The design of the external interface of a virtual instrument needs to consider multiple factors. Here are some areas that may be involved:
- Interface type: Choose different types of interfaces according to actual needs. For example, the computer's internal plug-in card interfaces include isa interface and pci interface, which are suitable for small and medium-sized test systems. Computer external general bus interfaces include enhanced parallel interface epp, extended capability interface ecp, universal serial bus usb and fire wire. These interfaces are suitable for different types of virtual instruments.
- Data transmission speed: Different interface types have different data transmission speeds, and you need to choose the appropriate interface according to actual needs.
- Stability: The external interface of the virtual instrument needs to be stable and reliable to ensure the accuracy and stability of the data.
- Compatibility: The interface chosen needs to be compatible with the virtual instrument's host, such as a computer or other embedded system.
- Size and layout: The size and layout of the external interface of the virtual instrument need to be reasonable to facilitate connection and operation.
- Cost: On the premise of meeting the needs, the cost of the interface needs to be considered and a cost-effective interface should be selected.
The external interface design of virtual instruments needs to be selected and designed according to actual needs to ensure the reliability, stability and compatibility of the interface. At the same time, attention needs to be paid to factors such as the size and layout of the interface, as well as cost.