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Add .changed(io, edge) -> bool function to CycleTools.

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You can detect changes of IO values between two cycles. The function will
return True or False.
On bit IO objects you can also use parameter edge RISING or FALLING.
This commit is contained in:
Sven Sager
2020-07-19 18:20:39 +02:00
parent 85c4babc2a
commit 5e32bd12ff
1 changed files with 37 additions and 1 deletions
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38
revpimodio2/helper.py
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@@ -7,6 +7,7 @@ from threading import Event, Lock, Thread
from timeit import default_timer
from revpimodio2 import BOTH, FALLING, RISING
from revpimodio2.io import IOBase
__author__ = "Sven Sager"
__copyright__ = "Copyright (C) 2018 Sven Sager"
@@ -86,7 +87,8 @@ class Cycletools:
"""
__slots__ = "__cycle", "__cycletime", "__ucycle", "__dict_ton", \
"__dict_tof", "__dict_tp", "_start_timer", "core", "device", \
"__dict_tof", "__dict_tp", "__dict_change", \
"_start_timer", "core", "device", \
"first", "io", "last", "var", \
"flag1c", "flag5c", "flag10c", "flag15c", "flag20c", \
"flank5c", "flank10c", "flank15c", "flank20c"
@@ -96,6 +98,7 @@ class Cycletools:
self.__cycle = 0
self.__cycletime = cycletime
self.__ucycle = 0
self.__dict_change = {}
self.__dict_ton = {}
self.__dict_tof = {}
self.__dict_tp = {}
@@ -183,6 +186,39 @@ class Cycletools:
self.flag5c = not self.flag5c
self.__cycle = 0
# Process changed values
for io in self.__dict_change:
self.__dict_change[io] = io.get_value()
def changed(self, io: IOBase, edge=BOTH):
"""
Check change of IO value from last to this cycle.
It will always be False on the first use of this function with an
IO object.
:param io: IO to check for changes to last cycle
:return: True, if IO value changed
"""
if io in self.__dict_change:
if edge == BOTH:
return self.__dict_change[io] != io.get_value()
else:
value = io.get_value()
return self.__dict_change[io] != value and (
value and edge == RISING or
not value and edge == FALLING
)
else:
if not isinstance(io, IOBase):
raise TypeError("parameter 'io' must be an io object")
if not (edge == BOTH or type(io.value) == bool):
raise ValueError(
"parameter 'edge' can be used with bit io objects only"
)
self.__dict_change[io] = None
return False
def get_tof(self, name: str) -> bool:
"""
Wert der Ausschaltverzoegerung.