串口源代码(串口通信源码)
admin 发布:2022-12-19 02:57 96
今天给各位分享串口源代码的知识,其中也会对串口通信源码进行解释,如果能碰巧解决你现在面临的问题,别忘了关注本站,现在开始吧!
本文目录一览:
android_studio手机蓝牙串口通信源代码
初涉android的蓝牙操作,按照固定MAC地址连接获取Device时,程序始终是异常终止,查了好多天代码都没查出原因。今天改了一下API版本,突然就成功连接了。总结之后发现果然是个坑爹之极的错误。
为了这种错误拼命查原因浪费大把时间是非常不值得的,但是问题不解决更是揪心。可惜我百度了那么多,都没有给出确切原因。今天特此mark,希望后来者遇到这个问题的时候能轻松解决。
下面是我的连接过程,中间崩溃原因及解决办法。
1:用AT指令获得蓝牙串口的MAC地址,地址是简写的,按照常理猜测可得标准格式。
2:开一个String adress= "************" //MAC地址, String MY_UUID= "************"//UUID根据通信而定,网上都有。
3:取得本地Adapter用getDefaultAdapter(); 远程的则用getRemoteDevice(adress); 之后便可用UUID开socket进行通信。
如果中途各种在getRemoteDevice处崩溃,大家可以查看一下当前的API版本,如果是2.1或以下版本的话,便能确定是API版本问题,只要换成2.2或者以上就都可以正常运行了~ 这么坑爹的错误的确很为难初学者。 唉·········· 为这种小trick浪费很多时间真是难过。
(另外有个重要地方,别忘了给manifest里面加以下两个蓝牙操作权限哦~)
uses-permission android:name="android.permission.BLUETOOTH"/uses-permission
uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/uses-permission
下面附上Android蓝牙操作中用固定MAC地址传输信息的模板,通用搜索模式日后再补删模板:
private BluetoothAdapter mBluetoothAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
private InputStream inStream = null;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); //这条是蓝牙串口通用的UUID,不要更改
private static String address = "00:12:02:22:06:61"; // ==要连接的蓝牙设备MAC地址
/*获得通信线路过程*/
/*1:获取本地BlueToothAdapter*/
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if(mBluetoothAdapter == null)
{
Toast.makeText(this, "Bluetooth is not available.", Toast.LENGTH_LONG).show();
finish();
return;
}
if(!mBluetoothAdapter.isEnabled())
{
Toast.makeText(this, "Please enable your Bluetooth and re-run this program.", Toast.LENGTH_LONG).show();
finish();
return;
}
/*2:获取远程BlueToothDevice*/
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
if(mBluetoothAdapter == null)
{
Toast.makeText(this, "Can't get remote device.", Toast.LENGTH_LONG).show();
finish();
return;
}
/*3:获得Socket*/
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Socket creation failed.", e);
}
/*4:取消discovered节省资源*/
mBluetoothAdapter.cancelDiscovery();
/*5:连接*/
try {
btSocket.connect();
Log.e(TAG, "ON RESUME: BT connection established, data transfer link open.");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
}
}
/*此时可以通信了,放在任意函数中*/
/* try {
outStream = btSocket.getOutputStream();
inStream = btSocket.getInputStream(); //可在TextView里显示
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Output stream creation failed.", e);
}
String message = "1";
byte[] msgBuffer = message.getBytes();
try {
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Exception during write.", e);
}
*/
通用搜索模式代码模板:
简洁简洁方式1 demo
作用: 用VerticalSeekBar控制一个 LED屏幕的亮暗。
直接上码咯~
package com.example.seed2;
import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.os.Bundle;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.UUID;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.content.DialogInterface;
import android.util.Log;
import android.view.KeyEvent;
import android.widget.Toast;
public class MetalSeed extends Activity {
private static final String TAG = "BluetoothTest";
private BluetoothAdapter mBluetoothAdapter = null;
private BluetoothSocket btSocket = null;
private OutputStream outStream = null;
private InputStream inStream = null;
private VerticalSeekBar vskb = null;
private static final UUID MY_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); //这条是蓝牙串口通用的UUID,不要更改
private static String address = "00:12:02:22:06:61"; // ==要连接的蓝牙设备MAC地址
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
this.vskb = (VerticalSeekBar)super.findViewById(R.id.mskb);
this.vskb.setOnSeekBarChangeListener(new OnSeekBarChangeListenerX());
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if(mBluetoothAdapter == null)
{
