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| author | David Shah <davey1576@gmail.com> | 2018-07-24 22:26:26 +0200 |
|---|---|---|
| committer | David Shah <davey1576@gmail.com> | 2018-07-24 22:26:26 +0200 |
| commit | 32c7247785f48b2307e559a0af50d9387bda8b49 (patch) | |
| tree | a980ebb10f55084dea5f91738240602a8b5e448a /ecp5 | |
| parent | 5a7e7b2d039cdad68c6651e67765d7adb2282f25 (diff) | |
| download | nextpnr-32c7247785f48b2307e559a0af50d9387bda8b49.tar.gz nextpnr-32c7247785f48b2307e559a0af50d9387bda8b49.tar.bz2 nextpnr-32c7247785f48b2307e559a0af50d9387bda8b49.zip | |
ecp5: Bitsream gen tuning
Signed-off-by: David Shah <davey1576@gmail.com>
Diffstat (limited to 'ecp5')
| -rw-r--r-- | ecp5/bitstream.cc | 27 |
1 files changed, 16 insertions, 11 deletions
diff --git a/ecp5/bitstream.cc b/ecp5/bitstream.cc index 9a925d63..f1feba24 100644 --- a/ecp5/bitstream.cc +++ b/ecp5/bitstream.cc @@ -191,18 +191,23 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex CellInfo *ci = cell.second.get(); if (ci->bel != BelId() && ci->type == ctx->id("TRELLIS_IO")) { int bank = ctx->getPioBelBank(ci->bel); + std::string dir = str_or_default(ci->params, ctx->id("DIR"), "INPUT"); std::string iotype = str_or_default(ci->attrs, ctx->id("IO_TYPE"), "LVCMOS33"); - IOVoltage vcc = get_vccio(ioType_from_str(iotype)); - if (bankVcc.find(bank) != bankVcc.end()) { - // TODO: strong and weak constraints - if (bankVcc[bank] != vcc) { - log_error("Error processing '%s': incompatible IO voltages %s and %s on bank %d.", - cell.first.c_str(ctx), iovoltage_to_str(bankVcc[bank]).c_str(), - iovoltage_to_str(vcc).c_str(), bank); + + if (dir != "INPUT") { + IOVoltage vcc = get_vccio(ioType_from_str(iotype)); + if (bankVcc.find(bank) != bankVcc.end()) { + // TODO: strong and weak constraints + if (bankVcc[bank] != vcc) { + log_error("Error processing '%s': incompatible IO voltages %s and %s on bank %d.", + cell.first.c_str(ctx), iovoltage_to_str(bankVcc[bank]).c_str(), + iovoltage_to_str(vcc).c_str(), bank); + } + } else { + bankVcc[bank] = vcc; } - } else { - bankVcc[bank] = vcc; } + if (iotype == "LVDS") bankLvds[bank] = true; } @@ -275,8 +280,8 @@ void write_bitstream(Context *ctx, std::string base_config_file, std::string tex other = "PIOD"; else log_error("cannot place differential IO at location %s\n", pio.c_str()); - cc.tiles[pio_tile].add_enum(other + ".BASE_TYPE", "_NONE_"); - cc.tiles[pic_tile].add_enum(other + ".BASE_TYPE", "_NONE_"); + //cc.tiles[pio_tile].add_enum(other + ".BASE_TYPE", "_NONE_"); + //cc.tiles[pic_tile].add_enum(other + ".BASE_TYPE", "_NONE_"); cc.tiles[pio_tile].add_enum(other + ".PULLMODE", "NONE"); cc.tiles[pio_tile].add_enum(pio + ".PULLMODE", "NONE"); } |