Implementation of the communication protocols SPI and I2C using a FPGA by the HDL-Verilog language

Abstract

Currently, the most used serial communication protocols to exchange information between different electronic embedded devices are the SPI and I2C. This paper describes the development and implementation of these proto- cols using a FPGA card. For the implementation of each protocol, it was taken into account different modes of operation, such as master/slave mode sending or pending data mode. For the implementation of the I2C protocol was neces- sary to perform a tri-state buffer, which makes a bidirectional data line for a successful communication between devices, allowing to take advantage of these sources provided by the FPGA. Verilog is a hardware description lan- guage better known as HDL and it was used in the work to implement and sim- ulate these communication protocols with the software version 14.7 of Xilinx ISE Design Suite.