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:
% ~; F$ P" J8 X" w+ R3 `通用板控制见 pyb. - import pyb! x# Q$ [8 W( c- Y$ x5 k; L
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)# R6 n7 ~) e; ^7 N8 p1 @$ b0 c5 x; m
- pyb.wfi() # pause CPU, waiting for interrupt+ t: y+ u/ `( n( R3 V
- pyb.freq() # get CPU and bus frequencies4 ^% s3 e; a2 y6 k. F- e. \
- pyb.freq(60000000) # set CPU freq to 60MHz% n$ S" l9 [" _
- pyb.stop() # stop CPU, waiting for external interrupt
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6 u! w/ d3 y, a3 T7 `* _7 a延迟和计时使用 time模块: - import time; O! ~7 P. s5 P1 v# f
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- time.sleep(1) # sleep for 1 second7 b# j# ^6 u# b* h
- time.sleep_ms(500) # sleep for 500 milliseconds/ k8 A6 }7 y5 D1 s( F0 k
- time.sleep_us(10) # sleep for 10 microseconds
$ A; C( J' U6 W5 r# V7 j - start = time.ticks_ms() # get value of millisecond counter
* n* R8 G8 ~4 s" n: m! p: s5 r - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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/ p* Y5 p" i. R# |: N* _6 z+ H内部 LED见 pyb.LED. - from pyb import LED
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
# e ]. b3 H& a4 }( o/ }* u8 K - led.toggle()
2 S3 z) }+ B: Q# {: ?$ S - led.on(). d: y, \" b) M( i" C
- led.off()
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- # LEDs 3 and 4 support PWM intensity (0-255)+ J! r. F: m" M' T- b l
- LED(4).intensity() # get intensity
: l( f; |, S1 T) \: @ X - LED(4).intensity(128) # set intensity to half
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, _0 D. Q5 x) s2 x0 p0 `内部开关请参阅 pyb.Switch. - from pyb import Switch1 Z* N, M8 e- \+ j- E! c
) [$ a2 J% |7 w* O! W a- sw = Switch()
% O( }6 w1 \! I# h5 b* O; o0 \ - sw.value() # returns True or False) W' [1 D; D% j
- sw.callback(lambda: pyb.LED(1).toggle())
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; E* ~; J* h& `4 ^' C引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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$ n+ V# |: s, G2 e# ]! t- p_out = Pin('X1', Pin.OUT_PP), z6 b2 m1 r: ]6 h, _ l7 h: J- ]
- p_out.high()
^% n+ ]) U c8 ? - p_out.low()* A, R3 W' G+ w: u/ V4 l( `
3 @) _( D3 ~* L- `- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)9 `" p- C/ L7 H9 j0 w
- 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( h6 ~! Y9 l9 H# F4 _
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- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)0 f* s: x/ |5 E) D- Y4 `
- s1.angle(45) # move to 45 degrees
0 l* o$ }; a9 f# k$ q6 ~! C8 W - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
* L! m" S' B8 ^( l - s1.speed(50) # for continuous rotation servos
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, `* }. k. j! T8 ^外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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1 x' ?+ I3 h N5 f' Z" z- callback = lambda e: print("intr")/ u, m7 y) e3 Y# G" L
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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) L0 K* O3 e! l! }" B4 ]* V M计时器请参阅pyb.Timer. - from pyb import Timer5 }! B' f3 X/ @9 g6 E+ N
7 [* p6 q7 x: t, n9 `5 T: C/ o- tim = Timer(1, freq=1000)
7 _. [! K6 y/ f) f - tim.counter() # get counter value- v1 O& ?8 B# \* ]/ T. A* `- k7 C6 d
- tim.freq(0.5) # 0.5 Hz
- [ k, u6 f$ f. }+ h, J( } - tim.callback(lambda t: pyb.LED(1).toggle())
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: ?9 f8 z5 i7 M+ oRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC% I" ]5 u, r4 F$ E" Q
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- rtc = RTC()
1 `/ Z4 W- E( h4 H - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
- t9 [* ]0 P8 j4 y! z3 d" t2 o- I Y - rtc.datetime() # get date and time
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, F. K% f# @8 i" `PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer5 z0 a" z* J/ @
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- p = Pin('X1') # X1 has TIM2, CH1. s R2 @) l1 A+ O4 U7 I& Q
- tim = Timer(2, freq=1000)
0 d7 ^% J, A6 e, F- v1 q - ch = tim.channel(1, Timer.PWM, pin=p)
@0 W4 ` `# q - ch.pulse_width_percent(50)
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" e1 w) w- @ G% JADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC! n# g H! T# K! F# g" y* V
4 z. C8 j; E- O- adc = ADC(Pin('X19'))" i0 e n9 r! Q$ d+ X
- adc.read() # read value, 0-4095
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$ c( [- w* G& ^4 G- E) @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'))$ s$ `2 ^. r: O
- 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 UART9 J! z$ {( _6 E7 `9 U, h. b$ h
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- uart = UART(1, 9600)4 X! h9 c3 S* c- r9 N
- uart.write('hello')- a6 \0 n0 n& d8 F) d
- 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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3 A! O) p/ q5 C% E- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
3 N, z, s6 q' t; n) D$ [) i - spi.send('hello')
1 C/ p3 ?7 j1 i% A- y, o& | - spi.recv(5) # receive 5 bytes on the bus$ G7 q- U# S% ]
- spi.send_recv('hello') # send and receive 5 bytes
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* V- ]# r' t% v" lI2C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- R* w& _ v6 U4 {* [$ G" g
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- i2c = I2C('X', freq=400000) # create hardware I2c object4 Z1 L3 v* ?9 k% q& m; }
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object6 y/ I5 Z' G: ~; d5 p# Y% Y
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- i2c.scan() # returns list of slave addresses
3 X* t$ [2 E$ M/ C - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42: d+ L4 u* _# r. G" v
- i2c.readfrom(0x42, 5) # read 5 bytes from slave
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6 I; t0 W8 `* v% j0 K, ?) a/ S! ]- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
& n" E: I$ f. p, P- X - 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。
- Q* Y3 k( x+ k0 W; \I2S总线参见 machine.I2S. - from machine import I2S, Pin
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6 H) Z% m/ n3 j4 `5 H- 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
* [, u1 _4 a0 P: u5 q) a/ U - i2s.write(buf) # write buffer of audio samples to I2S device$ X# [' h' h2 z' X0 ^
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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- [, U }# H( z9 f/ \; w
- 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。 ! ?) w" t ]: O" K C) G( 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)
8 {5 ^4 m( X" g5 B8 r$ } - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))/ m9 F- E$ ?; k3 S4 L
- can.send('message!', 123) # send a message with id 123
Z7 G, U7 e; s7 o - can.recv(0) # receive message on FIFO 0
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" Y7 ~! K5 o: J) r内部加速度计参见pyb.Accel. - from pyb import Accel" D6 ^- h/ ?& R5 t' u- J! ~, v
5 p$ Z7 t' `" y3 q6 ?+ A8 `; R7 k- accel = Accel(). H" H9 U8 r3 W3 ]) R
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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