visa - Virtual Instrument Software Architecture
The Virtual Instrument Software Architecture provides a generic interface for
communication with test and measurement equipment.
Each device is identified by a resource name that specifies the type of
connection used, location information and the device type.
- USB Devices
The manufacturer and product identifiers must be given as
hexadecimal numbers prefixed with 0x. The serial number is
mandatory, even if the device would be unique otherwise.
- Ethernet/VXI-11 Devices
Access to resources is mediated through a resource manager; while technically
there could be multiple instances, usually only the default resource manager
A handle to the default resource manager can be obtained from the
If the resource name is not known in advance, the resource manager can be
queried for a list of known devices by using the viFindRsrc
This function returns a ViFindList
object (along with the first known
resource), and further resource names are then queried from the find list
(3visa) before finally freeing the list using