Capture image with Arducam OV5642 + Rpi Pico + SD Card Module + Trigger using CircuitPython

arducam_capture_pico_sdcard_with_trigger.py

import time as utime
import busio
import board
import usb_cdc
from Arducam import *
from board import *
import os

import sdcardio
import storage

from digitalio import DigitalInOut, Direction, Pull

trigger = DigitalInOut(GP14)
trigger.direction = Direction.INPUT
trigger.pull = Pull.UP

path = '/sd/'
filename = 'test'
extension = '.jpg'

def get_filename():
    return path + filename + str(imageCounter) + extension

imageCounter = 0
mode = 0
start_capture = 0
stop_flag=0
once_number=128
value_command=0
flag_command=0
buffer=bytearray(once_number)
isCapturing = False

spi = busio.SPI(GP10, MOSI=GP11, MISO=GP12)
cs = GP13
sd = sdcardio.SDCard(spi, cs)

vfs = storage.VfsFat(sd)
storage.mount(vfs, '/sd')
with open(get_filename(), 'wb'):
    pass

mycam = ArducamClass(OV5642)
mycam.Camera_Detection()
mycam.Spi_Test()
mycam.Camera_Init()
utime.sleep(1)
mycam.set_format(JPEG)
mycam.OV5642_set_JPEG_size(OV5642_1280x960)
        
def get_still(mycam):
    once_number = 128
    buffer=bytearray(once_number)
    count = 0
    finished = 0
    length = mycam.read_fifo_length()
    mycam.SPI_CS_LOW()
    mycam.set_fifo_burst()

    while finished == 0:
        mycam.spi.readinto(buffer, start=0, end=once_number)
        print(str(count) + ' of ' + str(length))
        with open(get_filename(), 'ab') as fj:
            fj.write(buffer)
        count += once_number
        
        if count + once_number > length:
            print(str(count) + ' of ' + str(length))
            count = length - count
            mycam.spi.readinto(buffer, start=0, end=count)
            with open(get_filename(), 'ab') as fj:
                fj.write(buffer)
            mycam.SPI_CS_HIGH()
            mycam.clear_fifo_flag()
            finished = 1
            return finished

def capture_image():
    mycam.flush_fifo()
    mycam.clear_fifo_flag()
    mycam.start_capture()
    finished = 0
    while finished == 0:
        if mycam.get_bit(ARDUCHIP_TRIG,CAP_DONE_MASK)!=0:
            finished = get_still(mycam)
    print('Capture Finished!')
    print(get_filename())

while True:
    if not trigger.value:
        print("Triggered")
        if not isCapturing:
            isCapturing = True
            capture_image();
            imageCounter = imageCounter + 1
    else:
        isCapturing = False
        pass

    utime.sleep(0.1)

Hi Muhammad!

what does this buffer size thing really means?

This was picked from another script I found but did not experiment with it any further because I had so many issues making it work.

have u done any testing regarding the hardware video

No, I was only looking to take pictures. It's possible to record a video but I cannot help you with that.

Unfortunately, Arducam did not put any effort into making the software accessible to all consumers. They only focus on hardware, and that is an error. I'm sorry I can't help you. I hope you have better luck than me with contacting Arducam because they usually don't answer any questions on their GitHub repositories. 😞