visa-rs

Safe Rust bindings for VISA(Virtual Instrument Software Architecture) library

Most documentation comes from NI-VISA Product Documentation

Requirements

This crate needs to link to an installed visa library, for example, NI-VISA.

You can specify path of visa64.lib file (or visa32.lib on 32-bit systems) by setting environment variable LIB_VISA_PATH.

On Windows and macOS, the default installation path will be added if no path is specified.

Example

Codes below will find the first Keysight instrument in your environment and print out its *IDN? response.

fn find_an_instr() -> visa_rs::Result<()>{
  use std::ffi::CString;
  use std::io::{BufRead, BufReader, Read, Write};
  use visa_rs::prelude::*;

  // open default resource manager
  let rm: DefaultRM = DefaultRM::new()?;

  // expression to match resource name
  let expr = CString::new("?*KEYSIGH?*INSTR").unwrap().into();

  // find the first resource matched
  let rsc = rm.find_res(&expr)?;

  // open a session to the resource, the session will be closed when rm is dropped
  let instr: Instrument = rm.open(&rsc, AccessMode::NO_LOCK, TIMEOUT_IMMEDIATE)?;

  // write message
  (&instr).write_all(b"*IDN?\n").map_err(io_to_vs_err)?;

  // read response
  let mut buf_reader = BufReader::new(&instr);
  let mut buf = String::new();
  buf_reader.read_line(&mut buf).map_err(io_to_vs_err)?;

  eprintln!("{}", buf);
  Ok(())
}

License: MIT OR Apache-2.0