serial_nc_rx_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 sys
00019 import uuid
00020 import time
00021 import string
00022 from sys import stdout
00023 
00024 class SerialNCRXTest():
00025 
00026     def test(self, selftest):
00027         selftest.mbed.flush();
00028         selftest.mbed.serial_write("E");
00029 
00030         strip_chars = string.whitespace + "\0"
00031 
00032         out_str = selftest.mbed.serial_readline()
00033 
00034         if not out_str:
00035             selftest.notify("HOST: No output detected")
00036             return selftest.RESULT_IO_SERIAL
00037 
00038         out_str_stripped = out_str.strip(strip_chars)
00039 
00040         if out_str_stripped != "RX OK - Expected":
00041             selftest.notify("HOST: Unexpected output. Expected 'RX OK - Expected' but received '%s'" % out_str_stripped)
00042             return selftest.RESULT_FAILURE
00043 
00044         # Wait 0.5 seconds to ensure mbed is listening
00045         time.sleep(0.5)
00046 
00047         # Send character, mbed shouldn't receive
00048         selftest.mbed.serial_write("U");
00049 
00050         out_str = selftest.mbed.serial_readline()
00051 
00052         # If no characters received, pass the test
00053         if not out_str:
00054             selftest.notify("HOST: No further output detected")
00055             return selftest.RESULT_SUCCESS
00056         else:
00057             out_str_stripped = out_str.strip(strip_chars)
00058 
00059             if out_str_stripped == "RX OK - Unexpected":
00060                 selftest.notify("HOST: Unexpected output returned indicating RX still functioning")
00061             else:
00062                 selftest.notify("HOST: Extraneous output '%s' detected indicating unknown error" % out_str_stripped)
00063 
00064             return selftest.RESULT_FAILURE