本文使用了正点原子的阿波罗开发板，接下来我将粗略的对STM32F767通过STM32cubeMX进行以太网协议配置。

具体步骤

1.首先使能ETH，模式选择RMII；

2.使能LWIP和FREERTOS；

因为阿波罗的开发板PHY芯片的ETH_DXT1和ETH_DXT0用的是PG13，PG14引脚，和默认的不同，所以这里改一下

3.配置时钟，在这里我放上我自己的时钟配置图，只要不标红就行，我用的是25MHz外部晶振作时钟源 ；

4.配置ETH，由于阿波罗开发板的LAN8720芯片的PHYAD0引脚悬空，故PHY Address设置为0；

5.由于我用的STM32cubeMX的版本是将LAN8742A作为默认芯片，所以我们这里不做修改，只用将内部参数改为LAN8720参数即可；

6.配置LWIP，本人这里不使用DHCP获取IP地址等信息，并且我使用的是TCP，所以未对UDP使能，设置如图；

7.配置FREERTOS，我在这里加了两个线程备用

8.按下生成按钮，生成项目，生成时需要选择编译软件为自己用的软件，本人使用的是V5；

由于阿波罗开发板的PHY芯片的RESET引脚是依靠PCF8574的P7位控制，所以我们要在项目中引入PCF8574的代码，以下代码可以在阿波罗资料盘中找到

打开main.c里的加上#include “pcf8574.h”，并在初始化部分将PCF8574初始化

/* Includes ------------------------------------------------------------------*/

#include "main.h"

#include "stm32f7xx_hal.h"

#include "cmsis_os.h"

#include "lwip.h"

#include "gpio.h"

/* USER CODE BEGIN Includes */

#include "pcf8574.h"

/* USER CODE END Includes */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN PV */

/* Private variables ---------------------------------------------------------*/

/* USER CODE END PV */

/* Private function prototypes -----------------------------------------------*/

void SystemClock_Config(void);

void MX_FREERTOS_Init(void);

/* USER CODE BEGIN PFP */

/* Private function prototypes -----------------------------------------------*/

/* USER CODE END PFP */

/* USER CODE BEGIN 0 */

/* USER CODE END 0 */

/**

* @brief  The application entry point.

*

* @retval None

*/

int main(void)

{

/* USER CODE BEGIN 1 */

/* USER CODE END 1 */

/* 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 */

PCF8574_Init();

/* USER CODE END SysInit */

/* Initialize all configured peripherals */

MX_GPIO_Init();

/* USER CODE BEGIN 2 */

/* USER CODE END 2 */

/* Call init function for freertos objects (in freertos.c) */

MX_FREERTOS_Init();

/* Start scheduler */

osKernelStart();

/* We should never get here as control is now taken by the scheduler */

/* Infinite loop */

/* USER CODE BEGIN WHILE */

while (1)

{

/* USER CODE END WHILE */

/* USER CODE BEGIN 3 */

}

/* USER CODE END 3 */

}

打开freertos.c里的加上

#include “gpio.h”

#include “sys.h”

#include “pcf8574.h”

#include “tcp_echoserver.h”，并在主线程将PCF8574初的P7管脚使能

PCF8574_WriteBit(ETH_RESET_IO,0);代码如下

/* Includes ------------------------------------------------------------------*/

#include "FreeRTOS.h"

#include "task.h"

#include "main.h"

#include "cmsis_os.h"

/* Private includes ----------------------------------------------------------*/

/* USER CODE BEGIN Includes */

#include "gpio.h"

#include "sys.h"

#include "pcf8574.h"

#include "tcp_echoserver.h"

/* USER CODE END Includes */

/* Private typedef -----------------------------------------------------------*/

/* USER CODE BEGIN PTD */

/* USER CODE END PTD */

/* Private define ------------------------------------------------------------*/

/* USER CODE BEGIN PD */

/* USER CODE END PD */

/* Private macro -------------------------------------------------------------*/

/* USER CODE BEGIN PM */

/* USER CODE END PM */

/* Private variables ---------------------------------------------------------*/

/* USER CODE BEGIN Variables */

/* USER CODE END Variables */

osThreadId defaultTaskHandle;

osThreadId myTaskLEDHandle;

osThreadId myTaskTCPHandle;

