在论坛中经常有人提出关于研华工业用控制板卡的VC编程(www.cppentry.com)方法。此类板卡编程(www.cppentry.com)方法比较复杂，根据说明书上面说明我们可以采用两种编程(www.cppentry.com)方法，一种是自己编写控制各种寄存器代码进行数据的采集和输出，另外一种就是利用他封装的DLL的方法访问相应的函数进行完成。
为了节省时间提高开发效率，当然使用第二种方法了.我们可以根据研华光盘里面提供的例子进行修改就可以完成了.
1:A/D板编程(www.cppentry.com)实例(型号:PCL1754，通道:64)
//定义一个结构体变量保存64通道的DI信息
struct tagSYSTEMSTATE
{
int nState;//DI状态
BOOL bState;//是否为数字量接点
};
//初始化里面启动线程进行板卡的采集工作
void CMy11View::OnInitialUpdate()
{
CView::OnInitialUpdate();
m_Info = new tagSYSTEMSTATE[64];
for(int i=0;i<64;i++)
{
m_Info[i].nState = 0;
m_Info[i].bState = FALSE;
}
unsigned int nDummy;
m_pThread=(HANDLE) _beginthreadex(NULL，0，Main_Thread_DI，this，CREATE_SUSPENDED，&nDummy);//开辟DI线程
if (!m_pThread)
TRACE(_T(" Couldn't start a thread\n"));
else
ResumeThread(m_pThread);
}
//转线程进行采集的循环工作
UINT WINAPI CMy11View::Main_Thread_DI(LPVOID pParam)//控制DI线程
{
CMy11View * pView=(CMy11View *)pParam;
while(1)
{
pView->ptDeviceReadDIByte();
pView->nVal++;
pView->ShowMsg();
Sleep(10);
}
return 0;
}
//下面是调用DLL进行信号采集工作
void CMy11View::ptDeviceReadDIByte()
{
SHORT gnNumOfDevices;
LONG DriverHandle = (LONG)NULL;
USHORT gwChannel;
static PT_DioReadPortByte ptDioReadPortByte;
USHORT gwValue;
gnNumOfDevices = 1;
DRV_DeviceOpen(gnNumOfDevices，//板号0；
(LONG far *)&DriverHandle);
for(gwChannel = 0; gwChannel < 8;gwChannel ++)
{
ptDioReadPortByte.port = gwChannel;//////////0-7通道号
ptDioReadPortByte.value = (USHORT far *)&gwValue;
DRV_DioReadPortByte(DriverHandle，
(LPT_DioReadPortByte)&ptDioReadPortByte);
gwValue=gwValue&0x00ff;/////////////////
for(int j=0;j<8;j++)
{
if( (gwValue & (1<<j)) >0)
m_Info[gwChannel*8+j].nState = 1;
else
m_Info[gwChannel*8+j].nState = 0;
}
}
DRV_DeviceClose((LONG far *)&DriverHandle);
}
//下面将个通道点状态在界面输出，这里各位可以根据实际情况进行修改
void CMy11View::ShowMsg()
{
CDC *pDC;
pDC = GetDC();
CRect rect;
GetClientRect(&rect);
CString strText;
CBrush pNewBrush，*pOldBrush;
pNewBrush.CreateSolidBrush(RGB(128，128，255));
pOldBrush=pDC->SelectObject(&pNewBrush);
pDC->FillRect(&rect，&pNewBrush);
COLORREF *oldCol;
oldCol=(COLORREF *)pDC->SetTextColor(RGB(255，0，0));
pDC->SetBkColor(RGB(128，128，255));
pDC->TextOut(10，10，"采集模拟点显示信息：");
strText.Format("线程采集程序运行了%d次"，nVal);
pDC->TextOut(10，35，strText);
for(int i=0;i<64;i++)
{
strText.Format("第%.2d个结点的信息是：%d"，i+1，m_Info[i].nState);
int nHeight= (i/4)*25;
int nWidth = (i%4)*180;
pDC->TextOut(10+nWidth，70+nHeight，strText);
}
pDC->SelectObject(&oldCol);
pDC->SelectObject(&pOldBrush);
pNewBrush.DeleteObject();
pDC->DeleteDC();
}
//到此，DI输入编程(www.cppentry.com)基本结束，输出方法类似，这里不在进行叙述了. |
程序模拟演示界面可以见下:
//AD大致情况入DI，相应的主要不同在于板卡的采集程序，大致见下:
void CADDemoView::ptDeviceReadADByte()
{
USHORT gwChannel = 0; // input channel
float gwValue;
SHORT gnNumOfDevices;
static PT_AIConfig ptAIConfig; // structure for AIConfig table
static PT_AIVoltageIn ptAIVoltageIn; // structure for AIVoltageIn table
static PT_DeviceGetFeatures ptDevFeatures;
static DEVFEATURES DevFeatures; // structure for device features
gnNumOfDevices = 0;
DRV_DeviceOpen(gnNumOfDevices，//板号0；
(LONG far *)&DriverHandle);
ptDevFeatures.buffer = (LPDEVFEATURES)&DevFeatures;
ptDevFeatures.size = sizeof(DEVFEATURES);
DRV_DeviceGetFeatures(DriverHandle，//句标市柄
(LPT_DeviceGetFeatures)&ptDevFeatures);
for(gwChannel = 0; gwChannel < 32;gwChannel ++)
{
Sleep(1);
ptAIVoltageIn.chan = gwChannel;
ptAIVoltageIn.gain = 0;
ptAIVoltageIn.TrigMode = 0; // internal trigger
ptAIVoltageIn.voltage = (FLOAT far *)&gwValue;
DRV_AIVoltageIn(DriverHandle，(LPT_AIVoltageIn)&ptAIVoltageIn);
m_Info[gwChannel].fState = gwValue;
}
DRV_DeviceClose((LONG far *)&DriverHandle);
} |
其实VC编程(www.cppentry.com)研华板卡不是一件很困难的事情，在他提供的光盘里面有VC的实例，我们可以根据实例进行修改就可以完成了.
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