嵌入式系统原理实验总结报告

嵌入式系统原理实验总结报告车辆座椅控制系统实验2014/5/23嵌入式系统原理实验总结报告技术性总结报告（一）题目：车辆座椅控制系统实验（二）项目概述：1.为了实现车辆座椅控制的自动化与智能化。2.方便用户通过智能手机与车载传感器之间的联动。使车辆作为当今物联网中重要的一个节点发挥作用。通过车辆座椅控制系统实验实现对嵌入式系统原理课程的熟练掌握与对嵌入式系统原理知识的深化记忆。加强本组学生对嵌入式系统原理的更深层次的理解与运用。技术方案及原理本次试验分为软件、硬件两个部分。1.软件部分。A.智能手机部分，包括通过智能手机对座椅的控制部分、手机所携带的身份信息部分。本部分软件使用Java编写，其程序部分为：主程序：packagecom.example.seat;importandroid.support.v7.app.ActionBarActivity;importandroid.support.v7.app.ActionBar;importandroid.support.v4.app.Fragment;importandroid.os.Bundle;importandroid.os.Handler;importandroid.os.Message;importandroid.view.LayoutInflater;importandroid.view.Menu;importandroid.view.MenuItem;importandroid.view.View;importandroid.view.View.OnClickListener;importandroid.view.ViewGroup;importandroid.os.Build;importjava.io.BufferedReader;importjava.io.IOException;importjava.io.InputStreamReader;importjava.io.ObjectInputStream;importjava.io.ObjectOutputStream;import.InetAddress;import.Socket;import.UnknownHostException;importandroid.app.Activity;importandroid.app.AlertDialog;importandroid.content.DialogInterface;importandroid.content.Intent;importandroid.os.Bundle;importandroid.view.KeyEvent;importandroid.view.View;importandroid.widget.Button;publicclassMainActivityextendsActionBarActivity{ privateButtonUp=null; privateButtonLeft=null; privateButtonDowm=null; privateButtonRight=null; privateSocketsocket=null;privatestaticfinalStringHOST="42";privatestaticfinalintPORT=10007;publicvoidonCreate(BundlesavedInstanceState){super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);initControl();}privatevoidinitControl(){Up=(Button)findViewById(R.id.button1);Up.setOnClickListener(newReceiverListener());}classReceiverListenerimplementsOnClickListener{protectedStringline; @OverridepublicvoidonClick(Viewv){//TODOAuto-generatedmethodstubnewThread(){@Overridepublicvoidrun(){try{Socketsocket=newSocket(HOST,PORT);BufferedReaderbr=newBufferedReader(newInputStreamReader(socket.getInputStream()));line=br.readLine();br.close();}catch(UnknownHostExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}catch(IOExceptione){//TODOAuto-generatedcatchblocke.printStackTrace();}handler.sendEmptyMessage(0);}}.start();}}privateHandlerhandler=newHandler(){@OverridepublicvoidhandleMessage(Messagemsg){super.handleMessage(msg);}};@OverridepublicbooleanonCreateOptionsMenu(Menumenu){//Inflatethemenu;thisaddsitemstotheactionbarifitispresent.getMenuInflater().inflate(R.menu.main,menu);returntrue;}@OverridepublicbooleanonOptionsItemSelected(MenuItemitem){//Handleactionbaritemclickshere.Theactionbarwill//automaticallyhandleclicksontheHome/Upbutton,solong//asyouspecifyaparentactivityinAndroidManifest.xml.intid=item.getItemId();if(id==R.id.action_settings){returntrue;}returnsuper.onOptionsItemSelected(item);}/***Aplaceholderfragmentcontainingasimpleview.*/publicstaticclassPlaceholderFragmentextendsFragment{publicPlaceholderFragment(){}@OverridepublicViewonCreateView(LayoutInflaterinflater,ViewGroupcontainer,BundlesavedInstanceState){ViewrootView=inflater.inflate(R.layout.fragment_main,container,false);returnrootView;}}}界面代码：<?xmlversion="1.0"encoding="utf-8"?><manifestxmlns:android="/apk/res/android"package="com.example.seat"android:versionCode="1"android:versionName="1.0"><uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STATE"/><uses-permissionandroid:name="android.permission.INTERNET"/><uses-sdkandroid:minSdkVersion="8"android:targetSdkVersion="19"/><applicationandroid:allowBackup="true"android:icon="@drawable/ic_launcher"android:label="@string/app_name"android:theme="@style/AppTheme"><activityandroid:name="com.example.seat.MainActivity"android:label="@string/app_name"><intent-filter><actionandroid:name="ent.action.MAIN"/><categoryandroid:name="ent.category.LAUNCHER"/></intent-filter></activity></application></manifest>B.车载座椅控制部分，包括控制系统对座椅的控制部分、对智能手机发出的控制信息的识别部分和对手机所携带身份信息的校验与储存部分。本部分软件使用Python编写，其程序部分为：#!/usr/bin/python#encoding=utf-8fromRaspi_PWM_Servo_DriverimportPWMimporttime,sockethost=''port=10007pwm=PWM(0x6F,debug=True)servoMin=125#Minpulselengthoutof4096,0.5servoMax=575#Maxpulselengthoutof4096,2.3defsetServoPulse(channel,pulse):pulseLength=1000000#1,000,000uspersecondpulseLength/=60#60Hzprint"%dusperperiod"%pulseLengthpulseLength/=4096#12bitsofresolutionprint"%dusperbit"%pulseLengthpulse*=1000pulse/=pulseLengthif(pulse>servoMax): pulse=servoMaxif(pulse<servoMin): pulse=servoMinpwm.setPWM(channel,0,int(pulse))pwm.setPWMFreq(60)#Setfrequencyto60Hzpwm.setPWM(0,0,servoMax)if__name__=='__main__':s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)s.bind((host,port))s.listen(3)print'Serverisrunningonport%d,pressCtrl-Ctoterminateit.'%portpulse_ud=1.9pulse_lr=1.9setServoPulse(0,pulse_ud)setServoPulse(1,pulse_lr)whileTrue:clientsock,clientaddr=s.accept()clientfile=clientsock.makefile('rw',0)ctrlinfo=clientfile.readline().strip()print'Controlinfois%s.\n'%ctrlinfoifctrlinfo=="up":pulse_ud+=0.1elifctrlinfo=="down":pulse_ud-=0.1elifctrlinfo=="left":pulse_lr+=0.1elifctrlinfo=="right":pulse_lr-=0.1else:print"ERROR\n"setServoPu