SPI to I2C Protocol Conversion using Verilog

Serial communication protocols like SPI (Serial Peripheral Interface) and I2C (Inter-Integrated Circuit) are widely used in embedded systems for interfacing peripheral devices. However, the incompatibility between these protocols poses a challenge when devices using different communication standards must interact. This project presents the design and implementation of a protocol converter that bridges SPI and I2C interfaces using Verilog HDL. The converter accepts data from an SPI master and translates it into a format compatible with I2C slave devices, enabling seamless communication between heterogeneous components. The design includes SPI slave and I2C master modules, along with a control unit to manage data flow and timing synchronization. The system was synthesized and simulated using FPGA tools to validate correct operation and timing efficiency. This converter provides a cost-effective and hardware-efficient solution for mixed-protocol embedded applications.

Keywords— SPI,MOSI,I2C,SDA,SCL.