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:
6 o5 y1 Z D8 M+ D$ A- H2 N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)
+ a, m3 l8 @& `& K5 _ - pyb.wfi() # pause CPU, waiting for interrupt2 u1 |% K5 |* n2 j1 R% A
- pyb.freq() # get CPU and bus frequencies
+ R3 J1 H% U, r - pyb.freq(60000000) # set CPU freq to 60MHz9 K5 T6 X3 }3 Q T7 J
- pyb.stop() # stop CPU, waiting for external interrupt
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延迟和计时使用 time模块: - import time
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" E' \$ T1 N5 B/ Z7 n( {" q7 a- time.sleep(1) # sleep for 1 second) N+ R, m6 U) R2 e) w) ?4 A
- time.sleep_ms(500) # sleep for 500 milliseconds2 N: x, M1 o& l8 u5 z8 ]
- time.sleep_us(10) # sleep for 10 microseconds
( G* R. H' T# t$ ^3 c - start = time.ticks_ms() # get value of millisecond counter+ f+ x) z. j; o! v1 U
- delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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' }9 ^3 B6 c. r5 A( O- {内部 LED见 pyb.LED. - from pyb import LED2 z& _# X) `( e$ {
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue3 c/ W; g" ]8 w- B& \
- led.toggle()
% Q1 x0 B7 ]/ { - led.on()
) }7 e0 z% W1 m - led.off()
# z( {8 ?0 L% c* d - p" h0 A9 E9 _, M
- # LEDs 3 and 4 support PWM intensity (0-255)8 _, _+ J2 I9 k6 }) i
- LED(4).intensity() # get intensity
1 l* \/ M1 l# }: n/ T& x" ] - LED(4).intensity(128) # set intensity to half
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" _' T, b- i. J8 Z! _' ?内部开关请参阅 pyb.Switch. - from pyb import Switch
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2 V) |9 A& }# [! \6 L- sw = Switch(): t7 Q+ V+ ^3 E" q6 m
- sw.value() # returns True or False
_, y; z7 B9 B& g \ - sw.callback(lambda: pyb.LED(1).toggle())
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& i. ~# j3 ?. o$ [引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin- Z, z; x) b3 ^3 l0 Y7 }
& Y6 _6 E# Q8 _4 D' K- p_out = Pin('X1', Pin.OUT_PP)
3 _/ V, g0 V$ F V2 I/ F7 z' a - p_out.high()! e# c* O4 F- j8 e9 x* R+ w
- p_out.low()
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
5 C, s+ a" `$ Y/ Y - 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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3 v2 O& w2 g( h r$ t2 `$ q% ~. s- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)( z2 q/ o- R1 Y" e+ s
- s1.angle(45) # move to 45 degrees- }4 g v: l: f+ _1 ` o
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms
' {' r* A% j6 Z4 o! l( n - s1.speed(50) # for continuous rotation servos
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m3 b" l! B9 V; N" B8 L. v外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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; ?5 Q' `: g, }' U: |) ~- callback = lambda e: print("intr")
5 }' I) a$ F; G# \% v - 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 M" _2 G2 a0 \5 t* e0 r; y
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- tim = Timer(1, freq=1000)
) G& m; u$ r; h' |0 b - tim.counter() # get counter value
* c1 R; q) n0 O$ \' W0 Q/ y. o - tim.freq(0.5) # 0.5 Hz
; u( ]0 b1 A& B4 Y! {" r) K3 ~ - tim.callback(lambda t: pyb.LED(1).toggle())
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* Z" c& R9 q& c+ R: i9 NRTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC
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4 M" Y9 {! p+ V" V/ S) R3 t- rtc = RTC()3 B- |8 P8 i' ^% d4 O4 Z* \
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time! x7 ~8 y2 W2 J6 ]; V5 n% Y
- 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" o( ?) A" w6 U; r# X
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- p = Pin('X1') # X1 has TIM2, CH1( v' [# N5 t- ~ [7 } x
- tim = Timer(2, freq=1000)
' a0 s7 P& P1 c k- s* z8 ?( _ - ch = tim.channel(1, Timer.PWM, pin=p)0 T3 R. \( T- z) d! `7 O
- 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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) P0 D( `; j! e8 P) v$ E' j9 L- adc = ADC(Pin('X19'))/ |7 A! z% h S6 }( t$ G& P
- adc.read() # read value, 0-4095
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& P3 w, q; V5 G* V* SDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC+ G. n4 H: Q/ f1 g* D: z& Y
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- dac = DAC(Pin('X5'))( z; E& Z# Y4 w7 T; m3 R5 d. U& b
- 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* U/ {) R+ e& f
, \ z' [0 f, M2 i, W( @% A- uart = UART(1, 9600)
3 ?) W9 }7 M9 j4 p1 P M3 N4 s - uart.write('hello')) ^. @. A' ?5 d8 P# F4 _
- uart.read(5) # read up to 5 bytes
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SPI总线请参阅 pyb.SPI. - from pyb import SPI* X% @9 @, x+ Z! O5 p# V- l/ F
: j( _! {9 S; y) V! _- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)9 v1 l r; H6 b5 t- C
- spi.send('hello')
* V9 I( R/ Z4 P - spi.recv(5) # receive 5 bytes on the bus
% s& [1 y1 I* I) B9 z% v4 x - spi.send_recv('hello') # send and receive 5 bytes
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' A7 U. Y) N: `# K+ G0 P5 k0 FI2C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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; d) H& Q8 v' v" x1 T% }- i2c = I2C('X', freq=400000) # create hardware I2c object7 M2 n/ w) A& v5 i6 v0 }. g
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object0 i$ J/ N. q+ T
: X* U7 t. }8 v. g/ `8 I- i2c.scan() # returns list of slave addresses9 A+ v# S3 ], s5 E& V: O P
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x427 X7 Q: a! G/ x. i
- i2c.readfrom(0x42, 5) # read 5 bytes from slave" U4 V# G4 E/ z
: m9 D7 b$ z( |: x0 O- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10. w" B; I: L, p! U# y
- i2c.writeto_mem(0x42, 0x10, 'xy') # write 2 bytes to slave 0x42, slave memory 0x10
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6 w5 [/ f! C0 q! j" S8 M注意:对于传统 I2C 支持,请参阅 pyb.I2C。 * P3 T+ V* z5 F' A% J8 N: X
I2S总线参见 machine.I2S. - from machine import I2S, Pin T% ?+ i" j! ~; u8 d8 r
7 C0 ~! S- ]' {" S- 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 object5 f' u) V) p4 C7 r# u, K
- i2s.write(buf) # write buffer of audio samples to I2S device
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+ g' [% B) W& h; G- 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 object5 P9 y3 A) N* e3 Y1 x: J6 @
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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: L3 s, H Q) \' M4 b: M+ @( 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。 3 @1 ]9 q' ]" Z7 \; q9 v A' r
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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+ H. H+ [5 [0 {( q/ Y- can = CAN(1, CAN.LOOPBACK)8 r1 I, M- h* J5 P" `5 \; I
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))6 I( D! A$ F9 S: r W
- can.send('message!', 123) # send a message with id 1233 k8 \6 [: T' S D4 @4 [% ^
- can.recv(0) # receive message on FIFO 0
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- l7 l) i7 Z% `6 l( I& m/ |$ M内部加速度计参见pyb.Accel. - from pyb import Accel( I, L3 G' X0 Q0 A( p
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- accel = Accel()- v6 ?1 e5 X& ~5 F2 I
- print(accel.x(), accel.y(), accel.z(), accel.tilt())
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