started to push the screensaver over
This commit is contained in:
Florian Streibelt
parent
0aad574f60
commit
f575423506
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@ -1,36 +1,70 @@
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import serial
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from thread import start_new_thread, allocate_lock
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import time
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class Display:
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def __init__(self,portname="/dev/ttyUSB0"):
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self.serialport=None
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self.open_port(portname)
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self.portlock = allocate_lock()
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self.portname=portname
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self.open_port()
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self.brightness=0
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self.screensaver = Screensaver(self)
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self.screensaver.start()
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def __del__(self):
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if (not self.screensaver == None):
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self.screensaver.terminate()
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self.screensaver = None
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if (not self.serialport == None):
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self.serialport.close()
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self.serialport=None
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def open_port(self,portname):
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self.serialport = serial.Serial(portname,9600,timeout=2,rtscts=True, dsrdtr=True)
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print ("Initializing display:\n %s\n" % self.serialport )
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def open_port(self):
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self.mutex_get()
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try:
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self.serialport = serial.Serial(self.portname,9600,timeout=2,rtscts=True, dsrdtr=True)
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print ("Initializing display on port:\n %s\n" % self.serialport )
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self.cmd_reset()
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self.write("Hello world")
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self.mutex_release()
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except Exception as e:
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print ("Exception opening serial port '%s' for display\n" % self.portname)
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print ("Ignoring and trying to open it again later\n")
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print (e)
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self.serialport = None
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self.mutex_release()
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pass
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def cmd_reset(self):
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#reset the display
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self.write("\x1b\x40")
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self.cmd("\x1b\x40")
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def cmd_cursor_show(self,on=True):
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#show or hide the cursor
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if (on):
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self.write("\x1f\x43\x01")
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self.cmd("\x1f\x43\x01")
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else:
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self.write("\x1f\x43\x00")
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self.cmd("\x1f\x43\x00")
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def cmd_blink(self,rate=127):
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self.write("\x1f\x45%c" % rate)
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self.cmd("\x1f\x45%c" % chr(rate))
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def cmd_brightness(self,level):
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if (level==0): #turn off:
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self.cmd_display_on(False)
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self.brightness = level
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return
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else:
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if (self.brightness==0): #turn on, then set wanted brightness:
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self.cmd_display_on(True)
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self.brightness = level
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self.cmd("\x1F\x58%c" % chr(level-1) )
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def cmd_display_on(self,on=True):
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# blink-command:
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@ -51,24 +85,105 @@ class Display:
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cmd_curmode(3)
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def cmd_curmode(self,val=2):
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self.write("\x1f%c" % val)
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self.cmd("\x1f%c" % chr(val))
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def cmd_clear(self):
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self.write("\x0c")
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self.cmd("\x0c")
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def cmd_time(self):
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# activate timer display in lower right corner.
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# actual time has to be set via display_set_timer.
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self.write("\x1f\x55")
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self.cmd("\x1f\x55")
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def cmd_time_set(self,h,m):
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def cmd_time_set(self,h=None,m=None):
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if (h==None or m==None):
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now = time.localtime()
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h=now.tm_hour
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m=now.tm_min
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# configures hour and minutes of the internal clock and
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# displays the time in the lower right corner.
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# turns off when something gets written into the line.
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# two bytes have to follow with hour and minute
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self.write("\x1F\x54%c%c" % (h,m) )
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self.cmd("\x1F\x54%c%c" % (chr(h),chr(m)) )
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self.cmd_curmode_hscroll() # makes the time more robust...
