我正在使用系统调用从MATLAB R2014a调用python程序（steppermotor.py）。 我正在使用这些命令从MATLAB调用python -
system('C:\Python33\python C:\PhidgetsPython\steppermotor.py initialize()');
steppermotor.py的主要脚本如下所示：
如果名称 =='主要'：
if sys.argv[1] =='initialization()':
initialization(1)
if re.search('CalibrationMIN',sys.argv[1]):
val = (re.search(r"[+-]?\d+(?:\.\d+)?",sys.argv[1]).group())
print(val)
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
if data1["Initialize"] ==1:
if val >= str(0):
x = CalibrationMIN(float(val))
print(x)
exit(x)
else:
print('Enter a positive value as input argument')
exit(3)
else:
print('Stepper is not Initialized')
exit(1)
if re.search('CalibrationMAX',sys.argv[1]):
val = (re.search(r"[+-]?\d+(?:\.\d+)?",sys.argv[1]).group())
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
if data1["Initialize"] ==1:
if val >= str(0):
x = CalibrationMAX(float(val))
print(x)
exit(x)
else:
print('Enter a positive value as input argument')
exit(x)
else:
print('Stepper is not Initialized')
exit(1)
if re.search('SetVelocity',sys.argv[1]):
val = int(re.search(r'\d+', sys.argv[1]).group())
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
if data1["Initialize"] ==1:
x = SetVelocity(int(val))
print(x)
exit(x)
else:
print('Stepper is not Initialized')
exit(1)
if re.search('SetAcceleration',sys.argv[1]):
val = int(re.search(r'\d+', sys.argv[1]).group())
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
if data1["Initialize"] ==1:
x = SetAcceleration(int(val))
print(x)
exit(x)
else:
print('Stepper is not Initialized')
exit(1)
if re.search('UserMove',sys.argv[1]):
val = (re.search(r"[+-]?\d+(?:\.\d+)?",sys.argv[1]).group())
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
maxlimit = data1["MaxChart"]
minlimit = data1["MinChart"]
if data1["Initialize"] ==1:
if data1["Calibrate"] ==1:
if float(val) <= math.ceil(maxlimit) and float(val) >= float(minlimit):
x = UserMove(float(val))
print(x)
exit(x)
else:
print('Please enter the value within the max limit %d and min limit %d .' % (maxlimit, minlimit) )
exit(4)
else:
print('Calibrate and set Maximum and Minumim limits in centimeters')
exit(2)
else:
print('Stepper is not Initialized')
exit(1)
if re.search('UnconditionalMove',sys.argv[1]):
val = (re.search(r"[+-]?\d+(?:\.\d+)?",sys.argv[1]).group())
initialization(1)
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
if data1["Initialize"] ==1:
x = UnconditionalMove(float(val))
print(x)
exit(x)
else:
print('Stepper is not Initialized')
exit(1)
if sys.argv[1] == 'Closeall()':
closeall()
if sys.argv[1] == 'Stop()':
Stop()
steppermotor.py的UserMove（）函数如下：
def UserMove（TargetPos）：
try:
# Initilize devices
initialization(0)
tem = open("count.pkl",'rb')
data1 = pickle.load(tem)
# For the first time reading current position of the from chart from the CalibrationMAX output and then updating current position.
currentPosition = data1["Max"]
# Before move command
data1["ChartPreviousPosition"] = currentPosition
# Subtract the current position values of the chart to the user input position
# Diff is the no of cm that motor will move
Diff = - float(currentPosition) + TargetPos
# Convert into motor steps
g = Diff*float(840.07140)
# set current position as start position
stepper.setCurrentPosition(0, 0)
encoder.setPosition(0,0)
print("Motor will now move %.2f cm" % Diff)
# Motor will now move to the target position
stepper.setTargetPosition(0, int(g))
# While currentPosition !=TargetPosition
while stepper.getCurrentPosition(0) != int(g):
#I want to break this while loop when Stop() is executed/stopFlag==True
if stopFlag == True:
exit(1) #return or break
else:
#Update the state of the motor
curr = stepper.getCurrentPosition(0)
EncodEnd = encoder.getPosition(0)
Enco = EncodEnd/4
chartcurr = 0.001190375*curr
chartpos = currentPosition + chartcurr
data1.update({'MotorMovedPosition':curr})
data1.update({'ChartMovedPosition':chartpos})
data1.update({'Max':chartpos})
sleep(0.2)
# Get the postion of the stepper once it has reached target
curr = stepper.getCurrentPosition(0)
# Get Encoder count value, the value is in PPR
EncodEnd = encoder.getPosition(0)
# convert that value into CPR
Enco = EncodEnd/4
IdealEncoderCnt = Diff*39.37847
#Check if the Encoder counts are as expected
if abs(abs(IdealEncoderCnt) - abs(Enco)) < 4:
print("Motor moved as expected")
elif (abs(IdealEncoderCnt) - abs(Enco)) >=4:
print("Motor didn't move all the way to the target position")
return 6
else:
print("Motor moved beyond the target position")
return 6
return 0
except PhidgetException as e:
print("Phidget Exception %i: %s" % (e.code, e.details))
print("Exiting....")
exit(1)
在steppermotor.py的stop（）函数中，我设置 stopFlag = True 。 请注意， stopFlag = False 被定义为全局变量。
我尝试使用steppermotor.py多线程（当调用该参数时，通过creatinf为主脚本中的每个函数创建一个线程），甚至进行多处理。但是当MATLAB使用
进行调用时，它似乎都不起作用%In the MoveMotor callback function of MATLAB
system('C:\Python33\python C:\PhidgetsPython\steppermotor.py UserMove(50)');
%In the stopMotor callback function of MATLAB
system('C:\Python33\python C:\PhidgetsPython\steppermotor.py Stop())');
我认为当第一次调用仍在执行时，当第二次系统调用是从MATLAB进行的时，会创建一个不同的steppermotor.py实例，并且不会在它们之间共享内存。因此，即使在第二次系统调用期间 stopFlag 设置为 True ，我也无法突破while循环。
我是否错过了一些明显的问题，或者是否有解决此问题的方法？
谢谢！