/* Private function prototypes -----------------------------------------------*/

/* USER CODE BEGIN FunctionPrototypes */

extern void tcp_echoserver_init(void);

/* USER CODE END FunctionPrototypes */

void StartDefaultTask(void const * argument);

void LEDTask(void const * argument);

void TCPTask(void const * argument);

extern void MX_LWIP_Init(void);

void MX_FREERTOS_Init(void); /* (MISRA C 2004 rule 8.1) */

/**

* @brief  FreeRTOS initialization

* @param  None

* @retval None

*/

void MX_FREERTOS_Init(void) {

/* USER CODE BEGIN Init */

/* USER CODE END Init */

/* USER CODE BEGIN RTOS_MUTEX */

/* add mutexes, ... */

/* USER CODE END RTOS_MUTEX */

/* USER CODE BEGIN RTOS_SEMAPHORES */

/* add semaphores, ... */

/* USER CODE END RTOS_SEMAPHORES */

/* USER CODE BEGIN RTOS_TIMERS */

/* start timers, add new ones, ... */

/* USER CODE END RTOS_TIMERS */

/* Create the thread(s) */

/* definition and creation of defaultTask */

osThreadDef(defaultTask, StartDefaultTask, osPriorityNormal, 0, 128);

defaultTaskHandle = osThreadCreate(osThread(defaultTask), NULL);

/* definition and creation of myTaskLED */

osThreadDef(myTaskLED, LEDTask, osPriorityIdle, 0, 128);

myTaskLEDHandle = osThreadCreate(osThread(myTaskLED), NULL);

/* definition and creation of myTaskTCP */

osThreadDef(myTaskTCP, TCPTask, osPriorityIdle, 0, 1024);

myTaskTCPHandle = osThreadCreate(osThread(myTaskTCP), NULL);

/* USER CODE BEGIN RTOS_THREADS */

/* add threads, ... */

/* USER CODE END RTOS_THREADS */

/* USER CODE BEGIN RTOS_QUEUES */

/* add queues, ... */

/* USER CODE END RTOS_QUEUES */

}

/* USER CODE BEGIN Header_StartDefaultTask */

/**

* @brief  Function implementing the defaultTask thread.

* @param  argument: Not used

* @retval None

*/

/* USER CODE END Header_StartDefaultTask */

void StartDefaultTask(void const * argument)

{

/* init code for LWIP */

MX_LWIP_Init();

/* USER CODE BEGIN StartDefaultTask */

PCF8574_WriteBit(ETH_RESET_IO,0);       //Æô¶¯PHYоƬ

Tcp_Server_Init();

/* Infinite loop */

for(;;)

{

osDelay(1);

}

/* USER CODE END StartDefaultTask */

}

/* USER CODE BEGIN Header_LEDTask */

/**

* @brief Function implementing the myTaskLED thread.

* @param argument: Not used

* @retval None

*/

/* USER CODE END Header_LEDTask */

void LEDTask(void const * argument)

{

/* USER CODE BEGIN LEDTask */

/* Infinite loop */

for(;;)

{

osDelay(1);

}

/* USER CODE END LEDTask */

}

/* USER CODE BEGIN Header_TCPTask */

/**

* @brief Function implementing the myTaskTCP thread.

* @param argument: Not used

* @retval None

*/

/* USER CODE END Header_TCPTask */

void TCPTask(void const * argument)

{

/* USER CODE BEGIN TCPTask */

/* Infinite loop */

for(;;)

{

osDelay(1);

}

/* USER CODE END TCPTask */

}

接下来我们的开发板连上电脑，保证电脑IP地址和开发板IP地址在同一网段后按Windows+R后输入cmd回车打开CMD，在界面输入ping xxx.xxx.xxx.xxx(xxx代表开发板IP地址)，可以得到

这样开发板就ping通了，这个时候就可以引入服务器或是客户端的代码，实现对应功能。