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| author | David Shah <dave@ds0.me> | 2020-10-13 10:07:28 +0100 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-11-30 08:45:27 +0000 |
| commit | 1bb509897c77b7a8931f10b84dc1de98668c04bd (patch) | |
| tree | 7f4780fbb09d23823d8c0c6422626ab33c2fd762 /nexus/fasm.cc | |
| parent | 0eb5c72cc5b95a7fb6b848e8d09ea9b235bce9b3 (diff) | |
| download | nextpnr-1bb509897c77b7a8931f10b84dc1de98668c04bd.tar.gz nextpnr-1bb509897c77b7a8931f10b84dc1de98668c04bd.tar.bz2 nextpnr-1bb509897c77b7a8931f10b84dc1de98668c04bd.zip | |
nexus: More pin styles and FASM pinmux gen
Signed-off-by: David Shah <dave@ds0.me>
Diffstat (limited to 'nexus/fasm.cc')
| -rw-r--r-- | nexus/fasm.cc | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/nexus/fasm.cc b/nexus/fasm.cc index 7d25de58..50b41e06 100644 --- a/nexus/fasm.cc +++ b/nexus/fasm.cc @@ -184,6 +184,30 @@ struct NexusFasmWriter write_pip(p); blank(); } + // Write out the mux config for a cell + void write_cell_muxes(const CellInfo *cell) + { + for (auto port : sorted_cref(cell->ports)) { + // Only relevant to inputs + if (port.second.type != PORT_IN) + continue; + auto pin_style = ctx->get_cell_pin_style(cell, port.first); + auto pin_mux = ctx->get_cell_pinmux(cell, port.first); + // Invertible pins + if (pin_style & PINOPT_INV) { + if (pin_mux == PINMUX_INV || pin_mux == PINMUX_0) + write_bit(stringf("%sMUX.INV", ctx->nameOf(port.first))); + else if (pin_mux == PINMUX_SIG) + write_bit(stringf("%sMUX.%s", ctx->nameOf(port.first), ctx->nameOf(port.first))); + } + // Pins that must be explictly enabled + if ((pin_style & PINBIT_GATED) && (pin_mux == PINMUX_SIG)) + write_bit(stringf("%sMUX.%s", ctx->nameOf(port.first), ctx->nameOf(port.first))); + // Pins that must be explictly set to 1 rather than just left floating + if ((pin_style & PINBIT_1) && (pin_mux == PINMUX_1)) + write_bit(stringf("%sMUX.1", ctx->nameOf(port.first))); + } + } // Write config for an OXIDE_COMB cell void write_comb(const CellInfo *cell) { |