Hello, We're currently working on a design running on a Virtex4 SX35. That design uses most of the resources of the FPGA (around 80% of the slices and 50% or the BRAMs/multipliers). We're working on the AVNET SX35 kit with a VGA extension card and a sdram expension card. Depending of the datafiles we send, sometimes it completly deconfigure the FPGA ... done goes de-asserted and nothing is processing anymore ... But that behavior is not deterministric, sometimes it can process for one minute and then deconfigure, or sometimes it just can't even process 1 second without crashing ... Apparently the more "heavy" is the datastream, then faster it will crash. Anyone would have an idea of what's going on there ? Sylvain
Virtex 4 deconfiguring itself ...
Started by ●March 21, 2006
Reply by ●March 21, 20062006-03-21
Sylvain Munaut <SomeOne@SomeDomain.com> wrote:> Hello, > > We're currently working on a design running on a Virtex4 SX35. That > design uses most of the resources of the FPGA (around 80% of the slices > and 50% or the BRAMs/multipliers). We're working on the AVNET SX35 kit > with a VGA extension card and a sdram expension card. > > Depending of the datafiles we send, sometimes it completly deconfigure > the FPGA ... done goes de-asserted and nothing is processing anymore > ... > But that behavior is not deterministric, sometimes it can process for > one minute and then deconfigure, or sometimes it just can't even > process 1 second without crashing ... Apparently the more "heavy" is > the datastream, then faster it will crash. > > Anyone would have an idea of what's going on there ? > > > Sylvain >Sounds like your design may be drawing more current than the the power supplies can provide. YOu might try monitoring the FPGA supply voltages.
Reply by ●March 21, 20062006-03-21
Ray Andraka wrote:> Sylvain Munaut <SomeOne@SomeDomain.com> wrote: > > > Hello, > > > > We're currently working on a design running on a Virtex4 SX35. That > > design uses most of the resources of the FPGA (around 80% of the slices > > and 50% or the BRAMs/multipliers). We're working on the AVNET SX35 kit > > with a VGA extension card and a sdram expension card. > > > > Depending of the datafiles we send, sometimes it completly deconfigure > > the FPGA ... done goes de-asserted and nothing is processing anymore > > ... > > But that behavior is not deterministric, sometimes it can process for > > one minute and then deconfigure, or sometimes it just can't even > > process 1 second without crashing ... Apparently the more "heavy" is > > the datastream, then faster it will crash. > > > > Anyone would have an idea of what's going on there ? > > > > > > Sylvain > > > Sounds like your design may be drawing more current than the the power > supplies can provide. YOu might try monitoring the FPGA supply voltages.I was thinking along similar lines as well. -Isaac
Reply by ●March 22, 20062006-03-22