FPGA状态机在多路异步串口通信处理的实时优势

FPGA State-machine's Realtime Advantage at Multiple UART Communication Processing

摘要:

首先简要介绍了异步串口板的通常设计方法,并且提出了这些方法的不足之处,重点阐述了基于FPGA状态机和片上总线的新设计方案,以及该方案的技术优势,随后公布了基于该方案的异步串口板达到的性能指标;通过比较有关应答延迟的试验数据,提出了基于FPGA状态机和基于DSP处理器的异步串口板卡存在明显的处理速度差异问题,并基于两种设计方案,解释了形成差异的原因;最后提出了FPGA状态机对外部总线存储器或端口的访问管理性能大幅超越了任何一款DSP处理器的观点,并对同行提出了类似研发项目的设计建议。

Abstract:

Firstly, usual design methods of asynchronous serial interface board are introduced briefly, and defects of the methods are put forwarded, then the original design method and it's technical superiorities based on FPGA state-machine and bus-on-chip are expounded emphatically, then the performances of asynchronous serial interface board based on above design method are clarified. By comparing test data about time of response delay, obvious difference on processing rate between asynchronous serial interface boards based on FPGA state-machine and DSP processor are presented, and by comparing above two design methods, cause for the difference on processing rate are paraphrased. In the end, the opinion that FPGA state-machine is superior over any DSP processor evidently in performance to manage memorizer and port on exterior bus, and a suggestion of design method for similar equipment or system are put forward.