def get_talk_time(minutes):
"""Setup talk time"""
display.scroll('A -1, B +1')
# clear press counters
button_a.get_presses()
button_b.get_presses()
quit_flag = False
while quit_flag is not True:
minutes = minutes - button_a.get_presses() \
+ button_b.get_presses()
display_minutes(int(minutes))
# To exit press a for 2 seconds
if button_a.is_pressed():
start = running_time()
while button_a.is_pressed():
if running_time() - start > 2000:
quit_flag = True
display.scroll(str(int(minutes)))
return minutes
def playGame(self):
microbit.display.scroll("WALK TO PICK UP ITEMS.")
pickup_amount = 4
while self.game_running:
self.startLevel(pickup_amount)
level_start_time = microbit.running_time() # Store the time when the user starts a level.
# Execute a traditional game loop.
while not self.isGameOver():
self.getInput()
self.update()
self.draw()
if self.isGameOver():
current_time = microbit.running_time() # Get the time at gameover.
seconds_elapsed = (current_time - level_start_time) / 1000 # Convert milliseconds to seconds.
# Display the time it took to complete the level, cut off any decimal places from the print-out.
microbit.display.scroll("TIME:" + str(int(seconds_elapsed)) + " SECONDS.")
pickup_amount += 1
sleep(100)
def playGame(self):
microbit.display.scroll("WALK TO PICK UP ITEMS.")
pickup_amount = 4
while self.game_running:
self.startLevel(pickup_amount)
level_start_time = microbit.running_time()
while not self.isGameOver():
self.getInput()
self.update()
self.draw()
if self.isGameOver():
current_time = microbit.running_time()
seconds_elapsed = (current_time - level_start_time) / 1000
microbit.display.scroll("TIME:" +
str(int(seconds_elapsed)) +
" SECONDS.")
pickup_amount += 1
sleep(100)
def get_distance():
np[7] = (0, 0, bright)
np.show()
timeout = False
start = microbit.running_time()
rising_edge = start
falling_edge = start
sonar.write_digital(0)
microbit.sleep(1000)
sonar.write_digital(1) # Send 10us pulse to trigger
microbit.sleep(0.01)
sonar.write_digital(0)
while sonar.read_digital() == 0 and not timeout:
rising_edge = microbit.running_time()
while sonar.read_digital() == 1 and not timeout:
falling_edge = microbit.running_time()
if timeout:
distance = 0
np[7] = (bright, 0, 0)
else:
pulse_width = falling_edge - rising_edge
distance = pulse_width * 17150
np[7] = (0, bright, 0)
np.show()
return int(distance)
def get_ident(wait=1000):
max_ident = 0
loading_display = microbit.Image(BLANK_IMAGE)
wait /= 25
configure_radio()
for pixel in sorted(range(25), key=lambda x: random.random()):
start = microbit.running_time()
message = radio.receive_bytes()
while message:
try:
sender, *_ = message
max_ident = max(max_ident, sender)
except ValueError:
pass
message = radio.receive_bytes()
loading_display.set_pixel(pixel % 5, pixel // 5, 9)
microbit.display.show(loading_display)
end = microbit.running_time() - start
if end < wait:
microbit.sleep(wait - end)
microbit.display.scroll("#{}".format(max_ident + 1))
return max_ident + 1
def animate_sin(operation):
brightness_max = 9
half_brightness_max = brightness_max / 2
two_pi = math.pi * 2
origo_x, origo_y = 2, 2
max_distance = hypot(origo_x, origo_y)
double_max_distance = max_distance * 2
offset = 0
last_t = microbit.running_time()
while True:
for x in range(0, 5):
dist_x = x - origo_x
for y in range(0, 5):
dist_y = y - origo_y
distance = (math.fabs(hypot(dist_x, dist_y)) /
double_max_distance)
distance = (distance + (offset / operation)) % 1
sin = math.sin(distance * two_pi - math.pi)
value = round(sin * half_brightness_max + half_brightness_max)
microbit.display.set_pixel(x, y, value)
t_now = microbit.running_time()
delta_t = t_now - last_t
offset += delta_t * 0.001
last_t = t_now
microbit.sleep(10)
def main():
"""Main function for the timer"""
