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
  

- ~5 j9 B0 X- }  W7 y  m& T通用板控制

见 pyb.

1. import pyb
   8 `0 a3 ~  U; ?9 B7 [- [
2. 
   / R7 v( T, W" U" R7 H
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
   
7. pyb.stop() # stop CPU, waiting for external interrupt

复制代码

7 Y- D: _6 ?* ?, p3 y
延迟和计时

使用 time模块：

1. import time
   6 N8 L  {6 z: ^1 \
2. 
   0 n8 l( v5 S1 g! u9 p+ V
3. time.sleep(1)           # sleep for 1 second
   
4. time.sleep_ms(500)      # sleep for 500 milliseconds
   ) ^9 d: ]8 ]" [! j4 H
5. time.sleep_us(10)       # sleep for 10 microseconds
   / Y3 A. Q( R) w5 H7 B
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

, g. L0 K$ p' r5 [3 J5 O5 w! v
; p7 y# }$ t9 J" {内部 LED

见 pyb.LED.

1. from pyb import LED
   : s  n0 b, e- I3 ?% @/ h  u) N3 E
2. 
   5 C/ C( }' t: f
3. led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
   ' N& M6 c7 W6 s( @* X* M
4. led.toggle()
   
5. led.on()
   
6. led.off()
   
7. 
   
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

0 m; f9 [: A9 m$ t. ^
! {4 D9 m0 L; d, k' t内部开关

请参阅 pyb.Switch.

1. from pyb import Switch
   1 {# P7 g' Q& E$ A
2. 
   
3. sw = Switch()
   
4. sw.value() # returns True or False
   # Y' A* d, q6 J, l
5. sw.callback(lambda: pyb.LED(1).toggle())

复制代码

引脚和 GPIO

请参阅 pyb.Pin.

1. from pyb import Pin
   
2. 
   ' k% D2 P. p- {$ v: u2 u1 b
3. p_out = Pin('X1', Pin.OUT_PP)
   $ d& S( g/ k. e- T+ I( O- ^" m
4. p_out.high()
   : ]) X: `2 f  Y) F4 z! t% D
5. p_out.low()
   
6. 
   
7. p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
   
8. p_in.value() # get value, 0 or 1

复制代码

; l' o) C2 c8 N1 L+ U# l+ [伺服控制

请参阅pyb.Servo.

1. from pyb import Servo
   3 T+ @( F( y" a2 g
2. 
   
3. s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
   
4. s1.angle(45) # move to 45 degrees
   ) J( x9 h; v5 G! u9 c( y8 q
5. s1.angle(-60, 1500) # move to -60 degrees in 1500ms
   
6. s1.speed(50) # for continuous rotation servos

复制代码

1 @+ X& V9 k' W! |9 s6 W3 \+ E
1 n; O# N9 }3 x6 E2 x外部中断

请参阅 pyb.ExtInt.

1. from pyb import Pin, ExtInt
   6 e& s& W( v8 L4 r2 Z4 T  b: x
2. 
   . q3 s* ~, D2 U8 C3 `+ r
3. callback = lambda e: print("intr")
   
4. ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

复制代码

, A8 g0 V$ g3 q; d3 M! [计时器

请参阅pyb.Timer.

1. from pyb import Timer
   
2. 
   
3. tim = Timer(1, freq=1000)
   
4. tim.counter() # get counter value
   , p: b2 N: m, q' |
5. tim.freq(0.5) # 0.5 Hz
   
6. tim.callback(lambda t: pyb.LED(1).toggle())

复制代码

RTC（实时时钟）

请参阅 pyb.RTC

1. from pyb import RTC
     _4 h; L. f* R, s$ [1 V2 I+ Q; @
2. 
   8 @& c) L; ?0 c
3. rtc = RTC()
   ' F! o4 F. s8 }
4. rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
   4 L) e4 F9 `9 F8 u! n$ t5 b3 h3 [
5. rtc.datetime() # get date and time

复制代码

PWM（脉宽调制）

请参阅pyb.Pin 和 pyb.Timer.

1. from pyb import Pin, Timer
   
2. 
   3 C! T0 M  ^9 ^& ?! M
3. p = Pin('X1') # X1 has TIM2, CH1
   
4. tim = Timer(2, freq=1000)
   7 Z1 T- r9 K# T( m
5. ch = tim.channel(1, Timer.PWM, pin=p)
   
6. ch.pulse_width_percent(50)

复制代码

ADC（模数转换）

请参阅pyb.Pin 和pyb.ADC.

