Hardware-assisted Routing Circuit for Fault Tolerance of Reconfigurable Hardware
At present,the methodology of fault tolerance for reconfigurable hardware is to replace and reroute reconfigurable hardware resources,but it requires a long routing time.A hardware-assisted routing circuit supporting rapid fault tolerance of reconfigurable cell array is presented.The architecture is composed of two-dimensional hard-assisted routing modules,each module can read and write configuration memory of the programmable switch.When fault is detected,hardware-assisted routing circuit can rip up nets that need to reroute,and reroute ripped up nets instead of external software after resource relocated rapidly.The implementation and simulation of a 4-bit parallel multiplier circuit is presented.Experimental results show the hardware-assisted routing circuit can speed up ripping up nets and rerouting process greatly.