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This is a small tool that creates an environment image for U-boot.
It can be compiled both as a part of U-boot (using host compiler) and
stand alone. The tool is intended to run on the host and not the target.
Syntax:
./mk_envimg [-d] output_file [input_file]
When invoking the program, input arguments can be specified.
* -d : debug mode, adds debug printouts
* output_file : specify the name and location of the outpout
* input_file : input configuration file (optional)
The output file is an ordinary environment binary with a crc32 sum
followed by the environment variables
By default this tool will create an image with the default environment
variables as built-in in U-boot.
If an input file is specified it will remove, modify and/or remove
default environment variables.
Input file examples:
* Add a new variable -> write the new variable and its value:
an_new_variable=a_new_value
* Remove the variable bootargs -> write its name without a value:
bootargs
* Modify the variable bootargs -> write its name with a new value:
bootargs=a_new_value
* Comments -> add # at the beginning of the line
# This is a comment
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