# set the number minutes that your talk is to last for.
minutes = 1
# convert to the delay needed to turn off each LED
delay = minutes_to_delay(minutes)
start_up_screen()
show_power_on()
radio.on()
while True:
received_message = radio.receive()
delay_from_remote = message_to_delay(received_message)
if delay_from_remote >= 0:
delay = delay_from_remote
count_down(delay)
get_ready_to_go_again()
# Show number of mins
display_minutes(delay_to_minutes(delay))
# To enter demo mode press button a for > 2 secs
if button_b.is_pressed():
start = running_time()
while button_b.is_pressed():
pass
if running_time() - start > 2000:
delay = minutes_to_delay(15 / 60)
display.scroll('Talk 15 secs')
if button_a.is_pressed():
delay = minutes_to_delay(get_talk_time(delay_to_minutes(delay)))
start_up_screen()
display_minutes(delay_to_minutes(delay))
if accelerometer.current_gesture() == 'shake':
send_message = True
while accelerometer.current_gesture() == 'shake':
delay_from_remote = message_to_delay(received_message)
if delay_from_remote >= 0:
delay = delay_from_remote
send_message = False
if send_message:
radio.send(SHAKY_ID + ' ' + 'start ' + str(delay))
count_down(delay)
get_ready_to_go_again()
def test_timing():
# test that speech takes the correct amount of time over many runs
print('Testing timing of say function')
for i in range(5):
start = microbit.running_time()
speech.say('hello world')
microbit.sleep(1)
stop = microbit.running_time()
assert 800 < stop - start < 815
def noise(length_ms):
"""Random noise"""
end_time = round(microbit.running_time() + length_ms)
while microbit.running_time() < end_time:
microbit.pin0.write_digital(microbit.random(2))
music.stop()
def main():
data_sent = 0
state = GET_DATA_NUM
while True:
# State 0
if state == GET_DATA_NUM:
data_num = 1
attempt = 0
while True:
cy, cx = divmod(data_num-1, 5) # Cursor x and y depending on the data_num
display.set_pixel(cx, cy, 9)
if button_a.is_pressed() and button_b.is_pressed():
state = READY_TO_SAMPLE # TODO: Change state to some other state
data_sent = 0
sleep(500)
break
elif button_a.is_pressed():
if data_num > 1:
display.set_pixel(cx, cy, 0) # Clear LED pixel if data_num > 1
data_num = data_num - 1 if (data_num > 1) else 1
elif button_b.is_pressed():
data_num = data_num + 1 if (data_num < MAX_FILES_NUM) else MAX_FILES_NUM
sleep(200)
# State 1
elif state == READY_TO_SAMPLE:
while True:
if button_a.is_pressed():
state = SAMPLE_DATA
break
elif button_b.is_pressed():
display.clear()
cy, cx = divmod(data_num-data_sent-1, 5)
setPixelTill(cx, cy, 9)
else:
display.show(Image.ARROW_W)
sleep(200)
# State 2
elif state == SAMPLE_DATA:
countdown(3)
display.show(Image.TARGET)
with open("file_{}.csv".format(data_sent), "w") as data_file:
data_file.write("x,y,z\n")
initial_time = running_time()
while (running_time()-initial_time) < SAMPLE_DURATION:
t0 = running_time()
data_file.write("{},{},{}\n".format(*accelerometer.get_values()))
t_diff = running_time()-t0
sleep(0 if (SAMPLE_PERIOD-t_diff)<0 else SAMPLE_PERIOD-t_diff)
data_sent += 1
if (data_num-data_sent)>0:
state = READY_TO_SAMPLE
else:
state = EXIT
# State 3
elif state == EXIT:
display.show(Image.HAPPY)
break
def test_timing():
# test that speech takes the correct amount of time over many runs
print('Testing timing of say function')
for i in range(5):
start = microbit.running_time()
speech.say('hello world')
microbit.sleep(1)
stop = microbit.running_time()
assert 800 < stop - start < 815
def process_local_generated_events():
if button_b.was_pressed():
send_and_expect_response(RESET_MESSAGE)
elif button_a.was_pressed():
send_and_expect_response(ALERT_MESSAGE)
elif status['status'] != ALERT_MESSAGE:
if running_time() > status['last_reset'] + ALERT_DELAY:
send_and_expect_response(ALERT_MESSAGE)
if running_time() > status['last_heartbeat'] + HEARTBEAT_PERIOD:
send_and_expect_response(HEARTBEAT_MESSAGE)
def play(self, pattern, kit=None):
if kit:
self.midiout.program_change(kit, ch=self.channel)
# give MIDI instrument some time to load drumkit
sleep(300)
