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SCPI error checking is illustrated in the following program example. The
SCPI error routine is named sys_error. Errors found are reported to the
standard output device.
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/** FUNCTION PROTOTYPES **/
void main (void);
void err_handler(ViSession vi, ViStatus x); /* VTL error routine */
void sys_err(ViSession resource); /* SCPI error routine */
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/** GLOBAL **/
ViStatus err;
ViSession defaultRM, cmd, dac;
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void main (void)
{
/*** Open the resource manager, command module, and dac sessions ***/
viOpenDefaultRM (&defaultRM);
viOpen (defaultRM, CMD_ADDRESS, VI_NULL, VI_NULL, &cmd);
viOpen(defaultRM, DAC_ADDRESS, VI_NULL, VI_NULL, &dac);
/*** Set the timeout for the dac ***/
viSetAttribute(dac, VI_ATTR_TMO_VALUE, 10000); /* 10 second timeout */
err=viPrintf(dac, “*RST\n”); /* reset the dac */
if(err < VI_SUCCESS) err_handler(dac, err); /* VTL error check */
sys_err (dac); /* SCPI error check */
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}
/***VTL Error handling function ***/
void err_handler (ViSession dac, ViStatus err)
{
char buf[1024]={0};
viStatusDesc(dac,err,buf);
printf(“VTL ERROR = %s\n”, buf);
return;
}
/***End of VTL error handler ***/
48 Programming Examples Chapter 2