Commit f7dc5d36 authored by Mikhail Karpenko's avatar Mikhail Karpenko

Add temperature monitoring script

parent fc532ce4
...@@ -31,7 +31,6 @@ IMAGE_INSTALL_append += " python-core \ ...@@ -31,7 +31,6 @@ IMAGE_INSTALL_append += " python-core \
libsjs \ libsjs \
smartmontools \ smartmontools \
libogg \ libogg \
init-elphel393 \
apps-camogm \ apps-camogm \
apps-imgsrv \ apps-imgsrv \
iw \ iw \
...@@ -39,6 +38,7 @@ IMAGE_INSTALL_append += " python-core \ ...@@ -39,6 +38,7 @@ IMAGE_INSTALL_append += " python-core \
dhcp-client \ dhcp-client \
linux-firmware-rtl8192cu \ linux-firmware-rtl8192cu \
init-elphel393 \ init-elphel393 \
init-tempmon \
" "
#kernel-modules #kernel-modules
......
This diff is collapsed.
#!/bin/sh
PATH=/sbin:/bin:/usr/sbin:/usr/bin
DAEMON=/usr/sbin/init_tempmon
NAME=init_tempmon
DESC="temperature monitor daemon"
MNTPOINT=/mnt/mmc
MMCDEV=/dev/mmcblk0p1
SOME_SCRIPT=init_tempmon.py
case "$1" in
start)
echo -n "Starting $DESC: "
if [ -f $MNTPOINT/$SOME_SCRIPT ]; then
echo " Launching $SOME_SCRIPT"
$MNTPOINT/$SOME_SCRIPT
else
echo " $SOME_SCRIPT not found. Nothing to launch."
fi
;;
stop)
echo -n "Stopping $DESC: "
echo "$NAME."
;;
restart)
echo -n "Restarting $DESC: "
echo "$NAME."
;;
status)
echo -n "$NAME status:"
if [ -f /var/run/$NAME ]; then
echo -n "Running"
else
echo -n "Not running"
fi
;;
*)
N=/etc/init.d/$NAME
echo "Usage: $N {start|stop|restart|status}" >&2
exit 1
;;
esac
exit 0
#!/usr/bin/env python
# encoding: utf-8
'''
# Temperature monitor for Elphel393 camera.
# This python script should be started as a daemon at startup. It will continuously monitor
# camera temperature and turn external fan on and off. It will also turn camera off in case
# of extreme temperature limit is exceeded.
#
# Copyright (C) 2016, Elphel.inc.
#
# 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/>.
'''
import os
import sys
import time
import subprocess
from posix import EX_OSFILE, F_OK
DEBUG = 0
""" Set temperature when the fan should be turned on. """
TEMP_FAN_ON = 35.0
""" Set temperature when the system should be turned off. """
TEMP_SHUTDOWN = 60.0
""" Temperature hysteresis in degrees. """
TEMP_HYSTERESIS = 2.0
""" Temperature sampling time in seconds. This constant may be a floating point value. """
SAMPLING_TIME = 1
""" Temperature scaling factor. """
SCALE_CFT = 0.001
ctrl_path_pref = "/sys/devices/soc0/elphel393-pwr@0/"
ctrl_fn = {"poweroff_fn": "power_off",
"vp5_en_fn": "channels_en",
"vp5_dis_fn": "channels_dis",
"gpio_fn": "gpio_10389"}
hwmon_path_pref = "/sys/devices/soc0/amba@0/f8007100.ps7-xadc/iio:device0/"
hwmon_fn = {"offset": "in_temp0_offset",
"raw": "in_temp0_raw",
"scale": "in_temp0_scale"}
out_path_pref = "/var/volatile/tmp/"
out_fn = {"core_temp_fn": "core_temp"}
class temp_monitor():
def __init__(self, ctrl_path_pref, ctrl_file_names, hwmon_path_pref, hwmon_fn,
out_path_prefix, out_fnames):
self.is_fan_on = False
self.is_vp5_enabled = False
self.ctrl_path_prefix = ctrl_path_pref
self.ctrl_fnames = ctrl_file_names
self.hwmon_path_prefix = hwmon_path_pref
self.hwmon_fnames = hwmon_fn
self.samples_window = []
""" Number of samples for temperature averaging """
self.samples_num = 5
self.fan_cmd = {"fan_cmd_on": "0x101",
"fan_cmd_off": "0x100"}
""" Create output files """
try:
self.core_temp_out_f = open(out_path_prefix + out_fnames["core_temp_fn"], "w")
except IOError:
print "Failed to create file: '%s%s'" % (out_path_prefix, out_fnames["core_temp_fn"])
def check_files(self):
"""
Check if all files exist in the system.
"""
for key, val in self.hwmon_fnames.items():
if not os.access(self.hwmon_path_prefix + val, F_OK):
print "Failed to open sysfs file: '%s%s'" % (self.hwmon_path_prefix, val)
return False
for key, val in self.ctrl_fnames.items():
if not os.access(self.ctrl_path_prefix + val, F_OK):
print "Failed to open sysfs file: '%s%s'" % (self.ctrl_path_prefix, val)
return False
return True
def shutdown(self):
"""
Turn system off. This function will be called continuously until the system is turn off.
