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openXC7 / openXC7-snap

snap package for nextpnr PnR FPGA toolchain for Xilinx 7 series FPGAs, with Spartan7, Artix7, Zynq7 and Kintex7 support
BSD 3-Clause "New" or "Revised" License
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ODDR issues #2

Closed suarezvictor closed 1 year ago

suarezvictor commented 1 year ago

I receive this issue when using ODDR

ERROR: Failed to route arc 0 of net '$abc$10147$iopadmap$vga_r[0]', from SITEWIRE/OLOGIC_X0Y78/OUTFF_Q to SITEWIRE/IOB_X0Y78/OUSED_OUT.

When using SDR it works, but also with previous version of nextpnr-xilinx (generating the image below) Vivado produces no issue.

Verilog code: https://gist.github.com/suarezvictor/ded5ce54e8533a6f2bf45d555113c114

image

hansfbaier commented 1 year ago

You need to regenerate the chipdb with the new toolchain version. The old chipdb contains the wrong output wire name SITEWIRE/OLOGIC_X0Y78/OUTFF_OQ instead of SITEWIRE/OLOGIC_X0Y78/OQ