Mercurial > lasercutter

     1 #!/usr/bin/python

     2 

     3 # === Graster Streaming Script ===

     4 #

     5 # This script is invoked by g-code M101 at the

     6 # beginning of every graster job. It figures out

     7 # the name of the mask file and forks a process

     8 # to stream it to the HAL while AXIS executes the

     9 # motion code.

    10 #

    11 # This file must be symlinked to the ~/emc2/nc_files dir

    12 

    13 import emc, os, sys, threading, gtk, time, popen2, signal, select

    14 

    15 os.chdir("/home/hacklab/emc2/configs/hacklab-engraver3")

    16 ini = emc.ini("hacklab-engraver3.ini")

    17 emc.nmlfile = ini.find("EMC","NML_FILE")

    18 s = emc.stat()

    19 s.poll()

    20 ngc = s.file

    21 (base,ext) = os.path.splitext(ngc)

    22 gmask = base+".gmask"

    23 if not os.path.exists(gmask):

    24   gmask = ngc+".gmask"

    25   if not os.path.exists(gmask):

    26     os.system('zenity --error --text "Mask file \''+base+'.gmask\' not found. Laser disabled for this job."')

    27     sys.exit(os.EX_NOINPUT)

    28 

    29 

    30 def make_pbar():

    31   (path,fn) = os.path.split(gmask)

    32   message = "Streaming '"+fn+"'\n\n" + \

    33             "This dialog should complete and close itself some time before\n" + \

    34             "your job is done. If you stop the job, wait for this dialog\n" + \

    35             "to go away before starting another one. If it won't go away,\n" + \

    36             "click 'Cancel' and kill any processes containing 'M101'.\n"

    37   return popen2.Popen3('zenity --progress --auto-close --auto-kill --title "Graster Streamer" --text "'+message+'"')

    38 

    39 pbar = make_pbar()

    40 

    41 total_lines = 0

    42 fd = open(gmask,'r')

    43 for x in fd.readlines():

    44   total_lines += 1

    45 fd.close()

    46 

    47 total_lines = float(total_lines)

    48 count = 0

    49 

    50 print "Streaming '"+gmask+"'..."

    51 pid = os.fork()

    52 

    53 if pid:

    54   time.sleep(2)

    55   sys.exit(os.EX_OK)

    56 else:

    57   os.setsid()

    58   fin = open(gmask,'r')

    59   fout = os.popen('halstreamer','w')

    60   try:

    61     for line in fin.readlines():

    62       #r,w,e = select.select((),(fout,),(fout,),0.1)

    63       if pbar.poll() != -1: raise

    64 

    65       #if len(w) > 0:

    66       fout.write(line)

    67       count += 1

    68       #elif len(e) > 0:

    69       #  os.system("zenity --error --text 'Error writing to halstreamer. Job may not finish.'")

    70       #  raise

    71 

    72       pbar.tochild.write(str(int(100.0*count/total_lines))+"\n")

    73  

    74   finally:

    75     print "...cleaning up..."

    76     #fin.close()

    77     #fout.close()

    78     pbar.tochild.close()

    79     pbar.fromchild.close()

    80     #os.kill(pbar.pid,signal.SIGINT)

    81     #os.kill(pbar.pid,signal.SIGKILL)

    82     print "...done!"

    83     os._exit(os.EX_OK)

    84     #sys.exit(os.EX_OK)

    85
author	Robert McIntyre <rlm@mit.edu>
date	Tue, 24 Aug 2010 19:06:45 -0400
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