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Well, my first idea for this thread was to do a poll, but I'm not sure that is flexible enough for the information that I want, so I will just have to tally up answers in the end...
As some of you know, I have been trying to put the finishing touches on some custom firmware for the M2-atx power supply. You can follow the progress here:
In hopes of making the firmware absolutely as awesome as it can be, I would like to determine the most frequent timing modes that people want, because my code is flexible enough to easily make it do whatever we want as far as timing is concerned.
I have included all of the original timing modes that the original M2 code has, in chronological order from powering on the pc:
- ampdelay: time from powering on pc to turning on amp through J6 to prevent thumping
- autolatch: time from powering on pc to when M2 will detect ignition low for shutdown, used to allow pc to completely boot properly in case car is turned on and off in short amount of time
- offdelay: time between ignition going low (after autolatch) and M2 sending button press to mobo to signal shutdown, used to potentially allow car to be off for short times without shutting down the pc
- hard-off: time between turning off main power rails and turning off 5V standby rail to conserve power.
I also added one more delay in the code that does exist in the original in a slightly different way... I don't think it needs to be user-configurable with the jumpers but I am interested in input as to how long it should be:
- shutdown: this delay is counted between the time the button is pressed to shut down the pc and the time that power is removed from the main power rails if the motherboard does not indicate that it shutdown properly...it is used to keep the pc from draining the battery if it hangs during shutdown
So let me know what timings would work best for you! I will compile the responses into the options that require the fewest jumpers in the code!
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Here are my preferences:
ampdelay: 10 seconds... I plan to have a fast booting linux build
autolatch: 60 seconds... shouldnt be long enough to have much effect on the battery but system should never take longer to boot than that for ANY reason
offdelay: 5 seconds... I don't plan on ever keeping the computer on when the car is off but that should be long enough to turn the key back on if I change my mind and dont want the computer to turn off
hard-off: 1 minute... I don't need the 5V standby because I don't plan on using sleep mode
shutdown: 60 seconds... I figure that if it hasn't shut down in 60 seconds, something is terribly wrong
On that note, can someone confirm for me whether hibernate mode requires 5V standby power? I can imagine that people who use hibernate or sleep mode for resuming quickly may need a hard-off NEVER option, which shouldn't be a problem to put in... I just need to decide which jumper settings would disable the hard-off timer.
EDIT: credit to WuNgUn for his info in this thread:
It looks like standby and sleep require 5V standby and hibernate does not... So the hard-off delay needs to be set for NEVER if you want to use standby or sleep. Does anyone use standby or sleep mode with their carpc???
The only alteration I want is instant on instead of the 5 second delay - and also instant hibernation or, 1-2 second.
I believe that means after a certain many of hours it takes the machine out of hibernate and fully shuts it down correct? at least that's what I always thought it did. I'm not sure what mine is set to currently, but I have no issues with the current m2-s setup for this feature.
I request a 1-2 second off delay because I don't know how system fully works during an engine crank, if the m2 can survive the crank, i wouldn't need a 1-2 second delay- i only thought that it might die if the power is cut for that split second.
I would like my computer to wake on a door ajar signal. I'd like a 5 minute window between door closed and ignition on to hold power. Is that autolatch? I'd also like it to hold standby for 3 hours after ignition off before shutdown. Sorry, pretty fuzzy yet on the details.
If I'm not mistaken if your computer is in full hibernate mode it should not use any power since all the ram is save to your hard disk and booted from there.
Coming out of hibernate, the computer has to boot up. Whatever you had in RAM is reloaded from the hard drive. You save a couple seconds of re-opening files and loading hardware only. I want standby where the computer is already booted with my MDX and RR ready and waiting.