dll class.globals
#include "stdafx.h"
#include "lib.h"
//#pragma data_seg("Shared")
HANDLE handle=NULL; //必须在定义的同时进行初始化!!!!
//#pragma data_seg()
//#pragma comment(linker, "/section:Shared,rws" )
int add(int x)
{
//CreateFile
switch(x)
{
case 0:
x=1;break;
case 1:
x=2;break;
case 2:
x=3;break;
case 3:
x=4;break;
case 4:
x=5;break;
default : ;
}
return x;
}
bool ComOpen(int x,CString c)
{
CString str;
// AfxMessageBox(c);
switch(x)
{
case 0:
str="COM1";break;
case 1:
str="COM2";break;
case 2:
str="COM3";break;
case 3:
str="COM4";break;
case 4:
str="COM5";break;
default : ;
}
HANDLE m_hCom;
DWORD dwError=0;
m_hCom = CreateFile("COM1", GENERIC_READ | GENERIC_WRITE, 0, NULL, OPEN_EXISTING, 0, NULL );
if(m_hCom==(HANDLE)-1)
{
AfxMessageBox("打开COM失败!");
return FALSE;
}
//设置com
DCB dcb;
GetCommState(m_hCom,&dcb);
CString s1;
s1.Format("%d",dcb.StopBits);
AfxMessageBox(s1);
dcb.BaudRate = 9600; //波特率为9600
dcb.ByteSize = 8; //数据位数为8位
dcb.Parity = NOPARITY; //偶校验
dcb.StopBits = 2; //两个停止位
if (!SetCommState(m_hCom, &dcb))
{
AfxMessageBox("串口设置出错1!");
}
else
{
AfxMessageBox("成功了!");
}
dcb.fBinary = TRUE;
dcb.fParity = TRUE;
COMMTIMEOUTS TimeOuts;
//设定读超时
TimeOuts.ReadIntervalTimeout=MAXDWORD;
TimeOuts.ReadTotalTimeoutMultiplier=0;
TimeOuts.ReadTotalTimeoutConstant=0;
//在读一次输入缓冲区的内容后读操作就立即返回，
//而不管是否读入了要求的字符。
//设定写超时
TimeOuts.WriteTotalTimeoutMultiplier=100;
TimeOuts.WriteTotalTimeoutConstant=500;
SetCommTimeouts(m_hCom,&TimeOuts); //设置超时
SetupComm(m_hCom, 1024, 1024);
PurgeComm(m_hCom,PURGE_RXABORT | PURGE_TXCLEAR | PURGE_RXCLEAR);
if (!SetCommState(m_hCom, &dcb))
{
AfxMessageBox("串口设置出错2!");
}
handle=m_hCom;
return true;
}
void out()
{
HANDLE h=handle;
CloseHandle(h);
}
CString GetComData(BYTE *x)
{
return "true";
}
CString SendDataToCom(CString c)
{
CString s1,s2;
BYTE cByte[1024] = {0};
BYTE c2[1024];
DWORD dwReadCount = 128;
DWORD dwWriteCount = 0;
LPTSTR lp;
for(int i =0; i < c.GetLength(); i++)
{
cByte[i] = c.GetAt(i);
}
// while(dwReadCount==128)
// {
WriteFile(handle,cByte,128, &dwReadCount, NULL);
// }
ReadFile(handle, c2, 128, &dwReadCount, NULL);
s2.Format("%d",dwReadCount);
AfxMessageBox("dwReadCount="+s2);
CloseHandle(handle);
lp=(LPTSTR)c2;
s1.Format("%s",c2);//转换
return lp;
}
----------------------------------------------------
.h
#ifndef LIB_H
#define LIB_H
extern "C" int __declspec(dllexport)add(int x);
//extern "C" bool __declspec(dllexport)ComOpen(int x);
extern "C" bool __declspec(dllexport)ComOpen(int x,CString c);
CString __declspec(dllexport)GetComData(BYTE * x);
extern "C" CString __declspec(dllexport)SendDataToCom(CString x);
extern "C" bool __declspec(dllexport)ComClose(int x);
void out();
#endif
------------------------------------------------------------------------------
.def
; comDll.def : Declares the module parameters for the DLL.
LIBRARY "comDll"
DESCRIPTION 'comDll Windows Dynamic Link Library'
EXPORTS
SendDataToCom
-----------------------------------------------------------------------------------------------------
maindialog
cpp
typedef bool(*lpAddFun)(int x,CString c);
typedef CString(*lpSendFun)(CString c);
HINSTANCE hDll;//DLL句柄
lpAddFun addFun;//函数指针
lpSendFun sendFun;
--------------------------
oninitdialog
hDll = LoadLibrary("..\\comDll\\Debug\\comDll.dll");
----------------------------
createfile
void CSCommTestDlg::OnButton_CreateFile()
{ CString str;
if (hDll != NULL)
{
addFun = (lpAddFun)GetProcAddress(hDll, "ComOpen");
if (addFun != NULL)
{
CString se;
GetDlgItemText(IDC_EDIT3,se);
addFun(m_combo1.GetCurSel(),se) ;
}
else
AfxMessageBox("为NULL，请检查CPP文件");
// FreeLibrary(hDll);
}
}
-----------------------------------------
sendtocom
void CSCommTestDlg::OnButton_sendtocom()
{
CString str;
if (hDll!= NULL)
{
sendFun = (lpSendFun)GetProcAddress(hDll, "SendDataToCom");
if (sendFun != NULL)
{
CString se;
GetDlgItemText(IDC_EDIT3,se);
str=sendFun(se) ;
}
else
AfxMessageBox("为NULL，请检查CPP文件");
// str.Format("%d",b);
m_edit2+=str;
UpdateData(false);
}
}
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