AFDX交换芯片虚拟验证关键技术研究

Research on Key Technology of AFDX Switch Chip Virtual Verification

AFDX(Avionics Full Duplex Switched Ethernet,航空全双工交换式以太网)网络为航电系统提供了一种确定、余度的数据交换服务,其基础和核心是交换芯片。在AFDX网络交换芯片整个研制过程中能否对其进行充分验证,是直接影响其投片成功的关键因素之一。文中结合AFDX网络交换芯片的设计过程,系统分析AFDX网络交换机及芯片的特点,制定出相应的验证策略,最后采用SystemVerilog验证语言、并基于OVM(Open Verification Method)概念构建了AFDX交换芯片的虚拟验证环境,缩短了验证平台的开发时间,极大提高了验证效率。

AFDX （Avionics Full Duplex Switched Ethemet） network provides an established,redundant data exchange service for the a- vionics system. Switch chip is the key component of AFDX network. In the whole development process of AFDX network switch chip,the ability to fully verify is direct impact on the final tape-out. Combined the design process of AFDX network switch chip, analyze the char- acteristics of the AFDX network switch and chip,develop corresponding verification strategy. At last,based on OVM,using the System- Verilog build the virtual verification environment for AFDX, shorten the development time of the verification platform,improving the ver- ification efficiency extremely.