Raspberry pi pico

.gitignore

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+*.jpg
+.venv
+.idea

common/common_constants.py

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+from micropython import const
+
+OV2640_JPEG_INIT = (
+    (0xff, 0x00),
+    (0x2c, 0xff),
+    (0x2e, 0xdf),
+    (0xff, 0x01),
+    (0x3c, 0x32),
+    (0x11, 0x04),
+    (0x09, 0x02),
+    (0x04, 0x28),
+    (0x13, 0xe5),
+    (0x14, 0x48),
+    (0x2c, 0x0c),
+    (0x33, 0x78),
+    (0x3a, 0x33),
+    (0x3b, 0xfB),
+    (0x3e, 0x00),
+    (0x43, 0x11),
+    (0x16, 0x10),
+    (0x39, 0x92),
+    (0x35, 0xda),
+    (0x22, 0x1a),
+    (0x37, 0xc3),
+    (0x23, 0x00),
+    (0x34, 0xc0),
+    (0x36, 0x1a),
+    (0x06, 0x88),
+    (0x07, 0xc0),
+    (0x0d, 0x87),
+    (0x0e, 0x41),
+    (0x4c, 0x00),
+    (0x48, 0x00),
+    (0x5B, 0x00),
+    (0x42, 0x03),
+    (0x4a, 0x81),
+    (0x21, 0x99),
+    (0x24, 0x40),
+    (0x25, 0x38),
+    (0x26, 0x82),
+    (0x5c, 0x00),
+    (0x63, 0x00),
+    (0x61, 0x70),
+    (0x62, 0x80),
+    (0x7c, 0x05),
+    (0x20, 0x80),
+    (0x28, 0x30),
+    (0x6c, 0x00),
+    (0x6d, 0x80),
+    (0x6e, 0x00),
+    (0x70, 0x02),
+    (0x71, 0x94),
+    (0x73, 0xc1),
+    (0x12, 0x40),
+    (0x17, 0x11),
+    (0x18, 0x43),
+    (0x19, 0x00),
+    (0x1a, 0x4b),
+    (0x32, 0x09),
+    (0x37, 0xc0),
+    (0x4f, 0x60),
+    (0x50, 0xa8),
+    (0x6d, 0x00),
+    (0x3d, 0x38),
+    (0x46, 0x3f),
+    (0x4f, 0x60),
+    (0x0c, 0x3c),
+    (0xff, 0x00),
+    (0xe5, 0x7f),
+    (0xf9, 0xc0),
+    (0x41, 0x24),
+    (0xe0, 0x14),
+    (0x76, 0xff),
+    (0x33, 0xa0),
+    (0x42, 0x20),
+    (0x43, 0x18),
+    (0x4c, 0x00),
+    (0x87, 0xd5),
+    (0x88, 0x3f),
+    (0xd7, 0x03),
+    (0xd9, 0x10),
+    (0xd3, 0x82),
+    (0xc8, 0x08),
+    (0xc9, 0x80),
+    (0x7c, 0x00),
+    (0x7d, 0x00),
+    (0x7c, 0x03),
+    (0x7d, 0x48),
+    (0x7d, 0x48),
+    (0x7c, 0x08),
+    (0x7d, 0x20),
+    (0x7d, 0x10),
+    (0x7d, 0x0e),
+    (0x90, 0x00),
+    (0x91, 0x0e),
+    (0x91, 0x1a),
+    (0x91, 0x31),
+    (0x91, 0x5a),
+    (0x91, 0x69),
+    (0x91, 0x75),
+    (0x91, 0x7e),
+    (0x91, 0x88),
+    (0x91, 0x8f),
+    (0x91, 0x96),
+    (0x91, 0xa3),
+    (0x91, 0xaf),
+    (0x91, 0xc4),
+    (0x91, 0xd7),
+    (0x91, 0xe8),
+    (0x91, 0x20),
+    (0x92, 0x00),
+    (0x93, 0x06),
+    (0x93, 0xe3),
+    (0x93, 0x05),
+    (0x93, 0x05),
+    (0x93, 0x00),
+    (0x93, 0x04),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x93, 0x00),
+    (0x96, 0x00),
+    (0x97, 0x08),
+    (0x97, 0x19),
+    (0x97, 0x02),
+    (0x97, 0x0c),
+    (0x97, 0x24),
+    (0x97, 0x30),
+    (0x97, 0x28),
+    (0x97, 0x26),
+    (0x97, 0x02),
+    (0x97, 0x98),
+    (0x97, 0x80),
+    (0x97, 0x00),
+    (0x97, 0x00),
+    (0xc3, 0xed),
+    (0xa4, 0x00),
+    (0xa8, 0x00),
+    (0xc5, 0x11),
+    (0xc6, 0x51),
+    (0xbf, 0x80),
+    (0xc7, 0x10),
+    (0xb6, 0x66),
+    (0xb8, 0xA5),
+    (0xb7, 0x64),
+    (0xb9, 0x7C),
+    (0xb3, 0xaf),
+    (0xb4, 0x97),
+    (0xb5, 0xFF),
+    (0xb0, 0xC5),
+    (0xb1, 0x94),
+    (0xb2, 0x0f),
+    (0xc4, 0x5c),
+    (0xc0, 0x64),
+    (0xc1, 0x4B),
+    (0x8c, 0x00),
+    (0x86, 0x3D),
+    (0x50, 0x00),
+    (0x51, 0xC8),
+    (0x52, 0x96),
+    (0x53, 0x00),
+    (0x54, 0x00),
+    (0x55, 0x00),
+    (0x5a, 0xC8),
+    (0x5b, 0x96),
+    (0x5c, 0x00),
+    (0xd3, 0x00),
+    (0xc3, 0xed),
+    (0x7f, 0x00),
+    (0xda, 0x00),
+    (0xe5, 0x1f),
+    (0xe1, 0x67),
+    (0xe0, 0x00),
+    (0xdd, 0x7f),
+    (0x05, 0x00),
+    (0x12, 0x40),
+    (0xd3, 0x04),
+    (0xc0, 0x16),
+    (0xC1, 0x12),
+    (0x8c, 0x00),
+    (0x86, 0x3d),
+    (0x50, 0x00),
+    (0x51, 0x2C),
+    (0x52, 0x24),
+    (0x53, 0x00),
+    (0x54, 0x00),
+    (0x55, 0x00),
+    (0x5A, 0x2c),
+    (0x5b, 0x24),
+    (0x5c, 0x00),
+    (0xff, 0xff),
+)
+
+OV2640_YUV422 = (
+    (0xFF, 0x00),
+    (0x05, 0x00),
+    (0xDA, 0x10),
+    (0xD7, 0x03),
+    (0xDF, 0x00),
+    (0x33, 0x80),
+    (0x3C, 0x40),
+    (0xe1, 0x77),
+    (0x00, 0x00),
+    (0xff, 0xff),
+)
+
+OV2640_JPEG = (
+    (0xe0, 0x14),
+    (0xe1, 0x77),
+    (0xe5, 0x1f),
+    (0xd7, 0x03),
+    (0xda, 0x10),
+    (0xe0, 0x00),
+    (0xFF, 0x01),
+    (0x04, 0x08),
+    (0xff, 0xff),
+)
+
+SENSORADDR = const(0x30)

