If i screwed the entry address of a 32bit ROM....
Posted: Sat Sep 04, 2010 11:51 amHi there, I'm working on a realtime timing tuning tool, after lots of study and research, it is time to do some tests on a living car.
what am i talking about is a 32bit dbw rom.
My plan is:
1. hijack the entry address of the rom, aka the first 4 bytes of a rom.
2. ECU will jump to my code when it is booting.
3. do some patching jobs, after jobs done, jump back to the original entry address.
it is definite that i will make mistakes during debugging. my problem is, if i hung the ecu with some error code, is it possible i can reflash the ecu?
Will the flash process use the ROM code? or is it running in a programming mode when flashing or what?
what am i talking about is a 32bit dbw rom.
My plan is:
1. hijack the entry address of the rom, aka the first 4 bytes of a rom.
2. ECU will jump to my code when it is booting.
3. do some patching jobs, after jobs done, jump back to the original entry address.
it is definite that i will make mistakes during debugging. my problem is, if i hung the ecu with some error code, is it possible i can reflash the ecu?
Will the flash process use the ROM code? or is it running in a programming mode when flashing or what?