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| author | David Shah <dave@ds0.me> | 2020-03-08 11:32:34 +0000 |
|---|---|---|
| committer | David Shah <dave@ds0.me> | 2020-03-08 11:32:34 +0000 |
| commit | 751f4556fde8a316030b36c3de53f08a548e3efa (patch) | |
| tree | c5465dd92ce70d564b48aeb81e1fcbe4a222874d | |
| parent | 7ac173539579164eb2ba888676cf758dbc3e1cda (diff) | |
| download | nextpnr-751f4556fde8a316030b36c3de53f08a548e3efa.tar.gz nextpnr-751f4556fde8a316030b36c3de53f08a548e3efa.tar.bz2 nextpnr-751f4556fde8a316030b36c3de53f08a548e3efa.zip | |
ecp5: Fix differential inputs
Signed-off-by: David Shah <dave@ds0.me>
| -rw-r--r-- | ecp5/bitstream.cc | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc index bc8a6c55..1bdb4188 100644 --- a/ecp5/bitstream.cc +++ b/ecp5/bitstream.cc @@ -650,7 +650,7 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex } // Find bank voltages std::unordered_map<int, IOVoltage> bankVcc; - std::unordered_map<int, bool> bankLvds, bankVref; + std::unordered_map<int, bool> bankLvds, bankVref, bankDiff; for (auto &cell : ctx->cells) { CellInfo *ci = cell.second.get(); @@ -675,6 +675,8 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex if (iotype == "LVDS") bankLvds[bank] = true; + if ((dir == "INPUT" || dir == "BIDIR") && is_differential(ioType_from_str(iotype))) + bankDiff[bank] = true; if ((dir == "INPUT" || dir == "BIDIR") && is_referenced(ioType_from_str(iotype))) bankVref[bank] = true; } @@ -698,6 +700,9 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex cc.tiles[tile.first].add_enum("BANK.DIFF_REF", "ON"); cc.tiles[tile.first].add_enum("BANK.LVDSO", "ON"); } + if (bankDiff[bank]) { + cc.tiles[tile.first].add_enum("BANK.DIFF_REF", "ON"); + } if (bankVref[bank]) { cc.tiles[tile.first].add_enum("BANK.DIFF_REF", "ON"); cc.tiles[tile.first].add_enum("BANK.VREF", "ON"); |