1 # Copyright 2015 The Android Open Source Project 2 # 3 # Licensed under the Apache License, Version 2.0 (the "License"); 4 # you may not use this file except in compliance with the License. 5 # You may obtain a copy of the License at 6 # 7 # http://www.apache.org/licenses/LICENSE-2.0 8 # 9 # Unless required by applicable law or agreed to in writing, software 10 # distributed under the License is distributed on an "AS IS" BASIS, 11 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 # See the License for the specific language governing permissions and 13 # limitations under the License. 14 15 import re 16 import subprocess 17 import sys 18 import time 19 20 DISPLAY_LEVEL = 96 # [0:255] Depends on tablet model. Adjust for best result. 21 DISPLAY_CMD_WAIT = 0.5 # seconds. Screen commands take time to have effect 22 DISPLAY_TIMEOUT = 1800000 # ms 23 24 25 def main(): 26 """Power up and unlock screen as needed.""" 27 screen_id = None 28 for s in sys.argv[1:]: 29 if s[:7] == 'screen=' and len(s) > 7: 30 screen_id = s[7:] 31 32 if not screen_id: 33 print 'Error: need to specify screen serial' 34 assert False 35 36 # turn on screen if necessary and unlock 37 cmd = ('adb -s %s shell dumpsys display | egrep "mScreenState"' 38 % screen_id) 39 process = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE) 40 cmd_ret = process.stdout.read() 41 screen_state = re.split(r'[s|=]', cmd_ret)[-1] 42 power_event = ('adb -s %s shell input keyevent POWER' % screen_id) 43 subprocess.Popen(power_event.split()) 44 time.sleep(DISPLAY_CMD_WAIT) 45 if 'ON' in screen_state: 46 print 'Screen was ON. Toggling to refresh.' 47 subprocess.Popen(power_event.split()) 48 time.sleep(DISPLAY_CMD_WAIT) 49 else: 50 print 'Screen was OFF. Powered ON.' 51 unlock = ('adb -s %s wait-for-device shell wm dismiss-keyguard' 52 % screen_id) 53 subprocess.Popen(unlock.split()) 54 time.sleep(DISPLAY_CMD_WAIT) 55 56 # set brightness 57 print 'Tablet display brightness set to %d' % DISPLAY_LEVEL 58 bright = ('adb -s %s shell settings put system screen_brightness %d' 59 % (screen_id, DISPLAY_LEVEL)) 60 subprocess.Popen(bright.split()) 61 time.sleep(DISPLAY_CMD_WAIT) 62 63 # set screen to dim at max time (30min) 64 stay_bright = ('adb -s %s shell settings put system screen_off_timeout %d' 65 % (screen_id, DISPLAY_TIMEOUT)) 66 subprocess.Popen(stay_bright.split()) 67 time.sleep(DISPLAY_CMD_WAIT) 68 69 if __name__ == '__main__': 70 main() 71
