STM32H723ZGT6移植LWIP协议栈

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@小白创作中心

STM32H723ZGT6移植LWIP协议栈

引用

CSDN

https://m.blog.csdn.net/weixin_42554470/article/details/141088133

本文详细记录了在STM32H723芯片上移植LWIP协议栈的具体步骤，包括RMII引脚配置、数据缓存使能、LWIP配置、MPU配置、D2区域时钟使能、PHY芯片复位、PHY芯片地址修改等，并提供了相应的代码示例。

前言

本次使用最新的STM32H723芯片，在这块板子上移植LWIP协议栈，记录相关的操作步骤，以便后续进行学习和方便查看。

一、操作步骤

1.根据我们的底板原理图配置相关的RMII引脚

我们使用STM32CUBEIDE来进行配置相关的引脚。

2.使能数据缓存和指令缓存

3.打开LWIP的配置

然后配置地址

PHY芯片选择，这里只有一个选项，我们可以配置成默认的即可，然后在后面生成的代码中去修改一些参数即可。

同时需要配置MPU

配置完成之后在STM32H723ZGTX_FLASH.ld文件中添加这几行语句


.lwip_sec (NOLOAD):  
  {  
    . = ABSOLUTE(0X30000000);  
    *(.RxDecripSection)  
    . = ABSOLUTE(0X30000200);  
    *(.TxDecripSection)  
    . = ABSOLUTE(0X30004000);  
    *(.Rx_PoolSection)  
   } >RAM_D2

4.然后使能D2区域的时钟


int main(void)  
{  
  /* USER CODE BEGIN 1 */  
  /* USER CODE END 1 */  
  /* MPU Configuration--------------------------------------------------------*/  
  MPU_Config();  
  /* Enable I-Cache---------------------------------------------------------*/  
  SCB_EnableICache();  
  /* Enable D-Cache---------------------------------------------------------*/  
  SCB_EnableDCache();  
  /* MCU Configuration--------------------------------------------------------*/  
  /* Reset of all peripherals, Initializes the Flash interface and the Systick. */  
  HAL_Init();  
  /* USER CODE BEGIN Init */  
  /* USER CODE END Init */  
  /* Configure the system clock */  
  SystemClock_Config();  
  /* USER CODE BEGIN SysInit */  
  __HAL_RCC_D2SRAM1_CLK_ENABLE();  
  /* USER CODE END SysInit */  
  /* Initialize all configured peripherals */  
  MX_GPIO_Init();  
  MX_LWIP_Init();  
  /* USER CODE BEGIN 2 */  
  /* USER CODE END 2 */  
  /* Infinite loop */  
  /* USER CODE BEGIN WHILE */  
  while (1)  
  {  
    /* USER CODE END WHILE */  
    /* USER CODE BEGIN 3 */	  
      MX_LWIP_Process();	  
      
      HAL_GPIO_TogglePin(GPIOC, GPIO_PIN_0);	  
      
      HAL_Delay(500);  
  }  
  /* USER CODE END 3 */  
}

5.将PHY芯片进行复位


void MX_LWIP_Init(void)  
{  
  /* IP addresses initialization */  
  IP_ADDRESS[0] = 192;  
  IP_ADDRESS[1] = 168;  
  IP_ADDRESS[2] = 13;  
  IP_ADDRESS[3] = 15;  
  NETMASK_ADDRESS[0] = 255;  
  NETMASK_ADDRESS[1] = 255;  
  NETMASK_ADDRESS[2] = 255;  
  NETMASK_ADDRESS[3] = 0;  
  GATEWAY_ADDRESS[0] = 192;  
  GATEWAY_ADDRESS[1] = 168;  
  GATEWAY_ADDRESS[2] = 13;  
  GATEWAY_ADDRESS[3] = 1;  
/* USER CODE BEGIN IP_ADDRESSES */  
    HAL_GPIO_WritePin(GPIOF,11,GPIO_PIN_RESET);  
      HAL_Delay(100);  
      HAL_GPIO_WritePin(GPIOF,11,GPIO_PIN_SET);  
      HAL_Delay(100);  
/* USER CODE END IP_ADDRESSES */  
  /* Initilialize the LwIP stack without RTOS */  
  lwip_init();  
  /* IP addresses initialization without DHCP (IPv4) */  
  IP4_ADDR(&ipaddr, IP_ADDRESS[0], IP_ADDRESS[1], IP_ADDRESS[2], IP_ADDRESS[3]);  
  IP4_ADDR(&netmask, NETMASK_ADDRESS[0], NETMASK_ADDRESS[1] , NETMASK_ADDRESS[2], NETMASK_ADDRESS[3]);  
  IP4_ADDR(&gw, GATEWAY_ADDRESS[0], GATEWAY_ADDRESS[1], GATEWAY_ADDRESS[2], GATEWAY_ADDRESS[3]);  
  /* add the network interface (IPv4/IPv6) without RTOS */  
  netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &ethernet_input);  
  /* Registers the default network interface */  
  netif_set_default(&gnetif);  
  if (netif_is_link_up(&gnetif))  
  {  
    /* When the netif is fully configured this function must be called */  
    netif_set_up(&gnetif);  
  }  
  else  
  {  
    /* When the netif link is down this function must be called */  
    netif_set_down(&gnetif);  
  }  
  /* Set the link callback function, this function is called on change of link status*/  
  netif_set_link_callback(&gnetif, ethernet_link_status_updated);  
  /* Create the Ethernet link handler thread */  
/* USER CODE BEGIN 3 */  
/* USER CODE END 3 */  
}

6.修改PHY芯片的地址

代码如下（示例）：


int32_t LAN8742_Init(lan8742_Object_t *pObj)  
 {  
   uint32_t regvalue = 0, addr = 0;  
   int32_t status = LAN8742_STATUS_OK;  
   if(pObj->Is_Initialized == 0)  
   {  
     if(pObj->IO.Init != 0)  
     {  
       /* GPIO and Clocks initialization */  
       pObj->IO.Init();  
     }  
     /* for later check */  
     pObj->DevAddr = LAN8742_MAX_DEV_ADDR + 1;  
     /* Get the device address from special mode register */  
     for(addr = 0; addr <= LAN8742_MAX_DEV_ADDR; addr ++)  
     {  
       if(pObj->IO.ReadReg(addr, LAN8742_SMR, &regvalue) < 0)  
       {  
         status = LAN8742_STATUS_READ_ERROR;  
         /* Can't read from this device address  
            continue with next address */  
         continue;  
       }  
       if((regvalue & LAN8742_SMR_PHY_ADDR) == addr)  
       {  
         pObj->DevAddr = addr;  
         status = LAN8742_STATUS_OK;  
         break;  
       }  
     }  
     if(pObj->DevAddr > LAN8742_MAX_DEV_ADDR)  
     {  
       status = LAN8742_STATUS_ADDRESS_ERROR;  
     }  
     /* if device address is matched */  
     if(status == LAN8742_STATUS_OK)  
     {  
       pObj->Is_Initialized = 1;  
     }  
   }  
   return status;  
 }