{"id":23395,"date":"2025-04-19T07:37:04","date_gmt":"2025-04-18T23:37:04","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/23395.html"},"modified":"2025-04-19T07:37:04","modified_gmt":"2025-04-18T23:37:04","slug":"stm32f407lan8720a-lwip-freertos-%e5%ae%9e%e7%8e%b0tcp%e6%9c%8d%e5%8a%a1%e5%99%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/23395.html","title":{"rendered":"STM32F407+LAN8720A +LWIP +FreeRTOS \u5b9e\u73b0TCP\u670d\u52a1\u5668"},"content":{"rendered":"

STM32F407+LAN8720A +LWIP +FreeRTOS UDP\u901a\u8baf \u4e0a\u4e00\u7bc7\u5b9e\u73b0\u4e86UDP\u901a\u8baf<\/p>\n

\u672c\u7bc7\u5b9e\u73b0TCP\u670d\u52a1\u5668<\/h2>\n

\u5b9e\u73b0\u5982\u4e0b\u529f\u80fd：<\/p>\n

TCP\u670d\u52a1\u5668\u63a5\u6536\u6570\u636e\u5e76\u628a\u6570\u636e\u53d1\u9001\u56de\u53bb，\u5b9e\u73b0\u56de\u73af\u3002<\/p>\n

1.\u4ee3\u7801<\/h2>\n

STM32CUBEIDE\u914d\u7f6e\u65b9\u5f0f\u548cudp\u76f8\u540c，\u53ea\u662f\u4ee3\u7801\u4e0d\u540c\u3002 TCP\u670d\u52a1\u5668\u5b9e\u73b0\u7684\u4ee3\u7801\u5982\u4e0b：<\/p>\n

\/\/ tcp\u63a5\u6536\u53d1\u9001\u7f13\u5b58<\/span>
\n\/\/<\/span><\/p>\n

#<\/span>define<\/span> TCP_RX_LEN<\/span> 8192<\/span><\/span><\/span>
\nuint8_t<\/span> TCP_RX_BUF[<\/span>TCP_RX_LEN]<\/span>;<\/span>
\nvolatile<\/span> uint16_t<\/span> TCP_RX_STA =<\/span> 0<\/span>;<\/span> \/* bit15：\u6709\u65e0\u6570\u636e\u6807\u5fd7\u4f4d bit14-0:\u6570\u636e\u91cf\u8ba1\u6570 *\/<\/span>
\nstruct<\/span> tcp_pcb<\/span>*<\/span> tcppcb =<\/span> NULL<\/span>;<\/span><\/p>\n

static<\/span> err_t<\/span> recv_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> struct<\/span> pbuf<\/span> *<\/span>p,<\/span> err_t<\/span> err)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>p ==<\/span> NULL<\/span>)<\/span> \/* \u63a5\u6536\u5230\u7a7a\u5305\u8868\u793a\u5bf9\u65b9\u65ad\u5f00\u8fde\u63a5 *\/<\/span>
\n{<\/span>
\ntcp_server_disconnect<\/span>(<\/span>tpcb)<\/span>;<\/span>
\nerr =<\/span> ERR_CLSD;<\/span>
\n}<\/span>
\nelse<\/span> if<\/span> (<\/span>err !=<\/span> ERR_OK)<\/span> \/* \u6536\u5230\u975e\u7a7a\u5305\u4f46\u662f\u51fa\u73b0\u9519\u8bef *\/<\/span>
\n{<\/span>
\npbuf_free<\/span>(<\/span>p)<\/span>;<\/span>
\n}<\/span>
\nelse<\/span> \/* \u63a5\u6536\u6570\u636e\u6b63\u5e38，\u904d\u5386pbuf\u62f7\u8d1d\u51fa\u63a5\u6536\u5230\u7684\u6570\u636e *\/<\/span>
\n{<\/span>
\nstruct<\/span> pbuf<\/span>*<\/span> it =<\/span> p;<\/span><\/p>\n

