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: / g3 P4 m) `* m: |) V+ h5 d
通用板控制见 pyb. - import pyb
, y) s! n% E: y. r* y z+ H - & U4 n0 r2 m! h0 V% x" w8 Y" L1 }+ n
- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1); h; G+ V `9 c+ x
- pyb.wfi() # pause CPU, waiting for interrupt( N$ q5 ~1 U! F& B% G
- pyb.freq() # get CPU and bus frequencies
" y, z. Q3 k! f - pyb.freq(60000000) # set CPU freq to 60MHz j6 H: ?1 N9 N5 a) r4 q
- pyb.stop() # stop CPU, waiting for external interrupt
复制代码 / f# s3 t: T4 X( g: a+ f
5 X7 ]0 ?; k6 t% I1 ?
延迟和计时使用 time模块: - import time
' W q+ L$ f2 u - % p5 i* q& ~; N7 P X
- time.sleep(1) # sleep for 1 second
- p G) |6 k; p9 `8 E/ N - time.sleep_ms(500) # sleep for 500 milliseconds
& L; h" ~- z. }) d - time.sleep_us(10) # sleep for 10 microseconds _' A# L5 E% v
- start = time.ticks_ms() # get value of millisecond counter
% e) _' `& @8 U4 `% i - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
复制代码
7 P/ f/ X: B" @* D' r2 r6 O
3 ~0 h. i4 l5 w: G. ]' ^6 h5 |+ k: P内部 LED见 pyb.LED. - from pyb import LED/ y' |( b/ P( @$ p7 T. V
$ K0 `: w' t& w5 r2 p. d: n1 q, H( h- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
- P6 x& _3 B! R8 ?2 {& `7 ] - led.toggle()
7 U; N2 w; ~) V4 E6 U4 p6 I3 J - led.on()' {4 a- s' B( \: R
- led.off()/ g- e G5 J4 I9 ~1 Z/ A' o
- ( J" ^: l1 I: a. U5 e, M8 t/ O
- # LEDs 3 and 4 support PWM intensity (0-255)
& W- H! D, c9 r/ [ - LED(4).intensity() # get intensity
) t2 T3 p- V. B! |+ Y. M& C+ f - LED(4).intensity(128) # set intensity to half
复制代码 ) m; U' e8 n* L' O
7 `& Y0 M. P, e: j8 s
内部开关请参阅 pyb.Switch. - from pyb import Switch
, f* `) ~9 [$ Y& A3 t) ^
" o4 P, r0 U) q L- [- sw = Switch()
}3 ~5 R1 z3 ` q! ?5 L - sw.value() # returns True or False
9 s0 V% ]$ \" V6 _ - sw.callback(lambda: pyb.LED(1).toggle())
复制代码 : g% R+ Y: ?3 Q% g
! E: R- Y: Z6 ^* N- C+ X( d引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
$ Q1 y6 v7 A! @+ Z, |6 X - ! z, g: L# l+ D& }, }2 G# D, S7 L
- p_out = Pin('X1', Pin.OUT_PP)8 r- J3 B3 S# V/ S# U/ S1 x7 n
- p_out.high()
0 c' H. X0 r$ P/ X0 ^1 L9 }6 N% U - p_out.low()
: _9 [+ `! i( [- u8 i/ @- H' E
2 I7 t) R! {8 J8 ^% b- @- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)8 L h% K6 _: H! L: s! u
- p_in.value() # get value, 0 or 1
复制代码 . ]9 _2 g; W* O8 h. l
+ C2 Y$ y+ p) \) v T# r' e
伺服控制请参阅pyb.Servo. - from pyb import Servo" i3 B' r: i1 w4 }& P3 [3 ?5 i
- ( O/ T1 m; q% w* `
- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
6 z3 W2 S) _$ y( R$ Z* x" i - s1.angle(45) # move to 45 degrees( S1 K4 T" n/ M2 h: }& ]
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
; l8 U3 H$ U; J - s1.speed(50) # for continuous rotation servos
复制代码
: X' E. G4 e, n# h6 C6 a) y
! o5 u! R/ \# }" E外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt! B9 C' G- M5 [" N: f% g
- 3 F Y" x/ e& H# h6 k* ]1 s
- callback = lambda e: print("intr")
0 e( A$ x7 z) W - ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
复制代码 2 Z( _9 d* v; R! ~9 ]* t; N
- B5 F9 h1 `- `2 m计时器请参阅pyb.Timer. - from pyb import Timer
0 P6 Q+ U. s! k) _: m! t
/ [1 N# k6 A. _' R8 u; N- tim = Timer(1, freq=1000)
8 C! N9 F7 ^; T - tim.counter() # get counter value
9 ~9 ?: Z) @) A - tim.freq(0.5) # 0.5 Hz
% L+ e* V7 V- e. ^* r - tim.callback(lambda t: pyb.LED(1).toggle())
复制代码 4 X9 b( _! {9 T$ v7 A. p
RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
2 \2 M/ }0 ?4 ^+ B& Z - 3 \ a; i" F$ B% Y* n% V7 z3 }
- rtc = RTC()& B. z9 k _4 f
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
2 n/ d7 C' R, i" ], i - rtc.datetime() # get date and time
