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: , O" A) H/ g& ^
通用板控制见 pyb. - import pyb
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# V' O: d$ V, N; E4 L" Y- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)- T( o1 Y; n) b+ D# }* d" }6 F
- pyb.wfi() # pause CPU, waiting for interrupt! w3 r, s3 i; Y+ g$ V' R8 S/ R3 c
- pyb.freq() # get CPU and bus frequencies1 s- l7 @( K# D0 t$ e- b
- pyb.freq(60000000) # set CPU freq to 60MHz9 K- ~: j0 {+ h/ v
- pyb.stop() # stop CPU, waiting for external interrupt
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7 k, \9 P" q4 b- y( h c9 U延迟和计时使用 time模块: - import time
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- time.sleep(1) # sleep for 1 second) B9 Z$ q; o" ?
- time.sleep_ms(500) # sleep for 500 milliseconds
* t/ @# L8 ?/ I1 l9 r - time.sleep_us(10) # sleep for 10 microseconds
0 k3 k' d: Y: T$ E+ x - start = time.ticks_ms() # get value of millisecond counter, J! p8 v9 L# X3 _" S* S1 C8 I
- 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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0 a8 A& \0 c1 ]/ D- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
* `; R" n+ h! I8 m* C - led.toggle()
9 W7 z9 U3 j0 C5 \, U - led.on()
% n; R% x; A1 v: f2 S8 X' g) W - led.off()
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0 S) o8 s3 a: S# p" I% s G- # LEDs 3 and 4 support PWM intensity (0-255)
7 H5 [+ G+ z6 H4 L- G - LED(4).intensity() # get intensity5 Z. V! L) ? K: p e
- LED(4).intensity(128) # set intensity to half
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( p) B1 ~$ z6 j8 e4 n内部开关请参阅 pyb.Switch. - from pyb import Switch6 |5 ~8 q+ d, L2 Y: m
7 N* t. B( a% \- sw = Switch()
! ]. W" y; O) r# n$ P - sw.value() # returns True or False
, v$ [" b, ~' P - sw.callback(lambda: pyb.LED(1).toggle())
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" o9 [5 @9 o5 P) {引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin J0 c! J4 s# v8 A) Q
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- p_out = Pin('X1', Pin.OUT_PP)) I5 Y8 \7 U+ x6 v3 C8 R
- p_out.high()
`2 G1 x! y2 f' w- M* Y - p_out.low()
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
- S2 \0 \ N. s1 b" T, Z - p_in.value() # get value, 0 or 1
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# [ X: a M, b伺服控制请参阅pyb.Servo. - from pyb import Servo
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- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
3 u9 [8 y5 g: {7 i. [$ b3 l" V! R$ I - s1.angle(45) # move to 45 degrees
$ o/ s9 C2 n4 c& X1 [ - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
; _0 E- h+ v% C - 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( r- L( O) i& y5 [
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- callback = lambda e: print("intr")
, S3 w& r; H. v+ E - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
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0 B1 }( _2 q- C5 [, i! ?. U/ ]计时器请参阅pyb.Timer. - from pyb import Timer+ i3 {6 G; S3 |6 c9 @2 ~1 _+ c
7 f! R+ N' }+ C" D2 j9 Y+ {: p1 q- tim = Timer(1, freq=1000)* C2 y1 A) D7 m' Q
- tim.counter() # get counter value
: {2 L& P% V1 _: s9 F' p - tim.freq(0.5) # 0.5 Hz2 X" T, C* k3 ]; ]
- tim.callback(lambda t: pyb.LED(1).toggle())
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+ }0 y2 N% r( v! m0 @% N: }& H' [RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC, F# S) s# R5 U4 j" t$ R+ `6 H; P) s0 [
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- rtc = RTC()& k& h2 x: v& g9 C3 j
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time V* f9 M$ k+ p' H4 z, Z# W
- rtc.datetime() # get date and time
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+ v, z |% z" j* q; PPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer$ P8 h: o( E. |' X$ L0 G
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- p = Pin('X1') # X1 has TIM2, CH15 H# u8 j6 c6 n* ]5 G
- tim = Timer(2, freq=1000)) A; p9 V9 H5 k9 ]4 ~# a
- ch = tim.channel(1, Timer.PWM, pin=p)6 q% x; N1 @: J: l3 t
- 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'))# A% }, k2 D/ x l% m$ X. @ W" @
- adc.read() # read value, 0-4095
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$ R2 q% E c2 K" b7 S2 NDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC4 K* ?2 |0 C. }$ U$ X6 @% `
% a- k) q; i7 k5 l" P* m- dac = DAC(Pin('X5'))+ R. h, y& U& n4 ~9 G5 [
- 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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- uart = UART(1, 9600)) ?. n. p" E8 `( W( ]
- uart.write('hello')0 ?( K0 [3 u- z
- uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI$ G/ N7 L9 @! r, c& T
. A) M( f: x* N- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
6 k+ @6 [1 y, v+ N! I x& F- @, q - spi.send('hello')9 b" K9 e# F( ^4 b6 a) G; T4 b
- spi.recv(5) # receive 5 bytes on the bus6 r# c) t) U: f$ z% \, Z/ d& H
- spi.send_recv('hello') # send and receive 5 bytes
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C! V+ I( {' M( r8 [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 O, F) H. c% c" I0 G% q
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- i2c = I2C('X', freq=400000) # create hardware I2c object
* [7 h8 m2 G1 h( }, h3 x! {$ _ - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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7 y/ X+ E0 u1 e% |9 a7 Y- i2c.scan() # returns list of slave addresses, x4 b; X% C. `+ B2 y% k8 I
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
3 M, f8 @6 R+ @" T. }4 P" L - i2c.readfrom(0x42, 5) # read 5 bytes from slave* e/ T7 R: z6 t; F
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x104 `, W3 Y& I. m! J6 u+ x
- 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。
( S: L3 Z( L& [3 z$ f+ PI2S总线参见 machine.I2S. - from machine import I2S, Pin
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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
) x; u) T' o5 j1 ~) z8 V - 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
# v# Z, t% p# ?7 v v - i2s.readinto(buf) # fill buffer with audio samples from I2S device
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, h' ?; y9 }) X. rI2S 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。 5 L8 n" I2 {6 x4 O: M
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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- can = CAN(1, CAN.LOOPBACK)) T4 x/ n G; O" p. b
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
; x) b# e9 t- Q% Z L) L9 t - can.send('message!', 123) # send a message with id 1237 E- ~8 c5 A3 T; ^2 k* J* l
- 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' P4 g1 S4 [9 d
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- accel = Accel()
$ P- i7 P+ f: d7 m3 s; m$ b - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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