Add jpeg example for ov5640 & kaluga

Author: jepler

OV5640_Breakout/CircuitPython_Kaluga-jpeg/code.py

@@ -0,0 +1,151 @@
+# SPDX-FileCopyrightText: Copyright (c) 2023 Jeff Epler for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+
+"""
+This demo is designed for the Kaluga development kit version 1.3 with the
+ILI9341 display. It requires CircuitPython 8.
+
+This demo needs reserved psram properly configured in settings.toml:
+CIRCUITPY_RESERVED_PSRAM=1048576
+
+This example also requires an SD card breakout wired as follows:
+ * IO18: SD Clock Input
+ * IO17: SD Serial Output (MISO)
+ * IO14: SD Serial Input (MOSI)
+ * IO12: SD Chip Select
+
+Insert a CircuitPython-compatible SD card before powering on the Kaluga.
+Press the "BOOT" button to take a photo in BMP format.
+"""
+
+import os
+import ssl
+import struct
+
+import board
+import busio
+import displayio
+import espcamera
+import espidf
+import keypad
+import sdcardio
+import socketpool
+import storage
+
+print("Initializing display")
+displayio.release_displays()
+spi = busio.SPI(MOSI=board.LCD_MOSI, clock=board.LCD_CLK)
+display_bus = displayio.FourWire(
+    spi,
+    command=board.LCD_D_C,
+    chip_select=board.LCD_CS,
+    reset=board.LCD_RST,
+    baudrate=80_000_000,
+)
+_INIT_SEQUENCE = (
+    b"\x01\x80\x80"  # Software reset then delay 0x80 (128ms)
+    b"\xEF\x03\x03\x80\x02"
+    b"\xCF\x03\x00\xC1\x30"
+    b"\xED\x04\x64\x03\x12\x81"
+    b"\xE8\x03\x85\x00\x78"
+    b"\xCB\x05\x39\x2C\x00\x34\x02"
+    b"\xF7\x01\x20"
+    b"\xEA\x02\x00\x00"
+    b"\xc0\x01\x23"  # Power control VRH[5:0]
+    b"\xc1\x01\x10"  # Power control SAP[2:0];BT[3:0]
+    b"\xc5\x02\x3e\x28"  # VCM control
+    b"\xc7\x01\x86"  # VCM control2
+    b"\x36\x01\x40"  # Memory Access Control
+    b"\x37\x01\x00"  # Vertical scroll zero
+    b"\x3a\x01\x55"  # COLMOD: Pixel Format Set
+    b"\xb1\x02\x00\x18"  # Frame Rate Control (In Normal Mode/Full Colors)
+    b"\xb6\x03\x08\x82\x27"  # Display Function Control
+    b"\xF2\x01\x00"  # 3Gamma Function Disable
+    b"\x26\x01\x01"  # Gamma curve selected
+    b"\xe0\x0f\x0F\x31\x2B\x0C\x0E\x08\x4E\xF1\x37\x07\x10\x03\x0E\x09\x00"  # Set Gamma
+    b"\xe1\x0f\x00\x0E\x14\x03\x11\x07\x31\xC1\x48\x08\x0F\x0C\x31\x36\x0F"  # Set Gamma
+    b"\x11\x80\x78"  # Exit Sleep then delay 0x78 (120ms)
+    b"\x29\x80\x78"  # Display on then delay 0x78 (120ms)
+)
+
+display = displayio.Display(display_bus, _INIT_SEQUENCE, width=320, height=240)
+
+if espidf.get_reserved_psram() < 1047586:
+    print("""Place the following line in CIRCUITPY/settings.toml, then hard-reset the board:
+```
+CIRCUITPY_RESERVED_PSRAM=1048576
+```
+""")
+    raise SystemExit
+
+print("Initializing SD card")
+sd_spi = busio.SPI(clock=board.IO18, MOSI=board.IO14, MISO=board.IO17)
+sd_cs = board.IO12
+sdcard = sdcardio.SDCard(sd_spi, sd_cs)
+vfs = storage.VfsFat(sdcard)
+storage.mount(vfs, "/sd")
+
+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.RGB565,
+    frame_size=espcamera.FrameSize.QVGA,
+    i2c=board.I2C(),
+    external_clock_frequency=20_000_000,
+    framebuffer_count=1)
+print("initialized")
+display.auto_refresh = False
+
+def exists(filename):
+    try:
+        os.stat(filename)
+        return True
+    except OSError:
+        return False
+
+
+_image_counter = 0
+
+
+def open_next_image(extension="jpg"):
+    global _image_counter  # pylint: disable=global-statement
+    while True:
+        filename = f"/sd/img{_image_counter:04d}.{extension}"
+        _image_counter += 1
+        if exists(filename):
+            continue
+        print("#", filename)
+        return open(filename, "wb")  # pylint: disable=consider-using-with
+
+ow = (display.width - cam.width) // 2
+oh = (display.height - cam.height) // 2
+
+k = keypad.Keys([board.IO0], value_when_pressed=False)
+
+while True:
+    frame = cam.take(1)
+    display_bus.send(42, struct.pack(">hh", ow, cam.width + ow - 1))
+    display_bus.send(43, struct.pack(">hh", oh, cam.height + ow - 1))
+    display_bus.send(44, frame)
+    if (e := k.events.get()) is not None and e.pressed:
+        cam.reconfigure(
+            pixel_format=espcamera.PixelFormat.JPEG,
+            frame_size=espcamera.FrameSize.SVGA,
+        )
+        frame = cam.take(1)
+        if isinstance(frame, memoryview):
+            jpeg = frame
+            print(f"Captured {len(jpeg)} bytes of jpeg data")
+
+            with open_next_image() as f:
+                f.write(jpeg)
+        cam.reconfigure(
+            pixel_format=espcamera.PixelFormat.RGB565,
+            frame_size=espcamera.FrameSize.QVGA,
+        )
+