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: ' Z/ r% K/ _( W3 w- j6 D
通用板控制见 pyb. - import pyb. A2 v0 `2 W6 D+ m
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)/ M: }2 B' M3 @+ |* g( d- z
- pyb.wfi() # pause CPU, waiting for interrupt
8 Z' h- I6 S9 j1 e - pyb.freq() # get CPU and bus frequencies
! M# h& \ b& n) ^+ l - pyb.freq(60000000) # set CPU freq to 60MHz5 I* a1 D, R: }# V4 Q7 z6 r
- pyb.stop() # stop CPU, waiting for external interrupt
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. w! ]7 L( a: M4 M延迟和计时使用 time模块: - import time
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- time.sleep(1) # sleep for 1 second
: E( B% A! x$ \' Z - time.sleep_ms(500) # sleep for 500 milliseconds' K2 p) H1 F* |0 B5 J3 I/ ~0 l6 j: H
- time.sleep_us(10) # sleep for 10 microseconds
6 Y: n" T0 z4 |9 z! a) G5 W4 m - start = time.ticks_ms() # get value of millisecond counter" ^& F. E) F2 H* m! X# E% F- Q
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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! Q! z! [! A$ B内部 LED见 pyb.LED. - from pyb import LED2 c" A* ?" J/ f2 I3 w. g! }
% {6 ?+ C% S0 z% x+ _% J6 M- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
6 h$ w' X$ ?" I+ m - led.toggle()
- B5 r! N1 `- b$ `1 N: S - led.on()) t0 \% u& k# T' u& {8 O* j
- led.off()
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$ `* X' |' m' I; ^4 R- # LEDs 3 and 4 support PWM intensity (0-255); `5 N9 }* \5 I1 z/ A, k4 {# V7 T/ X
- LED(4).intensity() # get intensity
- ~/ B" R, w5 y - LED(4).intensity(128) # set intensity to half
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4 K( w9 w8 ~5 D! i6 }内部开关请参阅 pyb.Switch. - from pyb import Switch( I5 u& k8 a$ T6 v
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- sw = Switch()
S7 z& e' r5 C - sw.value() # returns True or False# e- M# o s ~% {0 E
- sw.callback(lambda: pyb.LED(1).toggle())
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* r0 f \* A6 N引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
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# x3 D, C# K& t& W1 t3 D- p_out = Pin('X1', Pin.OUT_PP)0 j4 Y; w5 X/ W
- p_out.high()
U5 e- z" c$ w0 d# l" { - p_out.low()
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4 z2 M4 C. {( w' M9 U3 T- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)* o* Y# m5 F4 p& e' I" S: w
- p_in.value() # get value, 0 or 1
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4 {& h2 L8 J; B7 r( i6 l伺服控制请参阅pyb.Servo. - from pyb import Servo
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% c! B- B$ j* e; r3 o1 h- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
% ^( U0 L* y, c3 f% G - s1.angle(45) # move to 45 degrees
! g/ R# ]9 D- G) g - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
) ~' Y* F9 z. A - 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% a7 b) r) z2 ?' b
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- callback = lambda e: print("intr")
, Y% R" l. q9 Z. G7 Z6 G! J' z8 [ - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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4 D# ~& s: Z! f计时器请参阅pyb.Timer. - from pyb import Timer
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" P+ Q4 l2 p0 K% l( v5 g4 [0 M- tim = Timer(1, freq=1000)1 N3 c9 {; F3 j1 S
- tim.counter() # get counter value, [% m9 g( Y; O8 [9 a! i. ^
- tim.freq(0.5) # 0.5 Hz. i [/ b5 Q$ c8 D
- tim.callback(lambda t: pyb.LED(1).toggle())
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& r+ c/ {7 k5 Y9 h7 `% [; ~! ?2 b; wRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC, j4 V! R: t5 ]8 N4 Q" l9 N7 F
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- rtc = RTC()
1 G, _+ j: A. r) O# R - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time1 u+ x- U2 p u7 g
- rtc.datetime() # get date and time
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7 z4 r$ s$ o" g7 h( s9 d& EPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer
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2 l) g8 c- A( N9 M- p = Pin('X1') # X1 has TIM2, CH1
' }: E" _& @1 o6 K - tim = Timer(2, freq=1000)
6 N6 u3 C2 ]' v- O& { - ch = tim.channel(1, Timer.PWM, pin=p)
' v6 }2 E: Y: s% h( ?7 { - ch.pulse_width_percent(50)
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5 s8 h2 Q. d' i; j5 d& LADC(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'))4 m5 l, n& d3 g2 F9 L8 i" y
- 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'))
$ ?' z6 P! d# ~. U7 f _% Q& h f - 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 UART0 Y) D4 w6 u) y w$ Z: o
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- uart = UART(1, 9600)+ \( K! l5 |$ u# g
- uart.write('hello')
" `9 o1 P2 r& X% ^" P5 o- X - uart.read(5) # read up to 5 bytes
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) n6 X; C4 M C# U1 f' z" eSPI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)- W8 W8 b7 v* Q
- spi.send('hello')
: w5 f$ A9 P; ?( Z+ q6 [ - spi.recv(5) # receive 5 bytes on the bus
# U/ B" f5 B) w% C, k- b - spi.send_recv('hello') # send and receive 5 bytes
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( |6 w# E& |$ b3 @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& j$ A: u% B) ~( \: m1 |
; N3 u' n& H* I# E" y' i* o- i2c = I2C('X', freq=400000) # create hardware I2c object
1 x6 B5 i W0 @5 j! Y2 R - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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4 L$ G& _3 @! j; p+ |6 \2 R d- i2c.scan() # returns list of slave addresses0 C* k% ~ Z n) X: C7 @. R; j9 m
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42( @# n0 c- m- y: X2 V% J
- i2c.readfrom(0x42, 5) # read 5 bytes from slave
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$ S) e# n% `, @! p+ x. Y4 I- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
( u2 R3 K' L8 _, e - i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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6 I! x5 r! B2 ?注意:对于传统 I2C 支持,请参阅 pyb.I2C。
! Q+ I$ e5 }# H- N5 Z$ II2S总线参见 machine.I2S. - from machine import I2S, Pin6 o6 W* `. ~1 E( I m
* a" w& ~8 I3 t8 y- c, N7 K- 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
; |. _& P+ E9 g0 i7 [ - i2s.write(buf) # write buffer of audio samples to I2S device/ \/ Y! `$ ^) z6 G1 t( E/ N3 a0 f( V
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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 object6 g' }9 L% W, ?+ c+ N% [
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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& T, ^$ e2 c4 Y& WI2S 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。
6 _1 u& q# i0 B7 g5 }2 ~CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN1 H" |& i1 P+ n; S3 E, y
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- can = CAN(1, CAN.LOOPBACK)& d& n5 k& N$ N! N. P
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))' ?' h6 \7 x, I6 r. z5 L
- can.send('message!', 123) # send a message with id 1233 L- R% N# y1 b4 {
- can.recv(0) # receive message on FIFO 0
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: F, R* K8 J' b6 l内部加速度计参见pyb.Accel. - from pyb import Accel
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- accel = Accel()
9 c4 J+ S& [* q& c - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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