The code in its entirety is shown below. You should click on Download: Zip in order to get the graphics file SpriteSheet.bmp and sound files (win.wav, lose.wav) used by the game.
Ensure your PyPortal is plugged into your computer via a known good USB cable. The PyPortal should show up as a flash drive called CIRCUITPY.
Open the zip file and copy all the files listed below to CIRCUITPY.
- code.py
- SpriteSheet.bmp
- win.wav
- lose.wav
Note: The boot_out.txt file you may see on the CIRCUITPY drive is generated by CircuitPython and is not part of the needed files for this project.
# SPDX-FileCopyrightText: 2019 Dave Astels for Adafruit Industries
#
# SPDX-License-Identifier: MIT
"""
PyPortal MineSweeper
Adafruit invests time and resources providing this open source code.
Please support Adafruit and open source hardware by purchasing
products from Adafruit!
Written by Dave Astels for Adafruit Industries
Copyright (c) 2019 Adafruit Industries
Licensed under the MIT license.
All text above must be included in any redistribution.
"""
import time
from random import seed, randint
import board
import digitalio
import displayio
import audioio
try:
from audioio import WaveFile
except ImportError:
from audiocore import WaveFile
import adafruit_imageload
import adafruit_touchscreen
seed(int(time.monotonic()))
# Set up audio
speaker_enable = digitalio.DigitalInOut(board.SPEAKER_ENABLE)
speaker_enable.switch_to_output(False)
if hasattr(board, 'AUDIO_OUT'):
audio = audioio.AudioOut(board.AUDIO_OUT)
elif hasattr(board, 'SPEAKER'):
audio = audioio.AudioOut(board.SPEAKER)
else:
raise AttributeError('Board does not have a builtin speaker!')
NUMBER_OF_BOMBS = 15
# Board pieces
OPEN0 = 0
OPEN1 = 1
OPEN2 = 2
OPEN3 = 3
OPEN4 = 4
OPEN5 = 5
OPEN6 = 6
OPEN7 = 7
OPEN8 = 8
BLANK = 9
BOMBDEATH = 10
BOMBFLAGGED = 11
BOMBMISFLAGGED = 12
BOMBQUESTION = 13
BOMB = 14
sprite_sheet, palette = adafruit_imageload.load("/SpriteSheet.bmp",
bitmap=displayio.Bitmap,
palette=displayio.Palette)
display = board.DISPLAY
group = displayio.Group()
touchscreen = adafruit_touchscreen.Touchscreen(board.TOUCH_XL, board.TOUCH_XR,
board.TOUCH_YD, board.TOUCH_YU,
calibration=((9000, 59000),
(8000, 57000)),
size=(display.width, display.height))
tilegrid = displayio.TileGrid(sprite_sheet, pixel_shader=palette,
width=20, height=15,
tile_height=16, tile_width=16,
default_tile=BLANK)
group.append(tilegrid)
display.root_group = group
board_data = bytearray(b'\x00' * 300)
#pylint:disable=redefined-outer-name
def get_data(x, y):
return board_data[y * 20 + x]
def set_data(x, y, value):
board_data[y * 20 + x] = value
#pylint:disable=redefined-outer-name
def seed_bombs(how_many):
for _ in range(how_many):
while True:
bomb_x = randint(0, 19)
bomb_y = randint(0, 14)
if get_data(bomb_x, bomb_y) == 0:
set_data(bomb_x, bomb_y, 14)
break
def compute_counts():
"""For each bomb, increment the count in each non-bomb square around it"""
for y in range(15):
for x in range(20):
if get_data(x, y) != 14:
continue # keep looking for bombs
for dx in (-1, 0, 1):
if x + dx < 0 or x + dx >= 20:
continue # off screen
for dy in (-1, 0, 1):
if y + dy < 0 or y + dy >= 15:
continue # off screen
count = get_data(x + dx, y + dy)
if count == 14:
continue # don't process bombs
set_data(x + dx, y + dy, count + 1)
def reveal():
for x in range(20):
for y in range(15):
if tilegrid[x, y] == BOMBFLAGGED and get_data(x, y) != BOMB:
tilegrid[x, y] = BOMBMISFLAGGED
else:
tilegrid[x, y] = get_data(x, y)
#pylint:disable=too-many-nested-blocks
def expand_uncovered(start_x, start_y):
number_uncovered = 1
stack = [(start_x, start_y)]
while len(stack) > 0:
x, y = stack.pop()
if tilegrid[x, y] == BLANK:
under_the_tile = get_data(x, y)
if under_the_tile <= OPEN8:
tilegrid[x, y] = under_the_tile
number_uncovered += 1
if under_the_tile == OPEN0:
for dx in (-1, 0, 1):
if x + dx < 0 or x + dx >= 20:
continue # off screen
for dy in (-1, 0, 1):
if y + dy < 0 or y + dy >= 15:
continue # off screen
if dx == 0 and dy == 0:
continue # don't process where the bomb
stack.append((x + dx, y + dy))
return number_uncovered
#pylint:enable=too-many-nested-blocks
def check_for_win():
"""Check for a complete, winning game. That's one with all squares uncovered
and all bombs correctly flagged, with no non-bomb squares flaged.
