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
   - ]) X1 T' \7 F) H1 d
2. 
   
3. pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
   + H4 ?$ ^$ a1 b9 x0 J( C
4. pyb.wfi() # pause CPU, waiting for interrupt
   
5. pyb.freq() # get CPU and bus frequencies
   5 U5 C# A$ T1 n9 U% G
6. pyb.freq(60000000) # set CPU freq to 60MHz
   
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
   * x5 [' C# h, G/ u
2. 
   ' m- T/ _; H% C
3. time.sleep(1)           # sleep for 1 second
   
4. time.sleep_ms(500)      # sleep for 500 milliseconds
   ! B: F6 B0 A: Q
5. time.sleep_us(10)       # sleep for 10 microseconds
   
6. start = time.ticks_ms() # get value of millisecond counter
   % i0 c0 P1 F3 F9 L$ C4 {
7. delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference

复制代码

* Z/ ~% e3 n0 \; Q$ Z% J$ p) F
. P, j8 v* s5 \内部 LED

见 pyb.LED.

1. from pyb import LED
   5 ~6 o- p5 b; K5 Y6 O+ X
2. 
   
3. led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
   
4. led.toggle()
   - I. f3 C1 K& w; }
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

内部开关

请参阅 pyb.Switch.

1. from pyb import Switch
   
2. 
   4 D, ?1 t* S2 N8 r0 N
3. sw = Switch()
   
4. sw.value() # returns True or False
   
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
   5 s: A+ O3 T4 x1 A: V& A% ~7 G; J
2. 
   ! q5 Z" v8 m% h/ n
3. p_out = Pin('X1', Pin.OUT_PP)
   + z: x) n9 X: e# @: ~  T# R
4. p_out.high()
   : F: E' r1 O/ F* f5 h4 I8 s
5. p_out.low()
   
6. 
   , d8 o+ @9 h. t. F9 G* |5 v6 X# S
7. p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
   
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
   
5. s1.angle(-60, 1500) # move to -60 degrees in 1500ms
   
6. s1.speed(50) # for continuous rotation servos

复制代码

外部中断

请参阅 pyb.ExtInt.

1. from pyb import Pin, ExtInt
   ' g- U/ @' P! J1 r2 L
2. 
   ( ]7 z- D+ \9 y( B
3. callback = lambda e: print("intr")
   2 v6 a) f# |4 o( U
4. ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

复制代码

计时器

请参阅pyb.Timer.

1. from pyb import Timer
   ) Z: w/ C/ x$ H
2. 
   / Z1 R+ i5 n7 P
3. tim = Timer(1, freq=1000)
   
4. tim.counter() # get counter value
   1 ]' i' a/ u$ c3 t) E
5. tim.freq(0.5) # 0.5 Hz
   $ d0 A4 p8 x5 \1 ^, a
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 \# P) M; r3 n! R! ~% Y4 B
2. 
   1 {! W3 p% \% K% A# g' b$ a
3. rtc = RTC()
   $ f4 z* \( C( K0 Y  f/ y
4. rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
   * e9 w1 R! K, @1 j& N' L
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
   / @; n# N$ u6 @! V+ H
2. 
   , T3 v( N+ `5 J' `
3. p = Pin('X1') # X1 has TIM2, CH1
   
4. tim = Timer(2, freq=1000)
   # N3 |, d7 d, j8 o6 ]0 |( A' Q
5. ch = tim.channel(1, Timer.PWM, pin=p)
   
6. ch.pulse_width_percent(50)

复制代码

9 w. u, A" I9 F7 \: d- W; F( YADC（模数转换）

请参阅pyb.Pin 和pyb.ADC.

1. from pyb import Pin, ADC
   
2. 
   $ M3 g: `0 I* Z  F, m" H1 D" N; u! o
3. adc = ADC(Pin('X19'))
   
4. adc.read() # read value, 0-4095

复制代码

, g: R3 t  P9 WDAC（数模转换）

请参阅pyb.Pin 和 pyb.DAC.

1. from pyb import Pin, DAC
   
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
   - {; `/ b6 r: x6 q, D; w! Q0 M
2. 
   " K7 N& n* g" e) e% K" m" ~
3. uart = UART(1, 9600)
   ; y6 s! b4 q, W1 q" s" }! Z
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. 
   + b+ H+ ^% U' e2 e9 _1 |, _( u1 a
3. spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
   
4. spi.send('hello')
   
5. spi.recv(5) # receive 5 bytes on the bus
   
6. spi.send_recv('hello') # send and receive 5 bytes

复制代码

' U5 M0 `; s% L. o9 V2 ~5 T# tI2C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
   " k% a: W7 [9 d( w! ^# \
2. 
   - L! M, S, m! @6 d+ Y) D
3. i2c = I2C('X', freq=400000)                 # create hardware I2c object
   9 ?' o( G6 E& j- [$ ?' H
4. i2c = I2C(scl='X1', sda='X2', freq=100000)  # create software I2C object
   ) B, }, R( ~! _# J' }9 k/ X
5. 
   
6. i2c.scan()                          # returns list of slave addresses
   
7. i2c.writeto(0x42, 'hello')          # write 5 bytes to slave with address 0x42
   9 |! J( O( a8 W0 _1 r5 X/ q
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
    ( B, L0 D6 E3 U& E2 F  W1 r7 }2 B  j
11. i2c.writeto_mem(0x42, 0x10, 'xy')   # write 2 bytes to slave 0x42, slave memory 0x10

复制代码

$ R# t1 c" [; @
. h# K- G' f3 A4 F" O

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. 
   
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
   
5. 
   8 I0 T8 W# ?- n/ @3 k
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

) x. H" a/ q+ B3 {

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
   ( R7 Z# S2 d. a4 |% @' u
2. 
   " s- o$ m: f8 e
3. can = CAN(1, CAN.LOOPBACK)
   ; s& f0 ~$ H: [6 y" k( ~
4. can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
   
5. can.send('message!', 123)   # send a message with id 123
   % y, h* H9 l" p, H
6. can.recv(0)                 # receive message on FIFO 0

复制代码

8 I" @% I! f+ w) ]内部加速度计

参见pyb.Accel.

1. from pyb import Accel
   - T7 J5 z, f4 q% _& ~  k
2. 
   
3. accel = Accel()
   
4. print(accel.x(), accel.y(), accel.z(), accel.tilt())

复制代码

, k. v# ^( D+ p) ?
6 Y/ q1 ^2 h" L& F6 @, \- b' r

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

$ t! W  S5 e( T; l, p6 s( sVery 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.