Once you've finished setting up your MEMENTO with CircuitPython, you can access the code and necessary libraries by downloading the Project Bundle.
To do this, click on the Download Project Bundle button in the window below. It will download to your computer as a zipped folder.
# SPDX-FileCopyrightText: 2023 Jeff Epler for Adafruit Industries
#
# SPDX-License-Identifier: Unlicense
import time
import board
import bitmaptools
import displayio
import gifio
import ulab.numpy as np
from adafruit_debouncer import Button
import adafruit_pycamera
from digitalio import DigitalInOut, Direction, Pull
pycam = adafruit_pycamera.PyCamera()
# pycam.live_preview_mode()
settings = (None, "resolution", "effect", "mode", "led_level", "led_color")
curr_setting = 0
pin = DigitalInOut(board.A0)
pin.direction = Direction.INPUT
pin.pull = Pull.UP
ext_button = Button(pin, long_duration_ms=1000)
print("Starting!")
# pycam.tone(200, 0.1)
last_frame = displayio.Bitmap(pycam.camera.width, pycam.camera.height, 65535)
onionskin = displayio.Bitmap(pycam.camera.width, pycam.camera.height, 65535)
while True:
if pycam.mode_text == "STOP" and pycam.stop_motion_frame != 0:
# alpha blend
new_frame = pycam.continuous_capture()
bitmaptools.alphablend(
onionskin, last_frame, new_frame, displayio.Colorspace.RGB565_SWAPPED
)
pycam.blit(onionskin)
elif pycam.mode_text == "GBOY":
bitmaptools.dither(
last_frame, pycam.continuous_capture(), displayio.Colorspace.RGB565_SWAPPED
)
pycam.blit(last_frame)
else:
pycam.blit(pycam.continuous_capture())
# print("\t\t", capture_time, blit_time)
pycam.keys_debounce()
ext_button.update()
# test shutter button
if pycam.shutter.long_press or ext_button.long_press:
print("FOCUS")
print(pycam.autofocus_status)
pycam.autofocus()
print(pycam.autofocus_status)
if pycam.shutter.short_count or ext_button.short_count:
print("Shutter released")
if pycam.mode_text == "STOP":
pycam.capture_into_bitmap(last_frame)
pycam.stop_motion_frame += 1
try:
pycam.display_message("Snap!", color=0x0000FF)
pycam.capture_jpeg()
except TypeError as e:
pycam.display_message("Failed", color=0xFF0000)
time.sleep(0.5)
except RuntimeError as e:
pycam.display_message("Error\nNo SD Card", color=0xFF0000)
time.sleep(0.5)
pycam.live_preview_mode()
if pycam.mode_text == "GBOY":
try:
f = pycam.open_next_image("gif")
except RuntimeError as e:
pycam.display_message("Error\nNo SD Card", color=0xFF0000)
time.sleep(0.5)
continue
with gifio.GifWriter(
f,
pycam.camera.width,
pycam.camera.height,
displayio.Colorspace.RGB565_SWAPPED,
dither=True,
) as g:
g.add_frame(last_frame, 1)
if pycam.mode_text == "GIF":
try:
f = pycam.open_next_image("gif")
except RuntimeError as e:
pycam.display_message("Error\nNo SD Card", color=0xFF0000)
time.sleep(0.5)
continue
i = 0
ft = []
pycam._mode_label.text = "RECORDING" # pylint: disable=protected-access
pycam.display.refresh()
with gifio.GifWriter(
f,
pycam.camera.width,
pycam.camera.height,
displayio.Colorspace.RGB565_SWAPPED,
dither=True,
) as g:
t00 = t0 = time.monotonic()
while (i < 15) or not pycam.shutter_button.value:
i += 1
_gifframe = pycam.continuous_capture()
g.add_frame(_gifframe, 0.12)
pycam.blit(_gifframe)
t1 = time.monotonic()
ft.append(1 / (t1 - t0))
print(end=".")
