Radarcape:Watchdog - Revision history

imported>Beastadmin at 17:40, 22 July 2016

2016-07-22T17:40:03Z

← Older revision		Revision as of 17:40, 22 July 2016
Line 10:		Line 10:
	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot. The AM3335 internal watchdog is not sufficient for such cases as it can only become activated after Linux has booted, so early faults would not be covered then.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot. The AM3335 internal watchdog is not sufficient for such cases as it can only become activated after Linux has booted, so early faults would not be covered then.

	The watchdog listens on ~~GIPO_60~~ of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. ~~GIPO_60~~ must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of ~~GIPO_60~~ is usually being done by the Radarcape softawre (rcd). The very first timeout after power-on is 2 minutes, which leaves plenty of time for even reflashing the whole eMMC card.		The watchdog listens on GPIO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GPIO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GPIO_60 is usually being done by the Radarcape softawre (rcd). The very first timeout after power-on is 2 minutes, which leaves plenty of time for even reflashing the whole eMMC card.

	==Manual Hardware Watchdog Toggling==		==Manual Hardware Watchdog Toggling==

	In certain situations it becomes necessary to temporarily stop or even de-install the Radarcape daemon. It then is necessary to toggle ~~GIPO_60~~ by other ways to hinder the hardware watchdog from rebooting the Radarcape. This can be achived using the following script:		In certain situations it becomes necessary to temporarily stop or even de-install the Radarcape daemon. It then is necessary to toggle GPIO_60 by other ways to hinder the hardware watchdog from rebooting the Radarcape. This can be achived using the following script:

	<source lang="bash">		<source lang="bash">
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	echo *** Configure Watchdog retrigger pin & toggle first time		echo *** Configure Watchdog retrigger pin & toggle first time

	# Setup ~~GIPO~~ multiplexer (old firmware releases only)		# Setup GPIO multiplexer (old firmware releases only)
	if [ -e "/sys/kernel/debug/omap_mux/gpmc_ben1" ]		if [ -e "/sys/kernel/debug/omap_mux/gpmc_ben1" ]
	then		then
Line 27:		Line 27:
	fi		fi

	# Export ~~GIPO_60~~ to /sys filesystem		# Export GPIO_60 to /sys filesystem
	echo 60 > /sys/class/gpio/export		echo 60 > /sys/class/gpio/export

	# Set ~~GIPO_60~~ direction to output		# Set GPIO_60 direction to output
	echo out > /sys/class/gpio/gpio60/direction		echo out > /sys/class/gpio/gpio60/direction

Line 54:		Line 54:

	'''F:''' The message ''write error: Device or resource busy'' appears when I execute ''echo 60 > /sys/class/gpio/export''. What shall I do?<br>		'''F:''' The message ''write error: Device or resource busy'' appears when I execute ''echo 60 > /sys/class/gpio/export''. What shall I do?<br>
	'''A:''' In this case ~~GIPO_60~~ has already be exported to the /sys file system. You can unexport it by typing ''echo 60 > /sys/class/gpio/unexport''?		'''A:''' In this case GPIO_60 has already be exported to the /sys file system. You can unexport it by typing ''echo 60 > /sys/class/gpio/unexport''?

imported>Dl4mea at 04:01, 7 July 2016

2016-07-07T04:01:44Z

← Older revision		Revision as of 04:01, 7 July 2016
Line 8:		Line 8:
	=Hardware Watchdog Overview=		=Hardware Watchdog Overview=

	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot. The AM3335 internal watchdog is not sufficient for such cases as it can only become activated after Linux has booted, so early faults would not be covered then.

	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape softawre (rcd). The very first timeout after power-on is 2 minutes, which leaves plenty of time for even reflashing the whole eMMC card.		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape softawre (rcd). The very first timeout after power-on is 2 minutes, which leaves plenty of time for even reflashing the whole eMMC card.

imported>Dl4mea at 03:59, 7 July 2016

2016-07-07T03:59:46Z

← Older revision		Revision as of 03:59, 7 July 2016
Line 10:		Line 10:
	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot.

	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape ~~daemon~~ (rcd).		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape softawre (rcd). The very first timeout after power-on is 2 minutes, which leaves plenty of time for even reflashing the whole eMMC card.

	~~'''Caution:'''<br>~~
	~~GIPO_60 must be toggled by software at least once every minute otherwise~~ the ~~Radarcape reboots! This can be problematic if you operate the Radarcape at a remote location without direct hardware access~~.


	==Manual Hardware Watchdog Toggling==		==Manual Hardware Watchdog Toggling==

	In certain situations it becomes necessary to temporarily stop or de-install the Radarcape daemon. It ~~becomes~~ necessary to toggle GIPO_60 to hinder the hardware watchdog from rebooting the Radarcape. This can be achived using the following script:		In certain situations it becomes necessary to temporarily stop or even de-install the Radarcape daemon. It then is necessary to toggle GIPO_60 by other ways to hinder the hardware watchdog from rebooting the Radarcape. This can be achived using the following script:

	<source lang="bash">		<source lang="bash">

imported>Beastadmin at 18:20, 6 July 2016

2016-07-06T18:20:14Z

← Older revision		Revision as of 18:20, 6 July 2016
Line 8:		Line 8:
	=Hardware Watchdog Overview=		=Hardware Watchdog Overview=

	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The ~~hardware watchdog~~ shall ~~ensure that~~ the Radarcape ~~recovers if~~ the ~~system~~ software hangs. This is especially important if the Radarcape is operated at remote locations.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The watchdogs shall reboot the Radarcape in the case that the software hangs. This is especially important if the Radarcape is operated at remote locations or without a human operator available for a manual reboot.

