Agilent Technologies InfiniiVision 5000 Series Programmer's Manual page 688

12
Programming Examples
}
/*
* save_waveform
* ------------------------------------------------------------------
* This function saves the waveform data from the get_waveform
* function to disk.
*/
void save_waveform(void)
688
printf("Preamble TYPE: %e\n", preamble[1]);
printf("Preamble POINTS: %e\n", preamble[2]);
printf("Preamble COUNT: %e\n", preamble[3]);
printf("Preamble XINCREMENT: %e\n", preamble[4]);
printf("Preamble XORIGIN: %e\n", preamble[5]);
printf("Preamble XREFERENCE: %e\n", preamble[6]);
printf("Preamble YINCREMENT: %e\n", preamble[7]);
printf("Preamble YORIGIN: %e\n", preamble[8]);
printf("Preamble YREFERENCE: %e\n", preamble[9]);
*/
/* QUERY_WAVE_DATA - Outputs waveform records to the controller
* over the interface that is stored in a buffer previously
* specified with the ":WAVEFORM:SOURCE" command.
*/
iprintf(id, ":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. */
iscanf(id, "%#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".
Agilent InfiniiVision 5000 Series Oscilloscopes Programmer's Guide
/* Query waveform data. */
(this is an example header)