Toast.makeText(this, "Bluetooth is not available.", Toast.LENGTH_LONG).show();
finish();
return;
}
if(!mBluetoothAdapter.isEnabled())
{
Toast.makeText(this, "Please enable your Bluetooth and re-run this program.", Toast.LENGTH_LONG).show();
finish();
return;
}
}
private class OnSeekBarChangeListenerX implements VerticalSeekBar.OnSeekBarChangeListener {
public void onProgressChanged(VerticalSeekBar seekBar, int progress, boolean fromUser) {
//Main.this.clue.setText(seekBar.getProgress());
/* String message;
byte [] msgBuffer;
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
Log.e(TAG,"ON RESUME : Output Stream creation failed.", e);
}
message =Integer.toString( seekBar.getProgress() );
msgBuffer = message.getBytes();
try{
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e (TAG, "ON RESUME : Exception during write.", e);
} */
}
public void onStartTrackingTouch(VerticalSeekBar seekBar) {
String message;
byte [] msgBuffer;
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
Log.e(TAG,"ON RESUME : Output Stream creation failed.", e);
}
message =Integer.toString( seekBar.getProgress() );
msgBuffer = message.getBytes();
try{
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e (TAG, "ON RESUME : Exception during write.", e);
}
}
public void onStopTrackingTouch(VerticalSeekBar seekBar) {
String message;
byte [] msgBuffer;
try {
outStream = btSocket.getOutputStream();
} catch (IOException e) {
Log.e(TAG,"ON RESUME : Output Stream creation failed.", e);
}
message =Integer.toString( seekBar.getProgress() );
msgBuffer = message.getBytes();
try{
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e (TAG, "ON RESUME : Exception during write.", e);
}
}
}
@Override
public void onStart()
{
super.onStart();
}
@Override
public void onResume()
{
super.onResume();
BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address);
try {
btSocket = device.createRfcommSocketToServiceRecord(MY_UUID);
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Socket creation failed.", e);
}
mBluetoothAdapter.cancelDiscovery();
try {
btSocket.connect();
Log.e(TAG, "ON RESUME: BT connection established, data transfer link open.");
} catch (IOException e) {
try {
btSocket.close();
} catch (IOException e2) {
Log .e(TAG,"ON RESUME: Unable to close socket during connection failure", e2);
}
}
// Create a data stream so we can talk to server.
/* try {
outStream = btSocket.getOutputStream();
inStream = btSocket.getInputStream();
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Output stream creation failed.", e);
}
String message = "read";
byte[] msgBuffer = message.getBytes();
try {
outStream.write(msgBuffer);
} catch (IOException e) {
Log.e(TAG, "ON RESUME: Exception during write.", e);
}
int ret = -1;
while( ret != -1)
{
try {
ret = inStream.read();
} catch (IOException e)
{
e.printStackTrace();
}
}
*/
}
@Override
获取串口数据的JS源代码,一个小程序就行
function OpenPort()
{
var cmd_send = "";
var result = $('txtReceive').value;
var results = result.split(',');
for(var i=0;iresults.length;i++)
{
cmd_send += String.fromCharCode(eval(results[i]));
}
if(MSComm1.PortOpen==false)
{
MSComm1.PortOpen=true;
MSComm1.Output=cmd_send;//发送命令
}
else
{
window.alert ("已经开始接收数据!");
}
}
function ClosePort()
{
if(MSComm1.PortOpen==true)
{
MSComm1.PortOpen=false;
}
else
{
window.alert ("串口已经关闭!");
}
}
function SendMessage()
{
var cmd_send = "";
var result = $('txtReceive').value;
var results = result.split(',');
for(var i=0;iresults.length;i++)
{
cmd_send += String.fromCharCode(eval(results[i]));
}
if(MSComm1.PortOpen==false)
{
window.alert ("串口已经关闭!!");
}
else
{
MSComm1.Output=cmd_send;//发送命令
}
}
详见:
求采纳!!!!!!!!!
求vc 串口通信源码
我这边有,已经成功应用于项目中!
