Simplifying the communication with I2C devices using LabVIEW and the PC's parallel port

At the moment, Inter-Integrated Circuit (I
²
C) is one of the most widely used protocols for serial data communication in embedded systems. The purpose of this paper is to show a simple solution to communicate with I
²
C devices using the PC's parallel port and LabVIEW graphical programming environment. First, a low-cost 2-wire interface and an associated I
²
C LabVIEW library are presented. Then, a number of sample applications involving different ICs are described.