STM32H733 data cache initialization issue

[amirshn]

Hello,

I am using a STM32H733VGT on a custom design board. On a fresh project in CubeMX, I tried to activate data cache but the autogenerated code crashes at  SCB_EnableDCache(); . (nothing has been activated on the CubeMX, just the external crystal and debugging port)

i tried enabling or disabling MPU as well, same results.

I need data cache for activating ethernet.

 

Any help would be highly appreciated.

[mƎALLEm]

Hello,

Are you sure you've generated a project for STM32H733 and not another MCU device?

Is that possible to share your ioc file?

[amirshn]

Hi 
I think so , here is my ioc file:

Thanks

[mƎALLEm]

Could you please replace the MPU config like the following?:

void MPU_Config(void)
{
 MPU_Region_InitTypeDef MPU_InitStruct = {0};

 /* Disables the MPU */
 HAL_MPU_Disable();

 /** Initializes and configures the Region and the memory to be protected
 */
 MPU_InitStruct.Enable = MPU_REGION_ENABLE;
 MPU_InitStruct.Number = MPU_REGION_NUMBER0;
 MPU_InitStruct.BaseAddress = 0x0;
 MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
 MPU_InitStruct.SubRegionDisable = 0x87;
 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
 MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
 MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
 MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
 MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
 MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;

 HAL_MPU_ConfigRegion(&MPU_InitStruct);
 /* Enables the MPU */
 HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);

}

 

[mƎALLEm]

Hello,

I didn't find that exact device STM32H733VGT but tested your ioc file on NUCLEO-H723ZI board (STM32H723ZI) and I didn't reproduce the behavior.

Don't step into SCB_EnableICache() and SCB_EnableDCache().

If you put a break point on HAL_Init() and run, do you reach it? 

[amirshn]

Hi,

yeah, that's the case, unexpectedly if I put a breakpoint after these two (SCB_EnableICache() and SCB_EnableDCache()) , I'll reach HAL_Init(). (I just figured this out).

Could you tell me why is it behaving like this?

 

Thanks a lot for your help.