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:
3 H% G2 ?2 d: p通用板控制见 pyb. - import pyb( t8 y7 ^& v; j3 K& |
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- pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
G6 G/ A/ L5 w7 b! s, c' e - pyb.wfi() # pause CPU, waiting for interrupt
7 R& U, H& J1 t R+ }3 ` - pyb.freq() # get CPU and bus frequencies/ D. N: g: w+ V$ h# b# `8 T! K
- pyb.freq(60000000) # set CPU freq to 60MHz$ L* X5 z6 ^( Y0 [/ @+ h9 u1 P5 o
- pyb.stop() # stop CPU, waiting for external interrupt
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5 k$ j+ M3 L" b延迟和计时使用 time模块: - import time
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- time.sleep(1) # sleep for 1 second
- |8 G9 U7 v% h. N8 Y4 G, P - time.sleep_ms(500) # sleep for 500 milliseconds
5 i8 U1 J- D( O- j* g - time.sleep_us(10) # sleep for 10 microseconds" T7 ]: J1 [: U
- start = time.ticks_ms() # get value of millisecond counter
: m/ s) U3 X6 }4 M' a- h - delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference
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2 {% {& B) D C6 ]8 E, y7 i7 f: R内部 LED见 pyb.LED. - from pyb import LED- d9 r+ N4 U9 y# L0 `. W
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- led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
. I4 ?1 U1 j3 a - led.toggle()# Y. |2 I8 E3 x3 C
- led.on()/ I/ F) M! G$ u( }1 L# f. N
- led.off()6 d0 ]! r, y4 ]
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- # LEDs 3 and 4 support PWM intensity (0-255) \- |% m& C/ b8 V$ X
- LED(4).intensity() # get intensity
. T) V8 h/ r2 E. O" a1 g' 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 Switch9 P- q* |6 I& O
7 G* J; r5 ?% E- sw = Switch()
0 x; b( G& d9 \/ B- t, p! y: ~ - sw.value() # returns True or False+ Z5 [6 [" s+ N* P0 ^+ L
- sw.callback(lambda: pyb.LED(1).toggle())
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引脚和 GPIO请参阅 pyb.Pin. - from pyb import Pin X& d7 w7 R/ m8 m4 l9 @
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- p_out = Pin('X1', Pin.OUT_PP)! p* Q& h. c I
- p_out.high()1 U! [6 {+ v( [: F* Y2 l: a# g: P. O
- p_out.low()3 y' `5 Q4 T/ N' X+ V
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- p_in = Pin('X2', Pin.IN, Pin.PULL_UP): |5 e8 J3 |2 Y1 ^/ x- r' g" _- \* g
- p_in.value() # get value, 0 or 1
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1 u: t' w) C: R; _" q2 D伺服控制请参阅pyb.Servo. - from pyb import Servo
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* D* S' ^: A% N- F7 y- s1 = Servo(1) # servo on position 1 (X1, VIN, GND)) \6 o; I5 r2 X4 P8 @7 w- {
- s1.angle(45) # move to 45 degrees
$ |4 O# ?" _% _8 l- }: ? - s1.angle(-60, 1500) # move to -60 degrees in 1500ms
! Z1 r; s% Y# N" m7 }: F, q - s1.speed(50) # for continuous rotation servos
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外部中断请参阅 pyb.ExtInt. - from pyb import Pin, ExtInt2 _8 h! Y# _( X0 ^' l% t9 a9 O: T
( e0 g7 ?1 R! `- callback = lambda e: print("intr")
& b% W+ |. \# f7 |& | - 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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- tim = Timer(1, freq=1000)) g7 R4 _. s- O; f+ e: \$ ?3 E7 {& A
- tim.counter() # get counter value. h& x1 g/ z4 M
- tim.freq(0.5) # 0.5 Hz
1 W' R9 X5 V5 f2 H, K - 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 RTC
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' ?* A: k" }$ j& f- rtc = RTC()0 b5 X: k2 Z, e) [. K4 R+ p" b2 U
- rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
5 l& |% o* f* ^+ G" v - 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; D8 p6 f* |; ?' A M
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- p = Pin('X1') # X1 has TIM2, CH1
8 j* t' F& ?+ d - tim = Timer(2, freq=1000)# n' w" R9 n ^0 C
- ch = tim.channel(1, Timer.PWM, pin=p)
3 u/ z9 |) H6 J3 z0 s3 H - 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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- adc = ADC(Pin('X19'))
2 S+ d) `& v: [* \* } - adc.read() # read value, 0-4095
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% M# U/ }3 E" c/ _; zDAC(数模转换)请参阅pyb.Pin 和 pyb.DAC. - from pyb import Pin, DAC7 ~ b5 U, Z( W3 i; H# ?
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- dac = DAC(Pin('X5'))4 l* x, t$ K+ N$ r+ x, o* c/ M
- 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 UART1 e8 n) g+ [; x" [2 T; t
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- uart = UART(1, 9600)
3 q$ T+ K5 h4 o% F0 n. q- @% L/ | - uart.write('hello')
' r6 B+ V$ J' \& m! I - uart.read(5) # read up to 5 bytes
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SPI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)* h# i6 w' c' D" S6 \1 _0 m: K
- spi.send('hello')
: g( ], B0 N2 T - spi.recv(5) # receive 5 bytes on the bus
' Z% P( `# h+ R' `4 e! m) P - spi.send_recv('hello') # send and receive 5 bytes
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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! k- n* p2 g8 @$ x/ C
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- i2c = I2C('X', freq=400000) # create hardware I2c object/ w; A) y8 G( z( \
- i2c = I2C(scl='X1', sda='X2', freq=100000) # create software I2C object
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. O: N$ ~/ ]9 y! E3 Z9 ^% @- i2c.scan() # returns list of slave addresses
* o4 h+ [; @ U/ H2 T - i2c.writeto(0x42, 'hello') # write 5 bytes to slave with address 0x422 W1 I1 c a% h
- i2c.readfrom(0x42, 5) # read 5 bytes from slave
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@5 k0 {7 T1 |+ _' s' z* F2 l3 h- i2c.readfrom_mem(0x42, 0x10, 2) # read 2 bytes from slave 0x42, slave memory 0x10
% g3 _& u1 ]( @9 }% A' D6 ?" ~ - 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。 - w/ X7 }) p! C' r5 Q) q
I2S总线参见 machine.I2S. - from machine import I2S, Pin
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% I' n0 c: j2 g; q# i/ f% ]- 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' z" t8 Y! H; b" ^ - i2s.write(buf) # write buffer of audio samples to I2S device( \ A1 F4 Y9 N
0 E, q3 @1 u1 P; M- 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 object4 z* B: ~) c1 S. g3 D- y
- i2s.readinto(buf) # fill buffer with audio samples from I2S device
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I2S 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。
7 b9 {" f0 k3 A, n. J% |% SCAN总线(控制器局域网)参见 pyb.CAN. - from pyb import CAN
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- can = CAN(1, CAN.LOOPBACK)1 j2 {: Q, @" a* i% P; D
- can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))' D+ C+ ]4 d8 I# Q; J
- can.send('message!', 123) # send a message with id 123
) m7 K' D; A. K5 L! b/ C6 K - can.recv(0) # receive message on FIFO 0
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) v3 B; j6 t5 H2 N6 {内部加速度计参见pyb.Accel. - from pyb import Accel* W) @# V4 a2 [& C4 t7 Z
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- accel = Accel()
) q! `, d, n9 P; V) b+ @ - print(accel.x(), accel.y(), accel.z(), accel.tilt())
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