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pyboard:quickref

pyboard快速参考

下面的引脚图是 PYBv1.0. pyboard其他版本的见: PYBv1.1 PYBLITEv1.0-AC PYBLITEv1.0.

PYBv1.0 pinout

通用硬件控制

See pyb. :

import pyb

pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)在UART(1)上重置REPL
pyb.wfi() # pause CPU, waiting for interrupt 暂停cpu,等待中断
pyb.freq() # get CPU and bus frequencies 获得CPU频率
pyb.freq(60000000) # set CPU freq to 60MHz 设置CPU频率
pyb.stop() # stop CPU, waiting for external interrupt 停止cpu,等待外部中断

延时和时间

Use the time <utime> module:

import time

time.sleep(1)           # sleep for 1 second 延时1s
time.sleep_ms(500)      # sleep for 500 milliseconds 延时500ms
time.sleep_us(10)       # sleep for 10 microseconds 延时10us
start = time.ticks_ms() # get value of millisecond counter 获取毫秒计数器的值
delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference 计算时间差

LED 发光二极管 —-

See pyb.LED <pyb.LED>. :

from pyb import LED

led = LED(1) # 红色 led
led.toggle()
led.on()
led.off()

Pins and GPIO

See pyb.Pin <pyb.Pin>. :

from pyb import Pin

p_out = Pin('X1', Pin.OUT_PP)
p_out.high()
p_out.low()

p_in = Pin('X2', Pin.IN, Pin.PULL_UP)
p_in.value() # get value, 0 or 1

舵机控制

See pyb.Servo <pyb.Servo>. :

from pyb import Servo

s1 = Servo(1) # servo on position 1 (X1, VIN, GND) 位置1的servo(X1)
s1.angle(45) # move to 45 degrees
s1.angle(-60, 1500) # move to -60 degrees in 1500ms 在1500ms内移动到-60度
s1.speed(50) # for continuous rotation servos 连续旋转舵机

外部中断

See pyb.ExtInt <pyb.ExtInt>. :

from pyb import Pin, ExtInt

callback = lambda e: print("intr")
ext = ExtInt(Pin('Y1'), ExtInt.IRQ_RISING, Pin.PULL_NONE, callback)

定时器

See pyb.Timer <pyb.Timer>. :

from pyb import Timer

tim = Timer(1, freq=1000)
tim.counter() # get counter value 获取计时器值
tim.freq(0.5) # 0.5 Hz
tim.callback(lambda t: pyb.LED(1).toggle())

PWM脉宽调制

See pyb.Pin <pyb.Pin> and pyb.Timer <pyb.Timer>. :

from pyb import Pin, Timer

p = Pin('X1') # X1 has TIM2, CH1
tim = Timer(2, freq=1000)
ch = tim.channel(1, Timer.PWM, pin=p)
ch.pulse_width_percent(50)

ADC (模数转换)

See pyb.Pin <pyb.Pin> and pyb.ADC <pyb.ADC>. :

from pyb import Pin, ADC

adc = ADC(Pin('X19'))
adc.read() # read value,读取值 0-4095

DAC (数模转换)

See pyb.Pin <pyb.Pin> and pyb.DAC <pyb.DAC>. :

from pyb import Pin, DAC

dac = DA
本页面的其他翻译:
pyboard/quickref.txt · 最后更改: 2019/01/31 18:01 由 Spoony