stm32cubemx4.26版本下tcp udp 客户端和服务器端均不能工作。

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SKYLANGZI 提问时间：2018-9-18 11:12 /

问答
是否解决:

故障现象在netcon下 TCP客户端或服务器端程序均不能正常工作。

硬件平台EVA-407
PHY：DP83848
软件平台：stm32Cubemx

LWIP 2.0版

FREERTOS

我在stm32CubeMx 在针脚配置中

选定如下功能

ｌｗｉｐ及 freertos 均用默认配置
产生代码并编译后，
自已编写如下用户代码这是参照以往的官方例程

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 */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
/* USER CODE BEGIN 2 */
/* init code for LWIP */
MX_LWIP_Init();
/* Initialize tcp echo server */
tcpecho_init();
/* USER CODE END 2 */
/* 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);
/* USER CODE BEGIN RTOS_THREADS */
/* add threads, ... */
/* USER CODE END RTOS_THREADS */
/* USER CODE BEGIN RTOS_QUEUES */
/* add queues, ... */
/* USER CODE END RTOS_QUEUES */

/* 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 */
}

static void tcpecho_thread(void *arg)
{
struct netconn *conn, *newconn;
err_t err;
LWIP_UNUSED_ARG(arg);
/* Create a new connection identifier. */
conn = netconn_new(NETCONN_TCP);
if (conn!=NULL)
{
      /* Bind connection to well known port number 7. */
      err = netconn_bind(conn, NULL, 8080);
      if (err == ERR_OK)
      {
         /* Tell connection to go into listening mode. */
         netconn_listen(conn);
         while (1)
         {
            /* Grab new connection. */
               err= netconn_accept(conn,&newconn);
            /* Process the new connection. */
            if (newconn)
            {
                  struct netbuf *buf;
                  void *data;
                  u16_t len;
                  while ((err = netconn_recv(newconn,&buf)) != NULL)
                  {
                     do
                     {
                        netbuf_data(buf, &data, &len);
                        netconn_write(newconn, data, len, NETCONN_COPY);
                     }
                     while (netbuf_next(buf) >= 0);
                     netbuf_delete(buf);
                  }
                  /* Close connection and discard connection identifier. */
                  netconn_close(newconn);
                  netconn_delete(newconn);
            }
         }
      }
      else
      {
         printf(" can not bind TCP netconn");
      }
}
else
{
      printf("can not create TCP netconn");
}
}
/*-----------------------------------------------------------------------------------*/
void tcpecho_init(void)
{
sys_thread_new("tcpecho_thread", tcpecho_thread, NULL, DEFAULT_THREAD_STACKSIZE, tskIDLE_PRIORITY + 3);
}

运行后用网络调试助手可以连接上开发板，但数据回送。
如果我将开发板开成TCP的客户端，则无法联上服务器。
ｐｉｎｇ　开发板的92.168.1.10是可以ping通的。

我查不到原因，希望能得到指导，或都是有ｓｔｍ３２Ｃｕｂｅｍｘ4.26版本下的ｔｃｐ客户端和服务器端的例程供参考以便查原因。