【Mind+Python】无线控车
本项目使用两块Micro:bit,一块用USB线与PC机相连（Mind+Python模式下用Pinpong控制），一块安装在小车上，两者通过无线功能通信。
【制作小车】
使用“MiniQ 桌面机器人底盘”，Microbit加扩展板，从小风扇上拆下的3.7V锂电池。制作一个小车。
比较图
【特色硬件】
两个车灯，使用了“炫彩LED模块”
LED拥有七色炫光，无需编程，通电即可点亮。内置控制芯片，七种颜色随机闪烁，时快时慢，绚丽缤纷，五彩斑斓。并且模块支持级联控制，只需一个接口，即可控制所有LED，是打造环境，烘托气氛的理想佳品。简单而不失浪漫，低调而不失奢华。
【小车展示】
https://v.youku.com/v_show/id_XNTE5MjI2NzU0NA==.html
【Mind+Python程序】
为求稳定，Mind+使用版本1.7.0RC3，Pinpong库使用版本0.3.5
#-*- coding: UTF-8 -*-
# MindPlus
# Python
import tkinter as tk
from tkinter import *
from PIL import Image, ImageTk#图像控件
import time
from pinpong.board import Board
from pinpong.extension.microbit import MBWireless
Board("microbit").begin()#初始化，选择板型和端口号，不输入端口号则进行自动识别
micro = MBWireless()
micro.set_wireless_channel(7) #设置无线频道为7
micro.open_wireless() #打开无线通信
# 事件回调函数
#定义函数，向物联网发送相应控制指令
def forward():#前进
micro.send_wireless("A") #通过无线通信发送
def back():#后退
micro.send_wireless("B") #通过无线通信发送
def left():#左转
micro.send_wireless("C") #通过无线通信发送
def right():#右转
micro.send_wireless("D") #通过无线通信发送
def stop():#停止
micro.send_wireless("E") #通过无线通信发送
def open_s():#风扇开
micro.send_wireless("F") #通过无线通信发送
def stop_s():#风扇关
micro.send_wireless("G") #通过无线通信发送
def light_open():#双闪开
micro.send_wireless("H") #通过无线通信发送
def light_close():#双闪关
micro.send_wireless("I") #通过无线通信发送
#生成窗体，布置相应文本框和按钮
top = tk.Tk()
top.title('控制窗口')
top.geometry('900x600')
image_width = 900
image_height = 600
canvas = Canvas(top,bg = 'white',width = image_width,height = image_height )#绘制画布
canvas.pack()
img = Image.open('bg.jpg')
bg = ImageTk.PhotoImage(img)
bgid = canvas.create_image(0, 0, image=bg, anchor='nw')
canvas.place(x = 0,y = 0)
#产生标签文本背景透明效果
txtid=canvas.create_text(350,20, fill = 'red',font=("黑体", 35),anchor="nw")
canvas.insert(txtid,1,"无线控车")
E1 = Entry(top, bd =5)
E1.pack(side = RIGHT)
E1.place(x=100,y=100)
wx=20
hy=350
def setV():#设置车速
val=int(E1.get())
if val>=30 and val<=200:
micro.send_wireless(E1.get()) #通过无线通信发送
#生成按钮，并指定相应功能
left = tk.Button(top,text='左转',height=2,width=15,command=left)
left.place(x=wx,y=hy+100)
forward = tk.Button(top,text='前进',height=2,width=15,command=forward)
forward.place(x=wx+150,y=hy)
right = tk.Button(top,text='右转',height=2,width=15,command=right)
right.place(x=wx+300,y=hy+100)
back = tk.Button(top,text='后退',height=2,width=15,command=back)
back.place(x=wx+150,y=hy+200)
stop = tk.Button(top,text='停止',height=2,width=15,command=stop)
stop.place(x=wx+150,y=hy+100)
wx=450
hy=350
open_s = tk.Button(top,text='开风',height=2,width=15,command=open_s)
open_s.place(x=wx+150,y=hy)
stop_s = tk.Button(top,text='关风',height=2,width=15,command=stop_s)
stop_s.place(x=wx+150,y=hy+200)
light_open = tk.Button(top,text='闪开',height=2,width=15,command=light_open)
light_open.place(x=wx,y=hy+100)
light_close = tk.Button(top,text='闪关',height=2,width=15,command=light_close)
light_close.place(x=wx+300,y=hy+100)
setV = tk.Button(top,text='设速',height=2,width=15,command=setV)
setV.place(x=wx+150,y=hy+100)
while True:
top.update()
top.after(100)
top.mainloop()
【小车代码】
Arduino C代码（同上）
/*!
* MindPlus
* microbit
*
*/
#include <Microbit_Motor.h>
#include <Microbit_Matrix.h>
#include <DFMicrobit_Radio.h>
// 动态变量
String mind_s_MingLing;
volatile float mind_n_CheSu;
// 函数声明
void onRadioReceive(String radio_message);
// 静态常量
const uint8_t bbcBitmap[] = {
{B01010,B10101,B10001,B01010,B00100}
};
// 创建对象
Microbit_Motor motorbit;
// 主程序开始
void setup() {
Radio.setCallback(onRadioReceive);
Radio.setGroup(7);
Radio.turnOn();
MMatrix.show(bbcBitmap);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
mind_n_CheSu = 30;
}
void loop() {
}
// 事件回调函数
void onRadioReceive(String radio_message) {
mind_s_MingLing = radio_message;
if ((mind_s_MingLing==String("A"))) {
motorbit.motorRun(M1, CW, mind_n_CheSu);
motorbit.motorRun(M2, CCW, mind_n_CheSu);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
}
if ((mind_s_MingLing==String("B"))) {
motorbit.motorRun(M1, CCW, mind_n_CheSu);
motorbit.motorRun(M2, CW, mind_n_CheSu);
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
}
if ((mind_s_MingLing==String("C"))) {
motorbit.motorStop(M1);
motorbit.motorRun(M2, CCW, mind_n_CheSu);
digitalWrite(12, HIGH);
digitalWrite(13, LOW);
}
if ((mind_s_MingLing==String("D"))) {
motorbit.motorStop(M2);
motorbit.motorRun(M1, CW, mind_n_CheSu);
digitalWrite(12, LOW);
digitalWrite(13, HIGH);
}
if ((mind_s_MingLing==String("E"))) {
motorbit.motorStop(ALL);
digitalWrite(12, LOW);
digitalWrite(13, LOW);
}
if ((mind_s_MingLing==String("F"))) {
digitalWrite(16, HIGH);
}
if ((mind_s_MingLing==String("G"))) {
digitalWrite(16, LOW);
}
if ((mind_s_MingLing==String("H"))) {
digitalWrite(12, HIGH);
digitalWrite(13, HIGH);
}
if ((mind_s_MingLing==String("I"))) {
digitalWrite(12, LOW);
digitalWrite(13, LOW);
}
if (((String(mind_s_MingLing).length())>1)) {
mind_n_CheSu = (String(mind_s_MingLing).toInt());
MMatrix.print(mind_s_MingLing);
}
}
【演示视频】
https://v.youku.com/v_show/id_XNTE5MjI2NzgyOA==.html
前进不走直线，问题原因：1、速度快2、两轮驱动
四大金刚啊{:6_203:}
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