Signametrics Corporation SMU2060, Руководство оператора

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Signametrics
102
DMM_OKAY Operation successfully terminated
Positive value > 100 Warning code.
Negative value
Error code.
Example
double Buffer[3000];
DMMSetAperture(0, APR_625us);
DMMSetReadInterval(0, 0.0); // Must be zero to use this function
DMMLongTrigger(0, 100, 30, 0.01 ); //expect 100 triggers, take 30 samples
// for each trigger, space samples by 10ms.
for(i=0 ; i < 3000 ; i++){ // read a total of iTrigCnt * iSampl samples.
while( ! DMMLongTrigRead(0, &r)); // Wait and read 3000 samples
Buffer[i] = r ;
}
DMMLongTrigRead
SMU2060  SMU2064  SMU2064-R 
Description
Read samples generated by DMMLongTrigger operation. Available with Option ‘R’
#include "SMU2060.h"
int DMMLongTrigRead ( int
nDmm,
double *
lpdReading
)
Remarks
This function does two things, it checks for the availability of a sample resulting from a
DMMLongTrigger operation, as well as reading it. If a sample is not ready a FALSE (0)
is retunred, if it is available it returns TRUE (1) as well as save the sample at a location
pointed to by
lpdReading
. Therefore, when ready is indicated the reading must be read
from this location and saved in a buffer. Failing to do so will result in this value being
overwritten by a subsequent sample. Use a tight loop to check for samples availability
and saving the sample at a safe location. All triggered samples must be read using this
function. The total number of samples is equal to
iTrigCnt
times
iSampl
. Look up these
parameters in the DMMLongTrigger() description above.
Parameter Type/Description
nDmm
int Identifies the DMM. DMMs are numbered starting with zero.
lpdReading
double * The location at which the reading is saved when TRUE is
returned.
Return Value
The return value is one of the following constants.
Value Meaning
TRUE A sample is ready. It is located at location
lpdReading
FALSE Not ready. A reading is available yet.
Positive value Warning code
Negative value Error code.
Example
double Buffer[3000];
DMMLongTrigger(0, 100, 30, 0.01 ); //expect 100 trigger pulses, take 30 samples
// for each trigger, space samples by 10ms.