falling() and rising() docs

[hinxx]

The behavior of the fsmIO.falling() as documented is not matching what the code does:

pysmlib/smlib/io.py

Line 379 in 96ddde2

return self._currcb == 'change' and self._pval is not None and self._value < self._pval

The fsmIO.falling() will be True as soon as the value of the PV is less than previous value, and not when value is 0 as per docs:

pysmlib/docs/docs/html/io.html

Line 487 in 96ddde2

<dd class="field-odd"><p><code class="docutils literal notranslate"><span class="pre">True</span></code> if the input has just gone from not zero to 0. Best to use only with boolean values (binary PVs).</p>

FWIW, the comment in the code is correct.

Same applies to the docs of the fsmIO.rising().

[darcato]

You are right, the documentation is correct only in the context of binary input or output PVs that have only 0 or 1 values. I would keep the method as-is but specify better its behaviour in the docs.