t0 = t1
pycam._mode_label.text = "GIF" # pylint: disable=protected-access
print(f"\nfinal size {f.tell()} for {i} frames")
print(f"average framerate {i/(t1-t00)}fps")
print(f"best {max(ft)} worst {min(ft)} std. deviation {np.std(ft)}")
f.close()
pycam.display.refresh()
if pycam.mode_text == "JPEG":
pycam.tone(200, 0.1)
try:
pycam.display_message("Snap!", color=0x0000FF)
pycam.capture_jpeg()
pycam.live_preview_mode()
except TypeError as e:
pycam.display_message("Failed", color=0xFF0000)
time.sleep(0.5)
pycam.live_preview_mode()
except RuntimeError as e:
pycam.display_message("Error\nNo SD Card", color=0xFF0000)
time.sleep(0.5)
if pycam.card_detect.fell:
print("SD card removed")
pycam.unmount_sd_card()
pycam.display.refresh()
if pycam.card_detect.rose:
print("SD card inserted")
pycam.display_message("Mounting\nSD Card", color=0xFFFFFF)
for _ in range(3):
try:
print("Mounting card")
pycam.mount_sd_card()
print("Success!")
break
except OSError as e:
print("Retrying!", e)
time.sleep(0.5)
else:
pycam.display_message("SD Card\nFailed!", color=0xFF0000)
time.sleep(0.5)
pycam.display.refresh()
if pycam.up.fell:
print("UP")
key = settings[curr_setting]
if key:
setattr(pycam, key, getattr(pycam, key) + 1)
if pycam.down.fell:
print("DN")
key = settings[curr_setting]
if key:
setattr(pycam, key, getattr(pycam, key) - 1)
if pycam.left.fell:
print("LF")
curr_setting = (curr_setting + 1) % len(settings)
print(settings[curr_setting])
# new_res = min(len(pycam.resolutions)-1, pycam.get_resolution()+1)
# pycam.set_resolution(pycam.resolutions[new_res])
pycam.select_setting(settings[curr_setting])
if pycam.right.fell:
print("RT")
curr_setting = (curr_setting - 1 + len(settings)) % len(settings)
print(settings[curr_setting])
pycam.select_setting(settings[curr_setting])
# new_res = max(1, pycam.get_resolution()-1)
# pycam.set_resolution(pycam.resolutions[new_res])
if pycam.select.fell:
print("SEL")
if pycam.ok.fell:
print("OK")
Upload the Code and Libraries to the MEMENTO
After downloading the Project Bundle, plug your MEMENTO into the computer's USB port with a known good USB data+power cable. You should see a new flash drive appear in the computer's File Explorer or Finder (depending on your operating system) called CIRCUITPY. Unzip the folder and copy the following items to the MEMENTO's CIRCUITPY drive.
- lib folder
- code.py
Your MEMENTO CIRCUITPY drive should look like this after copying the lib folder and the code.py file.
How the CircuitPython Code Works
The code consists of the Fancy Camera example from the PyCamera library written by Jeff Epler with some minor modifications to add in the external shutter button. The A0 pin is instantiated as an input and passed as a Button object with a long_press interval of one second.
pin = DigitalInOut(board.A0) pin.direction = Direction.INPUT pin.pull = Pull.UP ext_button = Button(pin, long_duration_ms=1000)
In the loop, the ext_button is checked for either a long or short press alongside the shutter button on the MEMENTO. A short press takes a photo and a long press focuses.
pycam.keys_debounce()
ext_button.update()
# test shutter button
if pycam.shutter.long_press or ext_button.long_press:
print("FOCUS")
print(pycam.autofocus_status)
pycam.autofocus()
print(pycam.autofocus_status)
if pycam.shutter.short_count or ext_button.short_count:
Otherwise, the code is identical to the Fancy Camera example, leaving all of the excellent functionality in place.
Page last edited January 20, 2025
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