	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If ~~no toggling of the port happend~~, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If GIPO_60 has not been toggled within 1 minute, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).

	'''Caution:'''<br>		'''Caution:'''<br>

imported>Beastadmin at 18:15, 6 July 2016

2016-07-06T18:15:54Z

← Older revision		Revision as of 18:15, 6 July 2016
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	do		do
	echo 1 > /sys/class/gpio/gpio60/value		echo 1 > /sys/class/gpio/gpio60/value
	sleep 10		sleep 15
	echo 0 > /sys/class/gpio/gpio60/value		echo 0 > /sys/class/gpio/gpio60/value
	sleep 20		sleep 15
	done		done
	</source>		</source>

	The toggling loop can also be typed as one-liner:		The toggling loop can also be typed as one-liner:
	<source lang="bash">while :; do echo 1 > /sys/class/gpio/gpio60/value; sleep 10; echo 0 > /sys/class/gpio/gpio60/value; echo 'Hit CTRL+C to exit'; sleep 20; done</source>		<source lang="bash">while :; do echo 1 > /sys/class/gpio/gpio60/value; sleep 15; echo 0 > /sys/class/gpio/gpio60/value; echo 'Hit CTRL+C to exit'; sleep 15; done</source>

imported>Beastadmin at 18:15, 6 July 2016

2016-07-06T18:15:16Z

← Older revision		Revision as of 18:15, 6 July 2016
Line 13:		Line 13:

	'''Caution:'''<br>		'''Caution:'''<br>
	''GIPO_60 must be toggled'' by software at ''least once every minute'' otherwise the ''Radarcape reboots''! This can be problematic if you operate the Radarcape at a remote location without direct hardware access.		GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots! This can be problematic if you operate the Radarcape at a remote location without direct hardware access.

imported>Beastadmin at 18:14, 6 July 2016

2016-07-06T18:14:58Z

← Older revision		Revision as of 18:14, 6 July 2016
Line 13:		Line 13:

	'''Caution:'''<br>		'''Caution:'''<br>
	GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. This can be problematic if you operate the Radarcape at a remote location without direct hardware access!		''GIPO_60 must be toggled'' by software at ''least once every minute'' otherwise the ''Radarcape reboots''! This can be problematic if you operate the Radarcape at a remote location without direct hardware access.

imported>Beastadmin at 18:14, 6 July 2016

2016-07-06T18:14:20Z

← Older revision		Revision as of 18:14, 6 July 2016
Line 12:		Line 12:
	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).

	'''Caution:''' GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. This can be problematic if you operate the Radarcape at a remote location without direct hardware access!		'''Caution:'''<br>
			GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. This can be problematic if you operate the Radarcape at a remote location without direct hardware access!


	==Manual Hardware Watchdog Toggling==		==Manual Hardware Watchdog Toggling==

imported>Beastadmin at 18:14, 6 July 2016

2016-07-06T18:14:06Z

← Older revision		Revision as of 18:14, 6 July 2016
Line 10:		Line 10:
	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The hardware watchdog shall ensure that the Radarcape recovers if the system software hangs. This is especially important if the Radarcape is operated at remote locations.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The hardware watchdog shall ensure that the Radarcape recovers if the system software hangs. This is especially important if the Radarcape is operated at remote locations.

	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin.		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin. GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).

	~~'''Attention:'''~~ GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots.

	Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).

			'''Caution:''' GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. This can be problematic if you operate the Radarcape at a remote location without direct hardware access!

	==Manual Hardware Watchdog Toggling==		==Manual Hardware Watchdog Toggling==

imported>Beastadmin at 18:11, 6 July 2016

2016-07-06T18:11:26Z

← Older revision		Revision as of 18:11, 6 July 2016
Line 10:		Line 10:
	Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The hardware watchdog shall ensure that the Radarcape recovers if the system software hangs. This is especially important if the Radarcape is operated at remote locations.		Starting with the 2nd production Batch, the Radarcape is equipped with a MAX6371 hardware watchdog. The hardware watchdog shall ensure that the Radarcape recovers if the system software hangs. This is especially important if the Radarcape is operated at remote locations.

	The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin. ~~Therefore,~~ GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots. Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).		The watchdog listens on GIPO_60 of the BeagleBone board for a toggling signal. If no toggling of the port happend, the BeagleBone board is being reset via the SYS_RESET pin.

			'''Attention:''' GIPO_60 must be toggled by software at least once every minute otherwise the Radarcape reboots.

			Toggling of GIPO_60 is usually being done by the Radarcape daemon (rcd).


	==Manual Hardware Watchdog Toggling==		==Manual Hardware Watchdog Toggling==

	In certain situations it becomes necessary to temporarily stop or de-install the Radarcape daemon. It becomes necessary to toggle GIPO_60 to hinder the hardware watchdog rebooting the Radarcape. This can be achived using the following script:		In certain situations it becomes necessary to temporarily stop or de-install the Radarcape daemon. It becomes necessary to toggle GIPO_60 to hinder the hardware watchdog from rebooting the Radarcape. This can be achived using the following script:

	<source lang="bash">		<source lang="bash">