stm32h743 双bank切换不能使用AXI SRAM内存（想做双bank升级）

casy99

参考官方的历程，可以切换，但是不能勾选 0x2400000 内存，勾选上就切换失败！

casy99

[C] 纯文本查看 复制代码

	FLASH_OBProgramInitTypeDef OBInit;

	/* Unlock the User Flash area */
	HAL_FLASH_Unlock();

	HAL_FLASH_OB_Unlock();

	/* Get the Dual boot configuration status */
	HAL_FLASHEx_OBGetConfig(&OBInit);

	/* Get FLASH_WRP_SECTORS write protection status */
	OBInit.Banks 	= FLASH_BANK_1;
	HAL_FLASHEx_OBGetConfig(&OBInit);

	if(strchr(pra1,'2'))
	{
		 /*Swap to bank2 */
		 /*Set OB SWAP_BANK_OPT to swap Bank2*/
		 OBInit.OptionType = OPTIONBYTE_USER;
		 OBInit.USERType   = OB_USER_SWAP_BANK;
		 OBInit.USERConfig = OB_SWAP_BANK_ENABLE;
		 HAL_FLASHEx_OBProgram(&OBInit);	 	
	}

	if(strchr(pra1,'1'))
	{
		/* Swap to bank1 */
		/*Set OB SWAP_BANK_OPT to swap Bank1*/
		OBInit.OptionType = OPTIONBYTE_USER;
		OBInit.USERType = OB_USER_SWAP_BANK;
		OBInit.USERConfig = OB_SWAP_BANK_DISABLE;
		HAL_FLASHEx_OBProgram(&OBInit);
	}
	
	/* Launch Option bytes loading */
	HAL_FLASH_OB_Launch();

	/*
		as the CPU is executing from the Flash Bank1, and the I-Cache is enabled :
		Instruction cache must be invalidated after bank switching to ensure that
		CPU will fetch correct instructions from the flash.
	*/
	SCB_InvalidateICache();
	

casy99

代码来自官方历程，官方历程没有勾选这片内存，但是也没说原因

eric2013

帮顶，没测试过这个，后面有机会了试试。