【RPi PICO】在ms_paint中绘画

#1

需要先刷入circuitpython固件，然后从adafruit绑定库中复制adafruit_hid到板子的lib目录。
将下面的代码保存到板子的code.py中并退出磁盘后重新插入。
再运行windows的画图软件（其它一些绘图软件也可能支持，例如PS），并切换到铅笔工具，用镊子短连GPIO16和GND，就会开始自动绘图了。


# Emulate mouse to draw Chord on the computer screen! by Hari Wiguna, Jan 2021

import time

import board

import digitalio

import usb_hid

from adafruit_hid.mouse import Mouse

import math

 

class Point:

    def __init__(self, xx, yy):

        self.x = xx

        self.y = yy

 

numNodes = 7

radius = 50

nodes = []

 

origin = Point(0, 0)

pen = Point(0, 0)

 

mouse = Mouse(usb_hid.devices)

 

class code:

    def __init__(self):

        self.btn = digitalio.DigitalInOut(board.GP16)

        self.btn.direction = digitalio.Direction.INPUT

        self.btn.pull = digitalio.Pull.UP

 

        # compute points

        for i in range(numNodes):

            a = math.pi * 2 * i / numNodes

            x = origin.x + math.cos(a) * radius

            y = origin.y - math.sin(a) * radius # minus because computer screen origin is top left

            nodes.append(Point(x,y))

 

    def moveto(self,p):

        global pen

        dx = p.x - pen.x

        dy = p.y - pen.y

        mouse.move(x=int(dx), y=int(dy))

        pen = p

        time.sleep(0.005)

 

    def plotto(self,p):

        mouse.press(Mouse.LEFT_BUTTON)

        self.moveto(p)

        mouse.release_all()

 

    def main(self):

        global pen

        while True:

            if self.btn.value == False:

                pen = Point(0,0)

                for i in range(numNodes-1):

                    for j in range(i+1, numNodes):

                        self.moveto(nodes[i])

                        self.plotto(nodes[j])

 

app = code()

app.main()

这个例子来自：https://hackaday.io/project/177200-pi-p ... n-ms-paint