BootLoader：

main里调用函数跳转到APP地址0x8003000

1. typedef  void (*pFunction)(void);

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1. #define ApplicationAddress    0x8003000

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1. void UserAppStart(void)
   
2. {
   
3.           if (((*(__IO uint32_t*)ApplicationAddress) & 0x2FFE0000 ) == 0x20000000)
   
4.     {
   
5.       /* Jump to user application */
   
6.       JumpAddress = *(__IO uint32_t*) (ApplicationAddress + 4);
   
7.       Jump_To_Application = (pFunction) JumpAddress;
   
8.       /* Initialize user application's Stack Pointer */
   
9.       __set_MSP(*(__IO uint32_t*) ApplicationAddress);
   
10.       Jump_To_Application();
    
11.     }
    
12. }

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APP：

main 函数添加

1. #define APPLICATION_ADDRESS     ((uint32_t)0x08003000)
   
2. #if   (defined ( __CC_ARM ))
   
3.   __IO uint32_t VectorTable[48] __attribute__((at(0x20000000)));
   
4. #elif (defined (__ICCARM__))
   
5. #pragma location = 0x20000000
   
6.   __no_init __IO uint32_t VectorTable[48];
   
7. #elif defined   (  __GNUC__  )
   
8.   __IO uint32_t VectorTable[48] __attribute__((section(".RAMVectorTable")));
   
9. #elif defined ( __TASKING__ )
   
10.   __IO uint32_t VectorTable[48] __at(0x20000000);
    
11. #endif

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1.   /* USER CODE BEGIN 1 */
   
2.         uint32_t i = 0;

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1.   /* Relocate by software the vector table to the internal SRAM at 0x20000000 ***/  
   
2.         
   
3.   /* Copy the vector table from the Flash (mapped at the base of the application
   
4.      load address 0x08003000) to the base address of the SRAM at 0x20000000. */
   
5. 
   
6.   for(i = 0; i < 48; i++)
   
7.   {
   
8.     VectorTable<i> = *(__IO uint32_t*)(APPLICATION_ADDRESS + (i<<2));</i>
   
9.   }
   
10.         // Enable the SYSCFG peripheral clock
    
11.   __HAL_RCC_SYSCFG_CLK_ENABLE();
    
12.   // Remap SRAM at 0x00000000

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1.   __HAL_SYSCFG_REMAPMEMORY_SRAM();

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在Keil下设置IROM1：start 0x8003000 IRAM1：Start 0x200000C0

stm32f0 没有中断偏移寄存器，所以将中断向量表读取到RAM中，然后重映射到RAM地址.