stdio_auto.py

00001 """
00002 mbed SDK
00003 Copyright (c) 2011-2013 ARM Limited
00004 
00005 Licensed under the Apache License, Version 2.0 (the "License");
00006 you may not use this file except in compliance with the License.
00007 You may obtain a copy of the License at
00008 
00009     http://www.apache.org/licenses/LICENSE-2.0
00010 
00011 Unless required by applicable law or agreed to in writing, software
00012 distributed under the License is distributed on an "AS IS" BASIS,
00013 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014 See the License for the specific language governing permissions and
00015 limitations under the License.
00016 """
00017 
00018 import re
00019 import random
00020 from time import time
00021 
00022 class StdioTest():
00023     PATTERN_INT_VALUE = "Your value was: (-?\d+)"
00024     re_detect_int_value = re.compile(PATTERN_INT_VALUE)
00025 
00026     def test(self, selftest):
00027         test_result = True
00028 
00029         c = selftest.mbed.serial_readline() # {{start}} preamble
00030         if c is None:
00031             return selftest.RESULT_IO_SERIAL
00032         selftest.notify(c)
00033 
00034         for i in range(0, 10):
00035             random_integer = random.randint(-99999, 99999)
00036             selftest.notify("HOST: Generated number: " + str(random_integer))
00037             start = time()
00038             selftest.mbed.serial_write(str(random_integer) + "\n")
00039 
00040             serial_stdio_msg = selftest.mbed.serial_readline()
00041             if serial_stdio_msg is None:
00042                 return selftest.RESULT_IO_SERIAL
00043             delay_time = time() - start
00044             selftest.notify(serial_stdio_msg.strip())
00045 
00046             # Searching for reply with scanned values
00047             m = self.re_detect_int_value.search(serial_stdio_msg)
00048             if m and len(m.groups()):
00049                 int_value = m.groups()[0]
00050                 int_value_cmp = random_integer == int(int_value)
00051                 test_result = test_result and int_value_cmp
00052                 selftest.notify("HOST: Number %s read after %.3f sec ... [%s]"% (int_value, delay_time, "OK" if int_value_cmp else "FAIL"))
00053             else:
00054                 test_result = False
00055                 break
00056         return selftest.RESULT_SUCCESS if test_result else selftest.RESULT_FAILURE