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:
4 x8 |- n) x4 C* _& 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)
+ j% T4 r2 t7 @( @" ^% h: N0 P - pyb.wfi() # pause CPU, waiting for interrupt2 ?" D6 ]8 k- W$ ~6 A: G4 m9 W
- pyb.freq() # get CPU and bus frequencies
% |' I; [$ s3 s# l- B, Q/ i3 } - pyb.freq(60000000) # set CPU freq to 60MHz
2 M: P! C! |3 p - pyb.stop() # stop CPU, waiting for external interrupt
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% L( w, O# b: q$ v延迟和计时使用 time模块: - import time
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- time.sleep(1) # sleep for 1 second
) J. }, n3 o3 p6 e - time.sleep_ms(500) # sleep for 500 milliseconds
+ W: t$ f' R) o2 s - time.sleep_us(10) # sleep for 10 microseconds5 h1 B+ Y1 J' R) {$ s' {8 h; Z
- start = time.ticks_ms() # get value of millisecond counter
' {, A9 `8 @" A3 l8 @, T - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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0 o& L; W2 ]) g/ W, m2 i* s5 k) R内部 LED见 pyb.LED. - from pyb import LED! w, M6 O- t6 [& D% b$ ~# p
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
* Z+ W0 y- D* Q7 s' F6 m - led.toggle()
$ @- l1 a' E9 Q: e4 U - led.on()" n& n$ @1 f/ ^- q
- led.off()
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+ U7 D+ b( z4 b- # LEDs 3 and 4 support PWM intensity (0-255)5 o, I6 f1 F( x; `4 P
- LED(4).intensity() # get intensity* O4 X4 `* B4 n: M+ R9 x
- LED(4).intensity(128) # set intensity to half
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内部开关请参阅 pyb.Switch. - from pyb import Switch
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- sw = Switch()0 E+ f* h# s# I2 T X% j+ f: }8 n
- sw.value() # returns True or False
% L- y7 r- n: |) e; y# r - sw.callback(lambda: pyb.LED(1).toggle())
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& `' t$ i( P4 q9 {引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin7 D& B8 L% Q4 m9 J
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- p_out = Pin('X1', Pin.OUT_PP)
3 J" |: V7 L4 [6 k9 }3 C# W - p_out.high()
" t H* K! P9 S& Y$ ]. o/ A, I6 ? - p_out.low()7 Z1 H z, ?. r7 g' g8 }6 r
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP)2 J% B+ @% h2 B8 `% y" A! N
- p_in.value() # get value, 0 or 1
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3 a" q- \6 p% ^, a伺服控制请参阅pyb.Servo. - from pyb import Servo* y3 l$ Y0 y; r5 l/ P+ d
* ~$ b- [; B1 R2 G$ `2 v* e- s1 = Servo(1) # servo on position 1 (X1, VIN, GND); P: m6 @0 q7 {% H6 }" d+ E
- s1.angle(45) # move to 45 degrees4 F" h1 ~$ _0 g$ t# X0 r- d
- s1.angle(-60, 1500) # move to -60 degrees in 1500ms4 A5 T* F1 F8 f7 K
- s1.speed(50) # for continuous rotation servos
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+ w/ t4 j6 l& @ [0 R外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt
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" D9 t& ^5 b5 \$ X# D6 t- callback = lambda e: print("intr")2 m; _+ s |8 ]0 E
- 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
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' M4 \* z$ Z/ F- tim = Timer(1, freq=1000)) c* ^5 n/ M, y8 s
- tim.counter() # get counter value
6 ^1 c; L0 i7 U5 Y- Z- E - tim.freq(0.5) # 0.5 Hz. `, U* O( X6 U G& ^
- tim.callback(lambda t: pyb.LED(1).toggle())
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RTC(实时时钟)请参阅 pyb.RTC - from pyb import RTC3 d# R$ u+ L [0 u. [6 U8 T- j
- 0 Z% m+ o0 @7 ~5 `# g$ g
- rtc = RTC()# b7 E: n a' v/ p
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time: b8 R7 h' ^$ N( U. i# E/ X
- rtc.datetime() # get date and time
