192050214 Mu Yuankai 192050208 Jia Yuebin
eDSL for finite state machine (Mealy).
Display as a state graph (GraphViz dots) or table (ASCII).
Provide a complex example, such as the controller of an elevator, a traffic light at an intersection, and so on.After modification, delete the example of the traffic light at the intersection, the main example is the controller of the elevator
Complete the FSM class together
Mu Yuankai finished FSM.py code module writing. Jia Yuebin completed the test modules and collected relevant data.
class StateMachineis a class of finite state machine .
member variables:
self.handlers = {} # State transfer function dictionary
self.startState = None # initial state
self.endStates = [] # Final state list
self.runResult = 0 # The result of function run
self.state = [] # To collect all state
self.trans = {} # Transfer process information
self.trans_to = {} # "Key" state can be transferred to "value" statemember methods:
def add_state(self, name, handler, trans_to, end_state=0):
'''
Function introduction:Add state
:param name:Name of the added state
:param handler:State transition function of the state
:param trans_to:The next state that this state allows to move to
:param end_state:Is the state final state or not.
:return:
'''def add_trans_status(self, state, move):
'''
Function introduction:Add state transition information
:param state:State name.
:param move:Actions performed in this state/
:return:
'''def set_start(self, name):
'''
Function introduction:Set start state.
:param name:State name.
:return:
'''def run(self, cargo):
'''
Function introduction:Running FSM.
:param cargo:Input action list.
:return:
'''def visualize(self):
'''
Function introduction:Create dot code for graphviz.
:return:
'''The state transition generation diagram is under src/stateMachine/elevator.
The initial state is "START", and the final state is "STATIC" or "ERROR".You can draw the transition rules from the state transition diagram.
According to the elevator example, different actions are performed by entering different values through the state machine.Understand the basic purpose of a finite state machine: to "run" in response to a series of events
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