485demo.cpp

英创386模块的RS485控制协议和函数,还有例程

#include <stdio.h>
#include <conio.h>
#include <ctype.h>
#include <string.h>
#include "rs485.h"

char InStr[1024];

int GetCOM_NUM( char* NumStr );

int main( int argc, char** argv )
{
   int  i, ii, i1, State, len, COM_NUM;
   char abyte;

   printf( "RS485 Demo\n" );

   if( argc > 1 )  COM_NUM = GetCOM_NUM( argv[1] );
   else            COM_NUM = COM3;

   InitUART( COM_NUM, 12 );
   InstallISR( COM_NUM );

   ii = 0;
   for( ; ; )
      {
      for( ; ; )
	 {
	 i1 = GetInputData( );
	 if( i1 == -1 ) break;
	 abyte = (char)i1;
	 PutOutputData( abyte );
	 printf( "%c", abyte );
	 ii++;
	 }
      if( (abyte=='!')&&(ii>0) )
	 {
	 StartSend( );
	 ii = 0;
	 }

      if( kbhit( ) ) { getch( ); break; }
      }

   UninstallISR( COM_NUM );
   return 0;
}

int GetCOM_NUM( char* NumStr )
{
   int i, len;

   len = strlen( NumStr );
   for( i=0; i<len; i++ )
      {
      NumStr[i] = toupper( NumStr[i] );
      }

   if( !strcmp( NumStr, "COM2" ) ) return COM2;
   if( !strcmp( NumStr, "COM3" ) ) return COM3;

   if( !strcmp( NumStr, "1" ) ) return COM2;
   if( !strcmp( NumStr, "2" ) ) return COM3;

   return COM3;
}