diff options
| -rw-r--r-- | nmigen_boards/resources/interface.py | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/nmigen_boards/resources/interface.py b/nmigen_boards/resources/interface.py index 97489e2..848e1b8 100644 --- a/nmigen_boards/resources/interface.py +++ b/nmigen_boards/resources/interface.py @@ -6,7 +6,8 @@ __all__ = ["UARTResource", "IrDAResource", "SPIResource"] def UARTResource(*args, rx, tx, rts=None, cts=None, dtr=None, dsr=None, dcd=None, ri=None, conn=None, attrs=None, role=None): - assert role in ("dce", "dte") + if any(line is not None for line in (rts, cts, dtr, dsr, dcd, ri)): + assert role in ("dce", "dte") if role == "dte": dce_to_dte = "i" dte_to_dce = "o" |