小弟第一次学习做串口通讯,不知道如何下手,请各位高手引小弟入门!谢谢!

时间:2022-01-29 16:15:18
是这样的,我想做一个串口通讯的小程序。在FORM上放置一个Timer,每隔1秒同时从Com1和Com5读取数据,然后分别追加写到1.txt和2.txt文件里去。

我的电脑是笔记本,其中Com1是自带的标准串口,而Com5是通过PCMCIA卡扩充的,Windows把它认为Com5。我用“超级终端”测试串口时,发现读取Com1的内容形式是“$gpvtg,n12.3,12.345N,32.165E,2.3,1”,Com5的内容形式是“$D,33.34”,那么我自己的程序读取这两个串口时,读出的会是什么样的内容呢?是二进制码还是ASCII码呢?另外我想用一些好的VCL控件来实现串口操作,不知道有什么好的控件,能在BCB6下可用?

能不能给个例子,多谢了!

7 个解决方案

#1


串口通讯参见:
http://www.csdn.net/expert/topic/853/853481.xml?temp=.6689264

#2


给你个网站,专门作串口通讯
http://roaringwind.best.163.com/scomm

#3


参见
http://www.csdn.net/expert/topic/834/834923.xml?temp=.4513666

#4


lj_csdn(大笨蛋) 代码已经收藏,呵呵。。。。不过我希望能用控件来完成,这样可以少动点脑筋,因为我无须花时间去研究串口通讯,只要会一些简单的就行了。

hbxtx(xy) 推荐的网站不错,谢谢。

#5


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#6


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+
end
sum -r/size 39782/5379

#7


以上两个帖子是我自己编的控件的源代码,直接打开 yb_comm.bpk 编译安装
这个 BCB 6.0 版本的

把以上两个帖子保存分别到两个文本文件,扩展名为 .xxe
用 WinRAR 3.0 解码、解压缩,得到源程序代码所有的文件

有什么问题再一起探讨
如果你对控件有所改进或修改,请给我一个 EMail 或其他任何方法让我知道


可以这样打开串口
//---------------------------------------------------------------------------
  try
   {
     YBComm321->PortNo = 2; //COM2
     YBComm321->Active = true;
   }
  catch(Exception &e)
   {
     Application->MessageBox(e.Message.c_str(),"错误信息",MB_OK|MB_ICONSTOP);
     Application->Terminate();
   }

在串口事件接收数据
//---------------------------------------------------------------------------
void __fastcall TForm1::YBComm321CommNotify(TObject *Sender, int NotifyType)
{
  if(NotifyType & EV_RXCHAR) //接收到数据
   {
     char Buffer[128];
     int n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
     while(n) //如果缓存的数据比 120 多,需要一直读到没有为止
      {
        Buffer[n]=0;
        Memo1->Text = Memo1->Text + Buffer;
        n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
      }
   }
}

也可以查询数据
//---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  char Buffer[128];
  int n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
  while(n) //如果缓存的数据比 120 多,需要一直读到没有为止
   {
     Buffer[n]=0;
     Memo1->Text = Memo1->Text + Buffer;
     n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
   }
}
//---------------------------------------------------------------------------

发送数据
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  YBComm321->Write(Memo2->Text.c_str(), Memo2->Text.Length());
}
//---------------------------------------------------------------------------


/*
控件说明:

Active: 打开、关闭串口,也得到当前串口是否打开了
  true  = 打开
  false = 关闭

PortNo: 整数值
  1 代表 COM1
  2 代表 COM2
  ...
  n 代表 COMn

Baud 的值: 根据需要修改
  CBR_110  CBR_19200
  CBR_300  CBR_38400
  CBR_600  CBR_56000
  CBR_1200 CBR_57600
  CBR_2400 CBR_115200
  CBR_4800 CBR_128000
  CBR_9600 CBR_256000
  CBR_14400

Parity (奇偶校验)的值: 一般用默认值
  EVENPARITY    偶
  MARKPARITY    Mark
  NOPARITY      无奇偶校验 (默认值)
  ODDPARITY     奇

StopBits (停止位)的值: 一般用默认值
  ONESTOPBIT    1 位 (默认值)
  ONE5STOPBITS  1.5 位
  TWOSTOPBITS   2 位

FlowControl (数据流控):
一般无 MODEM 用默认的 fcNone
有 MODEM 不能选择 fcNone
  fcNone          = 0, (默认值)
  fcRtsCts        = 3,
  fcXonXoff       = 4,
  fcTranXonXoff   = 5,
  fcRtsCtsXonXoff = 6,

AutoAnswer (自动应答):
使用 MODEM 硬件本身的自动应答功能
取值范围 0 - 255
  0 不自动应答
  1 - 255 表示电话响铃 AutoAnswer 次数后应答

InitModem() 初始化 MODEM
  如果有 MODEM 需要在 AfterOpen 事件 (每次 Active 之后) 调用这个方法

long __fastcall Read(void far *s, long n);
  读串口数据到地址 s,最多读 n 个字节
  返回值为实际读到的字节数

long __fastcall Write(const void far *s, long n);
  把地址 s 的数据写到串口发送出去,发送 n 个字节
  返回值为实际发送出去的字节数

void __fastcall PurgeRead(bool bAbort=false);
  清除读缓存,如果 bAbort 为 true,会强制中断当前正在进行的读操作

void __fastcall PurgeWrite(bool bAbort=false);
  清除写缓存,如果 bAbort 为 true,会强制中断当前正在进行的写操作

