.. _quickref: pyboard快速参考 =============================== 下面的引脚图是 PYBv1.0. pyboard其他版本的见： `PYBv1.1 `__ `PYBLITEv1.0-AC `__ `PYBLITEv1.0 `__. .. image:: http://micropython.org/resources/pybv10-pinout.jpg :alt: PYBv1.0 pinout :width: 700px 通用硬件控制 --------------------- See :mod:`pyb`. :: import pyb pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)在UART（1）上重置REPL pyb.wfi() # pause CPU, waiting for interrupt 暂停cpu，等待中断 pyb.freq() # get CPU and bus frequencies 获得CPU频率 pyb.freq(60000000) # set CPU freq to 60MHz 设置CPU频率 pyb.stop() # stop CPU, waiting for external interrupt 停止cpu，等待外部中断 延时和时间 ---------------- Use the :mod:`time ` module:: import time time.sleep(1) # sleep for 1 second 延时1s time.sleep_ms(500) # sleep for 500 milliseconds 延时500ms time.sleep_us(10) # sleep for 10 microseconds 延时10us start = time.ticks_ms() # get value of millisecond counter 获取毫秒计数器的值 delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference 计算时间差 LED 发光二极管 ---- See :ref:`pyb.LED `. :: from pyb import LED led = LED(1) # 红色 led led.toggle() led.on() led.off() Pins and GPIO ------------- See :ref:`pyb.Pin `. :: from pyb import Pin p_out = Pin('X1', Pin.OUT_PP) p_out.high() p_out.low() p_in = Pin('X2', Pin.IN, Pin.PULL_UP) p_in.value() # get value, 0 or 1 舵机控制 ------------- See :ref:`pyb.Servo `. :: from pyb import Servo s1 = Servo(1) # servo on position 1 (X1, VIN, GND) 位置1的servo(X1) s1.angle(45) # move to 45 degrees s1.angle(-60, 1500) # move to -60 degrees in 1500ms 在1500ms内移动到-60度 s1.speed(50) # for continuous rotation servos 连续旋转舵机 外部中断 ------------------- See :ref:`pyb.ExtInt `. :: from pyb import Pin, ExtInt callback = lambda e: print("intr") ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback) 定时器 ------ See :ref:`pyb.Timer `. :: from pyb import Timer tim = Timer(1, freq=1000) tim.counter() # get counter value 获取计时器值 tim.freq(0.5) # 0.5 Hz tim.callback(lambda t: pyb.LED(1).toggle()) PWM脉宽调制 ---------------------------- See :ref:`pyb.Pin ` and :ref:`pyb.Timer `. :: from pyb import Pin, Timer p = Pin('X1') # X1 has TIM2, CH1 tim = Timer(2, freq=1000) ch = tim.channel(1, Timer.PWM, pin=p) ch.pulse_width_percent(50) ADC (模数转换) ---------------------------------- See :ref:`pyb.Pin ` and :ref:`pyb.ADC `. :: from pyb import Pin, ADC adc = ADC(Pin('X19')) adc.read() # read value,读取值 0-4095 DAC (数模转换) ---------------------------------- See :ref:`pyb.Pin ` and :ref:`pyb.DAC `. :: from pyb import Pin, DAC dac = DAC(Pin('X5')) dac.write(120) # 输出介于0-255 UART (串行总线) ----------------- See :ref:`pyb.UART `. :: from pyb import UART uart = UART(1, 9600) uart.write('hello') uart.read(5) # read up to 5 bytes 读取5个字节 SPI总线 ------- See :ref:`pyb.SPI `. :: from pyb import SPI spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0) spi.send('hello') spi.recv(5) # receive 5 bytes on the bus 在总线上接收5个字节 spi.send_recv('hello') # send and receive 5 bytes 发送5个字节 I2C bus ------- See :ref:`pyb.I2C `. :: from pyb import I2C i2c = I2C(1, I2C.MASTER, baudrate=100000) i2c.scan() # returns list of slave addresses 返回一个从属设备地址的列表 i2c.send('hello', 0x42) # send 5 bytes to slave with address 0x42 使用0x42地址向从属设备发送5个字节 i2c.recv(5, 0x42) # receive 5 bytes from slave 从从属设备上接收5个字节 i2c.mem_read(2, 0x42, 0x10) # read 2 bytes from slave 0x42, slave memory 0x10 从地址为0x42从属设备上接收2个字节，从属存储器为0x10 i2c.mem_write('xy', 0x42, 0x10) # write 2 bytes to slave 0x42, slave memory 0x10 向地址为0x42的从属设备写入2个字节，从属存储器为0x10