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: # H5 R, O$ r" O* M
通用板控制见 pyb. - import pyb( d8 s8 ~1 \$ x" Q$ y9 r6 H) f
. t, m: p! u- c" d/ b3 `! v, S- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)( H7 A" T# }+ C+ V3 I( A
- pyb.wfi() # pause CPU, waiting for interrupt
+ r. w; S" ^0 ^7 H: V0 |. s5 J - pyb.freq() # get CPU and bus frequencies3 j L. C4 [; s7 H. M h) D
- pyb.freq(60000000) # set CPU freq to 60MHz& A6 g0 [$ Z9 q: k
- pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time" e1 @: p @1 N5 \
5 O% @* L6 e9 s. t# g A- time.sleep(1) # sleep for 1 second
9 Q5 a, ]1 i4 o# |! z* t" D - time.sleep_ms(500) # sleep for 500 milliseconds
$ t8 [# b& ^$ P+ `& i6 | - time.sleep_us(10) # sleep for 10 microseconds2 s! S; s: X" m$ ~8 i% c
- start = time.ticks_ms() # get value of millisecond counter, o( w1 S( ]* m
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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/ a4 |' A# h8 g3 R* D4 d) c% e内部 LED见 pyb.LED. - from pyb import LED
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% `6 k' a% Y3 i) E* ]8 G- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue9 k8 B, ~1 Z) T6 e7 d
- led.toggle()
5 g2 x- H7 n5 o% S; J4 N! _ - led.on()
6 l# E+ r2 ?3 l* [ - led.off()
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- # LEDs 3 and 4 support PWM intensity (0-255)
$ j& f T4 }( W4 O3 D - LED(4).intensity() # get intensity/ Z- @) @6 l9 u/ d
- LED(4).intensity(128) # set intensity to half
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内部开关请参阅 pyb.Switch. - from pyb import Switch" R4 G8 L4 Z/ _4 @/ f7 u* V. ^
) v) f# y) B/ r& [- sw = Switch()1 J6 E* Q# Z) n; y+ s5 x
- sw.value() # returns True or False& B7 }3 X3 o- O
- sw.callback(lambda: pyb.LED(1).toggle())
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引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin B: {- \( ?. k m
+ H; C3 ?6 \2 @- p_out = Pin('X1', Pin.OUT_PP)
* U2 _+ T- F5 c" R9 f# J8 h - p_out.high()
5 ~1 Z+ u( w: y$ ^/ M - p_out.low()
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: c; `: b3 v( C4 ?* m" {- b: U- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)# [0 P' j2 v5 s: v9 T c
- p_in.value() # get value, 0 or 1
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伺服控制请参阅pyb.Servo. - from pyb import Servo
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3 d. B5 m3 M( }0 ^4 c- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)8 a* I2 \/ }4 T' C0 n
- s1.angle(45) # move to 45 degrees% _, h! i( _) @. q0 R
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
. I7 e2 P# q4 V3 x) E4 T8 _) ]# m - s1.speed(50) # for continuous rotation servos
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5 ~8 J/ ?9 y6 a外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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- callback = lambda e: print("intr")
9 _" O# M4 t( I2 _) f) C - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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, ` z/ L2 O4 V计时器请参阅pyb.Timer. - from pyb import Timer
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- tim = Timer(1, freq=1000). C1 M- Z9 U$ Q' A# y, R( q
- tim.counter() # get counter value, O7 v0 D0 {6 {% I1 I* G
- tim.freq(0.5) # 0.5 Hz; t& z9 a, u* }% y. B' F+ f. _
- tim.callback(lambda t: pyb.LED(1).toggle())
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3 ~$ O' O% J" @7 WRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC8 V$ ]& k6 N# f4 f
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- rtc = RTC()4 _7 J8 f( h! O* ~
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time. M- ?9 v5 L9 X$ t
- rtc.datetime() # get date and time
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( U0 E2 Q: k/ [% i3 M6 c2 hPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer
