sorry if this is off-topic, but I am assembling my carputer and have no real world experience, so the answer to my following question will effect how I answer the topic question.
Can someone point me to, or explain how exactly the off dealy and hard off work. For example, if i have a off-delay of 30 minutes I can stop, get gas and not have my carputer power off correct?
If i have an off delay of 10 seconds, and hard off of 30 minutes and I get out pump gas and then turn the car back on am I booting from hibernate because I've surpassed off-delay? What exactly is the 5v doing and why would I want to keep it on when turning off my car?
What happens when I turn the car on and have surpassed both off-delay and hard off?
Finally if I have turned off the car and have a 30 minute off delay setting, and my computer is still running; I'm assuming my music is also still playing? So i get back in the car and I'm now on track 12 when I stopped my car to pump gas on track 10?
Again not trying to thread jack, you can pm the answer if you'd like and delete my post.
The hard-off delay is a timer between when the psu removes power from the main power rails (5V, 12V 3.3V) after the pc shuts down and when the psu removes power from the 5V standby rail. Normally, ATX power supplies always supply 5V standby power to the motherboard when they are plugged in (and the rocker switch on the psu is on). Because this application gets its power from a car battery, most car psu's have the ability to turn off the 5V standby rail to minimize power consumption.
As far as I know, the only reason you would need the 5V standby to remain on is if you want to use standby or sleep modes, which require the 5V standby power to power the RAM. Otherwise, I am not sure why you would want the 5V standby power to remain on for long periods of time. Perhaps someone who has a use can chime in???
If you have surpassed the hard-off timer and you turn your car on, the psu first turns on the 5V standby rail, then sends a simulated button press to the motherboard and then powers up as normal... either from hibernate if you use that or from cold boot if you dont.
But back on topic a bit... :) What power mode are you interested in using and what timings do you imagine would be best? Sleep/standby with hard-off NEVER? Or hibernate with hard-off 1min? How about offdelay timing?
I need to test my system in the real world more, but I'd say 1/2 hour delay and 1 hour hard off...
OK, based on some good input in the main thread about my firmware, I am looking into making the battery threshold voltage adjustable with the jumpers to try and be more effective at preventing situations where the battery is too low. In order to do that, I have to decrease the potential number of timing options... So I have a couple of questions for everyone:
If you use standby or sleep, you need 5V standby to stay on for long periods of time... Are there any situations where you would need the 5V standby on if you are not using standby mode in the OS? In other words, is there any reason to have a hard-off time other than 1 minute (for hibernate or shut down) or NEVER (for standby)?
Some people like to leave their pc on while they run into the gas station or store or something... Other people want it to shut down when they turn the car off. Is there any reason to have an off-delay other than 5 seconds (if you shut down immediately) or 15 minutes (if you want to run into the store)?
Is there any reason to have an amp-delay other than 10 seconds? Does the thump occur when power is put to the motherboard or when something happens when loading the OS?
Is there any reason to have an autolatch other than 60 seconds? If your computer boots faster than that, is it inconvenient to have it stay on for a few more seconds if you turn your car off quickly?
Any input you can give me would greatly be appreciated!
oops i mean hibernate