Micropython | Pyboard 小车

pyboard 参考图

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from pyb import UART

baudrate = 38400
uart = UART(1, baudrate)

串口对应GPIO

• UART(4) is on XA: (TX, RX) = (X1, X2) = (PA0, PA1)
• UART(1) is on XB: (TX, RX) = (X9, X10) = (PB6, PB7)
• UART(6) is on YA: (TX, RX) = (Y1, Y2) = (PC6, PC7)
• UART(3) is on YB: (TX, RX) = (Y9, Y10) = (PB10, PB11)
• UART(2) is on: (TX, RX) = (X3, X4) = (PA2, PA3)

uart.init(baudrate, bits=8, parity=None, stop=1, *, timeout=1000, flow=None, timeout_char=0, read_buf_len=64)

• baudrate：波特率
• bits：数据位，7/8/9
• parity：校验，None, 0 (even) or 1 (odd)
• stop：停止位，1/2
• flow：流控，可以是 None, UART.RTS, UART.CTS or UART.RTS | UART.CTS
• timeout：读取一个字节的超时时间（ms）
• timeout_char：两个字节之间超时时间

uart.write()
uart.read([num_of_bytes])

PWM

motor = Timer(5, freq=2000).channel(3, Timer.PWM, pin=Pin.board.X3)

Timer(nclock, freq)
Timer.channel(channel, mode, pin)
这里的参数参考第一张图

motor.pulse_width_percent(50)

从 0 到 50