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def cmd(self,text): #for commands: do not reset screensaver timeout
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self.write(text,False)
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def write(self,text):
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def write(self,text,idle_reset=True): #for data: reset screensaver timeout
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if (not self.serialport == None):
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if (idle_reset):
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self.screensaver.idle_reset();
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self.serialport.write(text)
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else:
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self.open_port()
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def mutex_get(self):
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self.portlock.acquire()
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def mutex_release(self):
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self.portlock.release()
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def terminate(self):
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if (not self.screensaver == None):
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self.screensaver.terminate()
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self.screensaver = None
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import threading
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import time
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class Screensaver (threading.Thread):
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def __init__(self,display):
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self.display=display
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self.runme=True
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self.idlecounter=0
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self.timeout_dim=30
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self.timeout_message=60
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self.timeout_off=120
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self.mutex = allocate_lock()
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threading.Thread.__init__(self)
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def run(self):
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print "Starting Screensaver thread"
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while(self.runme):
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self.mutex.acquire()
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self._main_loop()
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self.mutex.release()
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time.sleep(.5)
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print "Exiting Screensaver thread"
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def terminate(self):
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self.runme = False
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def idle_reset(self):
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self.mutex.acquire()
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self.idlecounter=0
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self.mutex.release()
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def _main_loop(self):
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if (self.idlecounter < self.timeout_off):
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self.idlecounter+=1
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if (self.idlecounter>=self.timeout_dim and self.idlecounter <= (self.timeout_dim+7)):
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x = (8-( self.idlecounter - self.timeout_dim))/2
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self.display.mutax_get()
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self.display.cmd_brightness(1+x)
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self.display.mutax_release()
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return
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if (self.idlecounter==self.timeout_message):
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return
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if (self.idlecounter==self.timeout_off):
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self.display.mutax_get()
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display.cmd_display_on(False)
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self.display.mutax_release()
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return
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def __del__(self):
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print("bye")
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@ -60,6 +60,7 @@ lock = allocate_lock()
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def display_scroll_text(line,text):
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global scroll_line1,scroll_line2
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global offset_line1,offset_line2
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global lock
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lock.acquire()
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if (line==1): #clear the line on invocation:
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send_display("\x1f\x24\x01%c\x18" % chr(line) )
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@ -91,25 +92,15 @@ def display_handle_scroll(line,text,offset):
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def display_cmd_dim(x):
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global brightness
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if (brightness!=x):
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if (x==0): #turn off:
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send_display("\x1F\x45%c" % chr(255) )
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brightness = x
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return
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else:
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if (brightness==0): #turn on, then set wanted brightness:
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send_display("\x1F\x45%c" % chr(0) )
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brightness = x
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send_display("\x1F\x58%c" % chr(x-1) )
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def display_thread(x):
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global scroll_line1,scroll_line2
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global offset_line1,offset_line2
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global screensaver
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global idlemessage
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global lock
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offset_line1=0
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offset_line2=0
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@ -122,9 +113,6 @@ def display_thread(x):
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if (screensaver <= SCREENSAVER_OFF):
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screensaver=screensaver+1
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if ((screensaver >= SCREENSAVER_DIM) and (screensaver <= (SCREENSAVER_DIM+7))): #activate first stage of screensaver:
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x = (8-( screensaver - SCREENSAVER_DIM))/2
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display_cmd_dim(1+x)
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if (screensaver == SCREENSAVER_TIMEOUT):
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now = time.localtime()
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@ -137,35 +125,13 @@ def display_thread(x):
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offset_line1=0
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offset_line2=0
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if (screensaver == SCREENSAVER_OFF):
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display_cmd_dim(0)
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lock.release()
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time.sleep(.5)
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def send_display(s):
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global display_fifo
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if not display_fifo:
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try:
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fd = os.open( "/tmp/display", os.O_WRONLY)
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display_fifo = os.fdopen(fd,"w")
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except OSError:
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display_fifo = None
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pass
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return
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except IOError:
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display_fifo = None
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pass
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return
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try:
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display_fifo.write(s)
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display_fifo.flush()
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except IOError:
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display_fifo = None
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pass
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return
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global myDisplay
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myDisplay.write(s)
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#Front-End Funtion to display a Screen
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# with heading
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@ -198,6 +164,8 @@ def print_display(s):
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global scroll_line1,scroll_line2
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global offset_line1,offset_line2
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global screensaver
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global myDisplay
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global lock
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lock.acquire()
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screensaver=0
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@ -206,7 +174,7 @@ def print_display(s):
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scroll_line1=None
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scroll_line2=None
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display_cmd_dim(5)
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send_display(s)
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myDisplay.write(s)
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lock.release()
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def clear():
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@ -582,8 +550,7 @@ def main():
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myDisplay = Display("/dev/ttyUSB0")
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myDisplay.cmd_reset()
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print_display("\x1b\x40\x1f\x43\x00")
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myDisplay.cmd_cursor_show(False)
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start_new_thread(display_thread,(1,))
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#display_scroll_text(1,"Line1: Text, dumm scrollend!")
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@ -605,3 +572,5 @@ if __name__ == '__main__':
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except KeyboardInterrupt:
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pass
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print_display("\x1b\x40Goodbye!")
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myDisplay.terminate()
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