LEGO distributes the NXT firmware as binary also as source code. I installed the free IAR compiler toolchain (v4.42) and tried to compile this source code.
There are two workbench-files (LMS-ARM and LMS-V02) which produce slightly different binaries. Even worse none of those binaries is equal to the binary delivered by LEGO. I know the file system is added at the original firmware - I already cut that part of. It still differs.
Why are they different? How can I get exactly the LEGO binary? What compiler is LEGO using? Really the "old" 4.42 or did they upgrade to 6.??
Thank you for the answers
Bye marvin
Bye Marvin
- "I think you ought to know I'm feeling very depressed." - (Android Marvin in "The Hitchhiker's Guide to the Galaxy" by Douglas Adams, 1978)
I tried to compile the source code with different options and found things out:
v1.29: Compiled by LEGO (delivered version) = 0x22050 bytes binary
Compiled by LEGO (LMS_V02.rfw file in source) = 0x21164 bytes binary
Compiled by me with the delivered lib = 0x21114 bytes binary
Compiled by me with the 4.42 lib = 0x21684 bytes binary
The difference is about 3900 bytes which is a bit much for a little difference...
v1.05: Compiled by LEGO = 0x20BB4 bytes binary
Compiled by me with v1.29-delivered lib = 0x1DA40 bytes binary
Compiled by me with the 4.42 lib = 0x1DE04 bytes binary
The difference is about 12000 bytes here!!!
v1.28 Enhanced:
No difference. Only some bytes are changed - I think date and time based bytes.
Did anyone use a self-compiled version?
If yes - is there any different behaviour to the "original" version?
A question to John: Do you know why there is this difference?
Bye - marvin
Bye Marvin
- "I think you ought to know I'm feeling very depressed." - (Android Marvin in "The Hitchhiker's Guide to the Galaxy" by Douglas Adams, 1978)
