Thanks, very helpful info.<div><br></div><div>Looks like I may have to do something light weight like ecos.</div><div>I believe redboot is based on ecos so there may be a starting point there for the i.mx27.</div><div><br>
</div><div>Regards</div><div>Geoff</div><div><br><br><div class="gmail_quote">On Mon, Mar 28, 2011 at 6:46 PM, Sascha Hauer <span dir="ltr"><<a href="mailto:s.hauer@pengutronix.de">s.hauer@pengutronix.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi Geoff,<br>
<div class="im"><br>
On Mon, Mar 28, 2011 at 01:25:18PM +1000, Geoff Smith wrote:<br>
> Apologies for the newbie question. I am looking for a fastboot option for<br>
> the i.MX27<br>
><br>
> I want to be capturing video data from a cold start within 300ms (preferably<br>
> 200ms).<br>
<br>
</div>The best I could get out of an i.MX27 was about 700ms. The main limiting<br>
factor is how fast you can load an image from the boot medium (Nand<br>
flash in my case). Given that I can read from Nand with 16MB/s a 5MB<br>
image takes about 300ms to load. I think you'll need many dirty tricks<br>
doing this with Linux, like a massively stripped down kernel and perhaps<br>
starting the capture in the kernel (not in the application).<br>
<br>
I wouldn't say it's not possible, but it's definitely a hard task.<br>
<br>
Sascha<br>
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