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:
- ~5 j9 B0 X- } W7 y m& T通用板控制见 pyb. - import pyb
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/ R7 v( T, W" U" R7 H- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)6 F& s2 V3 [7 E$ T3 s
- pyb.wfi() # pause CPU, waiting for interrupt+ x" Z3 O! t6 i8 ^4 g( s6 `
- pyb.freq() # get CPU and bus frequencies1 c) J: E z" F9 E2 I9 b4 e
- pyb.freq(60000000) # set CPU freq to 60MHz6 t9 O1 M& H8 i- v! o4 Z4 @
- 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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0 n8 l( v5 S1 g! u9 p+ V- time.sleep(1) # sleep for 1 second+ A* E+ I# y* Y6 J
- time.sleep_ms(500) # sleep for 500 milliseconds
) ^9 d: ]8 ]" [! j4 H - time.sleep_us(10) # sleep for 10 microseconds
/ Y3 A. Q( R) w5 H7 B - start = time.ticks_ms() # get value of millisecond counter# b% p, F; P# @: E' M
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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; p7 y# }$ t9 J" {内部 LED见 pyb.LED. - from pyb import LED
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5 C/ C( }' t: f- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
' N& M6 c7 W6 s( @* X* M - led.toggle()0 ]3 p* h* R6 h% S8 D
- led.on()! O' W* ?" F' Q( N7 t$ T3 o
- led.off()) y6 b. C) F! S$ A. }0 f
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- # LEDs 3 and 4 support PWM intensity (0-255)" N' w( ~3 a' O, ?% M2 M- U
- LED(4).intensity() # get intensity6 H: _/ _5 u, z9 N4 {
- LED(4).intensity(128) # set intensity to half
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! {4 D9 m0 L; d, k' t内部开关请参阅 pyb.Switch. - from pyb import Switch
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- sw = Switch()* o' _1 v! N* Q& h
- sw.value() # returns True or False
# Y' A* d, q6 J, l - sw.callback(lambda: pyb.LED(1).toggle())
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引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin* P+ d, S+ Q, H+ b. m
' k% D2 P. p- {$ v: u2 u1 b- p_out = Pin('X1', Pin.OUT_PP)
$ d& S( g/ k. e- T+ I( O- ^" m - p_out.high()
: ]) X: `2 f Y) F4 z! t% D - p_out.low(), T( Z8 l; X$ g6 d) Z* U5 q! o1 G4 ?% o
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)9 z& S7 c, G' F0 s7 @% e" Z
- p_in.value() # get value, 0 or 1
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; l' o) C2 c8 N1 L+ U# l+ [伺服控制请参阅pyb.Servo. - from pyb import Servo
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- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)3 u/ p9 l D5 Y0 r- V0 w: p4 n
- s1.angle(45) # move to 45 degrees
) J( x9 h; v5 G! u9 c( y8 q - s1.angle(-60, 1500) # move to -60 degrees in 1500ms8 W/ V& z# ~5 r# e6 T! }
- s1.speed(50) # for continuous rotation servos
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1 n; O# N9 }3 x6 E2 x外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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. q3 s* ~, D2 U8 C3 `+ r- callback = lambda e: print("intr")7 ?8 X7 _% c4 u7 {9 p5 H' i
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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, A8 g0 V$ g3 q; d3 M! [计时器请参阅pyb.Timer. - from pyb import Timer3 z- @+ b3 h# p8 O3 |
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- tim = Timer(1, freq=1000)( _# H/ g) Q$ T) R
- tim.counter() # get counter value
, p: b2 N: m, q' | - tim.freq(0.5) # 0.5 Hz# E) i; X6 u2 c1 v; Q& Z# ?! ^
- 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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8 @& c) L; ?0 c- rtc = RTC()
' F! o4 F. s8 } - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
4 L) e4 F9 `9 F8 u! n$ t5 b3 h3 [ - 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) B9 m' K! x7 L8 L: j$ w
3 C! T0 M ^9 ^& ?! M- p = Pin('X1') # X1 has TIM2, CH1+ Y1 A9 n$ L" N0 F* F% s) f+ A
- tim = Timer(2, freq=1000)
7 Z1 T- r9 K# T( m - ch = tim.channel(1, Timer.PWM, pin=p)" [4 r) |4 |7 _; j
- 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
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* ?/ l. w$ @) z7 O# w0 H- adc = ADC(Pin('X19'))9 X* R( ?& Y8 ^/ L% U& G
- adc.read() # read value, 0-4095
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6 K7 i& W, O/ j* f) J* c# Z4 n/ lDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
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# I! j7 `5 B: @5 j- dac = DAC(Pin('X5'))- g5 M4 Q% Z; [; p! s, e5 W& K1 h5 X
- dac.write(120) # output between 0 and 255
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, E1 r' P8 T: D, W8 R6 T) }UART(串行总线)请参阅 pyb.UART. - from pyb import UART
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5 X% o: s2 N. X1 T" C# [+ O- uart = UART(1, 9600)( Z" v t2 f" J
- uart.write('hello')) Z9 x% `5 T: ]! [1 ^* Y Q
- uart.read(5) # read up to 5 bytes
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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)
$ c& U0 T, O: J, F - spi.send('hello')
1 W) Q; M" ]) k: _& Q2 z' m; e - spi.recv(5) # receive 5 bytes on the bus
5 E7 j8 K8 g2 @$ ^ - spi.send_recv('hello') # send and receive 5 bytes
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. b( p( t3 r/ }( @1 ]" sI2C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. l( Q/ s) L8 z- [
e @7 \5 X) E4 q6 h- l- i2c = I2C('X', freq=400000) # create hardware I2c object
?- w; `8 E/ G2 {7 X6 l - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object3 Z+ w: I" ~1 f1 N# v, `3 h- Q9 y
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- i2c.scan() # returns list of slave addresses
$ q7 r0 }5 V8 V; N* ] - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
. H8 Q9 Q+ U) K5 v, F - i2c.readfrom(0x42, 5) # read 5 bytes from slave
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+ x/ y* E0 w$ n; y- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
& q S6 Q5 B, @ T - i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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0 ~0 ^2 G) L$ G4 j2 @3 U1 r1 K注意:对于传统 I2C 支持,请参阅 pyb.I2C。
" f0 ~3 T4 W! f4 V/ j5 N0 bI2S总线参见 machine.I2S. - from machine import I2S, Pin
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- 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
3 G0 x2 Q6 t# k! m' w - i2s.write(buf) # write buffer of audio samples to I2S device5 g, w' f& J& T2 |% d9 I
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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
4 f6 `8 i% ?, R. @ - i2s.readinto(buf) # fill buffer with audio samples from I2S device
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+ w5 G' L: [' W1 R0 oI2S 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。
* F. `- G' F6 Q/ p# D3 OCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN" P; \0 D7 _* d% D. Z
6 u4 c+ Z/ `( p0 g- Z, S# t- can = CAN(1, CAN.LOOPBACK)+ t6 Y, ~1 G K6 R
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
' A. [2 ^0 m7 [2 C6 W5 V - can.send('message!', 123) # send a message with id 123
4 |2 e; i* i5 B3 _ - 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 Accel8 W! y# o8 j; V( T( w
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- accel = Accel()9 r. }9 h- N! ^; M
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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