Disable watchdog for Digital Outs on RevPi Compact

Topics about the Software of Revolution Pi
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FabianRedox
Posts: 2
Joined: 28 May 2024, 23:18

Disable watchdog for Digital Outs on RevPi Compact

Post by FabianRedox »

Hi all,

the RevPi Compact has an Watchdog on the digital output pins. That means, every 9 ms you have to write the gpio state again to high, if you dont want the watchdog to set it back to low again.

This watchdog is too sensitive for our use-case. I would like to increase the time or disable the watchdog but I cannot find any documentation on that.

Background: I am writing a service for all the IOs of the revPi Compact but it is not fast enough to handle all GPIOs simultaneously within 9 ms. Yes I know, I can work on the performance, adapt the architecture, and be more efficient.. But I dont want to. 9 ms is too sensitive, and I would like to have control over the watchdog. Please help!
FabianRedox
Posts: 2
Joined: 28 May 2024, 23:18

Re: Disable watchdog for Digital Outs on RevPi Compact

Post by FabianRedox »

I know that some watchdog is active:

pi@RevPi52152:/dev $ dmesg | grep -i watchdog
[ 2.972291] bcm2835-wdt bcm2835-wdt: Broadcom BCM2835 watchdog timer
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dirk
KUNBUS
Posts: 2001
Joined: 15 Dec 2016, 13:19

Re: Disable watchdog for Digital Outs on RevPi Compact

Post by dirk »

Hi FabianRedox, thank you for your patience. Unfortunately, it is impossible to deactivate the watchdog without hardware modifications.
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