Add temperature monitoring script (f7dc5d36) · Commits · Elphel / meta-elphel393

recipes-core/images/core-image-elphel393.bb

+1 −1

Original line number	Diff line number	Diff line
		@@ -31,7 +31,6 @@ IMAGE_INSTALL_append += " python-core \
		libsjs \
		smartmontools \
		libogg \
		init-elphel393 \
		apps-camogm \
		apps-imgsrv \
		iw \
		@@ -39,6 +38,7 @@ IMAGE_INSTALL_append += " python-core \
		dhcp-client \
		linux-firmware-rtl8192cu \
		init-elphel393 \
		init-tempmon \
		"

		#kernel-modules

recipes-core/init-tempmon/files/LICENSE

0 → 100644

+1499 −0

File added.

Preview size limit exceeded, changes collapsed.

recipes-core/init-tempmon/files/init_tempmon

0 → 100644

+45 −0

Original line number	Diff line number	Diff line
		#!/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

recipes-core/init-tempmon/files/init_tempmon.py

0 → 100755

+171 −0

Original line number	Diff line number	Diff line
		#!/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

recipes-core/init-tempmon/init-tempmon_1.0.bb

0 → 100644

+55 −0

Original line number	Diff line number	Diff line
		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"

Admin message