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: 7 C: t1 o s8 `" `
通用板控制见 pyb. - import pyb7 R, I0 {. o. Q9 D5 k
! r' H" u7 ?5 x `* }- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)" N" J* y3 w/ p3 ^, y) F! D) D9 y) {7 V
- pyb.wfi() # pause CPU, waiting for interrupt0 G0 ^' C: z3 c$ X# @7 X8 |5 q
- pyb.freq() # get CPU and bus frequencies
+ c- j4 d& A+ t% L I0 ~ - pyb.freq(60000000) # set CPU freq to 60MHz
0 A; E. Q$ p8 ]/ K/ ?% [" @6 |) l - pyb.stop() # stop CPU, waiting for external interrupt
复制代码
% _. f) `% l- E0 u3 M
$ S7 r* {% F4 ~3 m延迟和计时使用 time模块: - import time- _, ]1 g6 b+ w7 Q
- 8 f8 M! [" @8 F- C4 K' T3 H3 [
- time.sleep(1) # sleep for 1 second
7 m& Q K2 R$ z - time.sleep_ms(500) # sleep for 500 milliseconds) T- W. a* }4 m0 ~( ^% M% v
- time.sleep_us(10) # sleep for 10 microseconds/ u+ O' X' f8 n! V3 x
- start = time.ticks_ms() # get value of millisecond counter
' d3 ~8 f" {# G0 h7 m4 W( { - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
复制代码
e2 g/ k2 h6 z' B+ A& K
( U9 f9 ?" {0 `内部 LED见 pyb.LED. - from pyb import LED
% Y: {) k8 H! V! x( g; K - 4 P4 ?. S! C, X4 s7 s% v9 Z6 c0 N" _
- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
+ l: |' C/ O( `+ U0 T) i - led.toggle()
- ~: e; f9 p- z# y$ b' \ - led.on()
/ x+ `, h1 L5 v) n& {5 t+ i, ] m - led.off()
+ {0 D% F- j" `1 Q4 r - 3 C$ [2 V7 _/ f( M2 o+ P
- # LEDs 3 and 4 support PWM intensity (0-255)
; S3 \, h; f9 R3 W) b9 j - LED(4).intensity() # get intensity; }) o/ ~' e: B6 |3 o) q9 z$ ~
- LED(4).intensity(128) # set intensity to half
复制代码
+ M7 Q+ R! B; v( u: z5 r5 w7 e E2 Q% e6 E L1 P' C3 m8 C
内部开关请参阅 pyb.Switch. - from pyb import Switch7 H. e) A2 c* |; v
& K8 ?- a# K! J7 y3 h# e) Q. D( a5 E, J" r- sw = Switch()
+ E) B: n0 @* H, q5 @ L3 C - sw.value() # returns True or False
( |. Q/ z/ ~- b8 D, N - sw.callback(lambda: pyb.LED(1).toggle())
复制代码
; S, T! \5 h8 k" H
: K9 M( p6 D$ y引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin/ V1 F8 A0 Q8 ^5 f2 d0 K* R4 ]& Z) ^+ e3 D
. Z' F9 i$ C8 b1 Q0 O$ B- p_out = Pin('X1', Pin.OUT_PP)- Y1 J( l# [3 e# a) N$ O0 c
- p_out.high()
. |/ e% r" U% Q; d - p_out.low()
1 Z% l& k1 t* X - ! e7 M: p. `4 s5 M
- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
( K; J( Q' u7 t& b" g' _ - p_in.value() # get value, 0 or 1
复制代码
8 G9 `1 C: L0 M6 }% j$ Z, S/ ?2 ?/ }, H5 i. i
伺服控制请参阅pyb.Servo. - from pyb import Servo: y' w1 o/ ~5 x$ {3 i% i
& }4 [: G+ t# h: S. Q# J- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)0 b. M9 Z$ {% H1 n$ A
- s1.angle(45) # move to 45 degrees
3 v; Y7 r9 {3 Z. \ U' F( m8 a" X - s1.angle(-60, 1500) # move to -60 degrees in 1500ms0 B5 O0 k( k6 C; g" n4 ]: D
- s1.speed(50) # for continuous rotation servos
复制代码 / s8 `- U5 a8 J' p
* r% b0 E2 ^, `* [: W, E
外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt6 j7 c3 M+ R8 g ?- s1 [
) x; b% G; d6 W% ]- callback = lambda e: print("intr"): ?. f' J' G. r1 x- Z& Y4 r
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
复制代码
+ m; a& Q. u8 J+ ~8 t: R" I3 \% x- ]3 M5 F
计时器请参阅pyb.Timer. - from pyb import Timer2 a' y& D% ]- \5 G" H% \
. U+ y8 ]1 B( t$ T- tim = Timer(1, freq=1000)/ r4 N8 y; Q2 ?5 X, {1 r) C
- tim.counter() # get counter value
+ b% j: k" E; u8 |$ V0 {! V0 w+ f - tim.freq(0.5) # 0.5 Hz
( d2 m* @. x1 f, b! M - tim.callback(lambda t: pyb.LED(1).toggle())
复制代码 + w7 l$ A. p* ^; _# B: H$ A
RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC* C( H' K! x. A) J# \6 Y
5 K8 [% w: M/ G- rtc = RTC()
7 d9 L# ]! n3 L- ?% V - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