1. from pyb import Pin, ADC
   , O, u- x* b* q1 s  m$ r+ G3 y
2. 
   * ?/ l. w$ @) z7 O# w0 H
3. adc = ADC(Pin('X19'))
   
4. adc.read() # read value, 0-4095

复制代码

6 K7 i& W, O/ j* f) J* c# Z4 n/ lDAC（数模转换）

请参阅pyb.Pin 和 pyb.DAC.

1. from pyb import Pin, DAC
   ) q* @3 g7 K: l, U
2. 
   # I! j7 `5 B: @5 j
3. dac = DAC(Pin('X5'))
   
4. dac.write(120) # output between 0 and 255

复制代码

, E1 r' P8 T: D, W8 R6 T) }UART（串行总线）

请参阅 pyb.UART.

1. from pyb import UART
   $ u/ T3 Y& A3 C* A8 a
2. 
   5 X% o: s2 N. X1 T" C# [+ O
3. uart = UART(1, 9600)
   
4. uart.write('hello')
   
5. uart.read(5) # read up to 5 bytes

复制代码

2 k! Q. _2 a4 W' [
SPI总线

请参阅 pyb.SPI.

1. from pyb import SPI
   6 h! k2 a" A4 X" ^+ _
2. 
   
3. spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
   $ c& U0 T, O: J, F
4. spi.send('hello')
   1 W) Q; M" ]) k: _& Q2 z' m; e
5. spi.recv(5) # receive 5 bytes on the bus
   5 E7 j8 K8 g2 @$ ^
6. spi.send_recv('hello') # send and receive 5 bytes

复制代码

. b( p( t3 r/ }( @1 ]" sI2C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. 
     e  @7 \5 X) E4 q6 h- l
3. i2c = I2C('X', freq=400000)                 # create hardware I2c object
     ?- w; `8 E/ G2 {7 X6 l
4. i2c = I2C(scl='X1', sda='X2', freq=100000)  # create software I2C object
   
5. 
   
6. i2c.scan()                          # returns list of slave addresses
   $ q7 r0 }5 V8 V; N* ]
7. i2c.writeto(0x42, 'hello')          # write 5 bytes to slave with address 0x42
   . H8 Q9 Q+ U) K5 v, F
8. i2c.readfrom(0x42, 5)               # read 5 bytes from slave
   + U, r! F" j# ]6 L  x
9. 
   + x/ y* E0 w$ n; y
10. i2c.readfrom_mem(0x42, 0x10, 2)     # read 2 bytes from slave 0x42, slave memory 0x10
    & q  S6 Q5 B, @  T
11. i2c.writeto_mem(0x42, 0x10, 'xy')   # write 2 bytes to slave 0x42, slave memory 0x10

复制代码

5 B. [; ]( [: L, h/ B/ ^7 W. B
0 ~0 ^2 G) L$ G4 j2 @3 U1 r1 K

注意：对于传统 I2C 支持，请参阅 pyb.I2C。

" f0 ~3 T4 W! f4 V/ j5 N0 bI2S总线

参见 machine.I2S.

1. from machine import I2S, Pin
   4 x( [3 Y& f4 @
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
   3 G0 x2 Q6 t# k! m' w
4. i2s.write(buf)             # write buffer of audio samples to I2S device
   
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
   4 f6 `8 i% ?, R. @
7. i2s.readinto(buf)          # fill buffer with audio samples from I2S device

复制代码

+ w5 G' L: [' W1 R0 o

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。

* F. `- G' F6 Q/ p# D3 OCAN总线（控制器局域网）

参见 pyb.CAN.

1. from pyb import CAN
   
2. 
   6 u4 c+ Z/ `( p0 g- Z, S# t
3. can = CAN(1, CAN.LOOPBACK)
   
4. can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
   ' A. [2 ^0 m7 [2 C6 W5 V
5. can.send('message!', 123)   # send a message with id 123
   4 |2 e; i* i5 B3 _
6. can.recv(0)                 # receive message on FIFO 0

复制代码

; g* r7 e, X$ k" H2 J( X8 H
内部加速度计

参见pyb.Accel.

1. from pyb import Accel
   
2. 
   
3. accel = Accel()
   
4. print(accel.x(), accel.y(), accel.z(), accel.tilt())

复制代码

2 c6 W# t- q" H$ D' e4 ?) A9 Y# t

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
9 z) u5 \5 U- Z1 JThank you for posting this for all of us

" D7 r3 t# c; Z' \, b3 r5 wVery 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.