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#define AD_Interval 1000    //采樣周期為 1000ms
#define  base   0x280          // A/D采樣板基地址
/*  base+k (k=1,2,…14)為A/D板各寄存器地址    */
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
#include 
int     i, j, k ,  AD_Status, idTimer;
int   AD_Data[8][16];         // A/D數(shù)據(jù)存儲單元 
int     DdeAdviseStatus=0;
char    buf[64], DDEbuf[2048];       //數(shù)據(jù)暫存緩沖器 
char    szAppName[]="PFBCdas";    //服務(wù)程序名
char    szDdeTopic[]="AD001";     //主題名 
char    szDdeItem[]="DATA";      // 數(shù)據(jù)項名
long FAR PASCAL _export MainWndProc(HWND, UINT, UINT, LONG) ;
long FAR PASCAL _export MainWndProc (HWND hwnd, UINT message, UINT 
                                  wParam, LONG lParam)    
//應(yīng)用程序功能函數(shù)   
     {
     ATOM        aAppName,aTopic;
     ATOM        aItem;
     GLOBALHANDLE        hDdeData;
     DDEDATA FAR *lpDdeData;
     static HWND hwndClient;
     switch (message)
        {       
     case WM_CREATE:
        idTimer=SetTimer(hwnd,NULL,AD_Interval,NULL); 
                         //打開定時器
        outportb(base+11,0x10);  //選擇軟件觸發(fā)方式
        outportb(base+9,1);      //選擇輸入信號放大倍數(shù)為10
        outportb(base+14,0);
        outportb(base+13,0);     //清A/D完成位
        outportb(base+10,0);    //選擇通道0
        return 0;
   case WM_TIMER:
        for(i=0;i<6;i++)
          for(j=0;j<16;j++)       //采樣點為6*16=96個
          {
           outportb(base+13,j);                  
           outportb(base+10,i);   
           outportb(base+12,0);     //啟動A/D轉(zhuǎn)換
           do AD_Status=inportb(base+5);
           while ((AD_Status&0x10)==0x10); 
//判轉(zhuǎn)換是否結(jié)束?                                                                 
AD_Data[i][j]=(inportb(base+5)&0x0f)*256+inportb(base+4); 
                /*  讀A/D轉(zhuǎn)換后的數(shù)字值  */
            }
           _strdate(buf);                 //取采樣日期
           strcpy(DDEbuf,buf);
           strcat(DDEbuf,",");
           _strtime(buf);                //取采樣時間
           strcat(DDEbuf,buf);
           strcat(DDEbuf,",");
           for(i=0;i<6;i++)
            for(j=0;j<16;j++)
            {
             char  temp[32];
             strcat(itoa(AD_Data[i][j],buf,10),",");
              /*各采樣數(shù)據(jù)之間以逗號分隔*/
             strcat(DDEbuf,buf);
             }
           if(DdeAdviseStatus!=0)      //如果建立了DDE服務(wù)
           {
           aItem = GlobalAddAtom (szDdeItem) ;
                       //添加DDE數(shù)據(jù)項為全局原子
           hDdeData = GlobalAlloc (GHND | GMEM_DDESHARE,
                         sizeof (DDEDATA) + strlen (DDEbuf)) ;
               /*給采樣數(shù)據(jù)分配全局內(nèi)存塊*/
           lpDdeData = (DDEDATA FAR *) GlobalLock (hDdeData) ;
           lpDdeData->fResponse = 0 ;
           lpDdeData->fRelease  = 1 ;
           lpDdeData->fAckReq   = 0 ;
           lpDdeData->cfFormat  = CF_TEXT ;
                          //采樣數(shù)據(jù)為文本格式
           lstrcpy ((LPSTR) lpDdeData->Value,DDEbuf) ;
               /*將采樣數(shù)據(jù)從緩沖器放至DDE內(nèi)存*/
           GlobalUnlock (hDdeData) ;
           if(!PostMessage(hwndClient,WM_DDE_DATA,hwnd,
              MAKELONG(hDdeData,aItem)))  //發(fā)送DDE數(shù)據(jù)
           {
            GlobalFree(hDdeData); 
                  //若發(fā)送失敗，則釋放資源
            GlobalDeleteAtom(aItem);        
             }
             }
            return 0;
   case WM_DDE_INITIATE:        //DDE初始化
          hwndClient=wParam;
          hdc=GetDC(hwnd);
          aAppName=GlobalAddAtom(szAppName);
          aTopic=GlobalAddAtom(szDdeTopic);
          if ((LOWORD (lParam) == NULL || LOWORD (lParam) == aAppName)
            && (HIWORD (lParam) == NULL || HIWORD (lParam) == aTopic))
          {           // 發(fā)送服務(wù)程序名和主題名
        SendMessage(hwndClient,WM_DDE_ACK,hwnd,
                       MAKELONG(aAppName,aTopic));
               } 
          else
          {
           GlobalDeleteAtom (aAppName) ;
           GlobalDeleteAtom (aTopic) ;
              }
           return 0 ;
   case WM_DDE_TERMINATE:     //關(guān)閉DDE服務(wù)
        hwndClient=wParam;      
        PostMessage (hwndClient, WM_DDE_TERMINATE, hwnd, 0L) ;
        return 0 ;
   case WM_DDE_ADVISE:        //建立DDE服務(wù)
        DdeAdviseStatus=1;           //已建立DDE服務(wù)標(biāo)志
        hwndClient=wParam;
        aItem=HIWORD(lParam);
        if(!PostMessage(hwndClient,  WM_DDE_ACK,  hwnd,
          MAKELONG(0x8000,aItem)))          //發(fā)送DDE應(yīng)答
        {
         GlobalDeleteAtom(aItem);
                }
         return 0;
   case WM_DESTROY:             //程序失敗處理
        PostQuitMessage (0) ;
        return 0 ;
           }
     return DefWindowProc (hwnd, message, wParam, lParam) ;
     }

