Design of SPI Interface Based on FPGA and PC/104 Bus

In order to meet the demand of realizing the control of programmed amplifiers with SPI interface by imbedded industrial-controlled computers through PC/104 bus,based on the research on communication protocol of PC/104 bus and SPI bus,this paper firstly introduces the structure and working time sequence of SPI bus and PC/104 bus,then proposes the interface design scheme for PC/104 bus converting to SPI bus based on FLASH framework of FPGA chip,provides the design idea for SPI-controlled state machine,makes simulation test by using ModelSim simulation software and finally verifies the validity and feasibility of this design scheme by simulation and experiment.