Micrmonitor (Umon bootloader) for booting an application

Hiiiii ,

I am able to flash the Micromonitor on Flash memory and able to boot it up on a board which has ColdFire as its heart. But, the Umon is not completely loaded. :(

But, It goes into a State of Monitor that is not normal. That is it does not match the INITIALIZE condition (This i found when i traced through the code to find the reason for exception). Why does it happen ?

But, anyhow the prompt 'uMon>' comes correctly.

Further, when i try to integrate the application with the Umon -> That is calling the application .elf file sequentially after the loading of the umon by changing the source code, I find that the Application is not getting loaded completely and it is not getting invoked properly. It shows the errors like :

MALLOC Error : Heap Corrupted at Entry 0

- MALLOC Error : Heap Corrupted at Entry 16

Kindly share some info / solutions with me with respect to these above issues.

Tons of Thx in advans, Karthik Balaguru

Karthik, Sounds like your uMon port isn't complete. Did you figure out why the initial state isn't correct? No sense going further until that's resolved. This is probably best discussed on the MicroMonitor email list. Ed

Hi Ed Sutter,

Yes, i have solved that initialisation issues . Your info was really very helpful to me. Thankyou for your info. Now, I am into integration of the application with the Umon and resolving some issues w.r.t it.

Thankyou for the responses in the Micromonitor mail list.

For the above , I had cygwin environment for porting Umon and that looks almost fine now .

Now i am playing with Compilation of Umon in Code warrior environment so that it would be easy for debugging. I have resolved the compilation issues.

But, i would like to know the critical things that i need to take into consideration as there might be compiler dependencies that may hit at later stage in the effective functionality of Umon .

Have you tried in Codewarrior environment and have some info with respect to it.

Kindly share some info w.r.t the above stuffs. Thanks and Warm Regards, Karthik Balaguru

Hi Ed Sutter,

I am able to compile/link the Umon well in Codewarrior environment now. I think, this would ease the debugging the integration of the application with Umon on Coldfire.

Did resolve lot of issues w.r.t Compiler dependencies. Typecast,,, assembly and c mixing. putting macros in files etc..

LDT files in the place of LCF files .

Now Umon boots up and I am able to see the 'UMON>' prompt now and able to do some basic commands.

But, still the TFS is showing some problem.

Thanks and Warm Regards, Karthik Balaguru