PROCEDURE   getdata
PUBLIC  mchannel
mchannel = DDEInitiate('PFBCdas','AD001') 
&&建立客戶程序和服務(wù)程序間的通道 
IF   mchannel !=-1
  =DDEadvise(mchannel,'DATA','recdata',2)
                &&建立DDE熱連接，數(shù)據(jù)項為DATA
ENDIF
RETURN

PROCEDURE  recdata      &&用戶自定義函數(shù)
PARAMETERS  channel,action,item,data,format,status
PRIVATE   newdata
newdata=""
IF  action='ADVISE'        &&若連接成功
   newdata=DATA            &&將采樣數(shù)據(jù)傳遞至newdata
   do process with newdata      &&調(diào)用數(shù)據(jù)處理程序 
ELSE
   IF  action='TERMINATE'                       
        = DDETerminate(mchannel)   &&關(guān)閉通道
   ENDIF
ENDIF
RETURN

PROCEDURE    process
PARAMETER    newdata
PRIVATE  i,loc1,loc2
DIMENSION  gdata(98)
 * 從字符串 newdata中取采樣值
gdata(97)=CTOD(left(newdata,8))        &&取日期值
gdata(98)=SUBSTR(newdata,10,8)         &&取時間值
* 從字符串newdata的相鄰逗號間取采樣值，
                    并將采樣值轉(zhuǎn)化為毫伏值
FOR  i=3  TO  98
   loc1=ATC(",", newdata, (i-1))
   loc2=ATC(",", newdata, (i))
   gdata(i-2)=VAL(SUBSTR(newdata,(loc1+1),(loc2-loc1)))
                   *0.024414062
ENDFOR
IF  USED("onedata")
        SELECT  onedata
ELSE
        SELECT  0
USE  onedata  ALIAS  onedata
                    &&打開數(shù)據(jù)庫onedata
ENDIF
APPEND  FROM  ARRAY  gdata
               &&將數(shù)組gdata中的轉(zhuǎn)換數(shù)據(jù)添加到數(shù)據(jù)庫中 
RETURN