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| author | YRabbit <rabbit@yrabbit.cyou> | 2021-12-20 15:48:38 +1000 |
|---|---|---|
| committer | YRabbit <rabbit@yrabbit.cyou> | 2021-12-20 15:48:38 +1000 |
| commit | 5a76b3cb4d506c4920fc3d6b9aff935cbaa2987e (patch) | |
| tree | f12b583fcbf2021c38299ea8aa49a77360e6c3a6 /gowin/constids.inc | |
| parent | 62a3e093856063180526b7189d5e711a98036fa0 (diff) | |
| download | nextpnr-5a76b3cb4d506c4920fc3d6b9aff935cbaa2987e.tar.gz nextpnr-5a76b3cb4d506c4920fc3d6b9aff935cbaa2987e.tar.bz2 nextpnr-5a76b3cb4d506c4920fc3d6b9aff935cbaa2987e.zip | |
gowin: Add simplified IO cells processing
Some models have I/O cells that are IOBUFs, and other types (IBUFs and
OBUFs) are obtained by feeding 1 or 0 to the OEN input. This is done
with general-purpose routing so it's best to do it here to avoid
conflicts.
For this purpose, in the new bases, these special cells are of type IOBS
(IOB Simplified).
The proposed changes are compatible with bases of previous versions of
Apycula and do not require changing .CST constraint files.
Signed-off-by: YRabbit <rabbit@yrabbit.cyou>
Diffstat (limited to 'gowin/constids.inc')
| -rw-r--r-- | gowin/constids.inc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gowin/constids.inc b/gowin/constids.inc index 7de754fc..6a730d5d 100644 --- a/gowin/constids.inc +++ b/gowin/constids.inc @@ -358,6 +358,19 @@ X(IOBH) X(IOBI) X(IOBJ) +// simplified iobs +X(IOBS) +X(IOBAS) +X(IOBBS) +X(IOBCS) +X(IOBDS) +X(IOBES) +X(IOBFS) +X(IOBGS) +X(IOBHS) +X(IOBIS) +X(IOBJS) + // Wide LUTs X(MUX2_LUT5) X(MUX2_LUT6) |