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4 J( u4 y" Z& f; ^1 L* a. C/ k- gPWM(脉宽调制)请参阅pyb.Pin 和 pyb.Timer. - from pyb import Pin, Timer) e8 H, T, v8 I& h
( e: ~- e* f4 g$ J- p = Pin('X1') # X1 has TIM2, CH1' Z# U4 w8 f' M; D& ^' N
- tim = Timer(2, freq=1000)2 R' O9 n1 a! N" `, t' c8 L! L3 U
- ch = tim.channel(1, Timer.PWM, pin=p)) _. ?9 c A! E% K: z
- 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* n0 Y' G3 m( Q& L, ]4 n# L4 b; b
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- adc = ADC(Pin('X19'))
5 i; C* b9 W* X/ p5 S% x - adc.read() # read value, 0-4095
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DAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC
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- dac = DAC(Pin('X5')); q7 ]% t7 E! S* S
- dac.write(120) # output between 0 and 255
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9 E* T0 |/ B9 k m0 W& uUART(串行总线)请参阅 pyb.UART. - from pyb import UART$ I- k4 e* ^$ e8 Y% `! a9 `: P
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- uart = UART(1, 9600)% I, `! G3 n" U
- uart.write('hello')
; ^$ q4 r# C9 `. S9 n - uart.read(5) # read up to 5 bytes
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! K3 e8 K- y* p8 I% tSPI总线请参阅 pyb.SPI. - from pyb import SPI
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- spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)! D7 T9 _( G5 l. H8 [9 O
- spi.send('hello')
9 o2 ^* ]& ~0 s5 Q: a1 ~ - spi.recv(5) # receive 5 bytes on the bus
) Q- C6 o% t/ a- q7 z( w - spi.send_recv('hello') # send and receive 5 bytes
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5 r ]8 U1 V7 l) LI2C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- A+ O9 i+ f" d- W9 i) `
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- i2c = I2C('X', freq=400000) # create hardware I2c object! k: ?* v+ U; J) v. Y3 v0 j
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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1 B0 {( B8 _6 r4 b- i2c.scan() # returns list of slave addresses* L% Q" \8 f; F
- i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x42
! B3 N2 [5 j: X - i2c.readfrom(0x42, 5) # read 5 bytes from slave; Z- _: \4 T7 d! T
# O; P1 _4 p* N2 i5 M' j5 q. i- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
0 d/ U) N+ a# L+ ~ - 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。
& o4 y/ L5 R, H" \' Q& }I2S总线参见 machine.I2S. - from machine import I2S, Pin4 C8 g0 ~0 S/ k3 F6 {6 ^+ n n
8 Y% U6 Q+ F" |1 k- 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" s4 X, k/ I+ u) W2 p7 X0 [
- i2s.write(buf) # write buffer of audio samples to I2S device
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4 K; X3 i, ~& K+ U- B5 k- 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
4 L4 t) t2 _9 Z" F - i2s.readinto(buf) # fill buffer with audio samples from I2S device
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5 @1 A& A0 J8 p1 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。 $ _' W+ q! Y6 ^2 g( \! C
CAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN" Y; y4 [% @6 G6 [! y
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- can = CAN(1, CAN.LOOPBACK), t5 i; j9 E- L) z
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
3 B1 i; H5 P; M9 p) e/ i - can.send('message!', 123) # send a message with id 123
4 x$ v! `& z; |% A, g& `$ Z* G2 T - can.recv(0) # receive message on FIFO 0
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. c% u. F0 u9 \% a1 ]/ ^内部加速度计参见pyb.Accel. - from pyb import Accel! f- `, e! E- n# L# v
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- accel = Accel()
& Q0 U. e- |/ K3 @ - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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