CircuitPython and Library Setup
The dreidel code is written in CircuitPython. So, first make sure you have the latest firmware installed, which can be downloaded from the CircuitPython website here:
Then make sure you have the following libraries installed. These should go in your CIRCUITPY/lib folder:
You can download the library bundle from here:
Bitmap Image Files
Next, you'll need these two BMP files, which contain the dreidel background image and symbols. Put these in your root CIRCUITPY folder (same place the .py code will go):
Dreidel Code
And here's the code for the dreidel game. To have this run automatically, save it as code.py in your CIRCUITPY folder.
# SPDX-FileCopyrightText: 2019 Carter Nelson for Adafruit Industries
#
# SPDX-License-Identifier: MIT
import time
import random
import displayio
import adafruit_imageload
from adafruit_circuitplayground.bluefruit import cpb
from adafruit_gizmo import tft_gizmo
SHAKE_THRESHOLD = 20
#pylint: disable=bad-continuation
# define melody to play while spinning (freq, duration)
melody = (
# oh drei del drei del
(330, 8), (392, 8), (330, 8), (392, 8), (330, 8),
# drei del I made it
(392, 8), (330, 16), (330, 8), (392, 8), (392, 8),
# out of clay
(349, 8), (330, 8), (294, 16), (0, 8),
# oh drei del drei del
(294, 8), (349, 8), (294, 8), (349, 8), (294, 8),
# drei del then drei del
(349, 8), (294, 16), (294, 8), (392, 8), (349, 8),
# I shall play
(330, 8), (294, 8), (262, 16),
)
melody_tempo = 0.02
#pylint: enable=bad-continuation
# setup TFT Gizmo and main display group (splash)
display = tft_gizmo.TFT_Gizmo()
splash = displayio.Group()
display.show(splash)
# load dreidel background image
dreidel_bmp, dreidel_pal = adafruit_imageload.load("/dreidel_background.bmp",
bitmap=displayio.Bitmap,
palette=displayio.Palette)
dreidel_tg = displayio.TileGrid(dreidel_bmp, pixel_shader=dreidel_pal)
splash.append(dreidel_tg)
# load dreidel symbols (sprite sheet)
symbols_bmp, symbols_pal = adafruit_imageload.load("/dreidel_sheet.bmp",
bitmap=displayio.Bitmap,
palette=displayio.Palette)
for index, color in enumerate(symbols_pal):
if color == 0xFFFF01:
symbols_pal.make_transparent(index)
symbols_tg = displayio.TileGrid(symbols_bmp, pixel_shader=symbols_pal,
width = 1,
height = 1,
tile_width = 60,
tile_height = 60)
symbols_group = displayio.Group(scale=2, x=60, y=70)
symbols_group.append(symbols_tg)
splash.append(symbols_group)
# dreidel time!
tile = 0
while True:
# wait for shake
while not cpb.shake(shake_threshold=SHAKE_THRESHOLD):
pass
# play melody while "spinning" the symbols
for note, duration in melody:
symbols_tg[0] = tile % 4
tile += 1
cpb.play_tone(note, duration * melody_tempo)
# land on a random symbol
symbols_tg[0] = random.randint(0, 3)
# prevent immediate re-shake
time.sleep(2)
