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:
% E; M; D, [& j0 [; |9 r: y通用板控制见 pyb. - import pyb3 U2 ?; K+ C# |" |7 H+ x- c
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
7 h! }; d7 ?) U6 a% _6 U! |4 E( j - pyb.wfi() # pause CPU, waiting for interrupt5 ]* _$ v9 v& F, B4 s; [
- pyb.freq() # get CPU and bus frequencies
8 e8 j5 m) E5 m p% c3 c - pyb.freq(60000000) # set CPU freq to 60MHz9 N3 f. i( x6 M3 z# }
- pyb.stop() # stop CPU, waiting for external interrupt
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% k* t6 l& W$ m5 h4 \9 W; v& L- J延迟和计时使用 time模块: - import time6 F2 ]: x4 v* |
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- time.sleep(1) # sleep for 1 second
7 A( S, m+ P u( F7 T9 D) M - time.sleep_ms(500) # sleep for 500 milliseconds& F8 O2 B1 y1 ~2 D1 I) B5 H' y' T; m
- time.sleep_us(10) # sleep for 10 microseconds; ?! H) J, r( g: F* E* N1 t
- start = time.ticks_ms() # get value of millisecond counter
& \4 p9 B$ w: @' Z5 {/ ^" x7 U B - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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7 @( @9 O9 P( t; Q/ X3 c' j7 e内部 LED见 pyb.LED. - from pyb import LED3 z6 m& i" x8 h* d5 {
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue! G) Y: ?, `" t- ^0 \
- led.toggle()4 t. M/ K% D7 N w
- led.on()
7 S% N) Z% a" z; e - led.off()% {. M+ Q+ I2 f
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- # LEDs 3 and 4 support PWM intensity (0-255)
" b N# p! g* G - LED(4).intensity() # get intensity* ]# Y( _5 W$ [, ? l5 X+ s% {! d! z3 C
- LED(4).intensity(128) # set intensity to half
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' j; X! i0 f$ f5 e) Q内部开关请参阅 pyb.Switch. - from pyb import Switch
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- sw = Switch()
) h" M/ i( y* c/ P - sw.value() # returns True or False! _; a0 m1 l, K
- sw.callback(lambda: pyb.LED(1).toggle())
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引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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# E! M+ p* d6 P+ d( R) n3 r' d# y+ c- p_out = Pin('X1', Pin.OUT_PP)
2 `, n6 K( n8 g, P( y9 s$ K - p_out.high()# ^$ [: a; e3 u7 {' ^7 c2 T
- p_out.low()
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP). w* _9 v/ A2 H7 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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4 n* u, F$ H& f; r. `5 Y- s1 = Servo(1) # servo on position 1 (X1, VIN, GND) ` t' d/ j, M- X
- s1.angle(45) # move to 45 degrees
6 _% |6 Z' {; o - s1.angle(-60, 1500) # move to -60 degrees in 1500ms! Q L" O* m+ e, i6 w' ~
- s1.speed(50) # for continuous rotation servos
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+ v7 D# H7 s/ ?6 W k: U; _外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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" v* K- @$ [: J9 [) E& d- callback = lambda e: print("intr")* U9 |# C/ t9 q n! D3 t
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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5 f* [+ g- B6 l6 Y! F% L2 Q计时器请参阅pyb.Timer. - from pyb import Timer
' [9 R; L9 h$ m( F' B7 p }6 I* r3 E - # @; O# c' r/ o6 u% S2 \) d
- tim = Timer(1, freq=1000)
( i" B9 E% x) k: o- W - tim.counter() # get counter value$ B r* [" X6 \; n
- tim.freq(0.5) # 0.5 Hz6 j! N' U! e+ { N7 U: P
- tim.callback(lambda t: pyb.LED(1).toggle())
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RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
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- rtc = RTC()
/ H: _8 n* ?* w" y8 S5 ?7 _ O I" Z - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time- b9 W5 C, R2 X6 j. d6 q
- 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: b+ ?, |! G8 n5 {, A7 C
" h, h, Y3 M3 F0 }3 t" E- p = Pin('X1') # X1 has TIM2, CH17 t- t P/ y" C; Q: q
- tim = Timer(2, freq=1000)
! p `0 w Y# I8 ` - ch = tim.channel(1, Timer.PWM, pin=p)
1 J7 f6 P }+ d- O5 z5 l - ch.pulse_width_percent(50)
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ADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC Z6 z6 P, h" X: s6 h# K
( f- }: q K# k J- adc = ADC(Pin('X19'))& I( {+ P9 r6 h2 q D, d" V) h8 U
- 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 g" s9 P# i& u3 z6 ]
( n( d S, e) w- dac = DAC(Pin('X5'))
' A r( ^, O x1 |" @ - dac.write(120) # output between 0 and 255
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6 h+ w# y7 G2 a# z! t+ A6 Z: D' F4 HUART(串行总线)请参阅 pyb.UART. - from pyb import UART
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- uart = UART(1, 9600)
% ~9 j0 Q/ V: R+ F: h - uart.write('hello')+ I) H- J% D0 w: E" i2 R8 w
- uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI& l" e' j- G- p# A
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- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
M: }6 }: F4 ?. k$ S - spi.send('hello'). K3 R! E* |! ?- k3 ^9 o! n! f( ~
- spi.recv(5) # receive 5 bytes on the bus
3 w6 z; D8 |' _ - spi.send_recv('hello') # send and receive 5 bytes
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0 j8 W9 y& S, Y% R- VI2C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* [$ \8 m( q& W( t
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- i2c = I2C('X', freq=400000) # create hardware I2c object* p- N G( Q2 w
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object- ?8 K* m. {$ ^. ]! g4 b2 \% Y; M
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- i2c.scan() # returns list of slave addresses' x9 e6 {, H/ G/ `( m
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
$ N, w& G0 [ [. f1 _+ I" ^9 Q - i2c.readfrom(0x42, 5) # read 5 bytes from slave
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10$ `8 [+ a2 v; }
- 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。
- z# g. T( p f0 Z. n: v7 A- }. nI2S总线参见 machine.I2S. - from machine import I2S, Pin% e4 y( R2 X; k7 r6 ^. [2 j: c! a
8 M9 J' ?, S' ^( q& a ` m- 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
% V2 c6 _4 y0 A& G5 i - i2s.write(buf) # write buffer of audio samples to I2S device
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\$ X. o- N# u' B+ T& E- K- 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" F+ z) _( v' J( `7 P! i. Y% Z9 i4 x
- 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。 / v% {) v% P2 w" p* |
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN$ r1 M5 ^* F- t5 u$ q! \
: u) t2 V* J. X- can = CAN(1, CAN.LOOPBACK)" V! X0 {" C) C1 c$ O5 p$ J
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))) {- b9 B8 f$ [6 k! G3 R( v* y
- can.send('message!', 123) # send a message with id 123
9 o1 S; N: h5 _. ?$ j( n# } - 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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+ u4 X6 n( V: z7 z- accel = Accel()
/ {0 K; N5 I! A - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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