findtype.c

sdcc是为51等小型嵌入式cpu设计的c语言编译器支持数种不同类型的cpu

//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
//
//  findtype.c - Test module to find all devices of one type.
//      
//  Version: 2.00
// 
//----------------------------------------------------------------------
//
//
#include "ownet.h"

//----------------------------------------------------------------------
// Search for devices 
//
// 'portnum'  - number 0 to MAX_PORTNUM-1.  This number is provided to
//              indicate the symbolic port number.
//
// Returns: TRUE(1)  success, device type found
//          FALSE(0) device not found
//
int FindDevices(int portnum, uchar FamilySN[][8], int family_code, int MAXDEVICES)
{
   int NumDevices=0;
   int TotalDevices=0;
   
   // find the devices
   // set the search to first find that family code
   owFamilySearchSetup(portnum,family_code);

   // loop to find all of the devices up to MAXDEVICES
   NumDevices = 0;  
   do
   {
      // perform the search
      if (!owNext(portnum,TRUE, FALSE)) 
         break;
      owSerialNum(portnum,FamilySN[NumDevices], TRUE);   
      if (FamilySN[NumDevices][0] == family_code)
      {
         NumDevices++;
      } 
   }
   while (NumDevices < (MAXDEVICES - 1));

   // check if not at least 1 device
   return NumDevices;
}