LPC845 bootloader jump issue

jtro — Fri, 16 Aug 2019 14:41:14 GMT

In my custom bootloader I'm not able to jump to application.

memory mapping:

0x0 to 0x8fff - bootloader

0x9000 - 0x9ffff - firmware

bootloader Code:

void boot_jump(uint32_t address)

{

// below assembly code gives error in mcuxpresso

//   __asm(
//           LDR SP, [R0]       //;Load new stack pointer address
//           LDR PC, [R0, #4]   //;Load new program counter address
//          );

//alternate function for jump

asm("bx %r0");

}

void main()

{

            for(uint8_t irqn=0; irqn < 32; irqn++)
           {
               NVIC_DisableIRQ(irqn);
               NVIC_ClearPendingIRQ(irqn);
           }

SCB->VTOR = 0x9000 & 0x1FFFFF80;

boot_jump(0x9000 );

}

Re: LPC845 bootloader jump issue

soledad — Fri, 16 Aug 2019 17:14:02 GMT

Hi,

Please check the following thread and let me know if this helps,

https://community.nxp.com/thread/494497

Have a nice day!

Regards

Sol

LPC Microcontrollers中的主题 LPC845 bootloader jump issue

LPC845 bootloader jump issue

Re: LPC845 bootloader jump issue