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: * n" W: q m1 k( Q* ]& x7 f
通用板控制见 pyb. - import pyb
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6 `9 x, `" [' d. D6 @- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
$ j0 b* ^, e5 s8 a/ m* K - pyb.wfi() # pause CPU, waiting for interrupt# c- E0 T# r L; K$ e
- pyb.freq() # get CPU and bus frequencies+ }% l+ E3 N+ W
- pyb.freq(60000000) # set CPU freq to 60MHz* o9 C' k; x$ V z# k6 w* x8 i3 p
- pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time1 s# {& S0 Y* ~. `) j0 N& u
5 @3 e/ {. N) ~4 O6 f' L, q- time.sleep(1) # sleep for 1 second u( d. W1 a1 A: C
- time.sleep_ms(500) # sleep for 500 milliseconds
0 Z; P3 b7 i1 a( O! c! _, i7 `; z - time.sleep_us(10) # sleep for 10 microseconds8 e: S$ Z# W: U7 D1 B1 z
- start = time.ticks_ms() # get value of millisecond counter- `7 n- U2 J- S' W/ B/ }5 k; ^
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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0 z& v# r( W9 |! m2 [! g. ~内部 LED见 pyb.LED. - from pyb import LED
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+ P/ H% V5 s8 W+ Z+ d4 ^7 b- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
' l3 Q/ ?$ c5 I2 [! M# h - led.toggle()
Q% l7 k C2 x - led.on()* Q* |) x7 |& h, }$ k( [) }
- led.off()0 U& F& f2 L8 m
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- # LEDs 3 and 4 support PWM intensity (0-255)
5 h1 }( k0 v( @8 F - LED(4).intensity() # get intensity/ v- R( {$ y# M, e1 j- P
- 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/ |* s! X% E1 p# o
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- sw = Switch()5 |% b3 a) k1 i0 T i! E
- sw.value() # returns True or False) R d' M3 n2 R3 @" D8 ?1 h
- sw.callback(lambda: pyb.LED(1).toggle())
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+ @. ^2 m. b0 \( A$ w3 Z; E& ]1 p/ y引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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3 V7 m. ?" M0 ~& E5 b- p_out = Pin('X1', Pin.OUT_PP)8 H7 K) M X5 W
- p_out.high()
/ _0 H+ Z6 J* b+ i l4 J - p_out.low()0 ?( X( G5 H8 x$ U
- # T2 b% d( j" _0 i' r
- p_in = Pin('X2', Pin.IN, Pin.PULL_UP) E+ r/ L0 H2 Y$ t3 C6 s& O
- 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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5 \0 y2 \' `' g* e& @: X% i- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)' d: f6 n7 e! U9 s" h
- s1.angle(45) # move to 45 degrees
" I8 g( \" q4 D x) D9 c$ Y - s1.angle(-60, 1500) # move to -60 degrees in 1500ms- a7 ?8 e: s7 o
- s1.speed(50) # for continuous rotation servos
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, [: J9 O3 I8 d" ?- U( n" u外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt: R% P. J9 G% p3 ]7 y
& _ ~- C( `$ w/ r- callback = lambda e: print("intr"), s( g4 N6 i. k$ o+ m
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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4 Y, C" T) r( {0 _. P, a4 }计时器请参阅pyb.Timer. - from pyb import Timer5 B, \% ~' ?& [1 j
7 u; b- H6 q9 {: ?- tim = Timer(1, freq=1000)
7 Q# h9 O8 J8 l6 |# @( J# v - tim.counter() # get counter value% B6 Z7 m( M0 y# G, S
- tim.freq(0.5) # 0.5 Hz
) @8 [6 D& s6 g8 ? - tim.callback(lambda t: pyb.LED(1).toggle())
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9 k6 x: b. S+ I9 ~0 U1 n9 mRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
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- rtc = RTC()
3 V5 h3 {% J9 f/ ]& G- V* ] - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
& n- q6 A# B( f. D2 q7 B( Z; A - rtc.datetime() # get date and time
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) I+ E( [9 \! [' ?$ z1 ?PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer
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9 t% I" I$ }, ~+ f: t5 f# F- p = Pin('X1') # X1 has TIM2, CH1
3 D% |* q# {: m2 D N0 H# I3 { - tim = Timer(2, freq=1000)" r g' y4 L7 H" H
- ch = tim.channel(1, Timer.PWM, pin=p)! x5 h" p o# T Y
- 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, ADC2 s5 c7 ^2 |3 h5 K
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- adc = ADC(Pin('X19'))1 _. Z! _- B, b. K+ P3 g( n; V
- adc.read() # read value, 0-4095
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. D& h& K* {( D1 a! fDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC, I# u8 C C- Y8 N; d* h
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- dac = DAC(Pin('X5'))
5 o" u* M$ r4 N/ O E - 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 H6 E( l8 K) j" J7 L4 d
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- uart = UART(1, 9600)
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# S8 O5 l0 E" a1 z - uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI6 \& e, G0 k. z0 b: o/ G/ l! k; d
: z* y! u# |* g( S- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)3 A5 M5 Z3 ~+ _$ o
- spi.send('hello')
. D4 Y, E3 Y! N* K5 O - spi.recv(5) # receive 5 bytes on the bus
' I0 ^% p8 ~0 P0 B) k7 G% i( p5 z& f - spi.send_recv('hello') # send and receive 5 bytes
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. S& A( x4 J- l. k$ PI2C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* t! q+ n- J4 C/ R" X
, U; [ Y& n' V# M- i2c = I2C('X', freq=400000) # create hardware I2c object
3 m8 B$ w9 i1 |7 L0 u5 j- ] - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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- d2 f% A- e+ x* k5 z0 V- i2c.scan() # returns list of slave addresses
4 G/ ], p+ c1 T% v3 H) x - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x422 N2 i4 ]* b( \2 c h5 Z
- i2c.readfrom(0x42, 5) # read 5 bytes from slave( W: ^9 h4 d, y5 e
. Y$ `' `6 V8 c8 M- d- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
; C* t" F* i. f$ h - 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。
% P* {, G% U* XI2S总线参见 machine.I2S. - from machine import I2S, Pin
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1 k( `( n9 ]5 i- 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
# W4 T7 c8 ?! {$ w - i2s.write(buf) # write buffer of audio samples to I2S device
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; X+ ]0 }3 U+ t7 {0 \- 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
( ]$ n' y1 t' Z' f - 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。
) k: c0 ` P5 ~, K/ `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)
; |6 _' |5 q: k# m6 q- Z - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
$ ~: N" Q) p1 q. W4 R+ o - can.send('message!', 123) # send a message with id 1236 g" U, V, J- [: v9 ]
- 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()! Q0 W: {9 X7 R+ @) N
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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