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Configuration
Example
The following program segment demonstrates how to read the module
identification string and the configuration. The configuration integers are
bit manipulated using the C operator for bit shifting result = result <<1
(a one bit shift to the left).
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/** FUNCTION PROTOTYPES **/
void main (void);
void err_handler(ViSession vi, ViStatus x); /* VTL error routine */
void sys_err(ViSession resource); /* Checks for SCPI programming errors */
/** GLOBAL **/
ViStatus err;
ViSession defaultRM, cmd, dac;
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void main (void)
{
int i,num_chan,result = {0},config [6]={0};
char buf[256] = { 0 };
/*** Check the module identification ***/
err=viPrintf(dac, “*IDN?\n”); /* request id from the module */
err=viScanf(dac, “%t”, &buf); /* enter string returned */
printf (“Module is identified as a %s\n”, buf); /* print the result */
/*** Get the module configuration ***/
err=viPrintf(dac, “DIAG:CONF?\n”); /* request module configuration */
err=viScanf(dac, “%,6d”, &config); /* returns six integers */
/* Decode the first integer */
result=config[0]; /* Expansion board */
if (result < 7)
{
printf (“Module is a 16 channel device\n”);
num_chan = 16;
}
else
{
printf (“Module is an 8 channel device\n”);
num_chan=8;
}
42 Programming Examples Chapter 2