/***************************************************************************/
/* Example of Formatted Hex Dump                                           */
/*                                                                         */
/* BinToHex.c                                                              */
/*                                                                         */
/*  Version :   1.1                                                        */
/*                                                                         */
/*       By :   Julian Winpenny                                            */
/*                                                                         */
/*     Date :   8 Jan 2001                                                 */
/*                                                                         */
/*  Purpose :   Display data from buffer/string in hexadecimal format      */
/*              to an RS232 terminal device                                */
/*                                                                         */
/*  Revision history :                                                     */
/*                                                                         */
/*    Changes from version 1.                                              */
/*    renamed "rows" to "cols" in function  FormatedHexDump( )             */
/*                                                                         */
/*                                                                         */
/*                                                                         */
/***************************************************************************/

#define CR 0x0d


void main(void)
{
char c;

 char buffer[] = {'T','h','i','s',' ','i','s','a',' ','t','e','s','t','.' };


   for( c=0; c < 14; c++ )        // Display buffer as text
   {
      Putchar( buffer[c] );
   }
   Putchar( CR );                 // New line

   FormatedHexDump( buffer, 14 ); // Display buffer a Hexadecimal


   while(1)
   {
    // Wait here.......
   }


}

//**************************************************
// FormatedHexDump( char *buf, char len )
//
//
// Generate a formatted hex dump of a buffer
// or string.
//
// Input: *buf : pointer to buffer to display
//		   len : Number of bytes to dump
//
// Typical output to RS232 device...
//
// 6A,7B,09,98,8B,76,45,A8,00,78,67,C6,FF,FF,FF,00
// 00,01,02,09,89,F6,B7,C1,FF,00,04,00,00,FF,F3,00
//
// Note: Maximum buffer lengh 255
//
//**************************************************
void FormatedHexDump( char *buf, char len )
{

 char p;        // Index in buffer
 char Cols;     // Column counter


    Cols = 0;   // Reset Column counter
      p = 0;    // Index first byte to dump

                // Repeat for number of bytes required

    while( p < len )
    {

        BinToHex( buf[p] );    // Display as HEX
        p++;                   // Next byte to decode

        if ( Cols++ == 16 )    // New line after each 16 columns
        {
          PutChar( CR );
          Cols = 0;
        }
        else if ( p != len )   // If were not at the end of the buf
        {                      // and there is no new line
           PurChar(',');       // output a ','
	    }

    }

   PutChar( CR );              // Final new line

}


//*******************************************************************
// BinToHex( char )
//
// Convert a 8 bit binary number to Hexadecimal ASCII representation
// ( 2 ASCII characters )
//
// Input: binary - byte to convert
//        e.g. 0x2A binary converts to 0x32 + 0x41
//
// Outputs to the RS232 port using SendChar(char)
//
// Note:
//       Outputs the result to the RS232 port.
//
//*******************************************************************
void BinToHex( char b )
{

 const char HexDigits[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};

   PutChar( HexDigits[ b >> 4 & 0x0f ] );  // Convert upper nibble to hex digit.
                                           // Right shift 4 bits and mask off upper nibble,
                                           // then index value in HexDigits array.

   PutChar( HexDigits[ b & 0x0f ] );       // Convert lower nibble to Hex digit
                                           // Mask off upper nibble,
                                           // then index value in HexDigits array.

}