while True:
last_tick = running_time()
pattern.playstep(self.midiout, self.channel)
timetowait = max(0, self.mpq - (running_time() - last_tick))
if timetowait > 0:
sleep(timetowait)
def wait_for_change(timeout=500):
t_start = microbit.running_time()
while microbit.running_time() < t_start + timeout:
if i2c_read(I2C_ADDR, 0x00)[0] & 1: # Read status register
button_state = i2c_read(I2C_ADDR, 0x03)[0] # Read input states
i2c_write(I2C_ADDR, 0x00, 0x00) # Clear status register
states = {}
for x in range(6):
states[x] = (button_state & (1 << x)) > 0
return states
return None
def reset(msg):
global position, last_proc, speed, map_position, obstacles, vspeed
global max_obstacles, start_time
obstacles = set()
map_position = 0
speed = 1.0
vspeed = 0
position = 2
last_proc = microbit.running_time()
microbit.display.scroll(msg)
microbit.sleep(1000)
max_obstacles = 5
start_time = microbit.running_time()
def sensors():
global timer1, ___numberVar, ___booleanVar, ___stringVar, ___imageVar, ___numberList, ___booleanList, ___stringList, ___imageList
microbit.display.scroll(str(microbit.button_a.is_pressed()))
microbit.display.scroll(str(microbit.button_b.is_pressed()))
microbit.display.scroll(
str("up" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(
str("down" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(
str("face down" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(
str("face up" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(
str("shake" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(
str("freefall" == microbit.accelerometer.current_gesture()))
microbit.display.scroll(str(microbit.compass.heading()))
microbit.display.scroll(str((microbit.running_time() - timer1)))
timer1 = microbit.running_time()
microbit.display.scroll(str(microbit.temperature()))
microbit.display.scroll(str(microbit.pin0.is_touched()))
microbit.display.scroll(str(microbit.pin1.is_touched()))
microbit.display.scroll(str(microbit.pin2.is_touched()))
microbit.display.scroll(str(microbit.pin0.read_analog()))
microbit.display.scroll(str(microbit.pin1.read_analog()))
microbit.display.scroll(str(microbit.pin2.read_analog()))
microbit.display.scroll(str(microbit.pin3.read_analog()))
microbit.display.scroll(str(microbit.pin4.read_analog()))
microbit.display.scroll(str(microbit.pin10.read_analog()))
microbit.display.scroll(str(microbit.pin0.read_digital()))
microbit.display.scroll(str(microbit.pin1.read_digital()))
microbit.display.scroll(str(microbit.pin2.read_digital()))
microbit.display.scroll(str(microbit.pin3.read_digital()))
microbit.display.scroll(str(microbit.pin4.read_digital()))
microbit.display.scroll(str(microbit.pin5.read_digital()))
microbit.display.scroll(str(microbit.pin6.read_digital()))
microbit.display.scroll(str(microbit.pin7.read_digital()))
microbit.display.scroll(str(microbit.pin8.read_digital()))
microbit.display.scroll(str(microbit.pin9.read_digital()))
microbit.display.scroll(str(microbit.pin10.read_digital()))
microbit.display.scroll(str(microbit.pin11.read_digital()))
microbit.display.scroll(str(microbit.pin12.read_digital()))
microbit.display.scroll(str(microbit.pin13.read_digital()))
microbit.display.scroll(str(microbit.pin14.read_digital()))
microbit.display.scroll(str(microbit.pin15.read_digital()))
microbit.display.scroll(str(microbit.pin16.read_digital()))
microbit.display.scroll(str(microbit.pin19.read_digital()))
microbit.display.scroll(str(microbit.pin20.read_digital()))
microbit.display.scroll(str(microbit.accelerometer.get_x()))
microbit.display.scroll(
str(round(microbit.display.read_light_level() / 2.55)))
def Ultrasonic_ranging():
Trig, Echo = pin12, pin13
global Distance
start_time = 0
if (running_time() - start_time > 100):
Trig.write_digital(0)
Trig.write_digital(1)
utime.sleep_us(2)
Trig.write_digital(0)
t1 = time_pulse_us(Echo, 1, 5000)
t2 = t1 / 1000000
print("\r" + ":{:5.2f}cm".format(t2 * 34300 / 2), end='')
Distance = int(t2 * 34300 / 2)
start_time = running_time()
def count_claps():
