Design of Dual Master I2C Bus Controller and Interfacing it with DC Motor

Serial communication protocols are widely used in electronics in order to transfer data. In this paper, the interface between the FPGA (Basys 2 Spartan 3E) and the DC motor has been achieved by using Dual Master I2C bus controller. To implement dual master configuration, first of all single master slave I2C bus controller is developed and then using arbitration technique, this design has been extended to two master devices. Thus, dual master I2C bus technique has been implemented by using arbitration technique. The design is first simulated using ModelSim and then synthesised using Xilinx ISE design suite. Finally the synthesized design, obtained on FPGA, is interfaced with DC motor, which acts as a slave device for the masters. The direction of rotation of the DC motor has been controlled by the two masters.