Copper mountain Planar Tr1300/1, Programming Manual

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Appendix 3. Programming Examples
Example 1. Program Written in C
The following program shows the control over the instrument using the C language
with the VISA library. The instrument can be connected via Ethernet using VXI–11
protocol.
The instrument address is assigned in VISA Resource Name format in the command line
at the start of the program. For more detail on VISA Resource Name see the VISA
library documentation.
Program description:
1. Sets up the communication with the instrument.
2. Reads out and displays the instrument information string.
3. Sets some parameters of the instrument.
4. Triggers the measurement and waits for the sweep completion.
5. Reads out the measurement data and the frequency values at the measurement
points.
6. Displays the measurement data
// Example1.cpp
//
// VISA Header: visa.h (must be included)
// VISA Library: visa32.lib (must be linked with)
#include "stdafx.h"
#include "visa.h"
int main( int argc, char * argv[])
{
ViStatus status; // Error checking
ViSession defaultRM, instr; // Communication channels
ViUInt32 retCount; // Return count from string I/O
ViByte buffer[255]; // Buffer for string I/O
int temp;
int NOP = 21; // Number of measurement points
const int maxCnt = 100; // Maximum reading count
double Data[maxCnt*2]; // Measurement data array
double Freq[maxCnt]; // Frequency array
if (argc < 2)
{
printf( "\nUsage: Example4 <VISA address>\n\n" );
printf( "VISA address examples:\n" );
printf( " TCPIP::nnn.nnn.nnn.nnn::INSTR\n" );
printf( " TCPIP::devicename::INSTR\n" );
return –1;
}
status = viOpenDefaultRM(&defaultRM);