NUCLEO-H743ZI cubemx生成lwip以太网工程ping不通

byronsong 提问时间：2019-4-16 17:23 /

本帖最后由 songshiqun2010 于 2019-4-23 13:32 编辑

同样的配置在STM32F4上用DP83848则没问题。。。

1.修改链接配置文件
/* Highest address of the user mode stack */
_estack = 0x24080000; /* end of RAM */
/* Generate a link error if heap and stack don't fit into RAM */
_Min_Heap_Size = 0x800;    /* required amount of heap  */
_Min_Stack_Size = 0x400; /* required amount of stack */

/* Initialized data sections goes into RAM, load LMA copy after code */
  .data :
  {
. = ALIGN(4);
_sdata = .;       /* create a global symbol at data start */
*(.data)          /* .data sections */
*(.data*)       /* .data* sections */

. = ALIGN(4);
_edata = .;       /* define a global symbol at data end */
  } >RAM_D1 AT> FLASH

  /* Uninitialized data section */
  . = ALIGN(4);
  .bss :
  {
/* This is used by the startup in order to initialize the .bss secion */
_sbss = .;       /* define a global symbol at bss start */
__bss_start__ = _sbss;
*(.bss)
*(.bss*)
*(COMMON)

. = ALIGN(4);
_ebss = .;       /* define a global symbol at bss end */
__bss_end__ = _ebss;
  } >RAM_D1

  /* User_heap_stack section, used to check that there is enough RAM left */
  ._user_heap_stack :
  {
. = ALIGN(4);
PROVIDE ( end = . );
PROVIDE ( _end = . );
. = . + _Min_Heap_Size;
. = . + _Min_Stack_Size;
. = ALIGN(4);
  } >RAM_D1

  .lwip_sec (NOLOAD) : {
. = ABSOLUTE(0x30040000);
*(.RxDecripSection)

. = ABSOLUTE(0x30040060);
*(.TxDecripSection)

. = ABSOLUTE(0x30040200);
*(.RxArraySection)
  } >RAM_D2 AT> FLASH

2.配置mpu
static void MPU_Config(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;

  /* Disable the MPU */
  HAL_MPU_Disable();

  /* Configure the MPU attributes as Device not cacheable
   for ETH DMA descriptors */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x30040000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_256B;
  MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_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_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x00;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Configure the MPU attributes as Cacheable write through
   for LwIP RAM heap which contains the Tx buffers */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x30044000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;
  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;

  HAL_MPU_ConfigRegion(&MPU_InitStruct);

  /* Enable the MPU */
  HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);
}

int main(void)
{
  /* USER CODE BEGIN 1 */
      MPU_Config();
  /* USER CODE END 1 */

  ......

/* Infinite loop */
  /* USER CODE BEGIN WHILE */
  while (1)
  {
/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */
   MX_LWIP_Process();
  }
  /* USER CODE END 3 */
}

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