我是python的新手,我正在尝试编写一个程序,该程序通过选定的COM端口连接到Arduino,并不断更新状态(已连接或已断开)
我使用的计时器每1秒更新一次。这里的问题是每次我运行代码时,即使我先前在Ser
中声明了它,但都说Ontimer
中的on_press
没有定义。我该如何解决?
class GuiFrame(wx.Frame):
def __init__(self,parent,title):
super().__init__(parent, title = title, size =(950,550))
self.InitUI()
def InitUI(self):
panel = wx.Panel(self)
self.timer = wx.Timer(self, 1)
self.timer.Start(100)
self.Bind(wx.EVT_TIMER, self.OnTimer, self.timer)
st1 = wx.StaticText(panel, label='COM port: ', pos=(5, 5))
self.text_ctrl = wx.TextCtrl(panel, pos=(5, 30))
my_btn = wx.Button(panel, label='Enter', pos=(5, 65))
my_btn.Bind(wx.EVT_BUTTON, self.on_press)
self.sb = self.CreateStatusBar()
def on_press(self,event):
global Ser
com = self.text_ctrl.GetValue()
if not com:
print("Please enter port!")
else:
Ser = SerialCom(com,115200)
self.sb.SetStatusText(Ser.connect())
time.sleep(1)
def OnTimer(self, event):
global Ser
self.sb.SetStatusText(Ser.status())
[...]如何确保始终定义Ser?