//送到窗口的消息 WPARAM 端口号
#define ON_COMM_RECEIVE WM_USER+2009
#define ON_COMM_ERROR WM_USER+2010
#define ON_COMM_CTS WM_USER+2011
#define ON_COMM_DSR WM_USER+2012
#define ON_COMM_BREAK WM_USER+2013
#define ON_COMM_TXEMPTY WM_USER+2014
#define ON_COMM_RING WM_USER+2015
#define ON_COMM_RLSD WM_USER+2016
// changed 2011.4.07 收到特定字符事件 而不是收到任何字符 EV_RXCHAR--EV_RXFLAG
#define DEFALUT_COM_MASK_EVENT EV_RXFLAG | EV_ERR | EV_CTS | EV_DSR | EV_BREAK | EV_TXEMPTY | EV_RING | EV_RLSD
class CCom
{
public:
//------------------------------Construction-----------------------------------
//第1个参数为是否在打开串口时启动监视线程, 第2个参数为IO方式 阻塞方式(0)/ 异步重叠方式(默认)
CCom(BOOL bAutoBeginThread = TRUE, DWORD dwIOMode = FILE_FLAG_OVERLAPPED);
virtual ~CCom();
//----------------------------------Operations----------------------------------
//打开串口 缺省 9600, 8, n, 1
BOOL Open(DWORD dwPort);
//打开串口 缺省 baud_rate, 8, n, 1
BOOL Open(DWORD dwPort, DWORD dwBautRate);
//打开串口, 使用类似"9600, 8, n, 1"的设置字符串设置串口
BOOL Open(DWORD dwPort, char* szSetStr);
//读取串口 dwBufferLength个字符到 Buffer 返回实际读到的字符数 可读任意数据
DWORD Read(LPVOID Buffer, DWORD dwBufLength, DWORD dwWaitTime = 10);
//读取串口 dwBufferLength - 1 个字符到 szBuffer 返回ANSI C 模式字符串指针 适合一般字符通讯
char* ReadString(char* szBuffer, DWORD dwBufferLength, DWORD dwWaitTime = 20);
//读串口 同步应用
DWORD ReadSync(LPVOID Buffer, DWORD dwBufferLength);
//写串口 可写任意数据 "abcd" or "\x0\x1\x2"
DWORD Write(LPVOID Buffer, DWORD dwBufferLength, DWORD dwWaitTime = 20); // changed 2011.4.1 增加了第三个默认参数
//写串口 写ANSI C 模式字符串指针
DWORD Write(const char* szBuffer);
//写串口 同步应用
DWORD WriteSync(LPVOID Buffer, DWORD dwBufferLength);
//写串口 szBuffer 可以输出格式字符串 包含缓冲区长度
DWORD Write(char* szBuffer, DWORD dwBufferLength, char* szFormat, ...);
//写串口 szBuffer 可以输出格式字符串 不检查缓冲区长度 小心溢出
DWORD Write(char* szBuffer, char* szFormat);
//关闭串口 同时也关闭关联线程
virtual void Close();
struct InnerLock
{
CCom* ptr;
InnerLock(CCom* p) : ptr(p)
{
ptr-Lock();
}
~InnerLock()
{
ptr-UnLock();
}
};
//锁定资源
void Lock()
{
::EnterCriticalSection(m_mutex);
}
void UnLock()
{
::LeaveCriticalSection(m_mutex);
}
//DTR 电平控制
BOOL SetDtr(BOOL OnOrOff)
{
return IsOpen()? EscapeCommFunction(m_hComHandle, OnOrOff? SETDTR : CLRDTR) !=0 : FALSE;
}
//RTS 电平控制
BOOL SetRts(BOOL OnOrOff)
{
return IsOpen()? EscapeCommFunction(m_hComHandle, OnOrOff? SETRTS : CLRRTS) != 0 : FALSE;
}
BOOL SetBreak(BOOL OnOrOff)
{
return IsOpen()? EscapeCommFunction(m_hComHandle, OnOrOff? SETBREAK : CLRBREAK) != 0 : FALSE;
}
//辅助线程控制 建监视线程
BOOL BeginThread();
//暂停监视线程
inline BOOL SuspendThread()
{
return IsThreadRunning()? ::SuspendThread(m_hThreadHandle) != 0xFFFFFFFF : FALSE;
}
//恢复监视线程
inline BOOL ResumeThread()
{
return IsThreadRunning()? ::ResumeThread(m_hThreadHandle) != 0xFFFFFFFF : FALSE;
}
//终止线程
BOOL EndThread(DWORD dwWaitTime = 100);
//----------------------------------Attributes----------------------------------
//判断串口是或打开
inline BOOL IsOpen() {return m_hComHandle != INVALID_HANDLE_VALUE;}
//获得串口句炳
HANDLE GetHandle() {return m_hComHandle;}
//获得串口序号
const int GetPortID() {return m_dwPort;}
//获得串口全名
const char* GetPortName() {return m_szComStr;}
//获得串口参数 DCB
DCB* GetState()
{
