基于FPGA和SPI接口DAC在某导航雷达前端控制中的应用

The Application in Front End Control of Navigational Radar Based on FPGA and DAC with SPI Interface

串行外设接口(Serial peripheral interface,SPI)是一种常用的标准接口,其使用简单方便而且占用系统资源少,应用相当广泛。AD5304是一款典型的具有SPI接口特性的DA转换器,文章给出了基于现场可编程门阵列(Field programmable gate array,FPGA)与AD5304转换器在某雷达前端控制中的一种应用方案,同时介绍了AD5304的特点和操作时序,阐述了FPGA内SPI接口时序设计,实践证明该方法简洁、有效。

SPI is a common used and standard serial for its convenience and saving system resource. AD5304 is communication interface, which is engineer＇s favorite a typical DA converter with SPI interface, This paper presents an application of a radar front-end control based on FPGA and AD5304 converter, At the same time in- troduces the characteristics and operation timing of the AD5304, and the design of SPI interface timing in FPGA is also detailed, The method is proved to be simple and effective in practice.