飞思卡尔MK21 IAP固件更新

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引导程序bootLoad

定义跳转地址

#ifndef RELOCATED_VECTORS
    #define RELOCATED_VECTORS  0x00016000
#endif

擦除扇区

NbrOfPage = FLASH_PagesMask(size);//返回需要擦除的扇区页数
                                    
/* Erase the FLASH pages */
for (EraseCounter = 0; (EraseCounter < NbrOfPage) && (result == FTFx_OK); EraseCounter++)
{
    result = FlashEraseSector(&flashSSDConfig,FlashDestination +  (PageSize *EraseCounter),\FTFx_PSECTOR_SIZE,g_FlashLaunchCommand);
    if (result != FTFx_OK)
    {
        
        Send_Byte(CA);
        Send_Byte(CA);
        return -2;
    }
    break;
    OSA_TimeDelay(1);
}

写入数据到flash并校验

for (j = 0;(j < packet_length) && (FlashDestination <  ApplicationAddress + size);j += 4)
{
    FlashProgram(&flashSSDConfig, FlashDestination,4, \
    (uint8_t*)RamSource, g_FlashLaunchCommand);
    if (FTFx_OK !=FlashProgramCheck(&flashSSDConfig,FlashDestination,4,
                                                            (uint8_t*)RamSource,&failAddr,
                                                          1,g_FlashLaunchCommand ))
{
        Send_Byte(0x01);
        Send_Byte(CA);
        Send_Byte(CA);
        return -2;
}
                                        
FlashDestination += 4;
RamSource += 4;
}

程序跳转

extern void JumpToUserApplication(unsigned long userSP, unsigned long userStartup);

EXPORT JumpToUserApplication
    
JumpToUserApplication
    msr msp, r0
    msr psp, r0        
    mov pc, r1
END

main方法内主要代码

while(true)
{
    //复位后检测用户自定义boot是否被按下，按下则进行IAP
    if (GPIO_DRV_ReadPinInput(bootPin) == 0)
    {
        SerialDownload();
    }
     // relocate vector table
    SerialPutString("SCB_VTOR = RELOCATED_VECTORS\r\n\r\n");
    SysTick ->CTRL = 0;
    SCB->VTOR =  RELOCATED_VECTORS; 
    printf("RELOCATED_VECTORS:%8x",RELOCATED_VECTORS);
    SerialPutString("JumpToUserApplication\r\n");
    JumpToUserApplication(*((unsigned long*)RELOCATED_VECTORS), *((unsigned long*)(RELOCATED_VECTORS+4)));
}

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用户应用程序

修改地址映射表

• 修改MK21DN512Axxx5_flash.scf

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#if (defined(__ram_vector_table__))
  #define __ram_vector_table_size__    0x00000400
#else
  #define __ram_vector_table_size__    0x00000000
#endif

#define m_interrupts_start             0x00016000//中断地址偏移量
#define m_interrupts_size              0x00000400

#define m_flash_config_start           0x00016400
#define m_flash_config_size            0x00000010

#define m_text_start                   0x00016410
#define m_text_size                    0x0007FBF0

#define m_interrupts_ram_start         0x1FFF8000
#define m_interrupts_ram_size          __ram_vector_table_size__

设置程序起始地址

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用户代码设置中断向量地址

SCB->VTOR =  0x16000;//设置中断向量表起始地址
hardware_init();
OSA_Init();
driverInterfaceInit();
printerPinConfig();

生成bin文件

• 勾选生成hex文件选项，并编译
• 将生成的hex使用hex转bin工具转换成bin文件