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SUBJECT [Circuit Cellar #234] The CtrlBox (Ethernet Control System I/F)
NAME WIZnet DATE 2010-01-08 HIT 8778
Issue #234 January 2010 ? Embedded Applications

The CtrlBox
An Ethernet Control System Interface

by Ralph Stirling

This well-designed motion control interface features a WIZnet W5100 that provides an interface between a Xilinx Spartan3 FPGA board and a host computer. The FPGA counts pulses from four quadrature shaft encoders and generates PWM for a motor amplifier. You can use the host PC to perform control calculations. Here the system is used in an inverted pendulum apparatus. p. 30

Keywords: Control interface, W5100, Spartan-3, FPGA, quadrature encoder, PWM, inverted pendulum, Ethernet, WIZ810MZ, PicoBlaze, DHCP, MATLAB

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