H7B0串口1DMA方式求助？？？DMA中断收不到数据？？？？？？

只看该作者 · 2023-3-10 14:06

H7B0串口1DMA方式求助？？？DMA中断收不到数据？？？？？？

      MPU_InitStruct.Enable          = MPU_REGION_ENABLE;
      MPU_InitStruct.BaseAddress    = 0x24000000;
      MPU_InitStruct.Size          = MPU_REGION_SIZE_512KB;
      MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
//       MPU_InitStruct.IsBufferable    = MPU_ACCESS_NOT_BUFFERABLE;
      MPU_InitStruct.IsBufferable    = MPU_ACCESS_BUFFERABLE;
      MPU_InitStruct.IsCacheable    = MPU_ACCESS_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_ENABLE;


  /* Enable I-Cache */
  SCB_EnableICache();
  /* Enable D-Cache */
  SCB_EnableDCache();

ALIGN_32BYTES(__attribute__((section (".RAM_D2"))) uint8_t USART1_RX_BUF[USART1_DMA_RX_BUFFER_MAXIMUM]) = "ARM";