t = running_time()
lastr = 900
claps = 0
while running_time() - t < 1000:
r = pin0.read_analog()
if lastr > 500 and r < 100:
t = running_time()
sleep(100)
elif lastr < 100 and r > 500:
t = running_time()
sleep(100)
claps += 1
lastr = r
return claps
def waitForACK(timer=2000, pooling_interval=10):
"""
Waits for acknowledgement for given amount of time
@param timer : Maximum waiting time for the acknowledgement
@param pooling_interval : Interval to check for acknowledgement
@returns : Received acknowledgement
NACK for timeout
"""
initial_time = running_time()
while (running_time() - initial_time) < timer:
response = radio.receive()
if response is not None:
return response
sleep(pooling_interval)
return NACK
def fx(length_ms, pitch, delta_pitch, steps_count):
"""Produce sound effect shifting pitch by delta_pitch in steps_count steps"""
end_time = round(microbit.running_time() + length_ms)
step_length_ms = round(length_ms / steps_count)
while microbit.running_time() < end_time:
if pitch > 0:
music.pitch(round(pitch))
microbit.sleep(step_length_ms)
pitch += delta_pitch
steps_count -= 1
music.stop()
def heartbeat():
status['last_heartbeat'] = running_time()
throb_base = Image('90000:00000:00000:00000:00000')
throb = [throb_base * (i / 9) for i in range(1, 9)]
throb += [throb_base * (i / 9) for i in range(8, -1, -1)]
display.show(throb, delay=100, wait=False, loop=False, clear=False)
def game_over(dry_time):
score = str(int((microbit.running_time() - dry_time) / 1000))
while True:
display.show(Image.SAD)
sleep(2000)
display.scroll("Score: " + score)
return
def play(self, pattern, kit=None):
# channel volume
self.midiout.control_change(10, self.volume, ch=self.channel)
self.activate_drumkit(kit)
# give MIDI instrument some time to load drumkit
sleep(300)
try:
while True:
last_tick = running_time()
pattern.playstep(self.midiout, self.channel)
timetowait = max(0, self.mpt - (running_time() - last_tick))
if timetowait > 0:
sleep(timetowait)
finally:
# all sound off
self.midiout.control_change(120, 0)
def reset():
display.clear()
status.update({
'showing_error': False,
'last_reset': running_time(),
'last_heartbeat': 0,
'status': HEARTBEAT_MESSAGE,
})
def send():
display.clear()
radio.on()
radio.config(channel=90, power=4)
if "sample.raw" in os.listdir():
gen = sample_generator("sample.raw")
else:
gen = sawtooth_generator()
start = running_time()
sent = 0
for f in gen:
# One frame every 4ms = 8kHz
while sent > ((running_time() - start) >> 2) + 3:
sleep(1)
radio.send_bytes(f)
sent += 1
print(sent)
def send():
display.clear()
radio.on()
radio.config(channel=90, power=4)
if "sample.raw" in os.listdir():
gen = sample_generator("sample.raw")
else:
gen = sawtooth_generator()
start = running_time()
sent = 0
for f in gen:
# One frame every 4ms = 8kHz
while sent > ((running_time() - start) >> 2) + 3:
sleep(1)
radio.send_bytes(f)
sent += 1
print(sent)
def main():
state = READY
while True:
# Ready state
if state == READY:
while True:
if button_a.is_pressed():
state = SAMPLE_DATA
break
elif button_b.is_pressed():
radio.on()
radio.send("done")
radio.off()
else:
display.show(Image.ARROW_W)
sleep(100)
# Sample Data state
elif state == SAMPLE_DATA:
data_sent = 0 # Reset data sent value
countdown(3) # Show countdown on the Microbit LED
display.show(Image.TARGET)
radio.on()
initial_time = running_time()
while (running_time() - initial_time) < SAMPLE_DURATION:
t0 = running_time()
if data_sent == 0: # Turn off all Microbit LEDs
display.clear()
cx, cy = divmod(
data_sent,
5) # Get current LED pixel coordinate of the BBC Microbit
radio.send(str(accelerometer.get_values()))
display.set_pixel(4 - cx, cy, 9)
data_sent = 0 if data_sent >= 24 else data_sent + 1 # Increase and limit data_sent value within 0-24 range
wait_t = SAMPLE_INTERVAL - (running_time() - t0
) # Time till next sample
if (wait_t > 0):
sleep(wait_t)
radio.send("done")
radio.off()
state = READY
# Exit state
elif state == EXIT:
display.show(Image.HAPPY)
return 0
sleep(100)
