stm32h7 非对齐访问出现HardFault

发布于 2021-12-16 15:44:42 浏览：1852 订阅该版

2 个回答

aozima 2021-12-16

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

enzo26 2021-12-16

这家伙很懒，什么也没写！

谢谢回复，
这个是art-pi 目前配置
```c
    /* Configure the MPU attributes as WT for SDRAM */
    MPU_InitStruct.Enable            = MPU_REGION_ENABLE;
    MPU_InitStruct.BaseAddress       = 0xC0000000;
    MPU_InitStruct.Size              = MPU_REGION_SIZE_32MB;
    MPU_InitStruct.AccessPermission  = MPU_REGION_FULL_ACCESS;
    MPU_InitStruct.IsBufferable      = MPU_ACCESS_NOT_BUFFERABLE;
    MPU_InitStruct.IsCacheable       = MPU_ACCESS_CACHEABLE;
    MPU_InitStruct.IsShareable       = MPU_ACCESS_NOT_SHAREABLE;
    MPU_InitStruct.Number            = MPU_REGION_NUMBER1;
    MPU_InitStruct.TypeExtField      = MPU_TEX_LEVEL0;
    MPU_InitStruct.SubRegionDisable  = 0x00;
    MPU_InitStruct.DisableExec       = MPU_INSTRUCTION_ACCESS_ENABLE;
```
我要按这个配置吗,下面这个配置是关闭cache功能了吗？我想要cache提速呀
```c
  /* Configure the MPU attributes for SDRAM */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0xC0000000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_4MB;
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
  MPU_InitStruct.SubRegionDisable = 0x00;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
```