return IsOpen() ::GetCommState(m_hComHandle, m_DCB) == TRUE ? m_DCB : NULL;
}
//设置串口参数 DCB
BOOL SetState(DCB* pDCB = NULL)
{
return IsOpen() ? SetCommState(m_hComHandle, pDCB == NULL? m_DCB : pDCB) == TRUE : FALSE;
}
//设置串口参数:波特率,停止位,等 支持设置字符串 "9600, 8, n, 1"
BOOL SetState(char* szSetStr);
//设置串口参数:波特率,停止位,等
BOOL SetState(DWORD dwBautRate, DWORD dwByteSize = 8, DWORD dwParity = NOPARITY, DWORD dwStopBits = ONESTOPBIT);
//获得超时结构
LPCOMMTIMEOUTS GetTimeouts()
{
return IsOpen()::GetCommTimeouts(m_hComHandle, m_ComTimeOuts) == TRUE ? m_ComTimeOuts : NULL;
}
//设置超时
BOOL SetTimeouts(LPCOMMTIMEOUTS lpCO)
{
return IsOpen()? ::SetCommTimeouts(m_hComHandle, lpCO) == TRUE : FALSE;
}
//设置串口的I/O缓冲区大小
BOOL SetBufferSize(DWORD dwInputSize, DWORD dwOutputSize)
{
return IsOpen()? ::SetupComm(m_hComHandle, dwInputSize, dwOutputSize) == TRUE : FALSE;
}
//清除接受缓冲区
void ClearInputBuffer()
{
if(IsOpen())
PurgeComm(m_hComHandle, PURGE_RXABORT|PURGE_RXCLEAR);
}
//清除发送缓冲区
void ClearOutputBuffer()
{
if (IsOpen())
PurgeComm(m_hComHandle, PURGE_TXABORT|PURGE_TXCLEAR);
}
//关联消息的窗口句柄
inline void SetWnd(HWND hWnd)
{
assert(::IsWindow(hWnd));
m_hNotifyWnd = hWnd;
}
//设定发送通知, 接受字符最小值
inline void SetNotifyNum(DWORD dwNum)
{
m_dwNotifyNum = dwNum;
}
//线程是否运行
inline BOOL IsThreadRunning() {return m_hThreadHandle != NULL;}
//获得线程句柄
inline HANDLE GetThread()
{
return m_hThreadHandle;
}
//设置要监视的事件, 打开前设置有效
void SetMaskEvent(DWORD dwEvent = DEFALUT_COM_MASK_EVENT)
{
m_dwMaskEvent = dwEvent;
}
//获得读缓冲区的字符数
int GetInputSize()
{
COMSTAT Stat;
DWORD dwError;
return ::ClearCommError(m_hComHandle, dwError, Stat) == TRUE? Stat.cbInQue : (DWORD)-1L;
}
//Attributes
protected:
volatile DWORD m_dwPort; //串口号
volatile HANDLE m_hComHandle; //串口句柄
char m_szComStr[20]; //保存Com1类似的字符串
DCB m_DCB; //定义波特率,停止位,等
COMMTIMEOUTS m_ComTimeOuts; //超时结构
DWORD m_dwIOMode; //0,同步 默认 FILE_FLAG_OVERLAPPED 重叠I/O 异步
OVERLAPPED m_overlappedRead, m_overlappedWrite;
volatile HANDLE m_hThreadHandle; //辅助线程
volatile HWND m_hNotifyWnd; //通知窗口
volatile DWORD m_dwNotifyNum;//接受多少字节(=m_dwNotifyNum)发送通知消息
volatile DWORD m_dwMaskEvent; //监视的事件
volatile BOOL m_bRunFlag; //线程运行循环标志
BOOL m_bAutoBeginThread; //open() 自动BeginThread();
OVERLAPPED m_overlappedWait;
protected:
//初始化
virtual void Init();
//析构
virtual void Destroy();
//绑定串口
void BindCommPort(DWORD dwPort);
//打开串口
virtual BOOL OpenCommPort();
//设置串口
virtual BOOL SetUpPort();
//---------------------------------------threads callback-----------------------------------------------------
//线程收到消息自动调用, 如窗口句柄有效, 送出消息, 包含串口编号, 均为虚函数可以在基层类中扩展
virtual DWORD ThreadFunc();
virtual void OnReceive();
virtual void OnCts();
virtual void OnDsr();
virtual void OnRing();
virtual void OnRlsd();
virtual void OnBreak();
virtual void OnTxEmpty();
virtual void OnError();
private:
CCom(const CCom);
CCom operator = (const CCom);
CRITICAL_SECTION m_mutex;
#ifdef _MT
static UINT APIENTRY CommThreadProc(LPVOID lpPara)
#else
static DWORD WINAPI CommThreadProc(LPVOID lpPara)
#endif
{
return ((CCom*)lpPara)-ThreadFunc();
}
};
#endif
#endif // !defined(AFX_COM_H__5427C4C8_CC6C_4135_9607_AF8BF6C1C679__INCLUDED_)
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