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: 4 L m' Z* e: q: D [. A
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)
. Q7 B* G, u5 C2 L T" x - pyb.wfi() # pause CPU, waiting for interrupt& X9 Q; W( b9 ?7 c
- pyb.freq() # get CPU and bus frequencies: S8 g: i9 p, Z" P4 c- l: `
- pyb.freq(60000000) # set CPU freq to 60MHz
* x; x4 V+ n1 z5 I9 ? - pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time0 [* a3 p" D7 p; Z8 Q
' p( g0 ^& B8 e- A- time.sleep(1) # sleep for 1 second3 N. Q! W" K* u0 L. ]
- time.sleep_ms(500) # sleep for 500 milliseconds
0 X: @: u! V( J1 R - time.sleep_us(10) # sleep for 10 microseconds
: X# K2 z( d0 w* O4 Y - start = time.ticks_ms() # get value of millisecond counter
0 s4 f1 N0 f Z; ^7 H - 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" w. G7 L W, j2 W6 N# [- r+ a
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue3 d- B' J) M6 `4 o2 E
- led.toggle()
) v! g0 N- v7 a. x7 U; X* N - led.on()4 M8 b! W' `0 s$ B, |5 ]
- led.off()
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0 O) [1 E/ n+ P& M* N- # LEDs 3 and 4 support PWM intensity (0-255)
& H: w6 F' R) a) P' V - LED(4).intensity() # get intensity
# J: l5 k' l5 Q0 v8 ? w* G - LED(4).intensity(128) # set intensity to half
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* ]2 v' @* g) n4 j+ j! ~内部开关请参阅 pyb.Switch. - from pyb import Switch
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- sw = Switch() `1 @' K7 d9 z4 ~. n; {3 H
- sw.value() # returns True or False% B# [& s3 r; h j u! n; ?
- sw.callback(lambda: pyb.LED(1).toggle())
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引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin' R; H S: F; \! `4 t- T
- M4 W* [4 V6 H' d5 h2 [( y1 m- p_out = Pin('X1', Pin.OUT_PP)
% e7 k1 \3 m! c& h3 q - p_out.high()
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)8 r" ?& y* h! i# J8 a! 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
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1 y+ H- {- ~3 i+ j0 w; s8 O+ C* [( @- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
+ a) g( f1 u: B) J% n% t - s1.angle(45) # move to 45 degrees6 N0 }' S6 D/ h, K; Q+ l
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
- M% `6 c, B. G9 O) W6 u! Z - s1.speed(50) # for continuous rotation servos
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* T6 A5 _1 Q. V- M5 O外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt5 o# G& Q2 b) E) c: r
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- callback = lambda e: print("intr")
. q" F" i. o& [ - 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; h% T1 j# C$ e5 y
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- tim = Timer(1, freq=1000)* O4 \7 S m. l$ e
- tim.counter() # get counter value
$ ~% w1 T) o X, P - tim.freq(0.5) # 0.5 Hz
6 u& a9 u' G3 l N - 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% Z% A8 n5 T$ U, \) W/ F
- j2 L( v2 `. [ I# O0 v- rtc = RTC()& k3 Q1 a8 C: s1 K" `/ o, i
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
% S6 S7 ^* h0 m0 r! F7 q0 P2 g - rtc.datetime() # get date and time
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2 ?. M- @& ^% s% f0 l( {PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer/ f- x, ~; V f2 B) {& e
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- p = Pin('X1') # X1 has TIM2, CH1( t2 C' \& D/ D3 ?
- tim = Timer(2, freq=1000)
: o7 Q$ `) k! `! a4 ~ - ch = tim.channel(1, Timer.PWM, pin=p)
$ q2 C7 a( d% S/ v - 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')) s8 X! L5 s' F2 @$ t, C0 v2 y2 W1 R& N
- adc.read() # read value, 0-4095
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* i7 G* c; b MDAC(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'))& X; V- }# r8 @, `" ^6 M7 k
- dac.write(120) # output between 0 and 255
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8 q" f _& o' z& \( s$ OUART(串行总线)请参阅 pyb.UART. - from pyb import UART
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- uart = UART(1, 9600)2 I! ?0 V- F1 p) g. O+ V
- uart.write('hello')
R- e$ V; F. A! j: X* V - uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI5 \4 W9 C+ i/ A" Z! X% n6 q9 A; l: r
: ]5 i% o2 K3 ]6 S( v9 ^6 I4 m9 W1 I- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
( J; t% u0 q A! b( ~4 A( P - spi.send('hello')
# s. \2 q( R7 T# p- z. {: ~ - spi.recv(5) # receive 5 bytes on the bus
7 M# g; c3 u" ^4 Q' D- t7 Z3 Y5 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 m9 ^6 l N( P+ G
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- i2c = I2C('X', freq=400000) # create hardware I2c object: L* F* v1 f* I# o9 R9 Q: h
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object* n5 k! L" D0 d4 U ^$ p3 M. Q: g8 d5 h8 O
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- i2c.scan() # returns list of slave addresses
3 X: X; U7 {: J& ~& r5 K& A- t( _ - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
7 d$ I$ R/ P: D4 N! E3 Q! P- g - i2c.readfrom(0x42, 5) # read 5 bytes from slave: [2 U* e& T/ C" Q4 W
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- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x100 K/ u: G7 h! I4 j$ G
- i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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9 l I! y9 ]8 Z注意:对于传统 I2C 支持,请参阅 pyb.I2C。 8 T" `: @. n) m" {- Y4 W' o" `
I2S总线参见 machine.I2S. - from machine import I2S, Pin4 v0 Q0 P( \/ a' x% d7 b: t) g
6 K7 g$ i( O8 [; ?- 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
7 @1 s% S5 y( }; g" j5 ^4 k - i2s.write(buf) # write buffer of audio samples to I2S device
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: v7 q$ E' ]' b0 G/ r5 ^: P- 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
9 a* I4 }4 B' X* q - 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。
. ?3 I1 y" \0 |5 ^, yCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN5 N2 x5 `- ^' m- w0 C
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- can = CAN(1, CAN.LOOPBACK)5 k8 Y4 N5 w# a4 U9 W* X) C
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))% n) {- W6 V5 ~, x* ]% ~
- can.send('message!', 123) # send a message with id 123$ m7 o3 ~2 p" s( h' q; r9 b' S2 ?2 [
- 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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) L/ V! k" ~$ ^# J- accel = Accel()
. h! |- P+ H# Y7 ?8 | - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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