pyboard 快速参考手册

闪电

pyboard 的快速参考

以下引脚分配适用于 PYBv1.1。您还可以查看其他版本的 pyboard 的引脚排列： PYBv1.0 或PYBLITEv1.0-AC 或 PYBLITEv1.0.

下面是 pyboard 的快速参考。如果这是您第一次使用该板，请考虑先阅读以下部分：

• 关于 pyboard 的一般信息
• pyboard 的 MicroPython 教程
  

通用板控制

见 pyb.

1. import pyb
   
2. 
   
3. pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
   
4. pyb.wfi() # pause CPU, waiting for interrupt
   
5. pyb.freq() # get CPU and bus frequencies
   
6. pyb.freq(60000000) # set CPU freq to 60MHz
   ; ^- U' ]6 k$ q$ q. z
7. pyb.stop() # stop CPU, waiting for external interrupt

复制代码

延迟和计时

使用 time模块：

1. import time
   
2. 
   * S, X$ E/ _) ~3 t" t6 C
3. time.sleep(1)           # sleep for 1 second
   ' D6 M' W% r  v
4. time.sleep_ms(500)      # sleep for 500 milliseconds
   
5. time.sleep_us(10)       # sleep for 10 microseconds
   
6. start = time.ticks_ms() # get value of millisecond counter
   
7. delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference

复制代码

" m3 f& i9 w- H+ X' c; w( P
8 x2 x2 c0 B5 a) W内部 LED

见 pyb.LED.

1. from pyb import LED
   
2. 
   : {5 i! {9 m2 D; Q+ ^3 b
3. led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
   
4. led.toggle()
   0 K% i2 }* g$ q, x  V  y. U/ [* N
5. led.on()
   7 B' r5 H- L9 S. A
6. led.off()
   * P8 z$ S0 S* W+ e9 ^
7. 
   * u; Z& I$ ?; n3 T$ @2 E) T
8. # LEDs 3 and 4 support PWM intensity (0-255)
   
9. LED(4).intensity()    # get intensity
   
10. LED(4).intensity(128) # set intensity to half

复制代码

4 n/ ^- W' [3 i
6 l( U3 ?- A/ S1 Y内部开关

请参阅 pyb.Switch.

1. from pyb import Switch
   
2. 
   7 ^% U8 S; f- R& [- A
3. sw = Switch()
   
4. sw.value() # returns True or False
   ; m2 g6 L4 s6 N! j3 Y
5. sw.callback(lambda: pyb.LED(1).toggle())

复制代码

6 f2 Z" U- `/ e+ x+ I& c
5 f4 j) }. q  Q& r0 t- L( B. n: _引脚和 GPIO

请参阅 pyb.Pin.

1. from pyb import Pin
   5 z- i6 I: \* [! R! i9 [* U
2. 
   
3. p_out = Pin('X1', Pin.OUT_PP)
   
4. p_out.high()
   
5. p_out.low()
   - M! q% U2 g! Y2 a. o& }% @5 O( f
6. 
   8 [; t" H" Q; h+ @
7. p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
   * o: i- T! \9 k1 f3 i6 t
8. p_in.value() # get value, 0 or 1

复制代码

% e  r3 f2 M8 u/ {5 s' @伺服控制

请参阅pyb.Servo.

1. from pyb import Servo
   
2. 
   
3. s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
   . ^) C" r6 h7 P, X& `: k5 W
4. s1.angle(45) # move to 45 degrees
     K: Q0 J( u) h$ _
5. s1.angle(-60, 1500) # move to -60 degrees in 1500ms
   2 G6 l: J& y& W
6. s1.speed(50) # for continuous rotation servos

复制代码

- F: c$ y8 r( W  J外部中断

请参阅 pyb.ExtInt.

1. from pyb import Pin, ExtInt
   * _* v' Q: n: }9 _' W$ n! @
2. 
   $ ]* L( |! `; ?2 Z8 @
3. callback = lambda e: print("intr")
   . n9 _2 V4 U* [
4. ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

复制代码

* f4 E, ~" U: }2 u! \) u" b. f
$ _/ ]) }& q. i; J8 ~$ G% n计时器

请参阅pyb.Timer.

1. from pyb import Timer
   
2. 
   $ Z3 ~6 `  G1 H8 N
3. tim = Timer(1, freq=1000)
   
4. tim.counter() # get counter value
   1 F/ \- o" S8 Y2 X  I+ \$ \
5. tim.freq(0.5) # 0.5 Hz
   
6. tim.callback(lambda t: pyb.LED(1).toggle())

复制代码

9 T% j$ X+ t# Y) jRTC（实时时钟）

请参阅 pyb.RTC

1. from pyb import RTC
   ( l! E7 w8 r8 Q- G2 U% }7 h
2. 
     Q3 n4 [3 T1 ^- b' I2 [" c3 f
3. rtc = RTC()
   
4. rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
   
5. rtc.datetime() # get date and time

复制代码

  L  D* X2 V- |! P- XPWM（脉宽调制）

请参阅pyb.Pin 和 pyb.Timer.

1. from pyb import Pin, Timer
   
2. 
   1 D- P0 A. v* E. o
3. p = Pin('X1') # X1 has TIM2, CH1
   & Z4 h1 I9 A: b, F. N# E* l
4. tim = Timer(2, freq=1000)
   
5. ch = tim.channel(1, Timer.PWM, pin=p)
   * T4 t2 B6 b2 @; _' s+ h, j4 m
6. ch.pulse_width_percent(50)

复制代码

3 S! p! b1 g! H  `2 ]) N+ e% B% }2 [ADC（模数转换）

请参阅pyb.Pin 和pyb.ADC.

