tool/mbed/mbed-sdk/workspace_tools/host_tests/host_tests_plugins/module_reset_mbed.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 from host_test_plugins import HostTestPluginBase
  19
  20
  21 class HostTestPluginResetMethod_Mbed(HostTestPluginBase):
  22
  23     def safe_sendBreak(self, serial):
  24         """ Wraps serial.sendBreak() to avoid serial::serialposix.py exception on Linux
  25             Traceback (most recent call last):
  26               File "make.py", line 189, in <module>
  27                 serial.sendBreak()
  28               File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 511, in sendBreak
  29                 termios.tcsendbreak(self.fd, int(duration/0.25))
  30             error: (32, 'Broken pipe')
  31         """
  32         result = True
  33         try:
  34             serial.sendBreak()
  35         except:
  36             # In linux a termios.error is raised in sendBreak and in setBreak.
  37             # The following setBreak() is needed to release the reset signal on the target mcu.
  38             try:
  39                 serial.setBreak(False)
  40             except:
  41                 result = False
  42         return result
  43
  44     # Plugin interface
  45     name = 'HostTestPluginResetMethod_Mbed'
  46     type = 'ResetMethod'
  47     stable = True
  48     capabilities = ['default']
  49     required_parameters = ['serial']
  50
  51     def setup(self, *args, **kwargs):
  52         """ Configure plugin, this function should be called before plugin execute() method is used.
  53         """
  54         return True
  55
  56     def execute(self, capabilitity, *args, **kwargs):
  57         """ Executes capability by name.
  58             Each capability may directly just call some command line
  59             program or execute building pythonic function
  60         """
  61         result = False
  62         if self.check_parameters(capabilitity, *args, **kwargs) is True:
  63             if capabilitity == 'default':
  64                 serial = kwargs['serial']
  65                 result = self.safe_sendBreak(serial)
  66         return result
  67
  68
  69 def load_plugin():
  70     """ Returns plugin available in this module
  71     """
  72     return HostTestPluginResetMethod_Mbed()