STM32F746 LWIP无法PING通

ajianyes

最近用STM32F746做LWIP功能测试，用的是TCP_ECH功能，测试了官方的例程还有自己生成的CUBE工程均PING失败了。

调试的时候函数内PHYLinkState = LAN8742_GetLinkState(&LAN8742);变量PHYLinkState 的值一直是0x0002，代表100Mbit速度通讯的，状态一直都是对的。
望各位提供下思路，应该是哪里的问题


void ethernet_link_check_state(struct netif *netif)
{
  ETH_MACConfigTypeDef MACConf = {0};
  int32_t PHYLinkState = 0;
  uint32_t linkchanged = 0U, speed = 0U, duplex =0U;

  PHYLinkState = LAN8742_GetLinkState(&LAN8742);

  if(netif_is_link_up(netif) && (PHYLinkState <= LAN8742_STATUS_LINK_DOWN))       
  {
    HAL_ETH_Stop(&EthHandle);
    netif_set_down(netif);
    netif_set_link_down(netif);
  }
  else if(!netif_is_link_up(netif) && (PHYLinkState > LAN8742_STATUS_LINK_DOWN))
  {
    switch (PHYLinkState)
    {
    case LAN8742_STATUS_100MBITS_FULLDUPLEX:
      duplex = ETH_FULLDUPLEX_MODE;
      speed = ETH_SPEED_100M;
      linkchanged = 1;
      break;
    case LAN8742_STATUS_100MBITS_HALFDUPLEX:
      duplex = ETH_HALFDUPLEX_MODE;
      speed = ETH_SPEED_100M;
      linkchanged = 1;
      break;
    case LAN8742_STATUS_10MBITS_FULLDUPLEX:
      duplex = ETH_FULLDUPLEX_MODE;
      speed = ETH_SPEED_10M;
      linkchanged = 1;
      break;
    case LAN8742_STATUS_10MBITS_HALFDUPLEX:
      duplex = ETH_HALFDUPLEX_MODE;
      speed = ETH_SPEED_10M;
      linkchanged = 1;
      break;
    default:
      break;
    }

    if(linkchanged)
    {
      /* Get MAC Config MAC */
      HAL_ETH_GetMACConfig(&EthHandle, &MACConf);
      MACConf.DuplexMode = duplex;
      MACConf.Speed = speed;
      HAL_ETH_SetMACConfig(&EthHandle, &MACConf);
      HAL_ETH_Start(&EthHandle);
      netif_set_up(netif);
      netif_set_link_up(netif);
    }
  }
}


MPU的配置如下，参考的官网的例程进行配置的

static void MPU_Config(void)
{
  MPU_Region_InitTypeDef MPU_InitStruct;
  
  /* Disable the MPU */
  HAL_MPU_Disable();
  
  /* Configure the MPU as Strongly ordered for not defined regions */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x00;
  MPU_InitStruct.Size = MPU_REGION_SIZE_4GB;
  MPU_InitStruct.AccessPermission = MPU_REGION_NO_ACCESS;
  MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;
  MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER0;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x87;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
  HAL_MPU_ConfigRegion(&MPU_InitStruct);
  
  /* Configure the MPU as Normal Non Cacheable for Ethernet Buffers in the SRAM2 */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x20048000;
  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_NOT_CACHEABLE;
  MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER1;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;
  MPU_InitStruct.SubRegionDisable = 0x00;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;
  HAL_MPU_ConfigRegion(&MPU_InitStruct);
  
  /* Configure the MPU as Device for Ethernet Descriptors in the SRAM2 */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0x2004C000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_1KB;
  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_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER2;
  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 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_NUMBER3;
  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 FMC control registers */
  MPU_InitStruct.Enable = MPU_REGION_ENABLE;
  MPU_InitStruct.BaseAddress = 0xA0000000;
  MPU_InitStruct.Size = MPU_REGION_SIZE_8KB;
  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_SHAREABLE;
  MPU_InitStruct.Number = MPU_REGION_NUMBER4;
  MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;
  MPU_InitStruct.SubRegionDisable = 0x0;
  MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_DISABLE;
  HAL_MPU_ConfigRegion(&MPU_InitStruct);

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

eric2013

仅看楼主发的代码，看不出什么问题。

ajianyes

eric2013 发表于 2024-3-14 00:25
仅看楼主发的代码，看不出什么问题。

我把我的源代码上传上来吧，感谢硬汉哥的回复。非常感谢