i.MX Processors中的主题 Re: How to cause a WDOG1

How to cause a WDOG1

francescocamard — Thu, 19 Nov 2015 10:49:54 GMT

Hello,

I have a Sabre Auto Info based on imx6q booting from eMMC on the SD slot and I am monitoring the WDOG1_B signal for any anomalous boot issue. The linux BSP is poky.

The watch dog timer seems to be correctly enabled since I was already able to reboot the system using:

cat /dev/watchdog

insetad also removing the eMMC in the SD adapter during on phase the WDOG1_B dosen't reboot the board, what am I missing?

Thanks & Regards,

Francesco

Re: How to cause a WDOG1

igorpadykov — Fri, 20 Nov 2015 10:12:30 GMT

Hi Francesco

for reliable wdog operation it may be recommended to perform

whole board reset (along with pmic), as it is done on Sabre schematic

SPF-27392 p.21 : WDOG_B, U507, PWRON

Best regards

igor

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Re: How to cause a WDOG1

francescocamard — Mon, 23 Nov 2015 09:47:57 GMT

Hi Igor,

is the schematich for SD? I am using AI board.

I installed the watchdog pacakge enable the deamon load on runlevel 5 during power on and now i would like to test if it's working... simulating a some fail (removing/sata cable or sd card) and I would like to see the WDOG1_B go low to reset the board. Am I misinterpretating how it's work? I tested the "cat /dev/watchlog" and it's reboot the board w/o toggling the WDOG1_B

Thanks,

Francesco