抛出的异常为 EComm32Error, 由 Exception 继承
  EComm32Error 有 ErrorCode 属性,可以判断错误类型,详见 .h 文件

*/

#1


串口通讯参见:
http://www.csdn.net/expert/topic/853/853481.xml?temp=.6689264

#2


给你个网站,专门作串口通讯
http://roaringwind.best.163.com/scomm

#3


参见
http://www.csdn.net/expert/topic/834/834923.xml?temp=.4513666

#4


lj_csdn(大笨蛋) 代码已经收藏,呵呵。。。。不过我希望能用控件来完成,这样可以少动点脑筋,因为我无须花时间去研究串口通讯,只要会一些简单的就行了。

hbxtx(xy) 推荐的网站不错,谢谢。

#5


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+
end
sum -r/size 25553/5500

#6


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+
end
sum -r/size 39782/5379

#7


以上两个帖子是我自己编的控件的源代码,直接打开 yb_comm.bpk 编译安装
这个 BCB 6.0 版本的

把以上两个帖子保存分别到两个文本文件,扩展名为 .xxe
用 WinRAR 3.0 解码、解压缩,得到源程序代码所有的文件

有什么问题再一起探讨
如果你对控件有所改进或修改,请给我一个 EMail 或其他任何方法让我知道


可以这样打开串口
//---------------------------------------------------------------------------
  try
   {
     YBComm321->PortNo = 2; //COM2
     YBComm321->Active = true;
   }
  catch(Exception &e)
   {
     Application->MessageBox(e.Message.c_str(),"错误信息",MB_OK|MB_ICONSTOP);
     Application->Terminate();
   }

在串口事件接收数据
//---------------------------------------------------------------------------
void __fastcall TForm1::YBComm321CommNotify(TObject *Sender, int NotifyType)
{
  if(NotifyType & EV_RXCHAR) //接收到数据
   {
     char Buffer[128];
     int n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
     while(n) //如果缓存的数据比 120 多,需要一直读到没有为止
      {
        Buffer[n]=0;
        Memo1->Text = Memo1->Text + Buffer;
        n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
      }
   }
}

也可以查询数据
//---------------------------------------------------------------------------
void __fastcall TForm1::Timer1Timer(TObject *Sender)
{
  char Buffer[128];
  int n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
  while(n) //如果缓存的数据比 120 多,需要一直读到没有为止
   {
     Buffer[n]=0;
     Memo1->Text = Memo1->Text + Buffer;
     n = YBComm321->Read(Buffer,120); //读到 n 个字节,n <= 120
   }
}
//---------------------------------------------------------------------------

发送数据
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  YBComm321->Write(Memo2->Text.c_str(), Memo2->Text.Length());
}
//---------------------------------------------------------------------------


/*
控件说明:

Active: 打开、关闭串口,也得到当前串口是否打开了
  true  = 打开
  false = 关闭

PortNo: 整数值
  1 代表 COM1
  2 代表 COM2
  ...
  n 代表 COMn

Baud 的值: 根据需要修改
  CBR_110  CBR_19200
  CBR_300  CBR_38400
  CBR_600  CBR_56000
  CBR_1200 CBR_57600
  CBR_2400 CBR_115200
  CBR_4800 CBR_128000
  CBR_9600 CBR_256000
  CBR_14400

Parity (奇偶校验)的值: 一般用默认值
  EVENPARITY    偶
  MARKPARITY    Mark
  NOPARITY      无奇偶校验 (默认值)
  ODDPARITY     奇

StopBits (停止位)的值: 一般用默认值
  ONESTOPBIT    1 位 (默认值)
  ONE5STOPBITS  1.5 位
  TWOSTOPBITS   2 位

FlowControl (数据流控):
一般无 MODEM 用默认的 fcNone
有 MODEM 不能选择 fcNone
  fcNone          = 0, (默认值)
  fcRtsCts        = 3,
  fcXonXoff       = 4,
  fcTranXonXoff   = 5,
  fcRtsCtsXonXoff = 6,

AutoAnswer (自动应答):
使用 MODEM 硬件本身的自动应答功能
取值范围 0 - 255
  0 不自动应答
  1 - 255 表示电话响铃 AutoAnswer 次数后应答

InitModem() 初始化 MODEM
  如果有 MODEM 需要在 AfterOpen 事件 (每次 Active 之后) 调用这个方法

long __fastcall Read(void far *s, long n);
  读串口数据到地址 s,最多读 n 个字节
  返回值为实际读到的字节数

long __fastcall Write(const void far *s, long n);
  把地址 s 的数据写到串口发送出去,发送 n 个字节
  返回值为实际发送出去的字节数

void __fastcall PurgeRead(bool bAbort=false);
  清除读缓存,如果 bAbort 为 true,会强制中断当前正在进行的读操作

void __fastcall PurgeWrite(bool bAbort=false);
  清除写缓存,如果 bAbort 为 true,会强制中断当前正在进行的写操作

抛出的异常为 EComm32Error, 由 Exception 继承
  EComm32Error 有 ErrorCode 属性,可以判断错误类型,详见 .h 文件

*/