西门子Softnet驱动的成功开发

前段时间用西门子提供的Prodave5.5开发了基于YFIOServer的驱动程序，很可惜以太网方式它不支持，所以只好用西门子的softnet来开发相应的驱动了。

 

SoftNet的服务程序

目前采用的是同步方式的读写，可支持自恢复功能。

（采用异步方式初次读写可以成功，下次在读写时却失败，不是很明白！）

读写核心代码：

int fix_field_read(int Addr,int intNum,BYTE *bDataValue,long lngMode,int blockno)
{
 struct S7_READ_PARA read_para;
 int32 iRet;
 ord16 orderid=0;
 long lngTimeNum=0;
 long lngOK=1;

 read_para.access=S7_ACCESS_SYMB_ADDRESS;
    switch(lngMode)
 {
 case MODE_I:
  sprintf(read_para.var_name,"IB%d,%d",Addr,intNum);
  break;
 case MODE_Q:
  sprintf(read_para.var_name,"QB%d,%d",Addr,intNum);
  break;
 case MODE_M:
  sprintf(read_para.var_name,"MB%d,%d",Addr,intNum);
  break;
 case MODE_DB:
        sprintf(read_para.var_name,"DB%d,B%d,%d",blockno,Addr,intNum);
  break;
 }
 //IOF->ShowMessage(1,1,read_para.var_name,"--");

 iRet=s7_read_req(cp_descr,cp_cref,0,&read_para);
    if(iRet!=S7_OK)
 {
  //IOF->ShowMessage(1,1,read_para.var_name,"s7_read_req");
        return 1000;
 }
 do
 {
  iRet=s7_receive(cp_descr,&cp_cref,&orderid);
  switch(iRet)
  {
   case S7_READ_CNF:
    {
     //--------------------------------
     if(s7_get_read_cnf(( void *)0,(ord16 *)&intNum,(void *)bDataValue)!=S7_OK)
     {
      return 1001;
     }
                    lngTimeNum=IOD->Overtime+1;
     //----------------------------------
     lngOK=0;
    }
       break;
   default:
    Sleep(1);   //等待1ms
    break;
  }

 } while(lngTimeNum++<IOD->Overtime && iRet!=S7_ABORT_IND);

 return lngOK;
}

int fix_field_write(int Addr,int intNum,BYTE *bDataValue,long lngMode,int blockno)
{

 struct S7_WRITE_PARA write_para;
 int32 iRet;
 ord16 orderid=0;
 long lngTimeNum=0;
 long lngOK=1,i;

 write_para.access=S7_ACCESS_SYMB_ADDRESS;
    switch(lngMode)
 {
 case MODE_I:
  return 999;
  break;
 case MODE_Q:
  sprintf(write_para.var_name,"QB%d,%d",Addr,intNum);
  break;
 case MODE_M:
  sprintf(write_para.var_name,"MB%d,%d",Addr,intNum);
  break;
 case MODE_DB:
        sprintf(write_para.var_name,"DB%d,B%d,%d",blockno,Addr,intNum);
     //IOF->ShowMessage(1,1,write_para.var_name,"fix_field_write");
  break;
 }
    write_para.var_length=intNum;
    for(i=0;i<intNum;i++)
 {
       write_para.value[i]=bDataValue[i];
 }

 iRet=s7_write_req(cp_descr,cp_cref,0,&write_para,(void *)0);
    if(iRet!=S7_OK)
 {
        //IOF->ShowMessage(1,1,"Error:s7_write_req","fix_field_write");
        return 1000;
 }
 do
 {
  iRet=s7_receive(cp_descr,&cp_cref,&orderid);
  switch(iRet)
  {
   case S7_WRITE_CNF:
    {
     //--------------------------------
     if(s7_get_write_cnf()!=S7_OK)
     {
      return 1001;
     }
                    lngTimeNum=IOD->Overtime+1;
     //----------------------------------
     lngOK=0;
    }
       break;
   default:
    Sleep(1);   //等待1ms
    break;
  }

 } while(lngTimeNum++<IOD->Overtime && iRet!=S7_ABORT_IND);

 return lngOK;
}

注意：I和Q变量不知为什么，读写失败。

 

 

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