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:
2 c8 e! d- v$ a8 I2 F5 l2 u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 V7 c) K$ w+ Y) b, i: u - pyb.wfi() # pause CPU, waiting for interrupt2 e1 ?5 e5 w$ v. B0 j# b c
- pyb.freq() # get CPU and bus frequencies" ]& u8 K. z2 l
- pyb.freq(60000000) # set CPU freq to 60MHz
$ g3 m/ [: k! A6 p( h6 v - pyb.stop() # stop CPU, waiting for external interrupt
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, J& H: _9 C2 ?& Z7 `' ~7 C延迟和计时使用 time模块: - import time
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- time.sleep(1) # sleep for 1 second
$ D' a$ P N n4 x" M9 r - time.sleep_ms(500) # sleep for 500 milliseconds
# D u) W+ j/ F0 z u# r7 m$ Y2 {2 k - time.sleep_us(10) # sleep for 10 microseconds% ~8 B4 F, o7 u- n6 h5 j: Q! s1 O
- start = time.ticks_ms() # get value of millisecond counter
6 p; K u/ l) F) G% R" i - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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4 d4 D3 `* J# Q1 K内部 LED见 pyb.LED. - from pyb import LED
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue1 i5 M7 ~' L* p+ e# P8 l
- led.toggle()
8 G! c! c: A! ?2 J2 c3 f0 B - led.on()$ {# O f$ q' ~
- led.off()% T$ e1 |' W% \1 Y
0 K' u& ?& H* z+ I v' A. B2 a- # LEDs 3 and 4 support PWM intensity (0-255)
& s" N" s) n) N - LED(4).intensity() # get intensity
9 T( z: J. x, ]# k - LED(4).intensity(128) # set intensity to half
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, X; g' r+ y4 b, i内部开关请参阅 pyb.Switch. - from pyb import Switch6 l/ ~, F7 T8 z' v, J% _( D
9 r8 @; j0 h$ T7 V7 }# j+ t- sw = Switch()
3 I, s5 C+ B% E+ K, n- `4 M4 T - sw.value() # returns True or False
6 q* @- i0 p: H' X& i - sw.callback(lambda: pyb.LED(1).toggle())
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$ y8 r3 e: p/ U. r7 l8 K2 f引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin' ^) P; l+ b9 v9 x
) E5 W% E* n0 h1 v- p_out = Pin('X1', Pin.OUT_PP)
" d( a% s9 c: B- y - p_out.high()
5 W; \) i3 G, ~+ O- W- ~- Z) j - p_out.low()
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* T' }" V4 M2 z- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)+ G6 \- J% [: C! {# P4 a1 V( {% I" r
- p_in.value() # get value, 0 or 1
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伺服控制请参阅pyb.Servo. - from pyb import Servo5 H. K2 b: f; R0 C9 W. h4 P
+ F3 S2 T% c) Z5 u1 P0 Y- s1 = Servo(1) # servo on position 1 (X1, VIN, GND), d% y& p! E6 R
- s1.angle(45) # move to 45 degrees& V' d- R0 H/ s$ E
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
+ C+ Q% v' I, ]6 E/ d: o8 | - 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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- callback = lambda e: print("intr")
1 O' Z% D1 S! h - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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' _3 c! p0 C- ^* w, p% m6 r计时器请参阅pyb.Timer. - from pyb import Timer& |( s* W1 l6 ]* Z: |( f, H
4 Z8 T; E3 X C3 Y! |" m- tim = Timer(1, freq=1000)
& V5 J3 U: w8 W - tim.counter() # get counter value
/ I$ L* e: ?; U; G- Q! y8 D - tim.freq(0.5) # 0.5 Hz, w8 o4 t& t$ ?. s) a! ^+ z
- 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. h+ I/ X0 T% m8 B
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- rtc = RTC()
8 H4 h* N+ A6 d - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
# ?/ v$ `! k" G8 { - 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
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- p = Pin('X1') # X1 has TIM2, CH1
/ n% t4 }2 u& o& J* d4 S - tim = Timer(2, freq=1000)5 i. c5 N0 g3 i0 k/ |6 v( U: |. c
- ch = tim.channel(1, Timer.PWM, pin=p)
5 x. ^+ B( D7 B& \+ Y7 a - 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'))' W" F9 j% v1 r4 O% v1 N
- adc.read() # read value, 0-4095
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' h+ c! {" ^2 h: w7 ADAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
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3 u- ?: [& B6 S% Y- `- dac = DAC(Pin('X5'))
8 P$ d/ J y- a - dac.write(120) # output between 0 and 255
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2 p1 s+ t# ?/ ~UART(串行总线)请参阅 pyb.UART. - from pyb import UART8 R% m) O+ e. X Z) w) U6 N% d# D
) d0 p2 f2 l7 q1 l$ K6 ^- uart = UART(1, 9600)
+ y7 Y" m. ?/ T" P1 q - uart.write('hello')* n$ x) G' n- e9 ^/ W% P: g3 z
- uart.read(5) # read up to 5 bytes
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( \/ P5 n( b. J8 x9 b+ i7 S3 ASPI总线请参阅 pyb.SPI. - from pyb import SPI) y: r0 g- A6 o
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- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)4 G; {# Q! M* f! B
- spi.send('hello')
, ~% i; d4 [# O$ q/ U - spi.recv(5) # receive 5 bytes on the bus
2 o: y( @, q8 ]3 m - spi.send_recv('hello') # send and receive 5 bytes
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# X7 d- C3 l5 v) B4 HI2C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# c! m3 H9 o3 \
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- i2c = I2C('X', freq=400000) # create hardware I2c object
# O" ^; o) t4 ?# O7 J - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object8 E' r2 A! P4 b( A3 \4 G" p& t
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- i2c.scan() # returns list of slave addresses" k3 r V. m! ~$ l; G7 c; e
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
5 X3 N+ z- M* ^2 w - i2c.readfrom(0x42, 5) # read 5 bytes from slave) k6 G- Y1 O; }9 I
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
/ o7 B. c( j+ H, B! F5 G. Z - 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。
( J* K6 R: r+ [, d; X" _- JI2S总线参见 machine.I2S. - from machine import I2S, Pin
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: D. n' u7 u E- 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
8 k. g r. T" t/ S8 K- X" y% h% U0 ^ - i2s.write(buf) # write buffer of audio samples to I2S device
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, m* T- Y" [ c5 p$ d) O0 C! Z* 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 object5 x- g3 U) Z, r6 k. D: |
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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2 A% q8 t' Z- @9 ]/ ?0 fI2S 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# F8 n5 T5 m. `* v; O
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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! b9 I( G! K* C ~/ D- can = CAN(1, CAN.LOOPBACK)6 y8 m- b! P' M5 e' u5 |
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
/ G; H% f4 `: S2 ~5 Q& y6 [1 b. h" n - can.send('message!', 123) # send a message with id 123
1 _; r/ L0 K7 z8 s. V. H - can.recv(0) # receive message on FIFO 0
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- a# S2 z: J: I9 j( ]( t) }内部加速度计参见pyb.Accel. - from pyb import Accel1 z) z$ P4 W Q: ^/ N
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- accel = Accel()# u# z+ y9 S' f& t; j M9 Y
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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