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' h3 G. Q: \# b* ?# k通用板控制见 pyb. - import pyb1 W. G! @8 }- U1 b' t% |
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
+ Q1 w2 ?9 O+ E# Q- n - pyb.wfi() # pause CPU, waiting for interrupt
+ E/ D$ K- X3 n1 O& c - pyb.freq() # get CPU and bus frequencies' C* |; U& x! N/ C& K" a2 c
- pyb.freq(60000000) # set CPU freq to 60MHz
! u; L F- z& k( H# r$ L: j4 g& \ - pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time4 [ g/ o8 {( m( |4 P
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- time.sleep(1) # sleep for 1 second
- N; e. V4 j2 R$ T( c/ s - time.sleep_ms(500) # sleep for 500 milliseconds+ o" ~6 R5 T- j3 H, J
- time.sleep_us(10) # sleep for 10 microseconds @# l0 E. \0 G& `: V
- start = time.ticks_ms() # get value of millisecond counter, k' s& V; v0 }! X, l
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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& R$ ?( s* ~+ u$ v Y# b+ ?/ f内部 LED见 pyb.LED. - from pyb import LED1 t1 p/ v1 C a! H3 k/ h
5 X; T# `6 ~1 [. r: G" S# T+ ] L- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
: h7 o4 ^: U) ]+ T6 @. V. z- W: ^ - led.toggle(), R- J5 z- D. o' H: c* {7 P# J
- led.on()
2 H& [/ l( T5 m) @) `! _& P- o5 S - led.off()& A; q6 q6 u; \& Q. y
* X1 }, l }4 n- # LEDs 3 and 4 support PWM intensity (0-255)$ M: }/ M5 a; K5 u9 F
- LED(4).intensity() # get intensity
& V5 a9 v/ m# E' {, C - LED(4).intensity(128) # set intensity to half
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% J3 d# ^) K( U7 w& a% S3 d5 g内部开关请参阅 pyb.Switch. - from pyb import Switch5 o3 ]0 o& }4 M
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- sw = Switch()( F4 E: I; ^ [" j) B4 V
- sw.value() # returns True or False. Q/ }0 X5 p) l& k+ s
- sw.callback(lambda: pyb.LED(1).toggle())
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) X: H# M1 Q0 ]) G/ z引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin3 N: P$ K2 w4 @, ?: Z2 ?
2 z0 Q; `* i$ Z7 Q6 ~5 m; h- p_out = Pin('X1', Pin.OUT_PP)2 M: G5 J/ u. R/ {
- p_out.high()
8 y. V+ u. V$ {; S - p_out.low()
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6 a5 A' ~' f, Z5 F! H* k7 U- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)9 ?9 ?$ _; c0 R# t! G+ b- P3 c _
- p_in.value() # get value, 0 or 1
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, C6 |. i, e$ y2 W伺服控制请参阅pyb.Servo. - from pyb import Servo1 A/ E' \' p0 R7 E1 S7 j9 e2 B* \
2 i; [+ K- x' x# y+ N- d" Y- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)' J2 t% B& x. {
- s1.angle(45) # move to 45 degrees
9 W% h- r: @ f" {8 A/ z: e - s1.angle(-60, 1500) # move to -60 degrees in 1500ms: e. Z5 b$ o( h& @
- s1.speed(50) # for continuous rotation servos
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外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt2 F4 c7 V( V, y+ X6 b' |* P
: I4 E8 t t" L5 N- P. [- callback = lambda e: print("intr"); m9 g6 K; v7 P) C' ~, f4 B
- 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 Timer2 l& u" `' V: E u, a! Z8 i" F8 a
' h1 w* o2 k* l0 s9 T4 k3 }( a8 w& C) Y- tim = Timer(1, freq=1000)
) l; X; a0 J* Q# k, K - tim.counter() # get counter value
- e' J, G7 E5 `7 i e/ Q6 B2 { - tim.freq(0.5) # 0.5 Hz% H# L* E. r9 G- r. K6 e9 [$ _6 i
- tim.callback(lambda t: pyb.LED(1).toggle())
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$ M. u& Q2 T j8 ^3 _) H% `RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
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8 b- }6 L& o5 x" R" l- rtc = RTC()
2 g. l$ ? g. p$ ~3 k# I0 J - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time& u0 p+ i* v4 ^
- 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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# |' D# ~% w2 \4 v5 V6 M- p = Pin('X1') # X1 has TIM2, CH1* n" z/ l4 j6 ^) U2 q. _( j
- tim = Timer(2, freq=1000)
9 o, N* d2 V, A6 D) c3 o3 F! U2 N4 I - ch = tim.channel(1, Timer.PWM, pin=p)
1 t4 i8 p- B' F# P) Q- R/ V0 X - 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'))
: k' F/ U0 V" O7 j! i* L - adc.read() # read value, 0-4095
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- p$ y$ R3 M( e7 ^' z3 hDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC! f9 E* z% k9 P L, u
( g# Z0 R: M U; p/ e" R6 D/ j- dac = DAC(Pin('X5'))
: L8 C/ k: ?; ?0 T Z - 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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1 l4 i2 Y0 \' Y$ a- uart = UART(1, 9600)
" b# x* v9 w* g9 N. o - uart.write('hello')7 s: _& m/ F' S3 a% K
- uart.read(5) # read up to 5 bytes
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% h5 k, w/ S9 sSPI总线请参阅 pyb.SPI. - from pyb import SPI' X* X+ E; F r1 r9 p
' K* q0 r; `! O5 r Q, U1 o' ^- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
& `! J, R4 {' [9 T a4 A - spi.send('hello')
/ z! F$ n1 Z: y: k6 b - spi.recv(5) # receive 5 bytes on the bus% i& T& D- c+ v) q7 `* \; Q
- spi.send_recv('hello') # send and receive 5 bytes
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2 G+ [# w7 h# f, U# cI2C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
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- i2c = I2C('X', freq=400000) # create hardware I2c object
1 K, j/ @7 I- t. F. h4 N* R - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object* N5 A+ V# q, d* v5 F3 [
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- i2c.scan() # returns list of slave addresses$ W* ~; B0 A/ ^; m9 t+ M
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
, V. Y& u# U" C0 X7 R* U - i2c.readfrom(0x42, 5) # read 5 bytes from slave
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( d' s3 T3 ?3 T4 b- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x106 h5 m, B# X9 N, N
- 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。 ; @3 o; c* @4 p8 X' H. n
I2S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
- f' I5 `/ ^- z7 `0 w1 t; E! | - 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& {) o* x2 D" H: ]. _
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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0 T1 u; }3 ]& \4 iI2S 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。
2 d( K) x% V. \8 L& o |2 c1 HCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN: e- q" D" n5 x3 f' V- u; h* {: ^
- l. a9 Z, }7 y, X5 u: `- can = CAN(1, CAN.LOOPBACK)
, G/ n8 a* j! ~- G7 x - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))' t# H: h& {: m4 G" p! P9 W9 Y" A! c
- can.send('message!', 123) # send a message with id 123
; _% p# ^4 m( S - can.recv(0) # receive message on FIFO 0
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) T9 M$ Y; M: \内部加速度计参见pyb.Accel. - from pyb import Accel
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, h3 ^8 T: p, d4 O7 m- accel = Accel()
5 s) @, Y# h0 Q - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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