added command line options

added reset and pwm frequency methods

ledd.py

@@ -0,0 +1,129 @@
+# LEDD Project
+# Copyright (C) 2015 LEDD Team
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+"""LedD Daemon
+
+Usage:
+  ledd.py [--daemon] [-d | --debug] [-v | --verbose]
+  ledd.py -h | --help
+  ledd.py --version
+
+Options:
+  -h --help         Show this screen.
+  --version         Show version.
+  -d --debug        Show debug output. (not recommended for daily use)
+  -v --verbose      Be verbose.
+  --daemon          Run in daemon mode.
+"""
+
+import logging
+import sys
+import os
+from pkgutil import iter_modules
+
+from docopt import docopt
+
+import ledd.daemon
+import ledd
+
+if "smbus" not in (name for loader, name, ispkg in iter_modules()):
+    print("smbus not found, installing replacement")
+
+
+    class SMBus:
+        def __init__(self, i2c_address):
+            self.i2c_address = i2c_address
+            self.channels = {}
+
+        def write_word_data(self, addr, cmd, val):
+            if (cmd - 6) % 4 == 0:
+                self.channels[(cmd - 6) // 4] = val
+
+        def read_word_data(self, addr, cmd):
+            if (cmd - 8) // 4 not in self.channels:
+                self.channels[(cmd - 8) // 4] = 0
+            return self.channels[(cmd - 8) // 4]
+
+
+    class SMBusModule:
+        SMBus = SMBus
+
+
+    sys.modules['smbus'] = SMBusModule
+    sys.modules['smbus'].SMBus = SMBus
+
+
+def pid_exists(processid):
+    if processid < 0:
+        return False
+    try:
+        os.kill(processid, 0)
+    except ProcessLookupError:
+        return False
+    except PermissionError:
+        return True
+    else:
+        return True
+
+
+if __name__ == "__main__":
+    arguments = docopt(__doc__, version='LedD Daemon ' + ledd.VERSION)
+    lvl = logging.WARNING
+
+    if arguments['--verbose']:
+        lvl = logging.INFO
+
+    if arguments['--debug']:
+        lvl = logging.DEBUG
+
+    logging.basicConfig(level=lvl,
+                        format="[%(asctime)s] %(levelname)s [%(name)s.%(funcName)s:%(lineno)d] %(message)s",
+                        datefmt="%H:%M:%S")
+    log = logging.getLogger(__name__)
+
+    try:
+        with open('ledd.pid', 'r') as f:
+            spid = f.read()
+            if spid:
+                if pid_exists(int(spid)):
+                    log.fatal("A instance of the program is already running, exiting...")
+                    sys.exit(5)
+                else:
+                    log.warning("Found stale pid file, assuming unclean shutdown.")
+    except FileNotFoundError:
+        pass
+
+    if arguments['--daemon']:
+        wdir = os.path.dirname(os.path.realpath(__file__))
+        try:
+            pid = os.fork()
+            if pid == 0:
+                os.setsid()
+                pid2 = os.fork()
+                if pid2 == 0:
+                    os.umask(0)
+                    os.chdir(wdir)
+                    with open("ledd.pid", 'w') as pidf:
+                        pidf.write(str(os.getpid()) + '\n')
+                    daemon = ledd.daemon.Daemon()
+                else:
+                    sys.exit()
+            else:
+                sys.exit()
+        except OSError as e:
+            log.fatal("Start failed: %s", e)
+    else:
+        daemon = ledd.daemon.Daemon()