SPOTA中二次引导的地址设置问题

你好，

在Secondary Bootloader 工程中，将image加载到SRAM时为何SUPPORT_AN_B_001不使能，如果使能就是从OTP中加载吗？

从spi flash中加载和使能SUPPORT_AN_B_001有何不同？

如果我想把image header 和 product header 的地址改变不使用0x7052 0x7051的话是否能实现？

/************** AN-B-001 based image /fast bootloader section **************/
// Define it if
// if AN-B-001 based image is burned in SPI flash and the bootloader is running from the OTP
#undef SUPPORT_AN_B_001 //Enable it for the secondary bootloader

//从spi flash 中加载函数如下：

int spi_loadActiveImage(void)
{
//Initiate the SPI interface
spi_flash_peripheral_init(); //spi GPIO接口引脚 初始化
spi_flash_release_from_power_down(); //required if the flash has been set to power down by the application

#ifdef SUPPORT_AN_B_001
uint8 AN001Header[AN001_SPI_HEADER_SIZE];
// check for AN-B-001 header
SpiFlashRead((unsigned long)&AN001Header, (unsigned long) 0, (unsigned long)AN001_SPI_HEADER_SIZE);
if (AN001Header[0]==0x70 && AN001Header[1]==0x50) { //it must be disabled if the bootloader runs from the SPI flash
SpiFlashRead(SYSRAM_BASE_ADDRESS, (unsigned long)AN001_SPI_STARTCODE_POSITION, (unsigned long) (AN001Header[6]<<8 | AN001Header[7]));
return 0;
}
else
{

#if defined(ALLOW_NO_HEADER)

// Load 0x7F00 bytes from memory offset 0.
SpiFlashRead(SYSRAM_BASE_ADDRESS, 0, 0x7F00);
return 0;

#endif // defined(ALLOW_NO_HEADER)
}

// No AN-B-001 valid image has been found in SPI flash. Return error.
return -1;
#else
spi_flash_size_init(); //读取设备id,配置spi flash 大小
返回loadActiveImage(); //加载img
#endif
}