2004

LEM - Instrument-Side USB+Ethernet Cards for Standalone Instrument

This card is built on the design of the already developed Ethernet+GPIB card. The card combines USB and Ethernet communication. Only one of the interfaces is active at a time. The USB part uses FTDI chip FT245B. The communication within the instrument is realized using UART interface and FPGA working as a state machine ensuring data transfers between FIFOs and the USB driver. The software driver for the interface cards was developed for the operating system MQX of the instrument. The driver is a part of the instrument firmware. The maximum transfer rate of this GPIB interface is 800 kB/sec. The card was developed in 2005.

Realization: Virtual Instrumentation division