使用c#調(diào)用傳統(tǒng)32位api實(shí)現(xiàn)串口操作，整個(gè)結(jié)構(gòu)特別的簡單。接收數(shù)據(jù)只需要定義數(shù)據(jù)接收事件即可。
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using system;
using system.runtime.interopservices;
/// <summary>
/// (c)2003-2005 c2217 studio 保留所有權(quán)利
///
/// 文件名稱: ibmsserialport.cs
/// 文件id:
/// 文件說明:
/// 封裝動(dòng)態(tài)鏈接庫ibmsserialport.dll的功能，提供在.net環(huán)境中
/// 串口異步接收和發(fā)送數(shù)據(jù)的功能。
///
/// 當(dāng)前版本: 1.0
///
/// 作者: 鄧楊均
/// 創(chuàng)建日期: 2005-2-2
/// 最后修改日期: 2005-2-2
///
/// 歷史修改記錄:
///
/// </summary>
namespace ibms.tool.io
{
/// <summary>
/// 當(dāng)串口接收到數(shù)據(jù)時(shí)，會(huì)產(chǎn)生一個(gè)事件。
/// sprecvdataargs就是該事件的參數(shù)，參數(shù)中的recvdata包含接收到的數(shù)據(jù)。
/// 使用方法：
/// </summary>
public class sprecvdataargs:eventargs
{
/// <summary>
/// 接收到的數(shù)據(jù)組成的字節(jié)數(shù)組
/// </summary>
private byte[] recvdata;
/// <summary>
/// 構(gòu)造函數(shù),需要一個(gè)包含數(shù)據(jù)的byte[]作為初始化參數(shù)來實(shí)例化 sprecvdataargs
/// </summary>
/// <param name="recvdata">接收到的數(shù)據(jù)</param>
public sprecvdataargs(byte[] recvdata)
{
if( recvdata == null)
{
throw(new argumentnullexception());
}
this.recvdata = recvdata;
}
/// <summary>
/// 返回接收到的數(shù)據(jù)內(nèi)容
/// </summary>
public byte[] recvdata
{
get
{
return recvdata;
}
}
}
/// <summary>
/// 封裝動(dòng)態(tài)鏈接庫ibmsserialport.dll的功能，提供在.net環(huán)境中異步
/// 串口接收和發(fā)送功能。特別實(shí)現(xiàn)的是異步通過信號(hào)自動(dòng)接收數(shù)據(jù)的模式。
/// </summary>
public class ibmsserialport:idisposable
{
#region 平臺(tái)調(diào)用聲明代碼
/// <summary>
/// 聲明ibmsserialport.dll的ibms_openport函數(shù)
/// </summary>
/// <param name="nport">串口號(hào)</param>
/// <param name="nrate">波特率</param>
/// <returns></returns>
[dllimport("ibmsserialport.dll")]
public static extern intptr ibms_openport(int nport, int nrate);
/// <summary>
/// 聲明ibmsserialport.dll的ibms_close函數(shù)
/// </summary>
[dllimport("ibmsserialport.dll")]
public static extern void ibms_close( intptr port);
/// <summary>
/// 聲明ibmsserialport.dll的ibms_senddata函數(shù)
/// </summary>
/// <param name="data"></param>
/// <param name="ndatasize"></param>
/// <returns></returns>
[dllimport("ibmsserialport.dll")]
public static extern bool ibms_senddata( intptr port, byte[] data,int ndatasize);
/// <summary>
/// 聲明ibmsserialport.dll的ibms_setfunchandle函數(shù)
/// </summary>
/// <param name="handdatafunc"></param>
[dllimport("ibmsserialport.dll")]
public static extern void ibms_setfunchandle( intptr port, handlefunc handdatafunc);
#endregion
#region 定義字段
/// <summary>
/// 定義數(shù)據(jù)處理委托，作為api的函數(shù)指針傳入動(dòng)態(tài)鏈接庫
/// </summary>
public delegate void handlefunc(intptr pdata, int ndatasize);
/// <summary>
/// 定義數(shù)據(jù)接收事件的原型
/// </summary>
public delegate void recvdata(object sender,sprecvdataargs e);
/// <summary>
/// 定義數(shù)據(jù)接收事件
/// </summary>
public event recvdata onrecvdata;
/// <summary>
/// 串口處理接收數(shù)據(jù)的委托
/// </summary>
private handlefunc _handledatafunc;
/// <summary>
/// 串口的編號(hào),從1開始的整數(shù),最大255
/// </summary>
private int port;
/// <summary>
/// 串口所支持的波特率,必須是標(biāo)準(zhǔn)波特率之一
/// </summary>
private standerdrate rate;
/// <summary>
/// 串口當(dāng)前的打開狀態(tài)
/// </summary>
private bool openstatus=false;
/// <summary>
/// 串口句柄
/// </summary>
private intptr porthandle;
