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
  

2 c8 e! d- v$ a8 I2 F5 l2 u通用板控制

见 pyb.

1. import pyb
   " D  o: W: c6 D: L
2. 
   
3. pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
   0 V7 c) K$ w+ Y) b, i: u
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
   $ g3 m/ [: k! A6 p( h6 v
7. pyb.stop() # stop CPU, waiting for external interrupt

复制代码

, J& H: _9 C2 ?& Z7 `' ~7 C延迟和计时

使用 time模块：

1. import time
   ( L( z* g- U1 Z% d- w6 Y" B+ @
2. 
   
3. time.sleep(1)           # sleep for 1 second
   $ D' a$ P  N  n4 x" M9 r
4. time.sleep_ms(500)      # sleep for 500 milliseconds
   # D  u) W+ j/ F0 z  u# r7 m$ Y2 {2 k
5. time.sleep_us(10)       # sleep for 10 microseconds
   
6. start = time.ticks_ms() # get value of millisecond counter
   6 p; K  u/ l) F) G% R" i
7. delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference

复制代码

4 d4 D3 `* J# Q1 K内部 LED

见 pyb.LED.

1. from pyb import LED
   - I3 R: w$ o% @* h9 o- c
2. 
   
3. led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
   
4. led.toggle()
   8 G! c! c: A! ?2 J2 c3 f0 B
5. led.on()
   
6. led.off()
   
7. 
   0 K' u& ?& H* z+ I  v' A. B2 a
8. # LEDs 3 and 4 support PWM intensity (0-255)
   & s" N" s) n) N
9. LED(4).intensity()    # get intensity
   9 T( z: J. x, ]# k
10. LED(4).intensity(128) # set intensity to half

复制代码

, X; g' r+ y4 b, i内部开关

请参阅 pyb.Switch.

1. from pyb import Switch
   
2. 
   9 r8 @; j0 h$ T7 V7 }# j+ t
3. sw = Switch()
   3 I, s5 C+ B% E+ K, n- `4 M4 T
4. sw.value() # returns True or False
   6 q* @- i0 p: H' X& i
5. sw.callback(lambda: pyb.LED(1).toggle())

复制代码

$ y8 r3 e: p/ U. r7 l8 K2 f引脚和 GPIO

请参阅 pyb.Pin.

1. from pyb import Pin
   
2. 
   ) E5 W% E* n0 h1 v
3. p_out = Pin('X1', Pin.OUT_PP)
   " d( a% s9 c: B- y
4. p_out.high()
   5 W; \) i3 G, ~+ O- W- ~- Z) j
5. p_out.low()
   - X+ o; o+ H3 V
6. 
   * T' }" V4 M2 z
7. p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
   
8. p_in.value() # get value, 0 or 1

复制代码

0 E. w# }4 I7 a  s5 ]+ o7 s. o, x
伺服控制

请参阅pyb.Servo.

1. from pyb import Servo
   
2. 
   + F3 S2 T% c) Z5 u1 P0 Y
3. s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
   
4. s1.angle(45) # move to 45 degrees
   
5. s1.angle(-60, 1500) # move to -60 degrees in 1500ms
   + C+ Q% v' I, ]6 E/ d: o8 |
6. s1.speed(50) # for continuous rotation servos

复制代码

; d  U5 F% b  w8 a( m; G
外部中断

请参阅 pyb.ExtInt.

1. from pyb import Pin, ExtInt
   : a/ g5 }& x  }! e: e( k( a0 L
2. 
   
3. callback = lambda e: print("intr")
   1 O' Z% D1 S! h
4. ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

复制代码

$ E! u; A3 F% D5 E  L
' _3 c! p0 C- ^* w, p% m6 r计时器

请参阅pyb.Timer.

1. from pyb import Timer
   
2. 
   4 Z8 T; E3 X  C3 Y! |" m
3. tim = Timer(1, freq=1000)
   & V5 J3 U: w8 W
4. tim.counter() # get counter value
   / I$ L* e: ?; U; G- Q! y8 D
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
   
2. 
   
3. rtc = RTC()
   8 H4 h* N+ A6 d
4. rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
   # ?/ v$ `! k" G8 {
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
   4 C" g: ]$ ]! M8 l: S* e
2. 
   
