tool/mbed/mbed-sdk/workspace_tools/host_tests/echo.py

   1 """
   2 mbed SDK
   3 Copyright (c) 2011-2013 ARM Limited
   4
   5 Licensed under the Apache License, Version 2.0 (the "License");
   6 you may not use this file except in compliance with the License.
   7 You may obtain a copy of the License at
   8
   9     http://www.apache.org/licenses/LICENSE-2.0
  10
  11 Unless required by applicable law or agreed to in writing, software
  12 distributed under the License is distributed on an "AS IS" BASIS,
  13 WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 See the License for the specific language governing permissions and
  15 limitations under the License.
  16 """
  17
  18 import sys
  19 import uuid
  20 from sys import stdout
  21
  22 class EchoTest():
  23
  24     # Test parameters
  25     TEST_SERIAL_BAUDRATE = 115200
  26     TEST_LOOP_COUNT = 50
  27
  28     def test(self, selftest):
  29         """ This host test will use mbed serial port with
  30             baudrate 115200 to perform echo test on that port.
  31         """
  32         # Custom initialization for echo test
  33         selftest.mbed.init_serial_params(serial_baud=self.TEST_SERIAL_BAUDRATE)
  34         selftest.mbed.init_serial()
  35
  36         # Test function, return True or False to get standard test notification on stdout
  37         selftest.mbed.flush()
  38         selftest.notify("HOST: Starting the ECHO test")
  39         result = True
  40
  41         """ This ensures that there are no parasites left in the serial buffer.
  42         """
  43         for i in range(0, 2):
  44             selftest.mbed.serial_write("\n")
  45             c = selftest.mbed.serial_readline()
  46
  47         for i in range(0, self.TEST_LOOP_COUNT):
  48             TEST_STRING = str(uuid.uuid4()) + "\n"
  49             selftest.mbed.serial_write(TEST_STRING)
  50             c = selftest.mbed.serial_readline()
  51             if c is None:
  52                 return selftest.RESULT_IO_SERIAL
  53             if c.strip() != TEST_STRING.strip():
  54                 selftest.notify('HOST: "%s" != "%s"'% (c, TEST_STRING))
  55                 result = False
  56             else:
  57                 sys.stdout.write('.')
  58                 stdout.flush()
  59         return selftest.RESULT_SUCCESS if result else selftest.RESULT_FAILURE