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. 
   4 w: s# k8 O2 E4 `" D' L
3. pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
   
4. pyb.wfi() # pause CPU, waiting for interrupt
   : g0 h1 p6 D5 P
5. pyb.freq() # get CPU and bus frequencies
   # x' k! d5 T( C3 r. K1 v
6. pyb.freq(60000000) # set CPU freq to 60MHz
   3 ?) Q" E4 g+ Z- h1 {+ [# n
7. pyb.stop() # stop CPU, waiting for external interrupt

复制代码

9 [" i' W" w5 T4 ?" p
延迟和计时

使用 time模块：

1. import time
   
2. 
   
3. time.sleep(1)           # sleep for 1 second
   - C" O8 @) r) S1 ^
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

2 G2 U+ M0 A) R5 t
内部 LED

见 pyb.LED.

1. from pyb import LED
   " m- f( l/ @' Z; D
2. 
   7 N! a) s. t  ]6 F" a
3. led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
   * v) L- P3 U! b4 z' ^$ c" Q. a
4. led.toggle()
   ! M6 p9 N) I  V1 I
5. led.on()
   
6. led.off()
   
7. 
   6 P  e2 G3 }6 v& V
8. # LEDs 3 and 4 support PWM intensity (0-255)
   
9. LED(4).intensity()    # get intensity
   ) H7 g' y8 z- o! K
10. LED(4).intensity(128) # set intensity to half

复制代码

, I% X2 Q1 U7 \8 `! |( F$ |5 C
8 E! _& [+ L' R内部开关

请参阅 pyb.Switch.

1. from pyb import Switch
   : N: D" `5 R) `+ l/ Y; p: {
2. 
   
3. sw = Switch()
   3 ?2 [5 v, g4 t$ u3 W% U# e' t
4. sw.value() # returns True or False
   % P7 _5 d! ^: D
5. sw.callback(lambda: pyb.LED(1).toggle())

复制代码

0 F: K9 j/ k5 F4 N8 F7 [
# c; g4 _% ?1 V' v' v6 J引脚和 GPIO

请参阅 pyb.Pin.

1. from pyb import Pin
   
2. 
   
3. p_out = Pin('X1', Pin.OUT_PP)
   
4. p_out.high()
   
5. p_out.low()
   ; ?  x) J4 L! Q7 C. [
6. 
   ) s: R' m/ A/ H" x
7. p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
   " K. a% l& L. r3 @) R# n$ I
8. p_in.value() # get value, 0 or 1

复制代码

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)
   
4. s1.angle(45) # move to 45 degrees
   1 [' R3 z; U) ~2 |: G, ^
5. s1.angle(-60, 1500) # move to -60 degrees in 1500ms
   
6. s1.speed(50) # for continuous rotation servos

复制代码

% A/ _6 ^0 l0 l& y( g. l% k外部中断

请参阅 pyb.ExtInt.

1. from pyb import Pin, ExtInt
   
2. 
   1 a, `9 j1 \$ z7 r
3. callback = lambda e: print("intr")
   2 V. W* ^/ ]4 x7 [) k4 x, d: z
4. ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

复制代码

! m  w2 O0 H' J& m计时器

请参阅pyb.Timer.

1. from pyb import Timer
   
2. 
   
3. tim = Timer(1, freq=1000)
   8 \# X& f. B- D1 {% [5 R
4. tim.counter() # get counter value
   5 X( u) P, {) e) `6 `# d2 |
5. tim.freq(0.5) # 0.5 Hz
   
6. tim.callback(lambda t: pyb.LED(1).toggle())

复制代码

% u" N/ v" U! v5 r5 }RTC（实时时钟）

请参阅 pyb.RTC

1. from pyb import RTC
   : [% T5 B) o4 N" s. }, N+ r
2. 
   
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

PWM（脉宽调制）

请参阅pyb.Pin 和 pyb.Timer.

1. from pyb import Pin, Timer
   : e" d% `& M- |5 c
2. 
   $ e4 L) n9 d- b1 O4 I+ J
3. p = Pin('X1') # X1 has TIM2, CH1
   % G1 @' ]  x2 q+ y
4. tim = Timer(2, freq=1000)
   
5. ch = tim.channel(1, Timer.PWM, pin=p)
   5 f, x7 j; j7 `% M" w
6. ch.pulse_width_percent(50)

复制代码

% j1 b: g3 n$ g, H& O- K- A" yADC（模数转换）

请参阅pyb.Pin 和pyb.ADC.

