Host test: wrapped timeout for MUTs serial port access to handle IO_SERIAL error while accessing serial port

workspace_tools/host_tests/host_test.py

@@ -86,6 +86,7 @@ class Mbed:
         print 'Mbed: "%s" "%s"' % (self.port, self.disk)
 
     def init_serial(self, baud=9600, extra_baud=9600):
+        """ Initialize serial port. Function will return error is port can't be opened or initialized """
         result = True
         try:
             self.serial = Serial(self.port, timeout=1)
@@ -100,6 +101,14 @@ class Mbed:
             self.flush()
         return result
 
+    def serial_timeout(self, timeout):
+        """ Wraps self.mbed.serial object timeout property """
+        result = None
+        if self.serial:
+            self.serial.timeout = timeout
+            result = True
+        return result
+
     def serial_read(self, count=1):
         """ Wraps self.mbed.serial object read method """
         result = None

workspace_tools/host_tests/rtc_auto.py

@@ -26,7 +26,9 @@ class RTCTest(DefaultTest):
 
     def run(self):
         test_result = True
-        c = self.mbed.serial.timeout = None
+        if self.mbed.serial_timeout(None) is None:
+            self.print_result("ioerr_serial")
+            return
         for i in range(0, 5):
             c = self.mbed.serial_read(38)   # 38 len("[1256729742] [2009-10-28 11:35:42 AM]\n"
             if c is None:

workspace_tools/host_tests/wait_us_auto.py

@@ -23,7 +23,9 @@ class WaitusTest(DefaultTest):
     def run(self):
         test_result = True
         # First character to start test (to know after reset when test starts)
-        self.mbed.serial.timeout = None
+        if self.mbed.serial_timeout(None) is None:
+            self.print_result("ioerr_serial")
+            return
         c = self.mbed.serial_read(1)
         if c is None:
             self.print_result("ioerr_serial")