1 #!/usr/bin/python 2 3 # Copyright (C) 2014 The Android Open Source Project 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 from . import Abstract_Power_Monitor 18 19 class Power_Monitor(Abstract_Power_Monitor): 20 """ 21 Dummy implementation for internal use only to test host-to-device 22 interactions without need for a real power monitor. This is not 23 to be used in any way as part of CtsVerifier or CTS verification 24 activities in general. 25 """ 26 27 28 def __init__(self, device = None, wait = False, log_file_id = None ): 29 self._device = device 30 self._usbpassthroughmode = 1 31 self._voltage = 0.0 32 self._data_active = False 33 self._sequence = 0 34 35 def __del__(self): 36 self.Close() 37 38 def Close(self): 39 pass 40 41 @staticmethod 42 def Discover(): 43 return ["dummy_monitor"] 44 45 def GetStatus(self): 46 """ Requests and waits for status. Returns status dictionary. """ 47 return {"usbPassthroughMode": self._usbpassthroughmode, 48 "sampleRate":1} 49 50 51 def RampVoltage(self, start, end): 52 self._voltage = end 53 54 def SetVoltage(self, v): 55 """ Set the output voltage, 0 to disable. """ 56 self._voltage = v 57 58 def SetMaxCurrent(self, i): 59 """Set the max output current.""" 60 self._max_current = i 61 62 def SetUsbPassthrough(self, val): 63 """ Set the USB passthrough mode: 0 = off, 1 = on, 2 = auto. """ 64 self._usbpassthroughmode = val 65 66 def StartDataCollection(self): 67 """ Tell the device to start collecting and sending measurement data. """ 68 self._data_active = True 69 70 def StopDataCollection(self): 71 """ Tell the device to stop collecting measurement data. """ 72 self._data_active = False 73 74 def CollectData(self, verbose = True): 75 """ Return some current samples. Call StartDataCollection() first. """ 76 #self.log("Collecting data ...", debug = True) 77 import random 78 if self._data_active: 79 base = [0.003, 0.003, 0.003, (self._sequence%4)*0.0005] 80 self._sequence += 1 81 values = [ random.gauss(base[(self._sequence-1)%4], 0.0005) for _ in range(100)] 82 else: 83 values = None 84 return values 85