5 ?, \7 y+ l% U% p% d - rtc.datetime() # get date and time
复制代码
" X4 B+ d; d7 s% ^PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer/ M, {' Y& K* v) ]
- - g M8 f) n3 ]+ f
- p = Pin('X1') # X1 has TIM2, CH1$ D9 C; Q6 A' N) M( L4 r
- tim = Timer(2, freq=1000)
. F8 ^* }; u1 Z+ a& w - ch = tim.channel(1, Timer.PWM, pin=p): t) x5 K) n/ e5 @% ]4 o
- ch.pulse_width_percent(50)
复制代码
6 n& D0 \8 }/ y+ j' hADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC
0 O; `4 \1 X/ l( s7 L
, r k* Q' H; W* j# l1 R/ B' `- adc = ADC(Pin('X19'))
1 t8 P j6 l; \) ?, O% Q - adc.read() # read value, 0-4095
复制代码 ! j: Y) h5 `! |" z3 n
2 c, s1 W8 ]) c& _% K
DAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC: R; l8 W1 @2 D
- , p. ~# A3 G6 _, w
- dac = DAC(Pin('X5'))
1 m! i- h$ j0 U2 e- k/ D - dac.write(120) # output between 0 and 255
复制代码 6 Q3 v3 |* n7 G4 _8 P) T
/ c5 s+ {/ l. }# k [1 y# e
UART(串行总线)请参阅 pyb.UART. - from pyb import UART. c$ o6 M( w+ T. ]. e/ W
- 1 A0 S* W- X. S
- uart = UART(1, 9600)0 D# |5 Q: ?8 {# r6 ]$ C
- uart.write('hello')
( M& u1 w) d( Q$ Y) Q5 ^% B1 A4 ? - uart.read(5) # read up to 5 bytes
复制代码
+ D$ {6 s& S/ N4 f6 `) v1 Q3 O- P
3 q! S! T4 N8 i1 B# W9 LSPI总线请参阅 pyb.SPI. - from pyb import SPI
. e/ v9 q2 `9 K# m. I& y( e- u - - D: D4 J/ h2 ?" p6 ~3 x
- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
+ D/ k- l8 g: \1 E; R: y) E# u - spi.send('hello')+ L( ?$ d$ Y1 j
- spi.recv(5) # receive 5 bytes on the bus: K6 Z* A! t/ |' B1 t6 ]1 X4 k
- spi.send_recv('hello') # send and receive 5 bytes
复制代码 4 J6 W5 v0 _) E0 e& T: B
0 a1 ]5 ^; E1 F. R* `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 I2C3 ~7 Z$ _2 `4 w+ a5 p- ?9 \& V1 N
- 4 z/ b8 e; @) b" ^
- i2c = I2C('X', freq=400000) # create hardware I2c object+ G6 N" C' A+ J7 q3 q9 s
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
# f3 n3 D, c5 A$ U - & c; _: v" m: M
- i2c.scan() # returns list of slave addresses
" w" d# E2 h2 M' p - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42# h9 t& ?' S& a/ X5 E! }7 `7 `
- i2c.readfrom(0x42, 5) # read 5 bytes from slave% c0 @; o9 H. J+ n/ H# `4 o! A; L
4 h7 g- d% d" M5 c; V- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
) V- r+ h; k2 V2 L. M - i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
复制代码
* S5 _- s, ^7 Q1 w Z0 z
6 p4 M. f- P! j |. N注意:对于传统 I2C 支持,请参阅 pyb.I2C。 5 h+ E3 l! a2 d% t9 Y/ t
I2S总线参见 machine.I2S. - from machine import I2S, Pin
7 w, y% h4 d2 s1 E" \5 m5 R0 \! K' e
2 H7 J6 C0 o0 w/ @0 O7 ~7 Z/ 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* c+ }8 `: q6 E$ m0 @ {' p4 X- u1 K4 T
- i2s.write(buf) # write buffer of audio samples to I2S device3 ?) c- k5 H- T" W0 e t
- 7 |+ n( g# n9 n. S. b/ N4 U2 t
- 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 p; h8 T1 v0 |5 n# O
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
复制代码
2 M9 A6 f$ {8 ]2 z2 C4 W, x! F9 sI2S 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。
' [: \- A# A* v, ]CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
) j( n, v' O- U$ n* H
& t7 b4 p2 D/ B5 p- can = CAN(1, CAN.LOOPBACK)
* @; o/ E! H. v+ b- d - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126)); _; t/ N- P6 i
- can.send('message!', 123) # send a message with id 123* b9 C9 Z7 Q! i9 w1 w. r
- can.recv(0) # receive message on FIFO 0
复制代码 , U, M: [$ K1 y+ z& a" A
m1 ?, v# E! X4 A
内部加速度计参见pyb.Accel. - from pyb import Accel6 k m; @( D l x. s! s& y) l* \
1 I: a% d1 b7 m b1 A- o% a- accel = Accel()# E# k/ q4 P, ?0 l
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
复制代码 8 { ~! v+ v" i o) W0 P- G/ g
! G( j( R4 D/ u, {; t9 [/ b' c
|