#region 定義標(biāo)準(zhǔn)的串口波特率
/// <summary>
/// 標(biāo)準(zhǔn)的波特率
/// </summary>
public enum standerdrate
{
r50=50,
r75=75,
r110=110,
r150=150,
r300=300,
r600=600,
r1200=1200,
r2400=2400,
r4800=4800,
r9600=9600,
r19200=19200,
r38400=38400,
r57600=57600,
r76800=76800,
r115200=115200
};
#endregion
#endregion
#region 定義方法
/// <summary>
/// 構(gòu)造函數(shù)
/// </summary>
public ibmsserialport()
{
porthandle = (intptr)0;
_handledatafunc = new handlefunc(ondllrecvdata);
}
/// <summary>
/// 打開串口
/// </summary>
/// <param name="nport">串口號(hào)</param>
/// <param name="nrate">波特率</param>
/// /// <exception cref="applicationexception">拋出應(yīng)用程序異常,包換錯(cuò)誤描述</exception>
public void open(int nport, standerdrate nrate)
{
if(nport > 255 || nport < 0)
{
throw(new argumentoutofrangeexception());
}
port = nport;
rate = nrate;
porthandle = ibms_openport( port, (int)rate );
if( (intptr)0 == porthandle )
{
throw( new applicationexception("打開串口失敗"));
}
//注冊(cè)函數(shù)指針
ibms_setfunchandle( porthandle, _handledatafunc );
openstatus = true;
}
/// <summary>
/// 關(guān)閉串口
/// </summary>
public void close()
{
if( openstatus )
{
ibms_close( porthandle);
}
openstatus = false;
}
/// <summary>
/// 發(fā)送數(shù)據(jù)
/// </summary>
/// <param name="senddata">數(shù)據(jù)內(nèi)容</param>
/// <exception cref="applicationexception">拋出應(yīng)用程序異常,包換錯(cuò)誤描述</exception>
public void senddata( byte[] data )
{
if( !openstatus )
{
throw( new applicationexception("串口沒有打開,發(fā)送數(shù)據(jù)失敗") );
}
if( !ibms_senddata( porthandle, data, data.length ) )
{
throw( new applicationexception("串口發(fā)送數(shù)據(jù)失敗") );
}
}
/// <summary>
/// 處理接收到的串口數(shù)據(jù)
/// </summary>
/// <param name="pdata">串口數(shù)據(jù)接收緩沖區(qū)首地址</param>
/// <param name="ndatasize">數(shù)據(jù)大小,一般數(shù)據(jù)大小不超過2k</param>
unsafe protected void ondllrecvdata(intptr punhandledata, int ndatasize)
{
int datasize= ndatasize ;
byte * pdata =(byte *) punhandledata;
byte[] data = new byte[datasize];
//復(fù)制數(shù)據(jù)到byte數(shù)組
for(int i=0; i<datasize; i++)
{
data[i]= pdata[i];
}
//激發(fā)事件
onrecvdata( this, new sprecvdataargs(data) );
}
#endregion
#region 定義屬性
/// <summary>
/// 返回當(dāng)前的串口號(hào)
/// </summary>
public int port
{
get
{
return port;
}
}
/// <summary>
/// 返回當(dāng)前串口的波特率
/// </summary>
public standerdrate rate
{
get
{
return rate;
}
}
/// <summary>
/// 返回當(dāng)前串口的狀態(tài)
/// </summary>
public bool openstatus
{
get
{
return openstatus;
}
}
#endregion
#region 非托管資源的及時(shí)釋放
/// <summary>
/// 因?yàn)榘朔峭泄艿馁Y源(占用系統(tǒng)串口),必須實(shí)現(xiàn)idisposable接口
/// 在使用完該類的時(shí)候,必須記得調(diào)用dispose(),回收系統(tǒng)資源
/// <example>
///
/// 方法1
/// {
/// serialport port =new serialport();
/// ...
/// //在try-catch-finaly的finaly中釋放資源
///
/// port.dispose();
/// }
///
/// 方法2
/// using( serialport port = new serialport())
/// {
/// ...
/// }
/// 變量超出作用域時(shí)會(huì)自動(dòng)調(diào)用其dispose()方法
///
/// </example>
/// </summary>
~ibmsserialport()
{
dispose( false );
}
protected virtual void dispose( bool disposing )
{
if( disposing )
{
//清理托管的對(duì)象
}
//清理非托管的資源
close();
}
#region idisposable 成員
public void dispose()
{
// todo: 添加 serialport.dispose 實(shí)現(xiàn)
dispose( true );
gc.suppressfinalize(this);
}
#endregion
#endregion
}
}
