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Content import gpio import leds import utime import display import color import buttons import vibra # Change the starting player parameter two false # on the other board. start_player = True pin_tx = gpio.WRISTBAND_3 pin_rx = gpio.WRISTBAND_4 led_recv = leds.BOTTOM_RIGHT led_send = leds.BOTTOM_LEFT baud = 0.01 # not really but more time length of one bit disp = display.open() disp.print('niotacin', posx=20, fg=color.COMMYELLOW) disp.print('pmaC', fg=color.CAMPGREEN, posy=20) disp.update() # buffer for received bits recvd = [] # position, velocity of the player. # delay between led updates. pos, vel, delay_ms = 0, 0, 255 gpio.set_mode(pin_rx, gpio.mode.INPUT | gpio.mode.PULL_UP) def tx_on(): leds.set(led_send, color.CAMPGREEN) gpio.set_mode(pin_tx, gpio.mode.OUTPUT) gpio.write(pin_tx, False) def tx_off(): leds.set(led_send, color.BLACK) gpio.set_mode(pin_tx, gpio.mode.INPUT) def check_tx(): return gpio.get_mode(pin_tx) == gpio.mode.OUTPUT def check_rx(): val = gpio.read(pin_rx) == 0 leds.set(led_recv, color.CAMPGREEN if val else color.BLACK) return val def display_input_buffer(): 'Currently no used but good for debugging.' global disp, recvd disp.clear() s = '' for i in recvd: s += str(i) disp.print(s) disp.print(str(recvd_int()), posy=20) leds.set(0, [i,0,0]) disp.update() def startbit_found(): return check_rx() def receive_byte(): global recvd utime.sleep(0.5 * baud) # waiting for databits recvd = [] for _ in range(8): utime.sleep(baud) if check_rx(): recvd.append(1) else: recvd.append(0) utime.sleep(baud) # waiting for stopbit leds.set(led_recv, color.BLACK) def recvd_int(): 'Convert the bits in the buffer into a byte.' s = '' for i in recvd: s += str(i) return int('0b'+s, 2) def tx_byte(byte): tx_on() # Startbit utime.sleep(baud) for x in range(7,-1,-1): if (byte & (1<<x)) == (1<<x): tx_on() else: tx_off() utime.sleep(baud) tx_off() # Stopbit utime.sleep(5*baud) def handle_input(): global vel, delay_ms if buttons.read(buttons.BOTTOM_LEFT) != 0 and pos >= 8 and vel > 0: vel = -vel if pos == 8: delay_ms = delay_ms elif pos == 9: delay_ms = int(delay_ms * 0.5) def start_game(starting_player): global pos, vel, delay_ms width = 11 # leds if starting_player: pos, vel = width - 1, -1 else: # pos=-1 indicating the ball is on the other board. pos, vel = -1, 0 col = color.CAMPGREEN while True: handle_input() #print('pos vel', pos, vel) pos += vel if pos < 0 and vel != 0: tx_byte(delay_ms) pos, vel = -1, 0 if pos >= width - 1: vel = -vel vibra.vibrate(60) # await if startbit_found(): receive_byte() delay_ms = recvd_int() pos, vel = 0, 1 # draw leds.clear() if pos >= 0: leds.set(pos, col) utime.sleep_ms(delay_ms) tx_off() start_game(starting_player=start_player)