1. from pyb import Pin, ADC
   
2. 
   
3. adc = ADC(Pin('X19'))
   
4. adc.read() # read value, 0-4095

复制代码

DAC（数模转换）

请参阅pyb.Pin 和 pyb.DAC.

1. from pyb import Pin, DAC
   
2. 
   % H8 L! ?; }$ B. L& y! X
3. dac = DAC(Pin('X5'))
   % f, {' {. L* e9 k! `1 t* z
4. dac.write(120) # output between 0 and 255

复制代码

) V% ~+ J3 g6 q3 k/ `8 AUART（串行总线）

请参阅 pyb.UART.

1. from pyb import UART
   " `7 E6 Y4 c/ q5 H- S$ x% X* P; o1 s
2. 
   
3. uart = UART(1, 9600)
   
4. uart.write('hello')
   
5. uart.read(5) # read up to 5 bytes

复制代码

SPI总线

请参阅 pyb.SPI.

1. from pyb import SPI
   
2. 
   
3. spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
   3 n2 n7 n( B: V0 g5 y( @
4. spi.send('hello')
   6 V9 \/ Y( _- t+ D
5. spi.recv(5) # receive 5 bytes on the bus
   % h) w  @6 T2 [6 m! a
6. spi.send_recv('hello') # send and receive 5 bytes

复制代码

0 d( W2 Z5 _7 ]' ]
0 ~8 \* B/ O/ qI2C总线

硬件 I2C 可通过I2C('X') 和用于 pyboard 的 X 和 Y 两半 I2C('Y')。或者，传入外围设备的整数标识符，例如I2C(1)。通过显式指定 scl 和 sda 引脚而不是总线名称，也可以使用软件 I2C 。有关更多详细信息，请参阅 machine.I2C.

1. from machine import I2C
   
2. 
   ; h1 z4 g) K( W# f4 v
3. i2c = I2C('X', freq=400000)                 # create hardware I2c object
   
4. i2c = I2C(scl='X1', sda='X2', freq=100000)  # create software I2C object
   6 w5 Z: b2 ]3 a/ U
5. 
   
6. i2c.scan()                          # returns list of slave addresses
   6 Y  c5 @6 v0 S' u# j8 Q
7. i2c.writeto(0x42, 'hello')          # write 5 bytes to slave with address 0x42
   9 M5 [3 S- ?' I% g9 e
8. i2c.readfrom(0x42, 5)               # read 5 bytes from slave
   
9. 
   " f* ~8 m- _9 u
10. i2c.readfrom_mem(0x42, 0x10, 2)     # read 2 bytes from slave 0x42, slave memory 0x10
    " x9 L1 j' a) r1 I9 @4 S1 p
11. i2c.writeto_mem(0x42, 0x10, 'xy')   # write 2 bytes to slave 0x42, slave memory 0x10

复制代码

, g+ u* M' {. m$ }1 ?" H7 k
% b' h* _0 n) V: h$ |* s

注意：对于传统 I2C 支持，请参阅 pyb.I2C。

: H& K# a0 W# u8 p7 r- e8 KI2S总线

参见 machine.I2S.

1. from machine import I2S, Pin
   1 b# w: u. [0 V; f* Q3 v! c' h) w
2. 
   
3. i2s = I2S(2, sck=Pin('Y6'), ws=Pin('Y5'), sd=Pin('Y8'), mode=I2S.TX, bits=16, format=I2S.STEREO, rate=44100, ibuf=40000) # create I2S object
   
4. i2s.write(buf)             # write buffer of audio samples to I2S device
   2 x/ l- v" u- H: |. x
5. 
   
6. i2s = I2S(1, sck=Pin('X5'), ws=Pin('X6'), sd=Pin('Y4'), mode=I2S.RX, bits=16, format=I2S.MONO, rate=22050, ibuf=40000) # create I2S object
     a6 z1 [! g3 |/ G5 M$ r3 \( j' B# J$ A
7. i2s.readinto(buf)          # fill buffer with audio samples from I2S device

复制代码

I2S 类目前作为技术预览版提供。在预览期间，鼓励用户提供反馈。基于此反馈，I2S 类 API 和实现可能会更改。

PYBv1.0/v1.1 有一个 I2S 总线，id=2。PYBD-SFxW 有两条 I2S 总线，id=1 和 id=2。I2S 与 SPI 共享。

CAN总线（控制器局域网）

参见 pyb.CAN.

1. from pyb import CAN
   / u; c( Z/ Z8 \7 L* m; L; |
2. 
   $ o! q1 {0 g/ _3 D2 i/ q. k
3. can = CAN(1, CAN.LOOPBACK)
   
4. can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
   2 Z% K* J) V7 E- S/ ]7 W
5. can.send('message!', 123)   # send a message with id 123
   
6. can.recv(0)                 # receive message on FIFO 0

复制代码

内部加速度计

参见pyb.Accel.

1. from pyb import Accel
   3 o. ^+ N# t& q& q
2. 
   
3. accel = Accel()
   
4. print(accel.x(), accel.y(), accel.z(), accel.tilt())

复制代码

- X, H# P9 \- h' @* T4 n5 G

ThomasWoody

So happens. We can communicate on this theme.

ThomasWoody

Also that we would do without your very good idea

WilliamJah

I can not recollect.

Wayneessem

dgfergus ??? 2021-8-28 11:00
3 z6 ~8 U/ b: j* d4 WThank you for posting this for all of us

Very interesting information, I am looking forward to the continuation.

Karenpoics

You commit an error. I can defend the position. Write to me in PM, we will discuss.

Alinaldex

excellent idea and is duly

XRumerTest

Hello. And Bye.

XRumerTest

Hello. And Bye.