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.

[SofLit]

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

[SofLit]

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);

}

[amirshn]

Hi,

tried that, no difference, it stuck in the activation function of data cache.

Would you explain me what are suspicious about?

Thanks a lot for you help

[SofLit]

I don't see an issue for the moment and I don't have that device for the moment to test.. I'll get back to you when I test it.

[amirshn]

Thanks a lot for that.

BTW, is it necessary to enable Dcache to activate ethernet for this MCU?

[SofLit]

The cache is enabled to enhance the performance of all the application, not only for ethernet.