Hello, all! Detlev, thank for oyur reply. So I don't need environment file parser any more.
But now I have new question - how can I display a Bitmap picture on the board's LCD? I know there is the "bmp" command, but how should I configure and build U-Boot to have this command in prompt? My board is OMAP3EVM. Thank you. On Thursday 30 July 2009 19:29:27 you wrote: > Hi Tuma, > > > Hello All! > > Hiya. > > > I develop some "upgrade" tool based on the U-Boot booted from SD card. > > I want to boot from SD card, and execute some simple script which is > > stored in bootcmd environment variable: > > "echo Hello! ; mmcinit ; sleep 10 ; reset; " etc... > > So I need to generate some environment file. > > Sorry, but I do not understand why you need to generate an environment > image if you only eant to run some scripts. Can we please step back > again and talk about what you want to achieve? Pretty likely there is a > different and cleaner solution to your problem. > > > I find source from tools/env very > > useful (I try to get variables from correct file I already have), but I > > can't find any description of environment file (or flash partition) at > > all (which I need to write tool for generating environment file). > > Can someone explain me the structure of the file, please. > > Something like: > > 0-4 - CRC > > Well the problem is that environment can be in a different format, > depending on configuration options. If for example you enable redundand > environments, you will have another byte after the crc signalling which > of the two copies is the active one. > > > 5-... - (Environment)\0(Environment)\0... > > ... Environment End Mark... > > and so on. > > > > Or tell me in what file should I see from U-Boot source. > > A good start would be to read /include/environment.h - but only after > you are really sure that you want to generate an environment after all > > :) > : > > And is there any difference between content of OneNAND flash > > environment-partition and file on SD card? > > I can parse the sentence syntactically, but I have no clue what you are > asking here... > > Cheers > Detlev -- Software Developer General Satellite Corp. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
