On Thu, Mar 28, 2013 at 12:52:04PM +0800, Dashi Cao wrote: > Hi all, > I have got a Beagleboard-xm, and I'm feeling that saving environment > variable is an issue because this board has no NAND. > > U-Boot supports environment variable file located in a FAT file system. > So I set out and made a new board omap3_beagle-xm, copied from > omap3_beagle, but with environment file on the FAT of the microSD. > > I'm not sure if I'm just reinventing the wheel!
An interesting concept and one I've thought about doing myself at some point, so thanks! There's a better way to do this however. You can have boards.cfg take a base config file (say omap3_beagle) and add additional defines (say CONFIG_ENV_IS_IN_FAT) for a specific build target (omap3_beagle_env_fat) and not have to copy all of the other files. Then just modify omap3_beagle.h with: #ifdef CONFIG_ENV_IS_IN_FAT #undef CONFIG_ENV_IS_IN_NAND #define FAT_FILE ... ... #endif And be set, more or less. And don't re-use the name uEnv.txt please. How about u-boot-env.txt ? And we shouldn't need to populate to start with, I hope at least, it should just be OK until the first saveenv happens. -- Tom
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