Hi Toni;
I think I have it figured out.
I have an image that works and one that doesn’t.
Watchdog Not enabled:
Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l
GNU/Linux
Watchdog enabled:
Linux beaglebone 3.8.13-bone50 #1 SMP Tue May 13 13:24:52 UTC 2014 armv7l
GNU/Linux
Image “bone47” works like yours does. Clean shutdown with no reboot and no
“watchdog enabled” boot message.
It would appear that this was changed by version “bone50” <sigh>
Thanks to Google, I found a code snippit, that should work.
====================================================
dev = WATCHDOGDEV;
/* Once the watchdog device file is open, the watchdog will be activated by
the driver */
fd = open(dev, O_RDWR);
if (-1 == fd) {
fprintf(stderr, "Error: %s\n", strerror(errno));
exit(EXIT_FAILURE);
}
/* The 'V' value needs to be written into watchdog device file to indicate
that we intend to close/stop the watchdog. Otherwise, debug message
'Watchdog timer closed unexpectedly' will be printed
*/
write(fd, "V", 1);
/* Closing the watchdog device will deactivate the watchdog. */
close(fd);
======================================================
I just have to run it after login (I think).
Later;
Bill
"No one could make a greater mistake than he who did nothing because he could
do only a little."
"All that is necessary for the triumph of evil is that good men do nothing"
Edmond Burke (1729 - 1797)
http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book
http://ca.linkedin.com/pub/bill-pretty/2b/b07/602
From: [email protected] [mailto:[email protected]] On
Behalf Of toni incog
Sent: Sunday, March 01, 2015 3:11 PM
To: [email protected]
Subject: [beagleboard] Re: Enable / disable watchdog timer ?
Ok, when I powered up with 5V and usb-otg connected to pc and I shortly press
the power button I can replicate: clean shutdown and instant reboot
Don't know where the reboot is coming from.
here's pmic:
[ 2.897350] input: tps65217_pwr_but as
/devices/ocp.3/44e0b000.i2c/i2c-0/0-0024/input/input0
wrt. watchdog: I assume you mean /dev/watchdog I don't think I have it active.
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