diff options
Diffstat (limited to 'nexus/pack.cc')
| -rw-r--r-- | nexus/pack.cc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/nexus/pack.cc b/nexus/pack.cc index abe963ba..e12ce305 100644 --- a/nexus/pack.cc +++ b/nexus/pack.cc @@ -594,6 +594,19 @@ struct NexusPacker // Get IO type for reporting purposes std::string io_type = str_or_default(ci->attrs, id_IO_TYPE, "LVCMOS33"); + if (ctx->is_io_type_diff(io_type)) { + // Convert from SEIO18 to DIFFIO18 + if (ctx->getBelType(bel) != id_SEIO18_CORE) + log_error("IO '%s' uses differential type '%s' but is placed on wide range pin '%s'\n", + ctx->nameOf(ci), io_type.c_str(), loc.c_str()); + Loc bel_loc = ctx->getBelLocation(bel); + if (bel_loc.z != 0) + log_error("IO '%s' uses differential type '%s' but is placed on 'B' side pin '%s'\n", + ctx->nameOf(ci), io_type.c_str(), loc.c_str()); + bel_loc.z = 2; + bel = ctx->getBelByLocation(bel_loc); + } + log_info("Constraining %s IO '%s' to pin %s (%s%sbel %s)\n", io_type.c_str(), ctx->nameOf(ci), loc.c_str(), func.c_str(), func.empty() ? "" : "; ", ctx->nameOfBel(bel)); ci->attrs[id_BEL] = ctx->getBelName(bel).str(ctx); |