visa(7visa)

🌈 visa(7visa) — the whole vibe 💅

okay so bestie, welcome to visa, section 7visa, from the LibreVISA Programmers' Manual — and no, we're not talking about the credit card, we're talking about the Virtual Instrument Software Architecture, which is a whole ✨moment✨. sit down, grab a strawberry 🍓, and let's get into it.

📛 NAME

visa — Virtual Instrument Software Architecture. that's it. that's the name. iconic of it honestly 👑

🧚 SYNOPSIS

#include <visa.h>

that's the entire synopsis. one line. she's low maintenance, she's efficient, she ate 🎀

💖 DESCRIPTION

The Virtual Instrument Software Architecture gives you a generic interface for talking to test and measurement equipment. like, one interface for the whole squad of instruments, so you're not out here learning a different language for every single device. it's giving universal translator but for lab gear 🦋

🔌 Resource Names

Every device is identified by a resource name, and that name is doing a lot of heavy lifting tbh. it tells you:

• the type of connection being used,
• the location information,
• and the device type.

🍓 USB Devices

USB[bus]::manufacturer::product::serial[::type]

the manufacturer and product identifiers must be given as hexadecimal numbers prefixed with 0x. and listen — the serial number is mandatory, even if the device would be unique otherwise. yes, even then. no, you don't get to skip it. she said what she said 💅

🌐 Ethernet/VXI-11 Devices

TCPIP[interface]::host[::type]

short, sweet, and to the point. we love a minimal queen ✨

👑 Resource Manager

Access to resources is mediated through a resource manager. and technically? there could be multiple instances. but realistically? usually only the default resource manager gets used. main character energy, fr fr 🌸

A handle to the default resource manager can be obtained from the viOpenDefaultRM(3visa) function.

🔍 Finding Devices

What if you don't already know the resource name? no worries, bestie, the resource manager can be queried for a list of known devices by using the viFindRsrc(3visa) function.

That function returns a ViFindList object (along with the first known resource). then you pull the further resource names from the find list using viFindNext(3visa), and finally you free the list using viClose(3visa).

so the whole flow is: viFindRsrc(3visa) → viFindNext(3visa) → viClose(3visa). find, next, close. that's the trio. don't forget the last step or the list just sits there like an unread group chat 😭

pro tip from your girl: the order matters here. find, iterate, then close. skipping viClose(3visa) is not the slay you think it is 🙈

🫶 a lil sign-off

this page is LibreVISA, dated 29 January 2013 💜 that's the source and the version, bestie, right there at the bottom where the footer usually lives — but we folded it into a cute lil goodbye instead, because we're not boring here. go talk to some instruments. you got this. periodt 💅✨