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: ) d1 t9 t# {. W5 w* U3 }" n
通用板控制见 pyb. - import pyb
+ V1 I$ ?7 \% v6 ] P S
: x. n3 g8 n' M, @- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)6 u& h/ ]4 Q8 R0 Y; T4 @
- pyb.wfi() # pause CPU, waiting for interrupt- r) T5 }* a p0 {. c
- pyb.freq() # get CPU and bus frequencies
& l; [7 c" g* v0 H - pyb.freq(60000000) # set CPU freq to 60MHz! W4 E) k4 s7 i* T% `
- pyb.stop() # stop CPU, waiting for external interrupt
复制代码
$ X( ^5 B E3 O: G8 m. O
! N- T: h1 H; d; S: P |延迟和计时使用 time模块: - import time
8 H3 z0 j. e O. e; n
6 z+ e: ?$ C3 N' C& [5 J" t- time.sleep(1) # sleep for 1 second3 j8 e5 ~5 ^* l+ Y- |" d3 T3 S
- time.sleep_ms(500) # sleep for 500 milliseconds
8 |6 \( }$ q \( r - time.sleep_us(10) # sleep for 10 microseconds& d- [- J* [6 C% ~/ a1 t
- start = time.ticks_ms() # get value of millisecond counter$ Q1 z$ S3 r4 _. Y) x
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
复制代码 / r$ |0 D- _: U$ F/ v) [* i& d
$ T9 H/ z% j+ v4 Q内部 LED见 pyb.LED. - from pyb import LED
% z5 V6 G% @0 o0 N$ X) P
& T0 x; }2 U. ~, y( c8 N- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
' z* n7 m) n' C+ a. Y9 i! S: H - led.toggle()
2 z, @: U# s: A4 N x0 m - led.on()
5 U h3 b* Z1 ^$ z Y - led.off()5 e# }9 f: E. u' _. m
- " u$ N+ h% h+ X1 A& C
- # LEDs 3 and 4 support PWM intensity (0-255)
! G* k- l4 ^0 R( v- } - LED(4).intensity() # get intensity8 X: T B$ L6 g3 u2 K5 o4 w
- LED(4).intensity(128) # set intensity to half
复制代码
8 V4 P- ?% X- Y7 Y) Y& B+ {' \2 v$ Z( `4 G1 y" i! G
内部开关请参阅 pyb.Switch. - from pyb import Switch1 d0 S8 d: p* W5 i( [+ u5 p
* m; O1 l1 Y* ^, v- sw = Switch()5 v+ a! ^" p1 G
- sw.value() # returns True or False
# H' P* O' k: |/ {- S! E - sw.callback(lambda: pyb.LED(1).toggle())
复制代码
" s6 V m; [; ^' f1 S8 o) Q
2 D2 \( o3 p' J; c引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin
+ N" h/ v0 K! f- W- l6 ^6 _ - ; n( z# m" j, H9 T$ ^
- p_out = Pin('X1', Pin.OUT_PP): \+ n9 {. V' I
- p_out.high()
! }' T& j: }0 E1 D - p_out.low()/ V" {+ f6 Y' |
- g+ P! C( |9 o5 ~8 M5 T X Q
- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
* p x; R& o+ K+ Q% E: m4 y! | - p_in.value() # get value, 0 or 1
复制代码
, M0 A. E6 [6 p8 e/ A
1 `! d5 j" I* D7 ]; i% s" e& V% e伺服控制请参阅pyb.Servo. - from pyb import Servo
9 f; T" X3 x/ f, ?( g - $ ^$ d1 z2 z# R
- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)' ~. X1 a0 T! |/ g! c2 O! m( `
- s1.angle(45) # move to 45 degrees
& C% ]7 }# b9 a3 C. S6 e* X - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
; C( `- v* `, A0 h7 O7 \ - s1.speed(50) # for continuous rotation servos
复制代码 & b x( D8 P Y/ u
) L/ Y; n; W; O7 ?& X; k外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt0 e& p5 R+ f; k( Q/ t2 ]
6 h/ l2 L! ]. e. U7 K9 i- callback = lambda e: print("intr")+ Q/ F+ ~4 \% B
- ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)
