Agilent Technologies 86100A Service Manual download pdf (Page 68)

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Sample Programs

Sample C Programs

Generating a Service Request

The following function is demonstrated in the “gen_srq.c” sample program.

* Function name: create_SRQ

* Parameters: none

* Return value: none

* Description: This routine sends two illegal commands to the scope which will

* generate an SRQ and will place two error strings in the error queue. The scope

* ID is requested to allow time for the SRQ to be generated. The ID string

* will contain a leading character which is the response placed in the output

* queue by the interrupted query.

void create_SRQ ( )

{

char buf [256] = { 0 }; //read buffer for id string

int bytes_read = 0;

int srq_asserted;

/* Generate query error (interrupted query)*/

/* send legal query followed by another command other than a read query response */

write_IO (":CHANnel2:DISPlay?");

write_IO (":CHANnel2:DISPlay OFF");

/* Generate command error - send illegal header */

write_IO (":CHANnel:DISPlay OFF");

/* get instrument ID - allow time for SRQ to set */

write_IO ("*IDN?");

bytes_read = read_IO (buf,256L);

/* add NULL to end of string */

buf [bytes_read] = '\0';

printf ( "%s\n", buf);

srq_asserted = check_SRQ ( );

if ( srq_asserted )

srq_handler ( );

} /* end create_SRQ ( ) */

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Agilent Technologies 86100A Service Manual Page 68

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