rpi_pico/contextlib.py

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+"""Utilities for with-statement contexts.  See PEP 343.
+Original source code: https://hg.python.org/cpython/file/3.4/Lib/contextlib.py
+Not implemented:
+ - redirect_stdout;
+ - ExitStack.
+ - closing
+ - supress
+"""
+
+class ContextDecorator(object):
+    "A base class or mixin that enables context managers to work as decorators."
+
+    def _recreate_cm(self):
+        """Return a recreated instance of self.
+        Allows an otherwise one-shot context manager like
+        _GeneratorContextManager to support use as
+        a decorator via implicit recreation.
+        This is a private interface just for _GeneratorContextManager.
+        See issue #11647 for details.
+        """
+        return self
+
+    def __call__(self, func):
+        def inner(*args, **kwds):
+            with self._recreate_cm():
+                return func(*args, **kwds)
+        return inner
+
+
+class _GeneratorContextManager(ContextDecorator):
+    """Helper for @contextmanager decorator."""
+
+    def __init__(self, func, *args, **kwds):
+        self.gen = func(*args, **kwds)
+        self.func, self.args, self.kwds = func, args, kwds
+
+    def _recreate_cm(self):
+        # _GCM instances are one-shot context managers, so the
+        # CM must be recreated each time a decorated function is
+        # called
+        return self.__class__(self.func, *self.args, **self.kwds)
+
+    def __enter__(self):
+        try:
+            return next(self.gen)
+        except StopIteration:
+            raise RuntimeError("generator didn't yield") from None
+
+    def __exit__(self, type, value, traceback):
+        if type is None:
+            try:
+                next(self.gen)
+            except StopIteration:
+                return
+            else:
+                raise RuntimeError("generator didn't stop")
+        else:
+            if value is None:
+                # Need to force instantiation so we can reliably
+                # tell if we get the same exception back
+                value = type()
+            try:
+                self.gen.throw(type, value, traceback)
+                raise RuntimeError("generator didn't stop after throw()")
+            except StopIteration as exc:
+                # Suppress the exception *unless* it's the same exception that
+                # was passed to throw().  This prevents a StopIteration
+                # raised inside the "with" statement from being suppressed
+                return exc is not value
+
+
+def contextmanager(func):
+    """@contextmanager decorator.
+    Typical usage:
+        @contextmanager
+        def some_generator(<arguments>):
+            <setup>
+            try:
+                yield <value>
+            finally:
+                <cleanup>
+    This makes this:
+        with some_generator(<arguments>) as <variable>:
+            <body>
+    equivalent to this:
+        <setup>
+        try:
+            <variable> = <value>
+            <body>
+        finally:
+            <cleanup>
+    """
+    def helper(*args, **kwds):
+        return _GeneratorContextManager(func, *args, **kwds)
+    return helper

rpi_pico/demo.py

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+import ov2640
+import gc
+import time
+import sys
+
+FILE_NAME = 'image2.jpg'
+
+def main():
+    print("initializing camera")
+    cam = ov2640.ov2640(resolution=ov2640.OV2640_320x240_JPEG)
+    # cam = ov2640.ov2640(resolution=ov2640.OV2640_1024x768_JPEG)
+    print(gc.mem_free())
+
+    image_length = cam.capture_to_file(FILE_NAME, True)
+    print("captured image is %d bytes" % image_length)
+    print("image is saved to %s" % FILE_NAME)
+
+if __name__ == '__main__':
+    main()