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一、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。

3.使车辆作为当今物联网中重要的一个节点发挥作用。

4.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。

5. 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。

（三）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：package com.example.seat;import android.support.v7.app.ActionBarActivity;import android.support.v7.app.ActionBar;import android.support.v4.app.Fragment;import android.os.Bundle;import android.os.Handler;import android.os.Message;import youtInflater;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.os.Build;import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import java.io.ObjectInputStream;import java.io.ObjectOutputStream;import .InetAddress;import .Socket;import .UnknownHostException;import android.app.Activity;import android.app.AlertDialog;import android.content.DialogInterface;import android.content.Intent;import android.os.Bundle;import android.view.KeyEvent;import android.view.View;import android.widget.Button;public class MainActivity extends ActionBarActivity {private Button Up = null;private Button Left = null;private Button Dowm = null;private Button Right = null;private Socket socket = null;private static final String HOST = "192.168.1.142";private static final int PORT = 10007;public void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(yout.activity_main);initControl();}private void initControl() {Up = (Button) findViewById(R.id.button1);Up.setOnClickListener(new ReceiverListener());}class ReceiverListener implements OnClickListener {protected String line;@Overridepublic void onClick(View v) {// TODO Auto-generated method stubnew Thread() {@Overridepublic void run() {try {Socket socket = new Socket(HOST, PORT);BufferedReader br = new BufferedReader(newInputStreamReader(socket.getInputStream()));line = br.readLine();br.close();} catch (UnknownHostException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}handler.sendEmptyMessage(0);}}.start();}}private Handler handler = new Handler() {@Overridepublic void handleMessage(Message msg) {super.handleMessage(msg);}};@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.main, menu);return true;}@Overridepublic boolean onOptionsItemSelected(MenuItem item) {// Handle action bar item clicks here. The action bar will// automatically handle clicks on the Home/Up button, so long// as you specify a parent activity in AndroidManifest.xml.int id = item.getItemId();if (id == R.id.action_settings) {return true;}return super.onOptionsItemSelected(item);}/*** A placeholder fragment containing a simple view.*/public static class PlaceholderFragment extends Fragment {public PlaceholderFragment() {}@Overridepublic View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) {View rootView = inflater.inflate(yout.fragment_main, container, false);return rootView;}}}界面代码：<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="/apk/res/android"package="com.example.seat"android:versionCode="1"android:versionName="1.0" ><uses-permissionandroid:name="android.permission.ACCESS_NETWORK_STA TE"/><uses-permission android: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><action android:name="android.intent.action.MAIN" /><category android:name="UNCHER" /></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-8from Raspi_PWM_Servo_Driver import PWMimport time, sockethost = ''port = 10007pwm = PWM(0x6F, debug=True)servoMin = 125 # Min pulse length out of 4096 , 0.5servoMax = 575 # Max pulse length out of 4096 , 2.3def setServoPulse(channel, pulse):pulseLength = 1000000 # 1,000,000 us per second pulseLength /= 60 # 60 Hzprint "%d us per period" % pulseLengthpulseLength /= 4096 # 12 bits of resolutionprint "%d us per bit" % pulseLengthpulse *= 1000pulse /= pulseLengthif(pulse>servoMax):pulse = servoMaxif(pulse<servoMin):pulse = servoMinpwm.setPWM(channel, 0, int(pulse))pwm.setPWMFreq(60) # Set frequency to 60 Hz pwm.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 'Server is running on port %d, press Ctrl-C to terminate it.' % port pulse_ud = 1.9pulse_lr = 1.9setServoPulse(0,pulse_ud)setServoPulse(1,pulse_lr)while True:clientsock, clientaddr = s.accept()clientfile = clientsock.makefile('rw', 0)ctrlinfo = clientfile.readline().strip()print 'Control info is %s.\n' % ctrlinfoif ctrlinfo == "up":pulse_ud += 0.1elif ctrlinfo == "down":pulse_ud -= 0.1elif ctrlinfo == "left":pulse_lr += 0.1elif ctrlinfo == "right":pulse_lr -= 0.1else:print "ERROR\n"setServoPulse(0,pulse_ud)setServoPulse(1,pulse_lr)clientfile.close()clientsock.close()2.硬件部分。