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"""
mbed SDK
Copyright (c) 2011-2015 ARM Limited
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Author: Przemyslaw Wirkus <Przemyslaw.Wirkus@arm.com>
"""
import re
import pkg_resources
from .host_test_plugins import HostTestPluginBase
class HostTestPluginResetMethod_Mbed(HostTestPluginBase):
# Plugin interface
name = 'HostTestPluginResetMethod_Mbed'
type = 'ResetMethod'
stable = True
capabilities = ['default']
required_parameters = ['serial']
def __init__(self):
"""! ctor
@details We can check module version by referring to version attribute
import pkg_resources
print pkg_resources.require("mbed-host-tests")[0].version
'2.7'
"""
HostTestPluginBase.__init__(self)
self.re_float = re.compile(r"^\d+\.\d+")
pyserial_version = pkg_resources.require("pyserial")[0].version
self.pyserial_version = self.get_pyserial_version(pyserial_version)
self.is_pyserial_v3 = float(self.pyserial_version) >= 3.0
def get_pyserial_version(self, pyserial_version):
"""! Retrieve pyserial module version
@return Returns float with pyserial module number
"""
version = 3.0
m = self.re_float.search(pyserial_version)
if m:
try:
version = float(m.group(0))
except ValueError:
version = 3.0 # We will assume you've got latest (3.0+)
return version
def safe_sendBreak(self, serial):
"""! Closure for pyserial version dependant API calls
"""
if self.is_pyserial_v3:
return self._safe_sendBreak_v3_0(serial)
return self._safe_sendBreak_v2_7(serial)
def _safe_sendBreak_v2_7(self, serial):
"""! pyserial 2.7 API implementation of sendBreak/setBreak
@details
Below API is deprecated for pyserial 3.x versions!
http://pyserial.readthedocs.org/en/latest/pyserial_api.html#serial.Serial.sendBreak
http://pyserial.readthedocs.org/en/latest/pyserial_api.html#serial.Serial.setBreak
"""
result = True
try:
serial.sendBreak()
except:
# In Linux a termios.error is raised in sendBreak and in setBreak.
# The following setBreak() is needed to release the reset signal on the target mcu.
try:
serial.setBreak(False)
except:
result = False
return result
def _safe_sendBreak_v3_0(self, serial):
"""! pyserial 3.x API implementation of send_brea / break_condition
@details
http://pyserial.readthedocs.org/en/latest/pyserial_api.html#serial.Serial.send_break
http://pyserial.readthedocs.org/en/latest/pyserial_api.html#serial.Serial.break_condition
"""
result = True
try:
serial.send_break()
except:
# In Linux a termios.error is raised in sendBreak and in setBreak.
# The following break_condition = False is needed to release the reset signal on the target mcu.
try:
serial.break_condition = False
except Exception as e:
self.print_plugin_error("Error while doing 'serial.break_condition = False' : %s"% str(e))
result = False
return result
def setup(self, *args, **kwargs):
"""! Configure plugin, this function should be called before plugin execute() method is used.
"""
return True
def execute(self, capability, *args, **kwargs):
"""! Executes capability by name
@param capability Capability name
@param args Additional arguments
@param kwargs Additional arguments
@details Each capability e.g. may directly just call some command line program or execute building pythonic function
@return Capability call return value
"""
if not kwargs['serial']:
self.print_plugin_error("Error: serial port not set (not opened?)")
return False
result = False
if self.check_parameters(capability, *args, **kwargs) is True:
if kwargs['serial']:
if capability == 'default':
serial = kwargs['serial']
result = self.safe_sendBreak(serial)
return result
def load_plugin():
"""! Returns plugin available in this module
"""
return HostTestPluginResetMethod_Mbed()
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