Many thanks Jesse for this new that's I need for my project. Like your
new solution with TS-BAT3, In my application, I've to cut the power in
most time , and wake-up to make measurment. I've develop a low power
control board wich manage the switch-on, witch-off, the wake-up
events, etc...
The constraint are :
- the boot time acquisition (have to be less 5s)
- the global boot time (to save power)
- the global shutdown time (to save power)
So the solution is I think :
- fast boot time : fast bootloader + not using debian + light init
- ramdisk linux : no need umount, faster load
So many thank for this new ts7300 development
--- In "Jesse Off" <> wrote:
>
> Its worth mentioning that even though 1.69 seconds is pretty good
> for Linux its still a miserable long time compared to most RTOS.
> For instance, eCOS (the real-time operating system that RedBoot runs
> on) and Windows CE are up and ready to run applications in
> milliseconds after power-on. With these types of systems the BIOS
> initialization time becomes the weak link for "instant-on" designs.
> The TS-7300 bootup firmware was designed to be much faster than a
> x86 PC/SBC BIOS so even better bootup times can be acheived with an
> RTOS.
>
> Part of these optimizations on Linux were done for applications of
> the new TS-BAT3 PC104 board we designed. Basically, this board is a
> battery backup board that one can program to turn off the system and
> have it come back on (with or without external power) at an
> arbitrary time. Several applications of this are remote sensors
> where the SBC only has to be online every 5 minutes or so just long
> enough to check a sensor or two and go back to sleep. Checking a
> sensor may take only .01 seconds of CPU time most of the time. Your
> bootup time quickly becomes where the bulk of your battery/saved
> solar power is spent-- even at 1.69 s, 99% of your power was spent
> by Linux and firmware bootup boilerplate and not your code. Of that
> 1.69 s, about 1.4 represents fair game for optimization (Linux
> bootstrap) and about .3 of it is the hardware init.
>
> //Jesse Off
>
>
>
> --- In "Don W. Carr" <doncarr@> wrote:
> >
> > Wow, thanks. That is just what I need! Great to see all of the
> inovations
> > possible because you are using Linux. Good to see that development
> is very
> > active. Don.
>
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