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: ( B/ B6 Q# a# U. F3 }) m
通用板控制见 pyb. - import pyb4 o4 j9 M3 z/ t$ l
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)- d5 h9 y- ~- r4 n2 z8 ?9 a& q
- pyb.wfi() # pause CPU, waiting for interrupt
: v# m0 z% |8 V$ I. i# D - pyb.freq() # get CPU and bus frequencies
$ z6 A& p8 a* a - pyb.freq(60000000) # set CPU freq to 60MHz
' {% `3 W5 E+ s# @9 Q - pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time
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+ V; M0 B6 [- r' ?3 _6 L- time.sleep(1) # sleep for 1 second/ D- [5 p) {4 ~. C8 N: W
- time.sleep_ms(500) # sleep for 500 milliseconds
0 [- g8 L: o8 a- d j! J9 C - time.sleep_us(10) # sleep for 10 microseconds
& k* ]$ _9 M- o2 F3 a- E# x0 Z - start = time.ticks_ms() # get value of millisecond counter5 u0 C! B( w3 ?" n0 S% f) l
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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内部 LED见 pyb.LED. - from pyb import LED# k5 Q5 ]+ K) _" r. ]
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue+ B, h" D$ d6 e/ L) {/ x9 C
- led.toggle()& q3 M9 B9 k& v3 v' P$ b/ P: q
- led.on()1 J/ O7 V: l" Y; J) m
- led.off()
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* F/ A1 O5 P# `- # LEDs 3 and 4 support PWM intensity (0-255). a6 n" J; J# e! ^8 e2 q
- LED(4).intensity() # get intensity
0 n( n" J4 B( V# j9 m) y2 A - LED(4).intensity(128) # set intensity to half
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内部开关请参阅 pyb.Switch. - from pyb import Switch6 j A; J2 [# b5 A; h& {) |
, u9 P8 `% I2 j/ P& n; e% x- @ H- sw = Switch() A' h. O% s3 S3 L+ e1 D' {$ z2 e+ m
- sw.value() # returns True or False( z$ W' e, r; I# ]
- sw.callback(lambda: pyb.LED(1).toggle())
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# A6 v2 t2 w6 a+ K2 d引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin6 t+ P! d$ r `1 {. {( C; n5 t' `
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- p_out = Pin('X1', Pin.OUT_PP)
$ P" l6 \1 B j' D6 U - p_out.high()
! a0 x: U5 f' b! M - p_out.low()7 a) i# b: q9 Y
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
2 S7 o& n! U/ C( R5 \& r/ e, _+ | P - 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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! l1 U, v# h) S/ h+ z0 u/ q- s1 = Servo(1) # servo on position 1 (X1, VIN, GND); f& l. h& w& ~- J; n& j5 N
- s1.angle(45) # move to 45 degrees! r; c6 \& Y* G! y1 K/ }
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
# ^# p$ X" _0 g) ^( M0 x - s1.speed(50) # for continuous rotation servos
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/ @; |, r) d: V4 \& U3 G外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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" q. b. R3 ~9 \* g- callback = lambda e: print("intr")! ?+ \1 d8 ?* O! ] R" {4 J: l) _
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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计时器请参阅pyb.Timer. - from pyb import Timer* C! Z9 v( C0 \2 r& r, h
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- tim = Timer(1, freq=1000)' v2 G- R. ]; U% m8 d
- tim.counter() # get counter value& \9 i% R# m! ^, ~. H# T
- tim.freq(0.5) # 0.5 Hz
9 h, j/ b \/ P* G5 a - tim.callback(lambda t: pyb.LED(1).toggle())
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# v8 n1 |2 P9 x, O- H4 HRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC7 @0 n" `! H3 {- N
" Z6 R3 O$ A" M$ x6 l) i6 M) v+ o% M- rtc = RTC()
; G4 R ~1 U+ j/ u" t& D - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
( G: u( w4 |4 U! | - rtc.datetime() # get date and time
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PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer
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- p = Pin('X1') # X1 has TIM2, CH1
7 S7 s- k7 A; t5 X$ r% X/ z e - tim = Timer(2, freq=1000)
% Z# g4 f' X9 {3 |; X - ch = tim.channel(1, Timer.PWM, pin=p), h' X/ ?# Q% R8 F. F) D( W6 s
- ch.pulse_width_percent(50)
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, V+ G+ i/ j1 e: TADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC+ a# C- C9 L- z. K* Y2 v
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- adc = ADC(Pin('X19'))2 B5 u3 c/ t$ |7 H; A" N* t
- 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, DAC
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- f' w, V; @! [! B* e2 h- dac = DAC(Pin('X5'))$ `0 {2 q5 m0 w# }0 N! _5 v
- dac.write(120) # output between 0 and 255
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UART(串行总线)请参阅 pyb.UART. - from pyb import UART
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- uart = UART(1, 9600)
1 c) H* K1 Y$ U$ X Y0 y' S: O% r - uart.write('hello')
' k- L- f/ k {5 O - uart.read(5) # read up to 5 bytes
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$ r$ T! ?2 H; M4 {SPI总线请参阅 pyb.SPI. - from pyb import SPI
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- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
, h- n# I% E3 B& g$ V3 g Q - spi.send('hello')& z1 e+ s7 m. @8 O. n, l
- spi.recv(5) # receive 5 bytes on the bus8 J2 {; Y5 T+ W& C6 m
- spi.send_recv('hello') # send and receive 5 bytes
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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. - from machine import I2C% S$ D& p- F2 v$ Z( Z& n; e
$ B1 C# d) B9 @4 j- i2c = I2C('X', freq=400000) # create hardware I2c object
4 N( Q3 _: |7 m# o, Q, W - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object8 i$ T$ I- S- [, A2 p
, }% Z1 H6 \$ g0 b4 k* j9 F7 e( M- i2c.scan() # returns list of slave addresses
/ p. d6 L" R2 Z: q$ f2 q - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
+ j: q; `; P1 w( k* M9 N5 k - i2c.readfrom(0x42, 5) # read 5 bytes from slave2 `' _, B$ ?6 e) @2 O
v9 X4 \# B1 `8 B1 X9 @" R- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10* k6 L2 j5 A$ O0 I1 m1 S
- 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。
+ _" @7 `7 l# e$ z1 M- b7 EI2S总线参见 machine.I2S. - from machine import I2S, Pin1 J1 n+ C) H5 c" b
3 q0 J5 ^+ Y3 w# w$ j9 m! s) R- 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
/ m' S2 C5 M @ - i2s.write(buf) # write buffer of audio samples to I2S device1 ?- @! p1 }& E
# L+ X& t. z; Q: U0 r- 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
) ]" v5 D6 ^8 w/ n9 l4 ?9 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。
& [( a* K$ g, r3 e! iCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN! t6 W2 t' s" b* o. n& h% q
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- can = CAN(1, CAN.LOOPBACK): k! U( ^+ b, ?4 a# m' S8 R9 _
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))* a8 t( B; Q$ I9 h' u8 R; U9 f
- can.send('message!', 123) # send a message with id 123& d! c$ W2 G0 Z, m, O9 b
- can.recv(0) # receive message on FIFO 0
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内部加速度计参见pyb.Accel. - from pyb import Accel
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- accel = Accel()
% q8 p; p( S* U$ M- H+ O/ W - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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