Pyboard快速入门

Pyboard(pyboard)板简称PYB或pyb,运行使用的是MircoPython文件系统,MicroPython是在单片机上可以跑的Python,也就是说,你可以通过Python脚本语言开发单片机程序.在MicroPython设备板(pyboard)上你可以通过Python代码轻松控制微控制器的各种外设,比如LED等,读取管脚电压,各种总线通讯,或控制其他设备联网通讯等等。 使用python语言的好处就是几乎要实现的控制环节用3行代码就可以搞定,开发周期短,见效速度快,从想法到实现没有中间环节。

源地工作室提供的可用uPython的pyboard版本

官方标准版复刻版PYBV1.1:

PYBv1.0 pinout

加强版PYBV1.1PLUS:

PYBv1.0 pinout

mini版PYBV1.1mini:

PYBv1.0 pinout

各个版本功能引脚示意图

PYBv1.1 pinout PYBv1.1 pinout PYBv1.1 pinout

python编程工具介绍

python是一种解释性语言,如果将板子内部植入了Mircropython系统,也就意味着将python语言的解释器,植入到了STM32芯片内,这样用户程序就不像C语言那样,在芯片外编译,链接了,这就意味着,Pyboard使用的python程序,不需要像C语言那样需要复杂的IDE了,理论上讲,windows自带的记事本软件就可以了,不过记事本这样的软件,无法提供关键词高亮,提示,格式的对齐也是挺不直观的,显的十分LOW,我推荐用户使用专业的程序编辑软件,如果你有高级语言使用基础,大型的高级语言开发工具一般都支持Python语言,继续用就行,如果用户没有编程基础或者只是想入门编程,我推荐使用

Sublime Text 下载

PYBv1.0 pinout

使用Pyboard必须掌握的知识

Pyboard必须掌握的基本信息,调试技巧和开发流程重点!!!!如果你忽略这些知识点,将在使用pyb板python语言开发中多走90%的弯路。

实验例程

实验例程讲述各种应用实验,在实验中学Python编程,电子电路知识。

基本功能测试示例

详情参考 pyb.

import pyb

pyb.repl_uart(pyb.UART(1, 9600)) # duplicate REPL on UART(1)
pyb.wfi() # pause CPU, waiting for interrupt
pyb.freq() # get CPU and bus frequencies
pyb.freq(60000000) # set CPU freq to 60MHz
pyb.stop() # stop CPU, waiting for external interrupt

延时和定时

使用 time 模块:

import time

time.sleep(1)           # sleep for 1 second
time.sleep_ms(500)      # sleep for 500 milliseconds
time.sleep_us(10)       # sleep for 10 microseconds
start = time.ticks_ms() # get value of millisecond counter
delta = time.ticks_diff(time.ticks_ms(), start) # compute time difference

板载LED控制

参考 pyb.LED.

from pyb import LED

led = LED(1) # 1=red, 2=green, 3=yellow, 4=blue
led.toggle()
led.on()
led.off()

# LEDs 3 and 4 support PWM intensity (0-255)
LED(4).intensity()    # get intensity
LED(4).intensity(128) # set intensity to half

板子用户按键

参考 pyb.Switch.

from pyb import Switch

sw = Switch()
sw.value() # returns True or False
sw.callback(lambda: pyb.LED(1).toggle())

引脚和通用输入输出引脚控制

参考 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

参考 pyb.Servo.

from pyb import Servo

s1 = Servo(1) # servo on position 1 (X1, VIN, GND)
s1.angle(45) # move to 45 degrees
s1.angle(-60, 1500) # move to -60 degrees in 1500ms
s1.speed(50) # for continuous rotation servos

外部中断

参考 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

参考 pyb.Timer.

from pyb import Timer

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

RTC (实时时钟)

参考 pyb.RTC

from pyb import RTC

rtc = RTC()
rtc.datetime((2017, 8, 23, 1, 12, 48, 0, 0)) # set a specific date and time
rtc.datetime() # get date and time

PWM (脉宽调制输出)

参考 pyb.Pin & 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)

参考 pyb.Pin & pyb.ADC.

from pyb import Pin, ADC

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

DAC (数模转换)

参考 pyb.Pin & pyb.DAC.

from pyb import Pin, DAC

dac = DAC(Pin('X5'))
dac.write(120) # output between 0 and 255

UART (串口)

参考 pyb.UART.

from pyb import UART

uart = UART(1, 9600)
uart.write('hello')
uart.read(5) # read up to 5 bytes

SPI 总线

参考 pyb.SPI.

from pyb import SPI

spi = SPI(1, SPI.MASTER, baudrate=200000, polarity=1, phase=0)
spi.send('hello')
spi.recv(5) # receive 5 bytes on the bus
spi.send_recv('hello') # send and receive 5 bytes

I2C 总线

参考 pyb.I2C.

from pyb import I2C

i2c = I2C(1, I2C.MASTER, baudrate=100000)
i2c.scan() # returns list of slave addresses
i2c.send('hello', 0x42) # send 5 bytes to slave with address 0x42
i2c.recv(5, 0x42) # receive 5 bytes from slave
i2c.mem_read(2, 0x42, 0x10) # read 2 bytes from slave 0x42, slave memory 0x10
i2c.mem_write('xy', 0x42, 0x10) # write 2 bytes to slave 0x42, slave memory 0x10

CAN 总线

参考 pyb.CAN.

from pyb import CAN

can = CAN(1, CAN.LOOPBACK)
can.setfilter(0, CAN.LIST16, 0, (123, 124, 125, 126))
can.send('message!', 123)   # send a message with id 123
can.recv(0)                 # receive message on FIFO 0

板载加速度传感器

参考 pyb.Accel.

from pyb import Accel

accel = Accel()
print(accel.x(), accel.y(), accel.z(), accel.tilt())