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Branch to application from bootloader

Tomas K

Hi, I am using this function to branch to application wo problems on GNU tools:

static void boot_jump(uint32_t lAddress) {
  __asm(
      "LDR SP, [R0]\n"
      "LDR PC, [R0, #4]\n"
  );
}

But compiling in MDK-ARM reports:
bootloader.c(45): error: #20: identifier "SP" is undefined

How to solve this or what method must be used in MDK-ARM to do the same?
I could not find any bootloader example in the Keil pack that comes for STM32F micro.

Parents
  • 0 in reply to Tomas K

    Sorry correct code is:

    static void boot_jump(uint32_t address) {
  typedef  void (*pFunction)(void);
  pFunction jumpToApplication = (pFunction) *(__IO uint32_t*)(address + 4);
  /* Initialize user application's Stack Pointer */
  __set_MSP(*(__IO uint32_t*) address);
  jumpToApplication();
}

Reply
  • 0 in reply to Tomas K

    Sorry correct code is:

    static void boot_jump(uint32_t address) {
  typedef  void (*pFunction)(void);
  pFunction jumpToApplication = (pFunction) *(__IO uint32_t*)(address + 4);
  /* Initialize user application's Stack Pointer */
  __set_MSP(*(__IO uint32_t*) address);
  jumpToApplication();
}

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