www.pudn.com > wsc4c30.zip > FINDER.C

/* finder.c 
** 
** Windows 95/NT WIN32 console application. 
** 
**  Searches for modem, which must be connected 
**  to the serial port and tuned on. 
*/ 
 
#include  
#include  
#include  
 
#include "wsc.h" 
 
#define FIRST_PORT COM1 
#define LAST_PORT  COM4 
 
#define QUOTE 0x22 
 
char Temp[80]; 
 
/* trap WSC error codes */ 
 
int ErrorCheck(int Code, int Port) 
{if(Code<0) 
   {printf("ERROR %d",Code); 
    SioDone(Port); 
    exit(1); 
   } 
 return Code; 
} 
 
/* display error & exit */ 
 
void SayError(char *Msg) 
{printf("ERROR: %s: %d\n", Msg, GetLastError() ); 
 exit(1); 
} 
 
/*** main ***/ 
 
void main(void) 
{int  i; 
 int Port; 
 int Code; 
 DWORD TimeMark; 
 static char Expect[] = "OK";     /* expect OK */ 
 static int  Next = 0;            /* index into Expect[] */ 
 
 printf("\n*** Searching COM%d to COM%d for connected modem.\n\n", 
      1+FIRST_PORT, 1+LAST_PORT); 
 /* enter search loop */ 
 for(Port=FIRST_PORT;Port<=LAST_PORT;Port++) 
   {/* reset the port */ 
    Code = SioReset(Port,1024,512); 
    if(Code<0) continue; 
    /* found UART: set baud rate, DTR and RTS */ 
    SioBaud(Port, 19200); 
    SioDTR(Port,'S'); 
    SioRTS(Port,'S'); 
    /* modem should set DSR */ 
    ///SioPutc(Port,'\r'); 
    if(SioDSR(Port)==0) 
      {/* modem must set DSR */ 
       printf("COM%d: DSR is not set (DSR=0)\n",1+Port); 
       continue; 
      } 
    printf("COM%d: DSR is set, transmitting %cAT%c...\n",1+Port,QUOTE,QUOTE); 
    /* send AT */ 
    SioPutc(Port,'\r'); 
    Sleep(250); 
    SioPutc(Port,'A'); 
    Sleep(250); 
    SioPutc(Port,'T'); 
    Sleep(250); 
    SioPutc(Port,'\r'); 
    /* expect OK back within 2 seconds */ 
    Next = 0; 
    TimeMark = SioTimer() + 2000; 
    /*printf("\n[%lx:%lx]\n", SioTimer(), TimeMark);*/ 
    while(SioTimer() < TimeMark) 
      {/* any incoming over serial port ? */ 
       i = SioGetc(Port); 
       if(i>-1) 
         {/* got character */ 
          printf("%c",(char)i); 
          if((char)i==Expect[Next]) 
            {Next++; 
             if(Next==2) 
               {printf("\nModem found on COM%d\n",1+Port); 
                SioDone(Port); 
                exit(0); 
               } 
            } 
         } 
      } /* end while */ 
    /* no modem on this port */ 
    SioDone(Port); 
    printf("No response.\n"); 
   } /* end-for */ 
 printf("Done.\n"); 
} /* end main */