Wednesday, 2018-05-16

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mithrodigshadow: So, I'm trying to finish off the HLC generation for ice4021:36
mithrodigshadow: However, I'm running into an issue where I get the following;21:36
tpbTitle: Snippet | IRCCloud (at
mithroError 1: in check_rr_graph: node 5663 (IPIN) at (8,2) block=BLK_TL-PIO_R side=RIGHT has no fanin. <--21:37
digshadowmithro: if you run your rr_graph dumper, does it show those pins are fully connected21:38
digshadowie they to to a source and to some channels21:38
mithrodigshadow: Which is the rr_graph dumper?21:38
digshadowthe tool you wrote21:40
digshadowsorry it got moved out of the library to a dedicated module21:41
digshadowI should say21:41
mithrodigshadow: Yeah -- looks like I broke it...21:47
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tpbTitle: Small improvements to ice40 and rr_graph tools. by mithro · Pull Request #125 · SymbiFlow/symbiflow-arch-defs · GitHub (at
mithrodigshadow: I some how made *very* slow...22:19
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mithrodigshadow: Fixed the performance -- now trying to figure out what is going on23:33
mithroThis is confusing -- node 5663 seems to not be an IPIN?23:39
mithrojhol / daveshah: Does this make sense to you?23:49
mithroCannot route from BLK_TL-PIO_L.io_0_D_IN[0] (rr_node: 16 type: SOURCE ptc: 8 xlow: 1 ylow: 2) to BLK_TL-PIO_L.io_0_D_OUT[0] (rr_node: 28 type: SINK ptc: 0 xlow: 1 ylow: 3) to -- no possible path23:49

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