3. p = Pin('X1') # X1 has TIM2, CH1
   / n% t4 }2 u& o& J* d4 S
4. tim = Timer(2, freq=1000)
   
5. ch = tim.channel(1, Timer.PWM, pin=p)
   5 x. ^+ B( D7 B& \+ Y7 a
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
   . U: F1 l  o! N/ ~; T
2. 
   
3. adc = ADC(Pin('X19'))
   
4. adc.read() # read value, 0-4095

复制代码

# ^1 M3 P% n3 d* k1 O
' h+ c! {" ^2 h: w7 ADAC（数模转换）

请参阅pyb.Pin 和 pyb.DAC.

1. from pyb import Pin, DAC
   & k  g+ M1 z4 M/ T7 }; V
2. 
   3 u- ?: [& B6 S% Y- `
3. dac = DAC(Pin('X5'))
   8 P$ d/ J  y- a
4. dac.write(120) # output between 0 and 255

复制代码

2 p1 s+ t# ?/ ~UART（串行总线）

请参阅 pyb.UART.

1. from pyb import UART
   
2. 
   ) d0 p2 f2 l7 q1 l$ K6 ^
3. uart = UART(1, 9600)
   + y7 Y" m. ?/ T" P1 q
4. uart.write('hello')
   
5. uart.read(5) # read up to 5 bytes

复制代码

( \/ P5 n( b. J8 x9 b+ i7 S3 ASPI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)
   
4. spi.send('hello')
   , ~% i; d4 [# O$ q/ U
5. spi.recv(5) # receive 5 bytes on the bus
   2 o: y( @, q8 ]3 m
6. spi.send_recv('hello') # send and receive 5 bytes

复制代码

# X7 d- C3 l5 v) B4 HI2C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. 
   
3. i2c = I2C('X', freq=400000)                 # create hardware I2c object
   # O" ^; o) t4 ?# O7 J
4. i2c = I2C(scl='X1', sda='X2', freq=100000)  # create software I2C object
   
5. 
   
6. i2c.scan()                          # returns list of slave addresses
   
7. i2c.writeto(0x42, 'hello')          # write 5 bytes to slave with address 0x42
   5 X3 N+ z- M* ^2 w
8. i2c.readfrom(0x42, 5)               # read 5 bytes from slave
   
9. 
   
10. i2c.readfrom_mem(0x42, 0x10, 2)     # read 2 bytes from slave 0x42, slave memory 0x10
    / o7 B. c( j+ H, B! F5 G. Z
11. i2c.writeto_mem(0x42, 0x10, 'xy')   # write 2 bytes to slave 0x42, slave memory 0x10

复制代码

注意：对于传统 I2C 支持，请参阅 pyb.I2C。

( J* K6 R: r+ [, d; X" _- JI2S总线

参见 machine.I2S.

1. from machine import I2S, Pin
   # K$ h" X2 x) h. Y$ U4 ?
2. 
   : D. n' u7 u  E
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
   8 k. g  r. T" t/ S8 K- X" y% h% U0 ^
4. i2s.write(buf)             # write buffer of audio samples to I2S device
   9 k% i$ a$ Q4 \& N" W. ~- z* I( I
5. 
   , m* T- Y" [  c5 p$ d) O0 C! Z* i+ `
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
   
7. i2s.readinto(buf)          # fill buffer with audio samples from I2S device

复制代码

2 A% q8 t' Z- @9 ]/ ?0 f

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
   0 X9 {4 v# M& E, H- ^; [5 s# @
2. 
   ! b9 I( G! K* C  ~/ D
3. can = CAN(1, CAN.LOOPBACK)
   
4. can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
   / G; H% f4 `: S2 ~5 Q& y6 [1 b. h" n
5. can.send('message!', 123)   # send a message with id 123
   1 _; r/ L0 K7 z8 s. V. H
6. can.recv(0)                 # receive message on FIFO 0

复制代码

- a# S2 z: J: I9 j( ]( t) }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

% l, F& P8 ?2 F$ ?# 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
Thank you for posting this for all of us

/ n- D; k- v# z2 OVery 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.