Let me add my $.02. I have a request to be able to boot a USB drive. So, reading a GPIO pin and making a decision in a script is a desirable thing. Certainly a 'MD 0x12345678' can read a pin but then making a decision in an environment string chain would help. Can we do this? On Mar 28, 2011 1:57 AM, "Rogan Dawes" <ro...@dawes.za.net> wrote: > Hi folks, > > I'm wondering if there is any support in u-boot for reading the state of > a GPIO input (i.e. button) to control the sequence of boot events? > > i.e. my board has a reset button, can I read its state to determine > whether to try to TFTP-boot a new kernel, or to boot the existing one in > flash? > > I did try to grep the sources for any hints, but did not find anything. > I may have been looking in the wrong place, of course! > > Thanks, > > Rogan > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot
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