"""
# first make sure everything has been explored and decided
for x in range(20):
for y in range(15):
if tilegrid[x, y] == BLANK or tilegrid[x, y] == BOMBQUESTION:
return None #still ignored or question squares
# then check for mistagged bombs
for x in range(20):
for y in range(15):
if tilegrid[x, y] == BOMBFLAGGED and get_data(x, y) != BOMB:
return False #misflagged bombs, not done
return True #nothing unexplored, and no misflagged bombs
#pylint:disable=too-many-branches
# This could be broken apart but I think it's more understandable
# with it all in one place
def play_a_game():
number_uncovered = 0
touch_x = -1
touch_y = -1
touch_time = 0
wait_for_release = False
while True:
now = time.monotonic()
if now >= touch_time:
touch_time = now + 0.2
# process touch
touch_at = touchscreen.touch_point
if touch_at is None:
wait_for_release = False
else:
if wait_for_release:
continue
wait_for_release = True
touch_x = max(min([touch_at[0] // 16, 19]), 0)
touch_y = max(min([touch_at[1] // 16, 14]), 0)
if tilegrid[touch_x, touch_y] == BLANK:
tilegrid[touch_x, touch_y] = BOMBQUESTION
elif tilegrid[touch_x, touch_y] == BOMBQUESTION:
tilegrid[touch_x, touch_y] = BOMBFLAGGED
elif tilegrid[touch_x, touch_y] == BOMBFLAGGED:
under_the_tile = get_data(touch_x, touch_y)
if under_the_tile == 14:
set_data(touch_x, touch_y, BOMBDEATH) #reveal a red bomb
tilegrid[touch_x, touch_y] = BOMBDEATH
return False #lost
elif OPEN0 < under_the_tile <= OPEN8:
tilegrid[touch_x, touch_y] = under_the_tile
elif under_the_tile == OPEN0:
tilegrid[touch_x, touch_y] = BLANK
number_uncovered += expand_uncovered(touch_x, touch_y)
else: #something bad happened
raise ValueError('Unexpected value on board')
status = check_for_win()
if status is None:
continue
return status
#pylint:enable=too-many-branches
def reset_board():
for x in range(20):
for y in range(15):
tilegrid[x, y] = BLANK
set_data(x, y, 0)
seed_bombs(NUMBER_OF_BOMBS)
compute_counts()
def play_sound(file_name):
try:
board.DISPLAY.refresh(target_frames_per_second=60)
except AttributeError:
board.DISPLAY.wait_for_frame()
wavfile = open(file_name, "rb")
wavedata = WaveFile(wavfile)
speaker_enable.value = True
audio.play(wavedata)
return wavfile
def wait_for_sound_and_cleanup(wavfile):
while audio.playing:
pass
wavfile.close()
speaker_enable.value = False
def win():
print('You won')
wait_for_sound_and_cleanup(play_sound('win.wav'))
def lose():
print('You lost')
wavfile = play_sound('lose.wav')
for _ in range(10):
tilegrid.x = randint(-2, 2)
tilegrid.y = randint(-2, 2)
try:
board.DISPLAY.refresh(target_frames_per_second=60)
except AttributeError:
board.DISPLAY.refresh_soon()
board.DISPLAY.wait_for_frame()
tilegrid.x = 0
tilegrid.y = 0
wait_for_sound_and_cleanup(wavfile)
while True:
reset_board()
if play_a_game():
win()
else:
reveal()
lose()
time.sleep(5.0)
Looking at the CIRCUITPY drive in your operating system file explorer/finder, you should see a listing similar to this with all the files loaded from this page and the previous page:
Page last edited April 16, 2025
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