diff options
| -rw-r--r-- | decoders/spi/pd.py | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/decoders/spi/pd.py b/decoders/spi/pd.py index cd40946..3bebc7d 100644 --- a/decoders/spi/pd.py +++ b/decoders/spi/pd.py @@ -266,6 +266,10 @@ class Decoder(srd.Decoder): self.have_mosi = (mosi in (0, 1)) self.have_cs = (cs in (0, 1)) + # Either MISO or MOSI (but not both) can be omitted. + if not (self.have_miso or self.have_mosi): + raise Exception('Either MISO or MOSI (or both) pins required.') + # State machine. if self.state == 'IDLE': self.find_clk_edge(miso, mosi, clk, cs) |