+    for j in range(0, cam.height, 5):
+        sys.stdout.write(f"\033[{j//5}H")
+        for i in range(cam.width // 2):
+            row[i] =  remap[frame[width * j + 2 * i]]
+        sys.stdout.write(row)
+        sys.stdout.write("\033[K")
+    sys.stdout.write("\033[J")

OV5640_Breakout/CircuitPython_Kaluga/code.py renamed to OV5640_Breakout/CircuitPython_Kaluga-lcd-mirror/code.py

@@ -0,0 +1,72 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+"""
+This demo is designed for the Raspberry Pi Pico.
+
+It shows the camera image as ASCII art on the USB REPL.
+"""
+
+
+import sys
+import time
+import busio
+import board
+import digitalio
+import adafruit_ov5640
+
+print("construct bus")
+bus = busio.I2C(board.GP9, board.GP8)
+print("construct camera")
+reset = digitalio.DigitalInOut(board.GP10)
+cam = adafruit_ov5640.OV5640(
+    bus,
+    data_pins=(
+        board.GP12,
+        board.GP13,
+        board.GP14,
+        board.GP15,
+        board.GP16,
+        board.GP17,
+        board.GP18,
+        board.GP19,
+    ),
+    clock=board.GP11,
+    vsync=board.GP7,
+    href=board.GP21,
+    mclk=board.GP20,
+    shutdown=None,
+    reset=reset,
+    size=adafruit_ov5640.OV5640_SIZE_QQVGA,
+)
+print("print chip id")
+print(cam.chip_id)
+
+
+cam.colorspace = adafruit_ov5640.OV5640_COLOR_YUV
+cam.flip_y = True
+cam.flip_x = True
+cam.test_pattern = False
+
+buf = bytearray(cam.capture_buffer_size)
+chars = b" .':-+=*%$#"
+remap = [chars[i * (len(chars) - 1) // 255] for i in range(256)]
+
+width = cam.width
+row = bytearray(width)
+
+print("capturing")
+cam.capture(buf)
+print("capture complete")
+
+sys.stdout.write("\033[2J")
+while True:
+    cam.capture(buf)
+    for j in range(0, cam.height, 2):
+        sys.stdout.write(f"\033[{j//2}H")
+        for i in range(cam.width):
+            row[i] = remap[buf[2 * (width * j + i)]]
+        sys.stdout.write(row)
+        sys.stdout.write("\033[K")
+    sys.stdout.write("\033[J")
+    time.sleep(0.1)

OV5640_Breakout/CircuitPython_Pico-ascii-mirror/code.py

@@ -0,0 +1,79 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 Limor Fried for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+"""
+This demo is designed for the Raspberry Pi Pico. with 240x240 SPI TFT display
+
+It shows the camera image on the LCD
+"""
+import time
+import busio
+import board
+import digitalio
+import adafruit_ov5640
+import adafruit_st7789
+import displayio
+
+# Set up the display (You must customize this block for your display!)
+displayio.release_displays()
+spi = busio.SPI(clock=board.GP2, MOSI=board.GP3)
+display_bus = displayio.FourWire(spi, command=board.GP0, chip_select=board.GP1, reset=None)
+display = adafruit_st7789.ST7789(display_bus, width=240, height=240, rowstart=80, rotation=0)
+
+print("construct bus")
+bus = busio.I2C(board.GP9, board.GP8)
+print("construct camera")
+reset = digitalio.DigitalInOut(board.GP10)
+cam = adafruit_ov5640.OV5640(
+    bus,
+    data_pins=(
+        board.GP12,
+        board.GP13,
+        board.GP14,
+        board.GP15,
+        board.GP16,
+        board.GP17,
+        board.GP18,
+        board.GP19,
+    ),
+    clock=board.GP11,
+    vsync=board.GP7,
+    href=board.GP21,
+    mclk=board.GP20,
+    shutdown=None,
+    reset=reset,
+    size=adafruit_ov5640.OV5640_SIZE_240X240,
+)
+print("print chip id")
+print(cam.chip_id)
+
+cam.colorspace = adafruit_ov5640.OV5640_COLOR_RGB
+cam.flip_y = False
+cam.flip_x = False
+cam.test_pattern = False
+
+width = display.width
+height = display.height
+
+#cam.test_pattern = OV7670_TEST_PATTERN_COLOR_BAR_FADE
+bitmap = displayio.Bitmap(cam.width, cam.height, 65535)
+print(width, height, cam.width, cam.height)
+if bitmap is None:
+    raise SystemExit("Could not allocate a bitmap")
+
+g = displayio.Group(scale=1, x=(width-cam.width)//2, y=(height-cam.height)//2)
+tg = displayio.TileGrid(bitmap,
+    pixel_shader=displayio.ColorConverter(input_colorspace=displayio.Colorspace.RGB565_SWAPPED)
+)
+g.append(tg)
+display.show(g)
+
+t0 = time.monotonic_ns()
+display.auto_refresh = False
+while True:
+    cam.capture(bitmap)
+    bitmap.dirty()
+    display.refresh(minimum_frames_per_second=0)
+    t1 = time.monotonic_ns()
+    print("fps", 1e9 / (t1 - t0))
+    t0 = t1