Hi all: We have Roach2 Rev2 boards and experienced similar behavior with the Fault light. We have not used the FPGA at all yet, so cannot report on how it affects programming the FPGA.
We are seeing Fault LED (Red) ON sometimes, and merely cycling power using the "Power" switch on the board does not resolve it. We need to pull the plug to power it down and then put it back and power up. Is this a normal behavior? It would be helpful to know what can drive the FAULT LED to turn ON and what is the best way to resolve the fault. Thanks, Nimish On Tue, Oct 30, 2012 at 4:52 AM, Alec Rust <[email protected]> wrote: > Hi Kim, it sounds like your board needs the REV1 mods done. There is a > problem on rev1 boards where the PPC temperature monitor indicates an > incorrect temp fault which stops the FPGA from being programmed. The will > be solved by removing a resistor. > > Please do the following mods on your board: > Hi all, here is a list of mods that must be done to ROACH2 rev 1 boards: > > 1. Remove R270, R141, R142, R262 > 2. There is too much thermal relief on the power busses, wires must be > soldered in to bypass this thermal relief. Use AWG12 or similar wire (2mm > or 0.08" diameter). See attachments. > > Regards > Alec > > > On Tue, Oct 30, 2012 at 3:57 AM, Kim Guzzino <[email protected]> wrote: > >> Hello all, >> We are having problems with our Roach 2 and don't want to update the >> Borph/uboot yet. Occasionally we get a fault light and our fpga will not >> run until we power down (by pulling the plug) and then up. If we cycle >> power with the power button the fault light remains, even after loading >> the bof. >> Question, under what conditions is the fault light driven? >> That' it. >> Kim >> >> >> >> > -- Nimish Sane Center for Solar-Terrestrial Research New Jersey Institute of Technology University Heights Newark, NJ 07102-1982 USA Tel: (973) 642 4958 Fax: (973) 596 3617 [email protected]
