I'm using the STM32H7B3I-DK and having an issue I am not fully understanding. I am using the Scrolling Dynamic Graph and wanting to add some more peripherals such as SDMMC so I added a shareable region to the to my RAM.
However, now whenever the graph hits about 80 data values, the screen starts to flicker in some areas that are updating.
To be clear I do not have any SDMMC code in my project yet, I have only changed MPU settings to prepare for it.
Below is my relevant MPU code:
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER2;
MPU_InitStruct.BaseAddress = 0x24000000;
MPU_InitStruct.Size = MPU_REGION_SIZE_1MB;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
/** Initializes and configures the Region and the memory to be protected
*/
MPU_InitStruct.Number = MPU_REGION_NUMBER3;
MPU_InitStruct.Size = MPU_REGION_SIZE_256KB;
MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE; //commenting out this line fixes the issue but then causes SD functionality to fail
MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;
HAL_MPU_ConfigRegion(&MPU_InitStruct);