if<\/span> (<\/span>(<\/span>TCP_RX_STA &<\/span> 0x8000<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> \/* \u5f53\u524d\u7f13\u5b58\u4e3a\u7a7a *\/<\/span>
\n{<\/span>
\nfor<\/span> (<\/span>it =<\/span> p;<\/span> it !=<\/span> NULL<\/span>;<\/span> it =<\/span> it-><\/span>next)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>TCP_RX_STA +<\/span> it-><\/span>len ><\/span> TCP_RX_LEN)<\/span> \/* \u7f13\u5b58\u6ee1\u4e86 *\/<\/span>
\nbreak<\/span>;<\/span>
\nmemcpy<\/span>(<\/span>TCP_RX_BUF +<\/span> TCP_RX_STA,<\/span> it-><\/span>payload,<\/span> it-><\/span>len)<\/span>;<\/span> \/* \u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u62f7\u8d1d\u5230\u81ea\u5df1\u7684\u7f13\u5b58\u4e2d *\/<\/span>
\nTCP_RX_STA +=<\/span> it-><\/span>len;<\/span>
\n}<\/span>
\nTCP_RX_STA |=<\/span> 0x8000<\/span>;<\/span> \/* \u6807\u8bb0\u6709\u6570\u636e\u6536\u5230 *\/<\/span>
\n}<\/span>
\ntcp_recved<\/span>(<\/span>tpcb,<\/span> p-><\/span>tot_len)<\/span>;<\/span> \/* \u6ed1\u52a8TCP\u7a97\u53e3 *\/<\/span>
\npbuf_free<\/span>(<\/span>p)<\/span>;<\/span> \/* \u91ca\u653epbuf *\/<\/span>
\n}<\/span>
\nreturn<\/span> err;<\/span>
\n}<\/span><\/p>\n

static<\/span> err_t<\/span> accept_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>newpcb,<\/span> err_t<\/span> err)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>tcppcb ==<\/span> NULL<\/span>)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>err ==<\/span> ERR_OK)<\/span>
\n{<\/span>
\ntcppcb =<\/span> newpcb;<\/span>
\ntcp_arg<\/span>(<\/span>newpcb,<\/span> NULL<\/span>)<\/span>;<\/span>
\ntcp_recv<\/span>(<\/span>newpcb,<\/span> recv_callback)<\/span>;<\/span><\/p>\n

printf<\/span>(<\/span>"%s:%d connect.\\\\r\\\\n"<\/span>,<\/span> inet_ntoa<\/span>(<\/span>newpcb-><\/span>remote_ip)<\/span>,<\/span> newpcb-><\/span>remote_port)<\/span>;<\/span>
\n}<\/span>
\nelse<\/span>
\n{<\/span>
\ntcp_server_disconnect<\/span>(<\/span>newpcb)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\nelse<\/span>
\n{<\/span>
\ntcp_abort<\/span>(<\/span>newpcb)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"already connected.\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> err;<\/span>
\n}<\/span><\/p>\n

static<\/span> void<\/span> tcp_server_disconnect<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb)<\/span>
\n{<\/span>
\ntcp_arg<\/span>(<\/span>tpcb,<\/span> NULL<\/span>)<\/span>;<\/span>
\ntcp_recv<\/span>(<\/span>tpcb,<\/span> NULL<\/span>)<\/span>;<\/span><\/p>\n

tcp_abort<\/span>(<\/span>tpcb)<\/span>;<\/span> \/* \u5173\u95ed\u8fde\u63a5\u5e76\u91ca\u653etpcb\u63a7\u5236\u5757 *\/<\/span>
\ntcppcb =<\/span> NULL<\/span>;<\/span>
\nprintf<\/span>(<\/span>"disconnected.\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

static<\/span> uint32_t<\/span> tcp_server_send<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>
\n{<\/span>
\nuint32_t<\/span> nwrite =<\/span> 0<\/span>,<\/span> total =<\/span> 0<\/span>;<\/span>
\nconst<\/span> uint8_t<\/span>*<\/span> p =<\/span> (<\/span>const<\/span> uint8_t<\/span> *<\/span>)<\/span> buf;<\/span>
\nerr_t<\/span> err =<\/span> ERR_OK;<\/span>
\nif<\/span> (<\/span>!<\/span>tpcb)<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\nwhile<\/span> (<\/span>(<\/span>err ==<\/span> ERR_OK)<\/span> &&<\/span> (<\/span>len !=<\/span> 0<\/span>)<\/span> &&<\/span> (<\/span>tcp_sndbuf<\/span>(<\/span>tpcb)<\/span> ><\/span> 0<\/span>)<\/span>)<\/span>
\n{<\/span>
\nnwrite =<\/span> tcp_sndbuf<\/span>(<\/span>tpcb)<\/span> >=<\/span> len ?<\/span> len :<\/span> tcp_sndbuf<\/span>(<\/span>tpcb)<\/span>;<\/span>
\nerr =<\/span> tcp_write<\/span>(<\/span>tpcb,<\/span> p,<\/span> nwrite,<\/span> 1<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>err ==<\/span> ERR_OK)<\/span>
\n{<\/span>
\nlen -=<\/span> nwrite;<\/span>
\ntotal +=<\/span> nwrite;<\/span>
\np +=<\/span> nwrite;<\/span>
\n}<\/span>
\ntcp_output<\/span>(<\/span>tpcb)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> total;<\/span>
\n}<\/span><\/p>\n

