Bootloader Problem

[andrewkelly9]

Posted on February 12, 2010 at 17:23

Bootloader Problem

#bootloader

[Tesla DeLorean]

Posted on May 17, 2011 at 13:40

Wouldn't this make more sense?

-Clive void app_start(void) {     u32 *resetvector = (u32 *)(0x08004004); // 32-bit point     void (*runapp)();     printf(''The code start is %08X\n'',*resetvector);     irq_disable();     runapp=(void(*)())(*resetvector);     runapp(); }

[andrewkelly9]

Posted on May 17, 2011 at 13:40

The sample code looks like this:

JumpAddress = *(__IO uint32_t*) (ApplicationAddress + 4); Jump_To_Application = (pFunction) JumpAddress; __set_MSP(*(__IO uint32_t*) ApplicationAddress); Jump_To_Application(); I am not doing this, Very possibly the problem. The only issue will be translating the routine to set_MSP GCC  assembly. Any help would be appliciated __ASM void __set_MSP(UINT32 mainStackPointer) {   msr msp, r0   bx lr }

[andrewkelly9]

Posted on May 17, 2011 at 13:40

No Need, its in the header. Will let you know if this works...

void __set_MSP(UINT32 topOfMainStack) {   __ASM volatile (''MSR msp, %0\n\t''                   ''BX  lr     \n\t'' : : ''r'' (topOfMainStack) ); }

[andrewkelly9]

Posted on May 17, 2011 at 13:40

Its working.

Using the code above. I suspect that it got an exception when I didn't change the stack before jumping. # So many thanks, sorry i can't get you a pint and for anyone else, the solution is in AN2557 sample code.