基于DSP和FPGA的LVDS高速串行通信方案设计

Design of LVDS high speed serial communication scheme based on DSP and FPGA

电力电子驱动装置在电力系统中运用比较广泛,而在电力电子驱动装置控制系统设计过程中,因为既要对数据进行高速运算,又要对高频信号进行快速处理,因此,控制器通常都采用DSP和FPGA这样的组合框架。在设计过程中,DSP和FPGA的通信问题一直是一个重点研究问题。提出了一种应用SPI协议的串口通信方案,,利用LVDS线路驱动器/接收器实现DSP(TMFS28335)中内置的SPI模块和多个FPGA(XC6SLX9)上配置的SelectIO差分IO模块进行高速串行通信,并通过实验验证了该方案可以正确实现DSP与FPGA之间的串行通信,并具有通信速度高,抗干扰能力强,DSP和FPGA可以分离较远距离等优点。

Electric power electronic device is widely used in power system ,and in the process of design of power electronic drive device ,because it is not only to carry out high‐speed operation ,but also to carry on the fast processing of high frequency signal .Therefore ,the combination of DSP and FPGA is usually used .In the design process ,the communication problem of DSP and FPGA has been a focus of research .In this paper ,a serial communication scheme is proposed ,which is based on SPI （LVDS） ,FPGA （IO） and SelectIO （XC6SLX9） .The DSP module is configured with SPI （TMFS28335） .The scheme has the advantages of high speed of communication ,strong anti‐interference ability , FPGA and DSP can be separated .