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 G( f- N z2 r- \, l9 Q" E
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)0 y4 |: ]4 b e/ t7 l; ~4 Z
- pyb.wfi() # pause CPU, waiting for interrupt
3 U9 p% w+ K* c: n8 Y - pyb.freq() # get CPU and bus frequencies
0 U1 V$ L3 ^" d1 D5 h% J/ c' h9 l - pyb.freq(60000000) # set CPU freq to 60MHz
% ?& i( z1 D2 i5 o/ l: M - 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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4 u/ M2 S9 |7 R6 T9 u& ^- time.sleep(1) # sleep for 1 second5 }+ ^ f/ h1 r/ D. T0 u O
- time.sleep_ms(500) # sleep for 500 milliseconds
6 X, D5 @9 v9 b( d, c - time.sleep_us(10) # sleep for 10 microseconds, x4 Z' Z- j. p( B
- start = time.ticks_ms() # get value of millisecond counter6 E6 C9 a; ^$ W! r: n$ l: j7 _
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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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
* B8 S8 P9 d+ V ` - led.toggle()- G% l& P) v/ z
- led.on()
4 {9 @5 [% v# a5 N6 q - led.off()9 L9 E" K+ p; _" C4 I) e8 T- `
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- # LEDs 3 and 4 support PWM intensity (0-255)
$ A9 b" T* _: M$ n p - LED(4).intensity() # get intensity6 r4 h( o( W. ^4 F+ @
- LED(4).intensity(128) # set intensity to half
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" ^" ]% n0 A- g内部开关请参阅 pyb.Switch. - from pyb import Switch
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; S/ y$ a. e; b% q W- sw = Switch()
9 S3 I* _+ p. b: R - sw.value() # returns True or False- `- _- B. t: _ l, x5 Q
- 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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- p_out = Pin('X1', Pin.OUT_PP)0 J+ q* G: p: a+ \+ V
- p_out.high()5 {, P6 v, u! P) [/ A
- p_out.low()/ z# [. t- f9 R3 j: k* n2 `
7 [0 Y. `( D" ^* Y4 x, m" b- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)! ]1 U% p& h2 |) T
- 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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0 E) N, V1 d. [9 k5 ~# T* I- s1 = Servo(1) # servo on position 1 (X1, VIN, GND), D8 I) i7 f+ A2 e4 H
- s1.angle(45) # move to 45 degrees
- V% _2 H8 ?4 _1 @ - s1.angle(-60, 1500) # move to -60 degrees in 1500ms/ A5 r( x/ G3 z; e( n$ n6 [
- s1.speed(50) # for continuous rotation servos
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外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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5 q" D3 F+ b$ \! n W7 V- callback = lambda e: print("intr"), k- p6 s. {' K V$ `" S
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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计时器请参阅pyb.Timer. - from pyb import Timer) s. k$ l. A! F w H
! n( x; B9 X. F, c6 v" Z- tim = Timer(1, freq=1000)1 F, v& V7 q; a9 E/ k/ z8 B
- tim.counter() # get counter value
6 D$ a6 R; U) a5 Y. @8 i - tim.freq(0.5) # 0.5 Hz5 V9 a* }% r0 p! K( k7 H& T2 u
- 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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1 {& k l5 g/ ]6 ~- rtc = RTC()/ d) F6 \1 P( I, ~ X
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time8 y; _ j8 D% A# T1 R
- 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' L+ K) C/ X9 o
+ B' y, p' e' ?: Y6 W- p = Pin('X1') # X1 has TIM2, CH11 A% p! O8 b! v, a9 u/ f! C- |
- tim = Timer(2, freq=1000)* I7 c+ z t; X: W( B0 M
- ch = tim.channel(1, Timer.PWM, pin=p)9 Z4 g5 H, V/ h+ i! b% b4 n
- ch.pulse_width_percent(50)
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1 Z5 t. A s" ?, h9 lADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC x; d6 p$ O5 C8 \. N' P
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- adc = ADC(Pin('X19'))
5 O4 |' c/ g9 X! Y - adc.read() # read value, 0-4095
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' P6 ?: q k6 f# I7 W- SDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
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* D4 O. u3 y0 u7 L9 c! L- dac = DAC(Pin('X5'))
2 B& ^. k7 x- W4 O" O: L - 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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) S% r+ P- f. l7 A3 }6 \* |- uart = UART(1, 9600)/ ?. m9 x/ X* Z" x1 R& G
- uart.write('hello') p7 {0 g' x) ]. m
- uart.read(5) # read up to 5 bytes
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/ c. |& I3 Y. t f" l: C" ?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) f3 E( l/ r1 k* T* l w
- spi.send('hello')( a* X& Y2 _6 R% b5 ]0 M: b% E
- spi.recv(5) # receive 5 bytes on the bus
, {, R7 v# b0 a. j: Z; r. J. ` - spi.send_recv('hello') # send and receive 5 bytes
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I2C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
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- z2 q+ M& ^8 P- i2c = I2C('X', freq=400000) # create hardware I2c object
- |1 E) w: d; _ - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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$ Q5 H. o% ]. h/ _7 G" g! @7 h- i2c.scan() # returns list of slave addresses
9 j3 m& M4 @# T, ] - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
3 D8 P! @* }2 t0 h# G; V" u6 r0 D - i2c.readfrom(0x42, 5) # read 5 bytes from slave, R- p# D1 T2 i
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10* S/ _- e; t; T8 I3 [0 Q
- i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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1 w5 n; Z9 T; Z9 J0 N! }7 o% q注意:对于传统 I2C 支持,请参阅 pyb.I2C。
" z- \9 i2 k$ f! }' oI2S总线参见 machine.I2S. - from machine import I2S, Pin7 c% {$ N* s8 J
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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
% V$ w* n8 g8 d4 D8 [# t1 Z* x! L - i2s.write(buf) # write buffer of audio samples to I2S device) u. _( F" |5 O6 f6 j5 j
% w+ Z' C' i3 z3 i- 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/ h7 D5 o9 g+ p. L# n$ I1 m) [
- 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。 . [! W8 a8 u; W6 q$ B' W
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN" U/ c2 ~" N+ z
; y1 u! p2 p# l4 P8 `& k- can = CAN(1, CAN.LOOPBACK). C% @- Y: L7 n* W/ j. g
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))- e7 z% V4 c) y8 i
- can.send('message!', 123) # send a message with id 123, C6 m& n( `* |; L; S
- 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()
1 ?) `1 ~' q2 Z7 _! i - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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