1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 | import machine from machine import Pin import utime CP = Pin( 12 , Pin.OUT) CE = Pin( 13 , Pin.OUT) PL = Pin( 14 , Pin.OUT) Q7 = Pin( 15 , Pin.IN) data = [] p18 = Pin( 18 , Pin.OUT) p18.on() # 禁用时钟 CE.on() # 接收外部信号到芯片 PL.off() # 给1毫秒时间让信号传输进芯片,防止锁定太快 utime.sleep( 0.001 ) # 锁定信号数据 PL.on() # 启用时钟 CE.off() # 数据长度 74HC165级联数*8 data_len = 2 * 8 for i in range (data_len): # 读取当前串口信号 data_tmp = Q7.value() data.append(data_tmp) # 给时钟发射一个脉冲,准备下一位串口信号 CP.on() CP.off() print (data) # [1, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0] |