Agilent Technologies InfiniiVision 7000A Series, Programmer'S Manual

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854 Agilent InfiniiVision 7000A Series Oscilloscopes Programmer's Guide
12
Programming Examples
* retrieve_waveform
* ------------------------------------------------------------------
* This function retrieves previously saved waveform data from a
* file called "wave.dat".
*/
void retrieve_waveform(void)
{
FILE *fp;
fp = fopen("c:\\scope\\data\\wave.dat", "rb");
/* Read preamble. */
fread(preamble, sizeof(preamble[0]), 10, fp);
/* Read the waveform data. */
fread(waveform_data, sizeof(waveform_data[0]), (int)preamble[2],
fp);
fclose(fp);
}
VISA Example in Visual Basic
To run this example in Visual Basic for Applications:
1
Start the application that provides Visual Basic for Applications (for
example, Microsoft Excel).
2 Press ALT+F11 to launch the Visual Basic editor.
3 Add the visa32.bas file to your project:
a Choose File>Import File... .
b Navigate to the header file, visa32.bas (installed with Agilent IO
Libraries Suite and found in the Program Files\VISA\winnt\include
directory), select it, and click
Open .
4 Choose Insert>Module .
5 Cut- and- paste the code that follows into the editor.
6 Edit the program to use the VISA address of your oscilloscope, and save
the changes.
7
Run the program.
'
' Agilent VISA Example in Visual Basic
' -------------------------------------------------------------------
' This program illustrates a few commonly-used programming
' features of your Agilent oscilloscope.
' -------------------------------------------------------------------
Option Explicit
Public err As Long ' Error returned by VISA function calls.
Public drm As Long ' Session to Default Resource Manager.
Public vi As Long ' Session to instrument.