"""
subprocess.call(["/sbin/shutdown", "-hP", "now"])
def fan_ctrl(self, ctrl):
"""
Control fan by writing to sysfs files.
@param ctrl: can be "on" or "off" to turn fan on or off
"""
if ctrl is "on":
with open(self.ctrl_path_prefix + self.ctrl_fnames["vp5_en_fn"], "r+") as f:
""" check if +5V is active and turn it on if it is not (it should not happen) """
channels = f.read()
if channels.find("vp5") == -1:
f.write("vp5")
f.flush()
with open(self.ctrl_path_prefix + self.ctrl_fnames["gpio_fn"], 'w') as f:
f.write(self.fan_cmd["fan_cmd_on"])
f.flush()
self.is_fan_on = True
elif ctrl is "off":
with open(self.ctrl_path_prefix + self.ctrl_fnames["gpio_fn"], 'w') as f:
f.write(self.fan_cmd["fan_cmd_off"])
f.flush()
self.is_fan_on = False
else:
print "'%s': unrecognized command: '%s'" % (__name__, ctrl)
def monitor(self):
"""
Continuously read temperature and control fan.
"""
try:
while True:
with open(self.hwmon_path_prefix + self.hwmon_fnames["offset"]) as f:
offset = float(f.read().strip())
with open(self.hwmon_path_prefix + self.hwmon_fnames["raw"]) as f:
raw = float(f.read().strip())
with open(self.hwmon_path_prefix + self.hwmon_fnames["scale"]) as f:
scale = float(f.read().strip())
if raw > 4000:
raw -= 4096
core_temp = (raw + offset) * scale * SCALE_CFT
self.samples_window.append(core_temp)
if len(self.samples_window) > self.samples_num:
self.samples_window.pop(0)
samples = list(self.samples_window)
samples.sort()
avg = samples[len(samples) / 2]
if core_temp < (TEMP_FAN_ON - TEMP_HYSTERESIS) and self.is_fan_on:
self.fan_ctrl("off")
elif core_temp >= TEMP_FAN_ON and core_temp < TEMP_SHUTDOWN and not self.is_fan_on:
self.fan_ctrl("on")
elif avg >= TEMP_SHUTDOWN:
self.shutdown()
self.core_temp_out_f.seek(0)
self.core_temp_out_f.write(str(core_temp))
self.core_temp_out_f.flush()
print "Core temperature: '%f', median: '%f'" % (core_temp, avg)
time.sleep(SAMPLING_TIME)
except (KeyboardInterrupt, SystemExit):
print "Got keyboard interrupt. Exiting."
sys.exit(0)
if __name__ == "__main__":
if DEBUG:
ctrl_path_pref = ""
hwmon_path_pref = ""
out_path_pref = ""
tm = temp_monitor(ctrl_path_pref, ctrl_fn, hwmon_path_pref, hwmon_fn, out_path_pref, out_fn)
if tm.check_files():
tm.monitor()
else:
sys.exit(1)
\ No newline at end of file
SUMMARY = "Extra initscripts for the Elphel 10393 board"
DESCRIPTION = "Simple camera temperature monitor"
AUTHOR = "Elphel Inc."
HOMEPAGE = "http://www3.elphel.com/"
PRIORITY = "optional"
LICENSE = "GPLv3"
LIC_FILES_CHKSUM = "file://LICENSE;beginline=21;endline=699;md5=ccd2fef7dee090f3b211c6677c3e34cc"
SRCDATE = "20160516"
PV = "${SRCDATE}"
PR = "r0"
SRC_URI = "file://init_tempmon \
file://init_tempmon.py \
file://LICENSE \
"
S = "${WORKDIR}/"
INITSCRIPT_NAME = "init_tempmon"
INITSCRIPT_PARAMS = "defaults 96"
RDEPENDS_${PN} += "python-core"
FILES_${PN} = "\
/etc/* \
/usr/* \
"
#This needs to get the script into rc?.d/
inherit update-rc.d
do_install_append() {
install -d ${D}${sysconfdir}/init.d
install -m 0755 ${WORKDIR}/init_tempmon ${D}${sysconfdir}/init.d
for RLOC in ${PRODUCTION_ROOT_LOCATION}; do
if [ ! -d ${DEPLOY_DIR_IMAGE}/${RLOC} ]; then
mkdir -p ${DEPLOY_DIR_IMAGE}/${RLOC}
fi
if [ -f ${S}init_tempmon.py ]; then
if [ -f ${DEPLOY_DIR_IMAGE}/${RLOC}/init_tempmon.py ]; then
rm ${DEPLOY_DIR_IMAGE}/${RLOC}/init_tempmon.py
fi
cp ${S}init_tempmon.py ${DEPLOY_DIR_IMAGE}/${RLOC}/init_tempmon.py
else
echo "NOT 3 FOUND!"
fi
done
}
PACKAGES = " init-tempmon"
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