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:
+ [$ Y* p4 u9 |8 o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)
& G0 M3 M, K/ y# w, Q - pyb.wfi() # pause CPU, waiting for interrupt
7 L. f/ @% g u8 n* k - pyb.freq() # get CPU and bus frequencies
) F$ r* p4 ]" J O! ^ - pyb.freq(60000000) # set CPU freq to 60MHz( h' M# R1 c" c( b5 [
- pyb.stop() # stop CPU, waiting for external interrupt
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8 y$ ^6 {% z7 l4 {# y/ q' `延迟和计时使用 time模块: - import time3 z6 I: l4 d$ N* A, {% @6 J
' G' m/ Y, k% T' O- time.sleep(1) # sleep for 1 second
) q% e6 ]* Q/ |* y% H - time.sleep_ms(500) # sleep for 500 milliseconds
: ~6 [5 Q I( u8 c" q6 ] - time.sleep_us(10) # sleep for 10 microseconds7 s( ^$ P, R. S4 I+ K
- start = time.ticks_ms() # get value of millisecond counter
I, ^( |0 ?9 N( U& ?" n - 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. v( J4 l5 |0 l6 ]! U/ @. r9 k
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
3 u. `9 J% e! l% n - led.toggle()
% k: E# I7 K7 \! x - led.on()! C" C# f1 k/ d( j* E
- led.off() n) q; h* @4 {0 n. {3 z
% V" Q7 t [; w2 B) n% K) V) T( E- # LEDs 3 and 4 support PWM intensity (0-255)
) H C1 x6 d; Z5 m: v; L n - LED(4).intensity() # get intensity: P' n& f5 P& ~/ {3 C
- LED(4).intensity(128) # set intensity to half
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% Y# w! d# f( S% E: m9 u1 i' n内部开关请参阅 pyb.Switch. - from pyb import Switch; ^* }# C- Z: o0 |5 r: u
5 L% c4 Q* H* A6 S8 N* h: t+ S* H& d- sw = Switch()
9 G, D0 B8 j6 J" \ - sw.value() # returns True or False
! n6 B' @2 j( j6 d! F( n0 G1 G - sw.callback(lambda: pyb.LED(1).toggle())
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G, E+ C' m5 ]- C3 g- z/ ` Q引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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6 L1 |: I6 k7 z2 e- p_out = Pin('X1', Pin.OUT_PP)! H/ }' s- a+ I# L* N
- p_out.high()# Q e6 |' Z" p: y4 _) z; q& B
- p_out.low()" L, s1 G) }2 A
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
( B/ g8 m% Y( A# M - 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, `$ Z: Q; [0 r8 f1 K
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- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)' I* g$ X$ ~; }+ k) F9 B
- s1.angle(45) # move to 45 degrees" ] P, ]/ W- x% \3 e
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms1 I6 @0 Q8 r( P! u* v- x8 B
- s1.speed(50) # for continuous rotation servos
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! i+ Y2 L2 p0 w2 }8 Q8 t' T外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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; _8 f; Z; U- [" j, s- callback = lambda e: print("intr")
& X: o$ X5 C1 H# r - 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 Timer8 z( u& g8 z# |
, Q ?! x/ r! K! y- tim = Timer(1, freq=1000)
5 S8 a, t- ^8 t( O7 v. _( {) F3 n - tim.counter() # get counter value2 u% Q0 P" f( ~9 r; q" G9 k
- tim.freq(0.5) # 0.5 Hz
U- o' r$ U! K% `' L - tim.callback(lambda t: pyb.LED(1).toggle())
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- c: s Y: t3 }2 v5 {* LRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
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- rtc = RTC()
; m4 S' p( }2 K2 H) i h n - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time6 k: q9 U3 g. g: N6 u7 @2 S
- rtc.datetime() # get date and time
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+ w) U9 P- h7 s: R) fPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer
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. z/ K( A$ Q% M5 g8 z" z. J$ \- p = Pin('X1') # X1 has TIM2, CH1
/ B1 J6 |* R" q% }5 b8 ^$ X - tim = Timer(2, freq=1000)' e4 ^, o$ ?- R. ?7 H3 x3 S$ _9 I
- ch = tim.channel(1, Timer.PWM, pin=p): \9 J( J- p; K( h8 s( C; M2 b
- 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: }+ \/ x1 o1 H' [5 P1 w% B
' ~$ B; q9 @; O3 t; ~8 {8 k* O- adc = ADC(Pin('X19'))' ^3 Y! _& ~+ p
- 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, DAC2 J, ^& T3 Z% F5 y! Y& Z" W
/ Q) r1 T p* T4 W' x2 N; Z' w- dac = DAC(Pin('X5'))
* u0 l8 U; s" n - 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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9 @9 q* B& j$ r9 n4 k" U' s- uart = UART(1, 9600)
* E/ A/ e7 T/ K - uart.write('hello')
! h* O7 e; [8 Z6 @ - 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)
% y/ h3 R) s4 Q. ]3 z - spi.send('hello')1 q- T# R: h! q0 w7 k
- spi.recv(5) # receive 5 bytes on the bus9 y- m% t: l& q/ Y: \
- spi.send_recv('hello') # send and receive 5 bytes
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4 g+ R3 H I3 Q3 D( \4 g$ vI2C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, [" u$ _+ F7 |/ ^1 B
" X- H5 H$ P6 j, ?1 A5 P5 D% h; ?- i2c = I2C('X', freq=400000) # create hardware I2c object
( F+ _8 o3 x8 C+ k - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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7 }0 @& Z$ @6 h- i2c.scan() # returns list of slave addresses6 u3 ^4 J3 q/ Z' j& y% E! h
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
( ^3 {. P/ t$ i; m5 m. ~) N - i2c.readfrom(0x42, 5) # read 5 bytes from slave$ T) p- u% G' b. ~# ?$ m$ b
+ t' m" c3 M' ?0 m& `" _- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
1 T8 Z0 R: n3 u; Z! B - 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。 % X' l& E& ^! p$ s7 D
I2S总线参见 machine.I2S. - from machine import I2S, Pin
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; Y# z* A3 w. r2 _: u1 _- F- 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. j; q5 b# f& k8 V: h1 C
- i2s.write(buf) # write buffer of audio samples to I2S device
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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
# F- \. k2 `3 v9 p - 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。
+ o: m0 n0 R- Y/ ]2 ~CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN) P! o$ Z8 w* L/ e
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- can = CAN(1, CAN.LOOPBACK)
) u% u9 l+ P; B. a; o - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
2 ?9 Z8 ], R1 ?) R4 j! B% V - can.send('message!', 123) # send a message with id 1234 d$ u! y! c% Y. g( D
- 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()
8 E! Y/ g3 h- n5 j# M, X! `3 t - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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