复制代码
# }: g# J, d7 m" W/ x5 }PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer' r N( i! [& E3 k1 p8 ?, ^
3 V o5 i" R( H5 j( V- p = Pin('X1') # X1 has TIM2, CH1
1 n7 Q4 c v* } x: `' _ - tim = Timer(2, freq=1000)
& Q3 B4 I/ H; k$ T% c% Y+ @ O& z - ch = tim.channel(1, Timer.PWM, pin=p)" \: C) L# I, B) ] [' v6 h
- ch.pulse_width_percent(50)
复制代码
1 Q! [8 B8 L8 K# n# gADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC: v, L& Z9 c& R* U
- # j0 F( [# H/ e" `6 J) t/ _- P" \
- adc = ADC(Pin('X19'))
3 U8 A4 Z7 O" f' S8 X - adc.read() # read value, 0-4095
复制代码
2 ? \: R% s1 J6 i
1 e4 l8 O: _& I8 T0 H" SDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
2 B6 n5 @ X m% O1 s0 Y
* J2 T/ I* E0 _' \; Y3 _- dac = DAC(Pin('X5'))
) N* O- k, m* r% O6 s: F* z E - dac.write(120) # output between 0 and 255
复制代码
$ O9 K5 }. c) Z8 {1 R$ R( L$ O$ x# @. N( m1 Y! u3 g7 V' |
UART(串行总线)请参阅 pyb.UART. - from pyb import UART4 r+ n6 H |( }8 G$ n* @5 |, ]/ y- c
- " f- I: L. g6 h( A
- uart = UART(1, 9600)
- R5 S4 q# \$ h0 e& S$ x/ d - uart.write('hello')
/ m' o7 G# \# t c$ |) p - uart.read(5) # read up to 5 bytes
复制代码 ) ?: r, H' C/ d& S& F% d! O
/ z" F5 Y2 e$ Q' F
SPI总线请参阅 pyb.SPI. - from pyb import SPI; ~9 D" f8 L+ x* X7 Z
( f# z5 S3 t' e# D- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
- _2 F! b" M( w$ F - spi.send('hello')
+ q4 ?8 o9 _3 J9 l' `& n - spi.recv(5) # receive 5 bytes on the bus' ]% X# y; W! C& n1 }% k
- spi.send_recv('hello') # send and receive 5 bytes
复制代码 ( P- D* s$ a0 L
% }% n& l+ k1 }) t! u3 ~; y5 U1 q; qI2C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) m( g8 K4 i$ {- h+ `$ |
- $ U0 m7 B+ K! @6 v% j, ]
- i2c = I2C('X', freq=400000) # create hardware I2c object
% s( E* P0 B. i2 o% F p - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object" W) m! X! b: p) N4 D
- ; U3 m7 R/ u: @. l" I
- i2c.scan() # returns list of slave addresses
1 a/ O: j7 U6 K) `& h - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42+ G% Q8 [; t( z5 p5 v1 f& u
- i2c.readfrom(0x42, 5) # read 5 bytes from slave
5 N9 r, E3 d& P( p& j Y: H - ( x# ]; J6 _1 T) A G7 e0 l! w
- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
. g3 \/ ~: o1 e# N' X" J - i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
复制代码
/ B. C* H. C+ h- g* P
! K9 r$ V n' y- H. b注意:对于传统 I2C 支持,请参阅 pyb.I2C。 4 i' r! n% \/ c2 `$ i ?5 m
I2S总线参见 machine.I2S. - from machine import I2S, Pin
6 p7 @) b% H! Z& o# O - & f/ _4 H7 k' P0 q* L$ B; [
- 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
3 E: V. v* c. b' q5 |8 i - i2s.write(buf) # write buffer of audio samples to I2S device
8 b! [% b3 l8 C1 n' i - 3 i2 g/ F3 R5 u+ ]
- 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
3 U C t: s# `0 d - i2s.readinto(buf) # fill buffer with audio samples from I2S device
复制代码
W+ E6 W, P: Z9 hI2S 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。
' m8 T9 R3 |# m; F% y5 `6 mCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN. V+ I% J( B2 G/ _
- . q$ T1 w E0 C7 U: ]& `0 O9 w
- can = CAN(1, CAN.LOOPBACK)
8 f; g/ L3 C5 g, P G' ]7 t V" M - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
, k$ Y7 t; O; T) B* E. a - can.send('message!', 123) # send a message with id 123! s( W/ B; Q$ Y) ?2 |
- can.recv(0) # receive message on FIFO 0
复制代码
) S2 _, y V8 S. `
- j$ S0 z* }4 f; L' Z3 U内部加速度计参见pyb.Accel. - from pyb import Accel
4 S- ] B! X! T) w& ~* I2 B - 1 U7 e; H0 P/ T7 }# N3 }
- accel = Accel(): o# N' A5 ^9 f3 C! Q
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
复制代码
, e$ X$ \/ K* z* a" G, i
3 z) |8 I8 o8 n9 [( [6 i |