whitequark
2a8e7bc6f2
vendor.xilinx_{7series,spartan6}: cleanup. NFC.
...
Eliminate some intermediate signals if they are not necessary.
Do not even return i, o, or t if the pin does not have them.
2019-06-17 15:47:56 +00:00
whitequark
8b34602d91
vendor.xilinx_{7series,spartan6}: connect FCDE and IOB directly.
...
Before this commit, in some cases there will be an inverter, which is
not allowed on an FDCE with IOB attribute set to true, as it will
interfere with packing.
2019-06-17 15:47:56 +00:00
Jean-François Nguyen
412781e0c3
vendor.xilinx_spartan6: implement DDR I/O buffers and inverters.
2019-06-13 15:13:31 +00:00
whitequark
efb2d773c3
build.{dsl,res,plat}: add PinsN and DiffPairsN.
2019-06-12 14:42:39 +00:00
Jean-François Nguyen
d5ba26b174
vendor.xilinx_spartan6: implement.
2019-06-07 08:58:41 +00:00
