Le 25/02/2011 22:44, Bob Feretich a écrit : > For the BeagleBoard, the pins of interest are the ones routed to the > Expansion, J4, and J5 connectors. I am working with a local university. > Students are building projects that interface to these connectors. > Usually, the Linux boot delay is not a concern, but depending on the > project, sometimes the pins need to be initialized before a "set time > interval after power-on" expires (We can set the power-on reset delay to > several hundreds milliseconds, but the time must be bounded.)
Can you not simply set this time high enough that the U-Boot script executes? > By having the spot (beagle.c& beagle.h) in u-boot, where we can add our > I/O Pin Mux initialization code, we can satisfy the needs of a bounded > I/O initialization time. Out of sheer curiosity (I've done some lab teaching in assembly language and device control in a previous life), what are those IOs that have such a bounded set-up time relative to power-on in a university project? If you are willing to answer but find that's really not related to U-Boot, we can discuss this in private. > Regards, > Bob Feretich Amicalement, -- Albert. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
