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:
I4 [- k: `2 P* I9 G4 ~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)$ y& A" u5 M+ {6 Y) Z+ _
- pyb.wfi() # pause CPU, waiting for interrupt
: \2 Q8 _3 t) y+ w# }1 I - pyb.freq() # get CPU and bus frequencies% N5 _! L+ f3 l, e q2 w
- pyb.freq(60000000) # set CPU freq to 60MHz2 \' P) j5 C/ d. @7 p
- pyb.stop() # stop CPU, waiting for external interrupt
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, u4 s( ?* h+ i6 f* n% |; ` F) S延迟和计时使用 time模块: - import time
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+ H1 V1 P/ h K- time.sleep(1) # sleep for 1 second* k: U1 c6 f w4 V& n6 S% U5 o1 T) j
- time.sleep_ms(500) # sleep for 500 milliseconds9 ]) g5 c' k k3 G' g) m- _8 A6 H
- time.sleep_us(10) # sleep for 10 microseconds
: Q) w7 m& R3 v( w- a5 Y+ @; } - start = time.ticks_ms() # get value of millisecond counter
3 s B9 \+ ^( a - 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! f/ `4 b* q, v
; e8 j) }- Y# C0 u9 m/ W- Y: k4 }4 F- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
- c2 s9 c6 @ O - led.toggle()7 R; x" a3 V+ l0 C @# [+ p- C, P
- led.on()
3 o f' p; Y+ y- h2 X - led.off()
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$ g- Z, O- o$ _, t9 @- # LEDs 3 and 4 support PWM intensity (0-255), {1 Y U% ]; I: N) i0 J4 R
- LED(4).intensity() # get intensity
& G, ?) n# }1 c/ s5 h - LED(4).intensity(128) # set intensity to half
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& R* _5 d* m7 L8 h3 d6 n0 f- ^% \内部开关请参阅 pyb.Switch. - from pyb import Switch
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- sw = Switch()
/ a5 Z; L3 W1 N - sw.value() # returns True or False- b6 r# k9 b* n2 {" c6 p1 @
- sw.callback(lambda: pyb.LED(1).toggle())
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1 Z& V2 u3 z3 o6 T& Y引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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- p_out = Pin('X1', Pin.OUT_PP)
* {* R+ x6 ~0 s+ I& a4 F - p_out.high()) g# V* f$ ?3 x6 q# S% u/ E
- p_out.low()
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
I* D: R4 h9 i9 P& C+ o - p_in.value() # get value, 0 or 1
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( V3 ?3 O N/ z7 @/ T% y. }6 w' @伺服控制请参阅pyb.Servo. - from pyb import Servo& [: ~' j* w2 I' t) C
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- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
0 B b Z4 h5 |# |. V! K5 N6 b8 A( z - s1.angle(45) # move to 45 degrees
U# g2 X. j' W0 V/ L - s1.angle(-60, 1500) # move to -60 degrees in 1500ms5 {: @" M; `: f0 N1 H7 d
- s1.speed(50) # for continuous rotation servos
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9 f4 F4 {" O2 f, \% y; j; m外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt4 J. S4 _4 `; X5 k2 l4 G
, `# n. ~0 Q$ U3 q- A6 \2 J- callback = lambda e: print("intr")* |9 r; ?3 @( J; ~
- 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
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- tim = Timer(1, freq=1000)4 X: f- _- m& g0 B6 @ ~2 v0 g1 v& Z
- tim.counter() # get counter value
d7 S; A8 v' G - tim.freq(0.5) # 0.5 Hz* Z. G9 X% \3 z% n t2 `* O
- tim.callback(lambda t: pyb.LED(1).toggle())
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& c* E. C; q, Q: m$ MRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC+ x; P9 B4 w9 I, I
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- rtc = RTC(), G P, ~; j% m5 O* B' t# L' N
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
. ?2 u9 V+ R1 d3 z, K: P' R5 y - rtc.datetime() # get date and time
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( [$ `4 K0 T3 E, S# p1 X/ }PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer% s/ F* `8 c" z7 B& l
/ e' v) r2 h. C! P) }! n- p = Pin('X1') # X1 has TIM2, CH1
" _3 i2 P5 h* v1 o - tim = Timer(2, freq=1000)
I: y2 a7 C+ C' ~% ] - ch = tim.channel(1, Timer.PWM, pin=p)5 _# Y. x) V& {: j+ M' l: w
- 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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- adc = ADC(Pin('X19'))
2 i; e0 d# H. y: D - adc.read() # read value, 0-4095
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" P( f& E Z0 [! IDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
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2 z2 ]' a! D. e% c- dac = DAC(Pin('X5'))
g! W5 ], h% c9 u; \ - dac.write(120) # output between 0 and 255
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, h5 M9 @5 T* z* S* W# `; p$ zUART(串行总线)请参阅 pyb.UART. - from pyb import UART' B0 y1 V2 L9 g) p
$ @6 z. S. } f5 p$ e' L- uart = UART(1, 9600) s% v8 k2 a" [* z5 `$ L
- uart.write('hello')% x. s( ]/ w' {4 a- E
- 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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! ~; D6 F: v3 R6 Q/ g6 ]- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)) W" r' n, }: n+ Z
- spi.send('hello')
: S& {( j4 V5 H% J+ C" g& ?4 q2 A/ F - spi.recv(5) # receive 5 bytes on the bus
0 M; Y6 A8 j% Q/ U1 L& l - 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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- i2c = I2C('X', freq=400000) # create hardware I2c object
9 M" }3 u; Y U' O+ W2 B4 | - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object) f8 p2 j8 ?( t/ h9 `
9 L1 ?4 s4 I" M; F4 X! l3 q- i2c.scan() # returns list of slave addresses
8 W+ Y; u7 w" @: u+ ]' y b - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
4 w3 A% P7 U- c# d8 H, e - 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 0x103 r i' u9 [7 g; Y
- 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。
+ M5 }8 v5 _% E8 M# XI2S总线参见 machine.I2S. - from machine import I2S, Pin
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0 J u2 @; W; X, N( ]- 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: X/ o( d f5 @7 ` E. b: N4 G" k: y
- i2s.write(buf) # write buffer of audio samples to I2S device' @6 A( Y! j, W" N7 T
% \) K; j( r* b8 ?! W- 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# F4 _6 B `" k5 x+ m. j# K
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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0 m, B6 E# ~8 c4 p1 g/ p& f- @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。 . @# Q- t" s9 D) O5 Y7 z* R
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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" k U* L0 s+ k7 s# T5 z- can = CAN(1, CAN.LOOPBACK)9 {, p: l4 ~" s1 z+ l
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
) z! p0 K5 m& C- L& W - can.send('message!', 123) # send a message with id 1238 x& e- [: i: B; c: ~
- can.recv(0) # receive message on FIFO 0
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9 k8 v# G4 g( ] j* ]( _/ Z内部加速度计参见pyb.Accel. - from pyb import Accel
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' Y1 C, ^$ y# L: H* o$ ]( Z- accel = Accel()
. b1 d7 y4 K# H& u' j0 q6 t - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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