; *************************************************************
; *** Scatter-Loading Description File generated by uVision ***
; *************************************************************

LR_IROM1 0x08010000 0x00070000  {    ; load region size_region
  ER_IROM1 0x08010000 0x00070000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
   .ANY (+XO)
  }
  RW_IRAM1 0x20000000 0x00010000  {  ; RW data
   .ANY (+RW +ZI)
  }
}

; *************************************************************
; *** Scatter-Loading Description File generated by uVision ***
; *************************************************************

LR_IROM1 0x20001000 0x0000C000  {    ; load region size_region
  ER_IROM1 0x20001000 0x0000C000  {  ; load address = execution address
   *.o (RESET, +First)
   *(InRoot$$Sections)
   .ANY (+RO)
   .ANY (+XO)
  }
  RW_IRAM1 0x2000D000 0x00003000  {  ; RW data
   .ANY (+RW +ZI)
  }
}

/**
  * @brief  Setup the microcontroller system
  *         Initialize the Embedded Flash Interface, the PLL and update the 
  *         SystemCoreClock variable.
  * @note   This function should be used only after reset.
  * @param  None
  * @retval None
  */
void SystemInit (void)
{
	// ... ...
#ifdef VECT_TAB_SRAM
  SCB->VTOR = SRAM_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal SRAM. */
#else
  SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET; /* Vector Table Relocation in Internal FLASH. */
#endif 
}

SCB->VTOR = FLASH_BASE | VECT_TAB_OFFSET;

SCB->VTOR = FLASH_BASE | 0x10000;

SCB->VTOR = SRAM_BASE | 0x1000;

fromelf [options] input_file

C:\LenovoSoft\Keil_v5\ARM\ARMCC\bin\fromelf.exe --bin -o  ..\OBJ\TOUCH.bin ..\OBJ\TOUCH.axf

typedef  void (*pIAPFunc)(void);				//定义一个函数类型的参数.
pIAPFunc jump2app;  // 定义一个函数指针变量

/**
  * @brief  设置栈顶指针的地址
  * @note   
  * @param  addr 栈顶指针的地址
  * @retval 
  */
__asm void MSR_MSP(u32 addr)
{
    MSR MSP, r0 // set Main Stack value
    BX r14
}

/**
  \brief   Set Main Stack Pointer
  \details Assigns the given value to the Main Stack Pointer (MSP).
  \param [in]    topOfMainStack  Main Stack Pointer value to set
 */
__STATIC_INLINE void __set_MSP(uint32_t topOfMainStack)
{
  register uint32_t __regMainStackPointer     __ASM("msp");
  __regMainStackPointer = topOfMainStack;
}

/**
  * @brief  跳转到应用程序段
  * @note   
  * @param  appxaddr 用户代码起始地址
  * @retval 
  */
void iap_load_app(uint32_t appxaddr)
{
    if (((*(__IO uint32_t *)appxaddr) & 0x2FFE0000) == 0x20000000) // 检查栈顶地址是否合法.
    {
        jump2app = (pIAPFunc) * (__IO uint32_t *)(appxaddr + 4);   // 用户代码区第二个字为程序开始地址(复位地址)
        __set_MSP(*(__IO uint32_t *)appxaddr);                     // 初始化APP堆栈指针(用户代码区的第一个字用于存放栈顶地址)
        jump2app();                                                // 跳转到APP.
    }
}

//注意,读取USARTx->SR能避免莫名其妙的错误
#define USART_REC_LEN 55*1024 //定义最大接收字节数 55K
uint8_t USART_RX_BUF[USART_REC_LEN] __attribute__ ((at(0X20001000))); //接收缓冲,最大USART_REC_LEN个字节,起始地址为0X20001000.

uint16_t USART_RX_CNT=0; // 接收的字节数

// 串口1中断服务程序
void USART1_IRQHandler(void)
{
	uint8_t res;	
	if(USART1->SR & (1<<5))//接收到数据
	{	 
		res = USART1->DR; 
		if(USART_RX_CNT < USART_REC_LEN)
		{
			USART_RX_BUF[USART_RX_CNT] = res;
			USART_RX_CNT++;			 									     
		}
	}
}

uint16_t iapbuf[1024];

/**
  * @brief  将接收的bin文件写入指定的地址
  * @note   
  * @param  appxaddr 应用程序的起始地址
  * @param  appbuf 应用程序CODE.
  * @param  appsize 应用程序大小(字节).
  * @retval 
  */
void iap_write_appbin(uint32_t appxaddr, uint8_t *appbuf, uint32_t appsize)
{
    uint16_t t;
    uint16_t i = 0;
    uint16_t temp;
    uint32_t fwaddr = appxaddr; // 当前写入的地址
    uint8_t *dfu = appbuf;
    for (t = 0; t < appsize; t += 2)
    {
        temp = (uint16_t)dfu[1] << 8;
        temp += (uint16_t)dfu[0];
        dfu += 2; // 偏移2个字节
        iapbuf[i++] = temp;
        if (i == 1024)
        {
            i = 0;
            internalFLASH_Write(fwaddr, iapbuf, 1024); 
            fwaddr += 2048; // 偏移2048  16=2*8.所以要乘以2.
        }
    }
    if (i)
    {
        internalFLASH_Write(fwaddr, iapbuf, i); // 将最后的一些内容字节写进去.
    }
}

//执行FLASH APP
if(((*(__IO uint32_t *)(0x08010000 + 4)) & 0xFF000000)==0x08000000)//判断是否为0X08XXXXXX.
{	 
    iap_load_app(0x08010000);// 执行FLASH APP代码
}

// 执行SRAM APP
if(((*(__IO uint32 *)(0X20001000 + 4)) & 0xFF000000)==0x20000000)//判断是否为0X20XXXXXX.
{	 
    iap_load_app(0X20001000);// SRAM地址
}