复制代码
d! \$ R w6 r1 O- ~- J& D( a
% m0 a8 K0 y/ l5 Z8 G& o计时器请参阅pyb.Timer. - from pyb import Timer
# l. E: P; n) L& j" {0 P8 J/ ?
% \9 M; ]! N0 r8 n! v4 L- tim = Timer(1, freq=1000)6 n3 @5 i0 g e# j* B8 k
- tim.counter() # get counter value0 o* ~0 Y7 U8 t. x) S5 L; a2 p
- tim.freq(0.5) # 0.5 Hz% m( B* Q$ N% {( [: F0 B* l
- tim.callback(lambda t: pyb.LED(1).toggle())
复制代码
0 A; ~, l$ b. l4 r2 SRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC {2 v, e5 c8 I X( D
- * } X. D+ c1 M" }& z. Y8 Z+ P2 V
- rtc = RTC()
# U ]) {) }6 K2 b0 w9 a- R0 J6 O X - rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time3 K( w* E6 y, z5 y* O* X: N
- rtc.datetime() # get date and time
复制代码 ! ^% J7 @6 f4 D: i7 v1 n0 f
PWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer8 G# Y7 k4 U4 a; A
- 6 k$ |4 Y4 r' ?4 u, b: V
- p = Pin('X1') # X1 has TIM2, CH1
6 {' _! M* Z7 v' F2 ]9 B - tim = Timer(2, freq=1000)
6 k. n M' V# j7 g/ s - ch = tim.channel(1, Timer.PWM, pin=p)- X4 g+ G) Q G2 u
- ch.pulse_width_percent(50)
复制代码
) c; @& u! |6 U3 U8 BADC(模数转换)请参阅pyb.Pin 和pyb.ADC. - from pyb import Pin, ADC
* [" V& Z" f6 [7 J
' `& J/ o L, X- adc = ADC(Pin('X19'))) x: m( u3 F8 D
- adc.read() # read value, 0-4095
复制代码 ( `2 r* J$ r8 Q; G
( h. ?1 @5 n0 `, W/ i& W+ `: k
DAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC4 K8 x7 M3 ]$ @
- ! f5 K5 M3 Q' m0 c, y
- dac = DAC(Pin('X5')): E" G1 L1 e$ r% J
- dac.write(120) # output between 0 and 255
复制代码 : J; ^8 @9 g, y* S& i
0 T% A8 }, Z( l! DUART(串行总线)请参阅 pyb.UART. - from pyb import UART6 a7 t6 J6 q- M% \1 A+ i
; V8 B, u# T* _/ ~ W- uart = UART(1, 9600)4 S2 p Y( W! M) v. ` F$ y% `5 f/ o
- uart.write('hello') \7 N0 l( [) b' m: f/ Q. D8 E6 J
- uart.read(5) # read up to 5 bytes
复制代码
T5 j- T3 K% P- }
& c3 ^5 Y* ~! RSPI总线请参阅 pyb.SPI. - from pyb import SPI4 f, J5 l' {5 n" x
+ s3 p! L. K0 }, z+ b" @- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)! f, l% }+ @4 M3 o6 z9 p
- spi.send('hello')
: I: _4 x- q! k8 u( _- V' I - spi.recv(5) # receive 5 bytes on the bus5 P! T% X3 P$ C# R7 u( e! @) w' p
- spi.send_recv('hello') # send and receive 5 bytes
复制代码 5 S' F- I7 S, l- |4 S+ J, p W
& T( T8 G% ?5 o9 i5 p
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" i4 K' U- M1 u0 t3 d
8 h- A* u3 I* [/ ^- F3 v2 S- i2c = I2C('X', freq=400000) # create hardware I2c object
' h/ L, g% T! h+ m1 @ - i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
9 p0 T# R9 z: M( L: x# { - 9 l7 Q4 ~! H: R% K6 ]
- i2c.scan() # returns list of slave addresses9 d3 u# ~! X( ~8 O# X0 h
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
A* p3 F2 W, S! [: S - i2c.readfrom(0x42, 5) # read 5 bytes from slave
" x) R- G) Y2 K
3 d+ t. ]- M1 `+ a6 h- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10& B( z1 D3 Q! [1 A
- i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
复制代码 |+ s' o! _8 P# ~
{* N: I/ }, [7 Q
注意:对于传统 I2C 支持,请参阅 pyb.I2C。
2 r' i/ U: O" q: M; Q" L9 Q5 Z mI2S总线参见 machine.I2S. - from machine import I2S, Pin
( Q# M. }, k! M# s' w - - [+ l5 m1 c7 V1 F6 [
- 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$ H$ F2 K4 P( h5 n* \* i
- i2s.write(buf) # write buffer of audio samples to I2S device
" J" g6 U- [" E - ' Q6 G5 B7 {0 Z ?/ k* F
- 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) X( [- H; o5 a# x- O- Y
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
复制代码
% o7 ~9 u1 K) n- T" G$ m4 h$ pI2S 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。
6 Q0 U9 P: Q2 ACAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
: I' P: T, b/ q) {& ?6 K k% n - * V( s+ b* x0 Q f3 `* Q
- can = CAN(1, CAN.LOOPBACK)
+ |. ^9 S/ A, g" T" E" Q - can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126)), x; A" r- v$ I2 f# D. ?, M
- can.send('message!', 123) # send a message with id 123% Z' [0 r1 J7 R& F% ~( i; d9 I
- can.recv(0) # receive message on FIFO 0
复制代码 & y, w" F9 c) n y7 f
$ p+ p8 [! n$ ^# X* g# H$ w
内部加速度计参见pyb.Accel. - from pyb import Accel
: `$ n+ R2 z3 T) `$ F0 w0 ` - 3 D k# v I9 m. D' s% @6 [
- accel = Accel()
/ g" V# p8 |9 D1 v - print(accel.x(), accel.y(), accel.z(), accel.tilt())
复制代码
% }1 X* d0 f& X5 c
3 |0 B4 _7 t. o. d- x) u/ } S0 W, ]; r |