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$ T6 V4 R! } z% z. M2 w- p = Pin('X1') # X1 has TIM2, CH1
' ^) Q2 b% c% U - tim = Timer(2, freq=1000)1 V( ]% L7 n5 s4 }4 V: _; X+ [
- ch = tim.channel(1, Timer.PWM, pin=p)5 i$ w0 W' U$ L0 H+ [* b
- ch.pulse_width_percent(50)
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7 e2 ~$ G# i. f" ~& b0 `' CADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC5 [( P& d2 k6 m# t- [/ S! p
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- adc = ADC(Pin('X19'))1 h: D# Q! n1 [1 x
- adc.read() # read value, 0-4095
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DAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC5 x6 w# b% t, s6 a, N8 m U
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- dac = DAC(Pin('X5')). }+ E3 x" v/ b7 G& o5 w
- dac.write(120) # output between 0 and 255
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% L" Q4 _6 t. I7 K5 t' D/ b; WUART(串行总线)请参阅 pyb.UART. - from pyb import UART
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0 `0 L) O) g0 Q+ A$ B; E# p- uart = UART(1, 9600)
* z( W: b8 T8 ]3 j - uart.write('hello')
" I8 ?; S' d7 @3 N - uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI( u- T" Q8 Q0 F0 E
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- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)% y y8 w# _# Z3 ~
- spi.send('hello')4 I1 z9 X/ Q' e
- spi.recv(5) # receive 5 bytes on the bus
( |. |) S- \( D; ^ - spi.send_recv('hello') # send and receive 5 bytes
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; J" c- k/ _; F8 X- zI2C总线硬件 I2C 可通过I2C('X') 和用于 pyboard 的 X 和 Y 两半 I2C('Y')。或者,传入外围设备的整数标识符,例如I2C(1)。通过显式指定 scl 和 sda 引脚而不是总线名称,也可以使用软件 I2C 。有关更多详细信息,请参阅 machine.I2C. - from machine import I2C
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- i2c = I2C('X', freq=400000) # create hardware I2c object0 n1 P% v; k* b7 {3 l
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object0 Y# |( t* f" W! ~, \) J
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- i2c.scan() # returns list of slave addresses
' l% C% k. a) E - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42/ h0 b. B, {' w$ T% t9 t& {
- i2c.readfrom(0x42, 5) # read 5 bytes from slave0 ]+ Y! z2 [8 Y4 h
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10/ H8 C/ I! H: j5 ] w
- i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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注意:对于传统 I2C 支持,请参阅 pyb.I2C。
8 d: s' ~! D; iI2S总线参见 machine.I2S. - from machine import I2S, Pin9 P9 }: e# w0 X- C) z: U# [
: A: _' B& J7 \2 P( D- 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. r3 \" ^. {$ b) ?& w1 b E
- i2s.write(buf) # write buffer of audio samples to I2S device3 H) i% o2 a" o8 X3 X
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- 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
* d5 D! l8 z/ t( n% |9 T* a - i2s.readinto(buf) # fill buffer with audio samples from I2S device
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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。 r! ^; v" f" t. d' @9 M8 q) K; Y
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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- can = CAN(1, CAN.LOOPBACK)
+ D a8 _1 C& G2 ]0 r+ c7 w6 i - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))+ D2 q" Y6 K& M$ e# X2 a9 w6 M6 G
- can.send('message!', 123) # send a message with id 123
. Q1 Y0 L, x, Z- ?) w' u8 ~ - can.recv(0) # receive message on FIFO 0
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5 R" }9 S2 z% q内部加速度计参见pyb.Accel. - from pyb import Accel: o& Q) Q; p$ _" B: |5 N% [5 O: U
5 X( |9 V4 g: I3 r: j- accel = Accel()- _$ L1 P3 ]2 y C1 e0 z+ O
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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