Alessandro Comodi

@daveshah1 Sure, I wanted to keep track of this here, and, before opening an issue upstream I wanted to debug what might be the cause of the failure (maybe is...

https://github.com/SymbiFlow/fpga-tool-perf/pull/161 enabled fasm2bels for nextpnr. However, there are errors that show up when running the litex-linux test: 1. channels.db seems to be incomplete as it miss some wires. In fact,...

New issue found when running with the updated fasm2bels library the blinky test: ``` WARNING: [Vivado 12-1023] No nets matched for command 'get_nets -of_object [get_pins {*CLBLM_R_X39Y73_SLICE_X60Y73_CARRY4/CO[3]}]'. ## set net [get_nets...

It appears that the COUT->CIN connection is there indeed by looking into the fasm output: ``` CLBLM_R_X39Y73.SLICEL_X1.DFF.ZINI CLBLM_R_X39Y73.SLICEL_X1.DFF.ZRST CLBLM_R_X39Y73.SLICEL_X1.DFFMUX.DX CLBLM_R_X39Y73.SLICEL_X1.FFSYNC CLBLM_R_X39Y73.SLICEL_X1.NOCLKINV CLBLM_R_X39Y73.SLICEL_X1.PRECYINIT.C0 CLBLM_R_X39Y73.SLICEM_X0.AFF.ZINI CLBLM_R_X39Y73.SLICEM_X0.AFF.ZRST CLBLM_R_X39Y73.SLICEM_X0.AFFMUX.AX CLBLM_R_X39Y73.SLICEM_X0.ALUT.DI1MUX.BDI1_BMC31 CLBLM_R_X39Y73.SLICEM_X0.ALUT.INIT[63:0] = 64'b1010101010101010101010101010101011001100110011001100110011001100 CLBLM_R_X39Y73.SLICEM_X0.AOUTMUX.XOR...

Actually the LOC should be in the XDC. For vpr-fasm2bels, carry chains slices are LOCed as follows: ``` set_property LOC SLICE_X45Y65 [get_cells *CLBLL_L_X28Y65_SLICE_X45Y65_CARRY4] set_property LOC SLICE_X45Y66 [get_cells *CLBLL_L_X28Y66_SLICE_X45Y66_CARRY4] set_property LOC...

After updating fpga-tool-perf to use the latest version of yosys I can now see two issues that block us from having nextpnr bitstreams run through fasm2bels: 1. BRAM sinks cannot...

> Of course what is worrying is the fact that the clocks for crg_clkout1 and crg_clkout2 so CLKOUT1 and CLKOUT2 outputs of the PLL are not in the SDC. Is...

The main issue comes from the fact that VPR is not able to propagate the clocks. In fact, this is what results when running in VPR: ``` 160 # Build...

@mithro `CI Tests` GH action job is replacing the kokoro runs

@vaughnbetz I have fixed formatting, as the PR was red, and everything is passing at the moment. I believe it is ready for an initial review