def wait_and_display_pwm(self, duty_cycle_value, on_time):
start = microbit.running_time()
width = round(on_time / 15)
hits = range(0, width, round(DUTY_100PC / duty_cycle_value))
points = [('#' if i in hits else '.') for i in range(width)]
while True:
microbit.sleep(1)
duration = microbit.running_time() - start
progress_left = 1 - (duration / on_time)
points_left = int((width * progress_left)) + 1
while points and len(points) > points_left:
point = points.pop(0)
print(point, end='', flush=True)
if duration >= on_time:
break
print()
def variable_requested(var):
global next_var_requested_time
requested = False
now = running_time()
if now > next_var_requested_time:
requested = True
next_var_requested_time = now + 20000
print("Hub to Node -> Command: {}".format(var))
return requested
def variable_changed(var):
global next_var_checked_time
changed = False
now = running_time()
if now > next_var_checked_time:
changed = True
next_var_checked_time = now + 15000
print("Hub to Node -> Command: {}".format(var))
return changed
def wait_and_display_pwm(self, duty_cycle_value, on_time):
start = microbit.running_time()
width = round(on_time / 15)
hits = range(0, width, round(DUTY_100PC / duty_cycle_value))
points = [('#' if i in hits else '.') for i in range(width)]
while True:
microbit.sleep(1)
duration = microbit.running_time() - start
progress_left = 1 - (duration / on_time)
points_left = int((width * progress_left)) + 1
while points and len(points) > points_left:
point = points.pop(0)
print(point, end='', flush=True)
if duration >= on_time:
break
print()
def command_received(cmd):
global next_cmd_time
received = False
now = running_time()
if now > next_cmd_time:
received = True
next_cmd_time = now + 5000
print("Hub to Node -> Command: {}".format(cmd))
return received
def setting_mode(threshold):
while (button_a.is_pressed() or button_b.is_pressed()):
display.show(Image.CLOCK12)
sleep(300)
display.show(Image.CLOCK3)
sleep(300)
display.show(Image.CLOCK6)
sleep(300)
display.show(Image.CLOCK9)
sleep(300)
display.clear()
display.show(threshold)
sleep(300)
display.show(Image.ARROW_E)
sleep(400)
display.show(Image.ARROW_W)
sleep(400)
display.clear()
last_click = running_time()
while (running_time() < last_click + 5000):
if button_b.was_pressed():
last_click = running_time()
threshold = threshold + 1
display.show(Image.ARROW_N)
sleep(300)
display.show(threshold)
sleep(300)
display.clear()
if button_a.was_pressed():
last_click = running_time()
threshold = threshold - 1
display.show(Image.ARROW_S)
sleep(300)
display.show(threshold)
sleep(300)
display.clear()
tfile = open("tstore", "w")
tfile.write(str(threshold))
tfile.close()
display.show(Image.YES)
sleep(700)
display.clear()
return (threshold)
def should_move_ball():
now = mb.running_time()
previous = state["ball_update"]
delta = now - previous
if state["ball_pos"] and delta > TIME_INCREMENT:
state["ball_update"] = now
return True
else:
return False
def play(location):
display.show(Image.ALL_CLOCKS, delay=50, loop=True, wait=False)
number = random.randrange(1, 10000)
sleep(random.randrange(10, 500))
radio.send(str(number))
sleep(3000)
numbers = []
while True:
message = radio.receive()
if not message:
break
numbers.append(int(message))
if number < min(numbers):
location = "UNKNOWN"
radio.off()
display.show(Image.ARROW_E)
seconds = 0
start_time = running_time()
button_b.was_pressed()
while seconds < 8 * 60:
if accelerometer.was_gesture("shake"):
minutes = seconds // 60
display.scroll("{0}:{1:02d}".format(minutes, seconds - minutes * 60))
if button_b.was_pressed():
display.scroll(location.upper())
sleep(10)
seconds = (running_time() - start_time) // 1000
animation = [Image.SKULL, Image()]
display.show(animation, delay=500, loop=True, wait=False)
while True:
sleep(10000)
display.off()
def read_sequence():
display.show(Image("0:0:35753:0:0"))
start = running_time()
for i in range(len(sequence)):
move = read_move()
while not move:
move = read_move()
# check time
if running_time() - start > (i + 1) * 5000:
game_over("timeout")
