qrio example

Author: jepler

circuitpython-esp32-camera/esp32-s3eye-qrio-repl/code.py

@@ -0,0 +1,57 @@
+# 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 with the
+ILI9341 display.
+"""
+
+import esp32_camera
+from terminalio import FONT
+import board
+import qrio
+import displayio
+import busio
+import struct
+
+print("Initializing camera")
+cam = esp32_camera.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=esp32_camera.PixelFormat.RGB565,
+    frame_size=esp32_camera.FrameSize.R240X240,
+    i2c=board.I2C(),
+    external_clock_frequency=20_000_000,
+    framebuffer_count=2)
+cam.vflip = True
+cam.hmirror = True
+
+board.DISPLAY.auto_refresh = False
+display_bus = board.DISPLAY.bus
+
+print(cam.width, cam.height)
+qrdecoder = qrio.QRDecoder(cam.width, cam.height)
+
+print(qrdecoder.width, qrdecoder.height)
+#raise SystemExit
+
+ow = (board.DISPLAY.width - cam.width) // 2
+oh = (board.DISPLAY.height - cam.height) // 2
+display_bus.send(42, struct.pack(">hh", ow, cam.width + ow - 1))
+display_bus.send(43, struct.pack(">hh", oh, cam.height + ow - 1))
+
+while True:
+    frame = cam.take(1)
+    display_bus.send(44, frame)
+    for row in qrdecoder.decode(memoryview(frame), qrio.PixelPolicy.RGB565_SWAPPED):
+        payload = row.payload
+        try:
+            payload = payload.decode("utf-8")
+        except UnicodeError:
+            payload = str(payload)
+        print(payload)
+    print(end=".")