diff options
| -rw-r--r-- | ice40/cells.cc | 22 |
1 files changed, 14 insertions, 8 deletions
diff --git a/ice40/cells.cc b/ice40/cells.cc index fc24caaf..5e3bd139 100644 --- a/ice40/cells.cc +++ b/ice40/cells.cc @@ -404,25 +404,23 @@ void dff_to_lc(const Context *ctx, CellInfo *dff, CellInfo *lc, bool pass_thru_l void nxio_to_sb(Context *ctx, CellInfo *nxio, CellInfo *sbio, pool<IdString> &todelete_cells) { + bool pull_up_attr = false; + if (nxio->type == ctx->id("$nextpnr_ibuf")) { sbio->params[id_PIN_TYPE] = 1; - auto pu_attr = nxio->attrs.find(id_PULLUP); - if (pu_attr != nxio->attrs.end()) - sbio->params[id_PULLUP] = pu_attr->second; nxio->movePortTo(id_O, sbio, id_D_IN_0); + pull_up_attr = true; } else if (nxio->type == ctx->id("$nextpnr_obuf")) { sbio->params[id_PIN_TYPE] = 25; nxio->movePortTo(id_I, sbio, id_D_OUT_0); } else if (nxio->type == ctx->id("$nextpnr_iobuf")) { // N.B. tristate will be dealt with below NetInfo *i = nxio->getPort(id_I); - if (i == nullptr || i->driver.cell == nullptr) + if (i == nullptr || i->driver.cell == nullptr) { sbio->params[id_PIN_TYPE] = 1; - else + pull_up_attr = true; + } else sbio->params[id_PIN_TYPE] = 25; - auto pu_attr = nxio->attrs.find(id_PULLUP); - if (pu_attr != nxio->attrs.end()) - sbio->params[id_PULLUP] = pu_attr->second; nxio->movePortTo(id_I, sbio, id_D_OUT_0); nxio->movePortTo(id_O, sbio, id_D_IN_0); } else { @@ -465,6 +463,7 @@ void nxio_to_sb(Context *ctx, CellInfo *nxio, CellInfo *sbio, pool<IdString> &to sbio->params[id_PIN_TYPE] = 41; tbuf->movePortTo(id_A, sbio, id_D_OUT_0); tbuf->movePortTo(id_E, sbio, id_OUTPUT_ENABLE); + pull_up_attr = true; if (donet->users.entries() > 1) { for (auto user : donet->users) @@ -476,6 +475,13 @@ void nxio_to_sb(Context *ctx, CellInfo *nxio, CellInfo *sbio, pool<IdString> &to ctx->nets.erase(donet->name); todelete_cells.insert(tbuf->name); } + + // Copy pull-up attribute if there's any chance output driver isn't active + if (pull_up_attr) { + auto pu_attr = nxio->attrs.find(id_PULLUP); + if (pu_attr != nxio->attrs.end()) + sbio->params[id_PULLUP] = pu_attr->second; + } } uint8_t sb_pll40_type(const BaseCtx *ctx, const CellInfo *cell) |