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#!/usr/bin/env python
#
# Copyright 2017 Ettus Research (National Instruments)
#
# 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/>.
#
"""
Main executable for the USRP Hardware Daemon
"""
from __future__ import print_function
import sys
from gevent import signal
import usrp_mpm as mpm
from usrp_mpm.types import SharedState
from usrp_mpm.periph_manager import periph_manager
_PROCESSES = []
def kill_time(sig, frame):
"""
kill all processes
to be used in a signal handler
If all processes are properly terminated, this will exit
"""
log = mpm.get_main_logger().getChild('kill')
for proc in _PROCESSES:
proc.terminate()
LOG.info("Terminating pid: {0}".format(proc.pid))
for proc in _PROCESSES:
proc.join()
LOG.info("System exiting")
sys.exit(0)
def main():
"""
Go, go, go!
Main process loop.
"""
log = mpm.get_main_logger().getChild('main')
shared = SharedState()
# Create the periph_manager for this device
# This call will be forwarded to the device specific implementation
# e.g. in periph_manager/n310.py
# Which implementation is called will be determined during configuration
# with cmake (-DMPM_DEVICE).
# mgr is thus derived from PeriphManagerBase (see periph_manager/base.py)
log.info("Spawning periph manager...")
mgr = periph_manager()
discovery_info = {
"type": mgr._get_device_info()["type"],
"serial": mgr._get_device_info()["serial"]
}
log.info("Spawning discovery process...")
_PROCESSES.append(
mpm.spawn_discovery_process(discovery_info, shared))
log.info("Spawning RPC process...")
_PROCESSES.append(
mpm.spawn_rpc_process(mpm.types.MPM_RPC_PORT, shared, mgr))
log.info("Processes launched. Registering signal handlers.")
signal.signal(signal.SIGTERM, kill_time)
signal.signal(signal.SIGINT, kill_time)
signal.pause()
return True
if __name__ == '__main__':
exit(not main())
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