# is the move correct?
if move == sequence[i]:
display.show(ICONS[move])
sleep(500)
display.show(Image("0:0:34543:0:0"))
sleep(300)
else:
game_over(sequence[i])
def wait(self):
# """Wait for something to happen."""
while True:
if self.check_death():
break
self.check_gesture()
self.check_button()
current = microbit.running_time()
delta = current - self.last_time
if delta > INTERVAL:
self.last_time = current
self.tick()
# Note: The Microbit uses different indexing for LEDs
microbit.display.set_pixel(column, row, leds[row][column])
#display_leds = display_leds_image_string
display_leds = display_leds_image_array
#display_leds = display_leds_set_pixel
def waves(delay):
for offset in range(1000):
for row in range(5):
for column in range(5):
x = (row + offset) % 8 / 4 * math.pi
leds[row][column] = int(
math.sin(x) * 4 + 4)
display_leds()
microbit.sleep(delay)
offset += 1
#print ('Offset: %i' % offset)
#print ('Offset: {}'.format(offset))
if microbit.button_a.is_pressed():
delay = max(0, delay - 10)
if microbit.button_b.is_pressed():
delay += 10
#waves(100)
t0 = microbit.running_time()
waves(0)
t1 = microbit.running_time()
print ('Ran for %i ms' % (t1 - t0))
def sleep(millis):
t = microbit.running_time()
while microbit.running_time() < t + millis:
check_input()
yield
player_x = 2
wall_y = -1
hole = 0
score = 0
handled_this_wall = False
wall_speed = wall_min_speed
player_speed = player_min_speed
wall_next = 0
player_next = 0
while True:
t = m.running_time()
player_update = t >= player_next
wall_update = t >= wall_next
if not (player_update or wall_update):
next_event = min(wall_next, player_next)
delta = next_event - t
m.sleep(delta)
continue
if wall_update:
# calculate new speeds
speed = min(score, speed_max)
wall_speed = wall_min_speed + int((wall_max_speed - wall_min_speed) * speed / speed_max)
player_speed = player_min_speed + int((player_max_speed - player_min_speed) * speed / speed_max)
wall_next = t + wall_speed
def sleep(msecs):
t = microbit.running_time()
while microbit.running_time() < t + msecs:
yield
radio.config(channel=90, queue=12)
count = -1
def gen():
recvd = audio.AudioFrame()
empty = audio.AudioFrame()
while True:
if radio.receive_bytes_into(recvd) == 32:
yield recvd
else:
yield empty
if button_a.is_pressed() and button_b.is_pressed():
return
audio.play(gen())
while True:
message = "Press button a to send 'sample.raw' or sawtooth wave. Press button b to play received waveform. Press both buttons to stop."
display.scroll(message, delay=100, wait=False)
message_end = running_time() + len(message)*600
if button_a.is_pressed() and button_b.is_pressed():
break
while True:
sleep(50)
if button_a.is_pressed():
send()
break
if button_b.is_pressed():
play()
break
if running_time() > message_end:
break
exposure = 4.0 # seconds
frame_wait_ms = int(1000*exposure/number_of_columns)
# image that contains window of the banner
image = microbit.Image(5, 5)
# current banner ptr
banner_ptr = 0
banner_ptr_end = len(banner)
# main loop
while True:
start_frame_ms = microbit.running_time()
# display current banner window
ptr = banner_ptr
for y in range(5):
for x in range(5):
image.set_pixel(y, 4-x, banner[ptr])
ptr += 1
# wrap around
if ptr >= banner_ptr_end:
ptr = 0
# display the image
microbit.display.show(image)
ALL_SPOTS = frozenset(
{(x, y) for x in range(0, MAX_X) for y in range(0, MAX_Y)})
while True:
snake_x = 0
snake_y = 0
snake_tail = []
# up = 0, right = 1, down = 2, left = 3
direction = 1
apple_x = snake_x
apple_y = snake_y
apple_time = microbit.running_time()
score = -1
microbit.display.clear()
while True:
a_was_pressed = microbit.button_a.was_pressed()
b_was_pressed = microbit.button_b.was_pressed()
if (snake_x, snake_y) == (apple_x, apple_y):
score += 1
spots = list(ALL_SPOTS - set(snake_tail) - {(snake_x, snake_y)})
if spots:
apple_x, apple_y = random.choice(spots)
apple_time = microbit.running_time()
