On Mon, Jul 18, 2011 at 13:47, Alessio Sangalli wrote:
On 07/18/2011 10:38 AM, Mike Frysinger wrote:
On Sat, Jul 16, 2011 at 19:18, Alessio Sangalli wrote:
Hi, is there a tool to create an "environemnt image" that I can flash to my NAND?
tools/envcrc will output the binary env blob if you give it the --binary option. but it does not take arbitrary env inputs. ./tools/envcrc --binary > env.bin
In the meanwhile I've written my own utility, but I do not understand the "it does not take arbitrary env inputs".
tools/envcrc atm only outputs the default env that the board is configured for. you cant give it a text representation of the env and have it calc things.
although thinking about it a bit more, you probably could do it in shell. (cat <env file> | tr '\n' '\0' ; dd if=/dev/zero count=1 ibs=1) > env.bin env_size=8192 pad_size=$(( env_size - $(set -- $(du -b env.bin); echo $1) - 4)) dd if=/dev/zero ibs=$pad_size count=1 | tr '\0' '\377' >> env.bin
and then you get the crc and prepend the 4 bytes crc env.bin
sounds like it might be a useful addition to tools/envcrc
I could not find it so I rewrote such functionality. If you want, I could extract the relevant part of the code and send it to you. It's quite trivial once I figured out how the U-Boot environment works.
extending tools/envcrc to take a --file option and use that rather than the linked in default would be cool imo. -mike