代码收藏家技术教程 2024-12-09

STM32H723ZGT6移植LWIP协议栈

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;
 }