adafruit-circuitpython-ov5640

Introduction

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CircuitPython driver for OV5640 Camera

Installing to a Connected CircuitPython Device with Circup

Make sure that you have circup installed in your Python environment. Install it with the following command if necessary:

.. code-block:: shell

pip3 install circup

With circup installed and your CircuitPython device connected use the following command to install:

.. code-block:: shell

circup install adafruit_ov5640

Or the following command to update an existing version:

.. code-block:: shell

circup update

Usage Example

.. code-block: python

"""Capture an image from the camera and display it as ASCII art.

This demo is designed to run on the Kaluga, but you can adapt it
to other boards by changing the constructors for `bus` and `cam`
appropriately.

The camera is placed in YUV mode, so the top 8 bits of each color
value can be treated as "greyscale".

It's important that you use a terminal program that can interpret
"ANSI" escape sequences.  The demo uses them to "paint" each frame
on top of the prevous one, rather than scrolling.

Remember to take the lens cap off, or un-comment the line setting
the test pattern!
"""

import sys
import time

import busio
import board

import adafruit_ov5640

print("construct bus")
bus = busio.I2C(scl=board.CAMERA_SIOC, sda=board.CAMERA_SIOD)
print("construct camera")
cam = adafruit_ov5640.OV5640(
    bus,
    data_pins=board.CAMERA_DATA,
    clock=board.CAMERA_PCLK,
    vsync=board.CAMERA_VSYNC,
    href=board.CAMERA_HREF,
    mclk=board.CAMERA_XCLK,
    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(0.05)

Documentation

API documentation for this library can be found on Read the Docs <https://docs.circuitpython.org/projects/ov5640/en/latest/>_.

For information on building library documentation, please check out this guide <https://learn.adafruit.com/creating-and-sharing-a-circuitpython-library/sharing-our-docs-on-readthedocs#sphinx-5-1>_.

Contributing

Contributions are welcome! Please read our Code of Conduct <https://github.com/adafruit/Adafruit_CircuitPython_ov5640/blob/HEAD/CODE_OF_CONDUCT.md>_ before contributing to help this project stay welcoming.