LPC54102 secondary bootloader jump

svensavic — Sat, 18 Apr 2020 19:44:57 GMT

I have problem trying to start the application that is loaded with the secondary bootloader at the location 0x8000.

I did a flash memory dump, and the location 0x8000 and further matches the binary file of the application I am loading. So problem is either in the setup of the application project or the bootloader sequence for the program jump.

In the application project settings I have set Flash start as 0x8000 and flash size which corresponds to the mcu size - 32kb.

In the bootloader I run following commands to make the jump:

   static void boot_jump (uint32_t address) 
   {     
   asm(" LDR SP, [R0]");   //load new stack pointer address     
   asm(" LDR PC, [R0, #4]");//load new program counter address 
   } 

   void bootSystem (void) 
   {     
   SCB->VTOR = USER_FLASH_START & 0x1FFFFF80;     
   boot_jump(USER_FLASH_START); 
   }

All interrupts are disabled before calling bootSystem function.

Debugging the bootloader application I just repeatedly end up in the main function. (0x0000)

Any idea ?

Re: LPC54102 secondary bootloader jump

svensavic — Sat, 18 Apr 2020 22:21:20 GMT

Actually, there was nothing wrong with the code for reset of the mcu. Issue was with the .hex parser and pushing application to the flash rom. I had 1 byte misaligned when hex line was not in size of 16 bytes...

LPC MicrocontrollersのトピックLPC54102 secondary bootloader jump

LPC54102 secondary bootloader jump

Re: LPC54102 secondary bootloader jump