1. from pyb import Pin, ADC
   
2. 
   * e4 s1 H5 {, ~7 X. ], O
3. adc = ADC(Pin('X19'))
   ; B, ^9 _9 t7 d
4. adc.read() # read value, 0-4095

复制代码

9 H; F9 z) I2 L) O( f
' _1 Q/ e4 _+ kDAC（数模转换）

请参阅pyb.Pin 和 pyb.DAC.

1. from pyb import Pin, DAC
   / {" }% Y! K/ ^9 P6 l2 _( A1 C
2. 
   
3. dac = DAC(Pin('X5'))
   
4. dac.write(120) # output between 0 and 255

复制代码

UART（串行总线）

请参阅 pyb.UART.

1. from pyb import UART
   
2. 
   6 a$ n0 G. b7 H9 X; R
3. uart = UART(1, 9600)
   
4. uart.write('hello')
   
5. uart.read(5) # read up to 5 bytes

复制代码

3 s- G( B" N3 S! I+ n7 v
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)
   , X% j# Z8 L) i& B5 l2 I, Z
4. spi.send('hello')
   $ Q4 q" D& d/ e7 ^3 V
5. spi.recv(5) # receive 5 bytes on the bus
   
6. spi.send_recv('hello') # send and receive 5 bytes

复制代码

& h9 q) g9 u4 t  _% v8 a6 R
I2C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
   $ P  C" g# t7 g( X' F* D
2. 
   
3. i2c = I2C('X', freq=400000)                 # create hardware I2c object
   ! i- u2 {* I2 ]9 k3 Q
4. i2c = I2C(scl='X1', sda='X2', freq=100000)  # create software I2C object
   * S' e: \8 Y+ n( H5 o% y  u) ?2 g) l
5. 
   1 `9 N, X' _# A% b
6. i2c.scan()                          # returns list of slave addresses
   
7. i2c.writeto(0x42, 'hello')          # write 5 bytes to slave with address 0x42
   ) V! B! |. @, @. g' K
8. i2c.readfrom(0x42, 5)               # read 5 bytes from slave
   / [+ J3 F8 w( k4 s; j4 u. R
9. 
   
10. i2c.readfrom_mem(0x42, 0x10, 2)     # read 2 bytes from slave 0x42, slave memory 0x10
    ' l, z) w; Q2 J. H$ U8 ]
11. i2c.writeto_mem(0x42, 0x10, 'xy')   # write 2 bytes to slave 0x42, slave memory 0x10

复制代码

  t. e* s4 E0 R: M1 t0 R

注意：对于传统 I2C 支持，请参阅 pyb.I2C。

I2S总线

参见 machine.I2S.

1. from machine import I2S, Pin
   
2. 
   - y" q2 D0 W/ z9 b0 g; \- X3 r2 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
   
4. i2s.write(buf)             # write buffer of audio samples to I2S device
   $ g& x2 ]' G3 U" w# T* f
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
   * e: T5 b( X- ~( B" ~3 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。

( k" z5 ]. X( A; b. N5 G) DCAN总线（控制器局域网）

参见 pyb.CAN.

1. from pyb import CAN
   
2. 
     X) O8 t: H5 v# _5 E; W$ D" }' O/ ~7 l
3. can = CAN(1, CAN.LOOPBACK)
   
4. can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
   8 }% H9 l9 l8 Y/ \% k
5. can.send('message!', 123)   # send a message with id 123
   2 {( S: Z. G" g0 u* Z
6. can.recv(0)                 # receive message on FIFO 0

复制代码

$ \1 r/ U3 W6 r  R/ e  e% p; Z3 x
内部加速度计

参见pyb.Accel.

1. from pyb import Accel
   / L" m+ M3 \& N3 A; U2 L& S# L1 K
2. 
   
3. accel = Accel()
   
4. print(accel.x(), accel.y(), accel.z(), accel.tilt())

复制代码

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
8 `/ Q1 O: W4 rThank you for posting this for all of us

4 g$ O( |4 s" z& q( F: @5 Z& dVery 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.