fix(serial): reload corrupt serial drivers

Author: MrKevinWeiss

mm_pal/__init__.py

@@ -13,7 +13,7 @@
 
 __author__ = "Kevin Weiss"
 __email__ = "[email protected]"
-__version__ = "1.2.0"
+__version__ = "1.2.1"
 
 __all__ = ['MmIf',
            'MmCmd',

mm_pal/serial_driver.py

@@ -11,7 +11,7 @@
 import logging
 import time
 from typing import Dict
-from serial import Serial, PARITY_NONE
+from serial import Serial, PARITY_NONE, SerialException
 from serial.tools import list_ports
 
 
@@ -133,15 +133,20 @@ def _connect(self, *args, **kwargs):
 
         if _serialports.get(port):
             self.logger.debug("Serial port %r already exists", port)
-            self.dev = _serialports[port]
-            if 'parity' in kwargs:
-                self.dev.parity = kwargs['parity']
-            else:
-                self.dev.parity = PARITY_NONE
-            if 'timeout' in kwargs:
-                self.dev.timeout = kwargs['timeout']
-            if 'baudrate' in kwargs:
-                self.dev.baudrate = kwargs['baudrate']
+            try:
+                self.dev = _serialports[port]
+                if 'parity' in kwargs:
+                    self.dev.parity = kwargs['parity']
+                else:
+                    self.dev.parity = PARITY_NONE
+                if 'timeout' in kwargs:
+                    self.dev.timeout = kwargs['timeout']
+                if 'baudrate' in kwargs:
+                    self.dev.baudrate = kwargs['baudrate']
+            except SerialException:
+                del _serialports[port]
+                self.dev = Serial(*args, **kwargs)
+                _serialports[port] = self.dev
         else:
             self.dev = Serial(*args, **kwargs)
             _serialports[port] = self.dev