23 Oct
2009
23 Oct
'09
10:52 a.m.
I'd like to have a boot cmd which says
"if my test server is there, download uImage from it, otherwise boot from the MMC card."
I can do that by starting with a ping, and waiting for it to fail, but it takes 10 seconds, which is way too much to add to the normal boot process.
The timeout appears to be set by a line in net.h reading
NetSetTimeout (10UL * CFG_HZ, PingTimeout);
Questions then:
Is there a better way to quickly check for the presence of a server? Actually trying TFTP seems to take even longer.
Would it be a good enhancement to u-boot to have an environment variable which changes the ping timeout when it exists?
David Collier
www.dexdyne.com