南京大学学报(自然科学版) ›› 2016, Vol. 52 ›› Issue (3): 542549.
陈 伟,司峻峰*,黄晓林,肇 莹,刘红星
Chen Wei,Si Junfeng*,Huang Xiaolin,Zhao Ying,Liu Hongxing
摘要: TMS320C6678是TI(Texas Instruments)推出的8核高性能DSP(Digital Signal Processor),其主频可高达1.25 GHz,然而其正常工作涉及复杂的辅助控制.C6678的EVM(Evaluation Module)提供了一种以FPGA(Field Programmable Gate Array)为核心的辅助控制系统方案.考虑到FPGA硬件成本和软件开发成本高,尝试设计了一种以单片机为核心的辅助控制系统.鉴于单片机的外部中断资源有限,为实现对诸多电源状态指示信号及复位信号的监控,提出了利用逻辑门的方案.又由于单片机与DSP电气特性不匹配,提出了利用单片机OD(OpenDrain)输出特性及电平转换芯片的方案.经过测试,该辅助控制系统能够满足C6678的所有要求,并最终应用到TMS320C6678的某系统中.
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