STM32cubeMX將STM32F767+LAN8720+LwIP+FreeRTOS的以太網實現

通過STM32cubeMX將STM32F767+LAN8720+LwIP+FreeRTOS的以太網實現

本文使用了正點原子的阿波羅開發板，接下來我將粗略的對STM32F767通過STM32cubeMX進行以太網協議配置。

具體步驟

1.首先使能ETH，模式選擇RMII；

2.使能LWIP和FREERTOS；

因爲阿波羅的開發板PHY芯片的ETH_DXT1和ETH_DXT0用的是PG13，PG14引腳，和默認的不同，所以這裏改一下

3.配置時鐘，在這裏我放上我自己的時鐘配置圖，只要不標紅就行，我用的是25MHz外部晶振作時鐘源 ；


4.配置ETH，由於阿波羅開發板的LAN8720芯片的PHYAD0引腳懸空，故PHY Address設置爲0；

5.由於我用的STM32cubeMX的版本是將LAN8742A作爲默認芯片，所以我們這裏不做修改，只用將內部參數改爲LAN8720參數即可；

6.配置LWIP，本人這裏不使用DHCP獲取IP地址等信息，並且我使用的是TCP，所以未對UDP使能，設置如圖；

7.配置FREERTOS，我在這裏加了兩個線程備用

8.按下生成按鈕，生成項目，生成時需要選擇編譯軟件爲自己用的軟件，本人使用的是V5；

由於阿波羅開發板的PHY芯片的RESET引腳是依靠PCF8574的P7位控制，所以我們要在項目中引入PCF8574的代碼，以下代碼可以在阿波羅資料盤中找到

打開main.c裏的加上#include “pcf8574.h”，並在初始化部分將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 */

}

打開freertos.c裏的加上
#include “gpio.h”
#include “sys.h”
#include “pcf8574.h”
#include “tcp_echoserver.h”，並在主線程將PCF8574初的P7管腳使能
PCF8574_WriteBit(ETH_RESET_IO,0);代碼如下

/* 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 */
}

接下來我們的開發板連上電腦，保證電腦IP地址和開發板IP地址在同一網段後按Windows+R後輸入cmd回車打開CMD，在界面輸入ping xxx.xxx.xxx.xxx(xxx代表開發板IP地址)，可以得到

這樣開發板就ping通了，這個時候就可以引入服務器或是客戶端的代碼，實現對應功能。

源碼以上上傳Gitee，鏈接放在旁邊，點贊打賞走一走
ModbusTCP代碼