Gowin. Add IODELAY. #1398
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Gowin. Add IODELAY. #1398
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Input/Output delay (IODELAY) is programmable delay uint in IO block. This delay line is enabled before/after the IO pad and allows the signal to be delayed statically or dynamically during 0-127 stages each lasting from 18 to 30 picoseconds depending on the chip family. Signed-off-by: YRabbit <[email protected]>
gatecat
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Nov 29, 2024
himbaechel/uarch/gowin/pack.cc
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| CellInfo *iob = net_driven_by(ctx, di_net, is_iob, id_O); | ||
| if (iob != nullptr) { | ||
| NPNR_ASSERT(iob->bel != BelId()); | ||
| NPNR_ASSERT_MSG(di_net->users.entries() == 1, "IODELAY should be the only sink in the network.\n"); |
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This is better as a log_error, as it's something the user could conceivably trigger with a design
Signed-off-by: YRabbit <[email protected]>
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Input/Output delay (IODELAY) is programmable delay uint in IO block.
This delay line is enabled before/after the IO pad and allows the signal to be delayed statically or dynamically during 0-127 stages each lasting from 18 to 30 picoseconds depending on the chip family.