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:
+ ~* ]" D7 A9 l' v5 v1 u通用板控制见 pyb. - import pyb
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1) B/ z+ J# @1 ` L- X3 w
- pyb.wfi() # pause CPU, waiting for interrupt
$ |7 \, h/ I( O0 P - pyb.freq() # get CPU and bus frequencies" A- E1 |0 x) C6 |) w
- pyb.freq(60000000) # set CPU freq to 60MHz
& F+ e$ p" y( h$ k; l - pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time$ w# e8 z4 P- p4 F$ o( r7 @5 U
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- time.sleep(1) # sleep for 1 second8 W; v# i0 b% C; k
- time.sleep_ms(500) # sleep for 500 milliseconds
) Q- o% L6 H0 ~5 s& N - time.sleep_us(10) # sleep for 10 microseconds
: ^/ L& b e$ N) i2 E1 @( v$ e - start = time.ticks_ms() # get value of millisecond counter
+ s( a/ ^6 {* D9 Q) T - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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h) o; n5 {( Q. i* Y内部 LED见 pyb.LED. - from pyb import LED5 [- @9 N3 A8 ]- W8 n) Y' P
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
( R0 y6 X5 |: E, X' f - led.toggle()
" W* t2 Q& F; [3 b0 L. f: D: F7 F% { - led.on()# K* p: Y4 T7 z- ~
- led.off()
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- # LEDs 3 and 4 support PWM intensity (0-255)' u7 q0 D4 q" U5 k( H* h
- LED(4).intensity() # get intensity, u- b( j$ M6 c& h: C$ `7 @
- LED(4).intensity(128) # set intensity to half
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) k& F z+ f2 t) Y9 o+ [) a内部开关请参阅 pyb.Switch. - from pyb import Switch
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( Y% B* J' C* q q: U9 N+ ]- sw = Switch()
5 V! n% R; `9 A1 Y6 h+ S5 l - sw.value() # returns True or False
: f$ Y3 J' ^3 E4 k9 {" e8 k$ p1 g - sw.callback(lambda: pyb.LED(1).toggle())
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# p. A- i [7 n7 u* \引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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6 v' Q+ S; C" s9 o- p_out = Pin('X1', Pin.OUT_PP)
( ]# M$ j8 U& n6 R) u: b: l - p_out.high()( k- P( ?& ]$ D$ p. t. b0 z
- p_out.low()$ `: X4 A/ e- L3 M9 M8 Q9 ^
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
* u8 G5 e, Y3 `% _/ E - 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* F' c$ t: y% J# b! z9 q
; s! `% D4 @5 Y3 l; |$ F% E, ?- s1 = Servo(1) # servo on position 1 (X1, VIN, GND) x' K) u/ R- ^
- s1.angle(45) # move to 45 degrees
, `: K/ I9 M- k* M - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
/ o$ K' l& |' _( P% B' S2 z - s1.speed(50) # for continuous rotation servos
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外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt6 \1 H5 L# p8 y- r( D
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- callback = lambda e: print("intr")
5 J* b! a, p* E- V! h$ G& b6 u8 R - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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7 y! b9 q" V. v G: X计时器请参阅pyb.Timer. - from pyb import Timer
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2 i b! `9 G: ` P$ c9 N/ }- tim = Timer(1, freq=1000)/ a; }/ s5 e% F. N' H
- tim.counter() # get counter value
; d8 H0 J& W2 r k - tim.freq(0.5) # 0.5 Hz
. E2 Y6 w& n, ^3 R! [- z - tim.callback(lambda t: pyb.LED(1).toggle())
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" m" e- |$ ?' w% j j* pRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC+ i+ j) M, F; {0 u
& G' `) Y# y& r: _8 `4 O r- rtc = RTC()( z$ b& U. p. W
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time. l, b5 x# T A9 d
- rtc.datetime() # get date and time
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& d9 r( q3 {/ t$ nPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer5 g- W; U \$ y9 H+ `: G0 U
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- p = Pin('X1') # X1 has TIM2, CH11 A, z9 h' c: a5 v0 o+ J. x
- tim = Timer(2, freq=1000)( h+ [! L( O- ^( t
- ch = tim.channel(1, Timer.PWM, pin=p)
9 u5 B2 D( a1 s( `0 w6 \/ [0 K! o2 H - 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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/ Y9 G! D- p" U U- adc = ADC(Pin('X19'))
5 D) I2 |+ z) a6 J7 B0 {$ a - 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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- dac = DAC(Pin('X5'))7 j4 H, ^3 Y/ u, Z
- 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)
6 g3 ^6 K( V& U B' e7 [$ z - uart.write('hello')
2 R7 }+ d* b5 c9 ]; ^+ 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
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, @4 D8 O' T% x9 t/ I5 P- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
4 T; F: v, R2 p2 x3 H, @7 x( n4 g - spi.send('hello')
5 s7 v8 k. Y# }7 W# h2 e - spi.recv(5) # receive 5 bytes on the bus
9 h' D. u# P9 O. M) s0 C - spi.send_recv('hello') # send and receive 5 bytes
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8 [4 _* C h1 d' A WI2C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. ]5 Z* Z2 q5 ?' S/ N0 c/ V% |7 w
2 H& ?+ ~# c" l- _- i2c = I2C('X', freq=400000) # create hardware I2c object: v8 J, @! x4 x: J
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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( y% I7 `; l2 k% k- i2c.scan() # returns list of slave addresses% Y" X; Q" U+ q0 t' r
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x420 b; K: P. _& R! R. j
- 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
+ n5 h5 `( z. H* W& w, m) Z - 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。
( ?# f# I/ e3 U$ P2 ^I2S总线参见 machine.I2S. - from machine import I2S, Pin; W& E* R" h$ w- N7 y
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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
; J3 l; h1 _1 ^; B+ i - i2s.write(buf) # write buffer of audio samples to I2S device
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3 V1 N M0 C! `7 n& H" U; M- 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& O9 A0 m, Y# V4 N6 n* H
- 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。
, x: ?! ^1 C5 [; g/ Y& u% ]- oCAN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)
- g. p1 Z6 g; r* f9 w, d - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126)) |# |& W4 d) m j s- J6 [& L
- can.send('message!', 123) # send a message with id 123
- L2 Z/ v" f) u h& A - can.recv(0) # receive message on FIFO 0
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) Y& H$ O- ]* Q内部加速度计参见pyb.Accel. - from pyb import Accel
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" T* ]6 ^- i( h$ ^/ i, H; @4 @- accel = Accel()/ B# l, q I; x2 M) N* K
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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