Agilent Technologies InfiniiVision 5000 Series Programmer's Manual page 706

12
Programming Examples
}
/*
* save_waveform
* ------------------------------------------------------------------
* This function saves the waveform data from the get_waveform
* function to disk.
*/
void save_waveform(void)
{
}
/*
706
* specified with the ":WAVEFORM:SOURCE" command.
*/
viPrintf(vi, ":WAVEFORM:DATA?\n");
/* READ_WAVE_DATA - The wave data consists of two parts: the header,
* and the actual waveform data followed by an New Line (NL)
* character. The query data has the following format:
*
* <header><waveform data block><NL>
*
* Where:
*
* <header> = #800002048
*
* The "#8" may be stripped off of the header and the remaining
* numbers are the size, in bytes, of the waveform data block.
* The size can vary depending on the number of points acquired
* for the waveform which can be set using the ":WAVEFORM:POINTS"
* command. You may then read that number of bytes from the
* oscilloscope; then, read the following NL character to
* terminate the query.
*/
waveform_size = WAVE_DATA_SIZE;
/* Read waveform data. */
viScanf(vi, "%#b\n", &waveform_size, waveform_data);
if ( waveform_size == WAVE_DATA_SIZE )
{
printf("Waveform data buffer full: ");
printf("May not have received all points.\n");
}
else
{
printf("Reading waveform data... size = %d\n", waveform_size);
}
The data is saved to a file called "wave.dat".
FILE *fp;
fp = fopen("c:\\scope\\data\\wave.dat", "wb");
/* Write preamble. */
fwrite(preamble, sizeof(preamble[0]), 10, fp);
/* Write actually waveform data. */
fwrite(waveform_data, sizeof(waveform_data[0]), (int)preamble[2],
fp);
fclose(fp);
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide
/* Query waveform data. */
(this is an example header)