使用 SNES 控制器

#1

SNES（任天堂）是1992年发布的游戏机，早期的手柄使用了2个 4021 移位寄存器连接到12个按键。我们很容易就可以将它连接到micro:bit上：

http://www.multiwingspan.co.uk/micro.php?page=snes

代码：全选

from microbit import *

class SNES:
    # set up which micro:bit pins to use
    def __init__(self, latch, clock, data):
        self.latch = latch
        self.clock = clock
        self.data = data
    # take a reading and return a 16bit integer
    def getReading(self):
        self.latch.write_digital(1)
        self.latch.write_digital(0)
        word = 0
        for i in range(16):
            self.clock.write_digital(0)
            word = word + (self.data.read_digital()&lt;&lt;i)   
            self.clock.write_digital(1)
        return word
    # create and return dictionary of button names and the readings    
    def info(self):
        reading = self.getReading()
        keys = ["0","0","0","0","RSH","LSH","X","A","R","L","D","U","Start","Select","Y","B"]
        bits = [reading &gt;&gt; i &amp; 1 for i in range(15,-1,-1)]
        return dict(zip(keys,bits))
    # create and return a list of buttons that have been pressed
    def pressed(self):
        d = self.info()
        output = []
        for k in d:
            if d[k]!=1:
                output.append(k)
        return output