105 lines
2.6 KiB
Python
105 lines
2.6 KiB
Python
# SPDX-FileCopyrightText: Copyright (c) 2023 Limor Fried for Adafruit Industries
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#
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# SPDX-License-Identifier: Unlicense
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"""
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This demo is designed for the Raspberry Pi Pico and Camera PiCowbell
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When the shutter is pressed the camera is autofocussed before capturing
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an image andsaving it to the microSD card.
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"""
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import os
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import time
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import busio
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import board
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import digitalio
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import keypad
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import sdcardio
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import storage
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import adafruit_ov5640
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print("Initializing SD card")
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sd_spi = busio.SPI(clock=board.GP18, MOSI=board.GP19, MISO=board.GP16)
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sd_cs = board.GP17
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sdcard = sdcardio.SDCard(sd_spi, sd_cs)
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vfs = storage.VfsFat(sdcard)
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storage.mount(vfs, "/sd")
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print("construct bus")
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i2c = busio.I2C(board.GP5, board.GP4)
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print("construct camera")
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reset = digitalio.DigitalInOut(board.GP14)
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cam = adafruit_ov5640.OV5640(
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i2c,
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data_pins=(
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board.GP6,
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board.GP7,
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board.GP8,
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board.GP9,
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board.GP10,
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board.GP11,
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board.GP12,
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board.GP13,
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),
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clock=board.GP3,
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vsync=board.GP0,
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href=board.GP2,
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mclk=None,
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shutdown=None,
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reset=reset,
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size=adafruit_ov5640.OV5640_SIZE_VGA,
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)
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print("print chip id")
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print(cam.chip_id)
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keys = keypad.Keys((board.GP22,), value_when_pressed=False, pull=True)
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def exists(filename):
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try:
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os.stat(filename)
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return True
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except OSError as _:
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return False
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_image_counter = 0
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def open_next_image():
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global _image_counter # pylint: disable=global-statement
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while True:
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filename = f"/sd/img{_image_counter:04d}.jpg"
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_image_counter += 1
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if exists(filename):
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continue
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print("# writing to", filename)
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return open(filename, "wb")
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cam.colorspace = adafruit_ov5640.OV5640_COLOR_JPEG
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cam.quality = 3
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b = bytearray(cam.capture_buffer_size)
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cam.autofocus()
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print("AF Status: ", cam.autofocus_status, cam.autofocus_vcm_step)
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jpeg = cam.capture(b)
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while True:
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shutter = keys.events.get()
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# event will be None if nothing has happened.
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if shutter:
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if shutter.pressed:
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cam.autofocus()
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print("AF Status: ", cam.autofocus_status, cam.autofocus_vcm_step)
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time.sleep(0.01)
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jpeg = cam.capture(b)
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print(f"Captured {len(jpeg)} bytes of jpeg data")
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print(f" (had allocated {cam.capture_buffer_size} bytes")
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print(f"Resolution {cam.width}x{cam.height}")
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try:
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with open_next_image() as f:
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f.write(jpeg)
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print("# Wrote image")
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except OSError as e:
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print(e)
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