DMYTERVC

DMYTERVC

Converts the DataMyte character count to an ASCII number

Windows specifics: all

Syntax
Details
See Also

Syntax

DMYTERVC (hex-number)

hex-number: specifies the 2-byte DataMyte character count in hexadecimal that is to be converted to anASCII number.

Details

The DMYTERVC functions helps you convert a DataMyte character count, which is a 2-byte hexadecimal number, to an ASCII number. This number represents the number of characters that DataMyte is transmitting. this number does not include the STX (start-of-transmission) character, the 2-byte character count characters, or the 2-byte checksum.

In the following example, the DMYTERVC function calculates the character count. Once the character count is know, it can be used to process the incoming data, such as separating the data into words and store those words in SAS variables.

data dmyte3;
   /* this is the start-of-transmission character       */
   stx='02'x;
   infile 'com1:' lrecl=1 recfm=f;
   input x $char1.;
   if x eq stx then
     do;
      input cc $char2.;
      datacnt=dmytervc(cc);
     end;
   /* The character count tells us how many characters  */
   /* are in the packet being sent from the data        */
   /* collector (DATANCT is number of characters        */
   /* calculated by the DMYTERVC function.              */
   do i = 1 to datacnt;
     index+1;
     input x $char1.;
     substr(str,index,1)=x;
   /* ...more data processing statements                */
   end;
run;

Some type of data you could expect in the packet include the data and time, identification information such as the name of the operator, and data values.

See Also

Reading Data Using DataMyte Processing

Chapter Contents
Previous
Next
Top of Page