Jumping to a function pointer

John Osen

I am working with an LM4F232 using CCS 5.1. I have a custom bootloader in the first 12KB of memory and use it to load an application into FLASH starting at 0x3000. I am now trying to figure out how to jump to the application and start running. I have the application loading and running in CSS at 0x3000.

The code I am trying to use is:

        void (*funcptr)( void );  // Set up function pointer to application
        funcptr = (void (*)())0x3000;
        funcptr();

Is this how to jump to a second application flashed into memory?

Or is jumping to memory not known to the debugger not possible?

over 13 years ago

0 George Mock over 13 years ago

TI__Guru**** 251290 points

System start up issues like this are usually discussed in the forum for the processor, in your case the Stellaris forum.

Presuming you really do need to branch to a hard-coded address ... It seems like this method would work. What happens?

Thanks and regards,

-George

0 John Osen over 13 years ago in reply to George Mock

Genius 3585 points

I jump into the weeds. I have a suspicion I need to load the PC with the contents of 0x3000 and not 0x3000. I will mark this thread answered and duplicate in the Stellaris forum. Probably need to read the manual ;)

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Jumping to a function pointer