\/\/extern int tcp_server_start(uint16_t port);<\/span>
\n\/\/extern int user_senddata(const void* buf,uint32_t len);<\/span>
\n\/\/extern int transfer_data();<\/span><\/p>\n

\/**
\n * \u542f\u52a8TCP\u670d\u52a1\u5668
\n * @param port \u672c\u5730\u7aef\u53e3\u53f7
\n * @return \u6210\u529f\u8fd4\u56de0
\n *\/<\/span>
\nint<\/span> tcp_server_start<\/span>(<\/span>uint16_t<\/span> port)<\/span>
\n{<\/span>
\nint<\/span> ret =<\/span> 0<\/span>;<\/span>
\nstruct<\/span> tcp_pcb<\/span>*<\/span> pcb =<\/span> NULL<\/span>;<\/span>
\nerr_t<\/span> err =<\/span> ERR_OK;<\/span><\/p>\n

\/* create new TCP PCB structure *\/<\/span>
\npcb =<\/span> tcp_new<\/span>(<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>!<\/span>pcb)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Error creating PCB. Out of Memory\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\nret =<\/span> –<\/span>1<\/span>;<\/span>
\ngoto<\/span> __exit;<\/span>
\n}<\/span><\/p>\n

\/* bind to specified @port *\/<\/span>
\nerr =<\/span> tcp_bind<\/span>(<\/span>pcb,<\/span> IP_ADDR_ANY,<\/span> port)<\/span>;<\/span>
\nif<\/span> (<\/span>err !=<\/span> ERR_OK)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Unable to bind to port %d: err = %d\\\\r\\\\n"<\/span>,<\/span> port,<\/span> err)<\/span>;<\/span>
\nret =<\/span> –<\/span>2<\/span>;<\/span>
\ngoto<\/span> __exit;<\/span>
\n}<\/span><\/p>\n

\/* listen for connections *\/<\/span>
\npcb =<\/span> tcp_listen<\/span>(<\/span>pcb)<\/span>;<\/span>
\nif<\/span> (<\/span>!<\/span>pcb)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Out of memory while tcp_listen\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\nret =<\/span> –<\/span>3<\/span>;<\/span>
\n}<\/span><\/p>\n

\/* specify callback to use for incoming connections *\/<\/span>
\ntcp_accept<\/span>(<\/span>pcb,<\/span> accept_callback)<\/span>;<\/span><\/p>\n

\/* create success *\/<\/span>
\nprintf<\/span>(<\/span>"TCP echo server started @ port %d\\\\r\\\\n"<\/span>,<\/span> port)<\/span>;<\/span>
\nreturn<\/span> ret;<\/span><\/p>\n

__exit:<\/span>
\nif<\/span> (<\/span>pcb)<\/span>
\nmemp_free<\/span>(<\/span>MEMP_TCP_PCB,<\/span> pcb)<\/span>;<\/span>
\nreturn<\/span> ret;<\/span>
\n}<\/span><\/p>\n

\/**
\n * TCP\u53d1\u9001\u6570\u636e
\n * @param buf \u5f85\u53d1\u9001\u7684\u6570\u636e
\n * @param len \u6570\u636e\u957f\u5ea6
\n * @return \u8fd4\u56de\u5b9e\u9645\u53d1\u9001\u7684\u5b57\u8282\u6570
\n *\/<\/span>
\nint<\/span> user_senddata<\/span>(<\/span>const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>
\n{<\/span>
\nreturn<\/span> tcp_server_send<\/span>(<\/span>tcppcb,<\/span> buf,<\/span> len)<\/span>;<\/span>
\n}<\/span><\/p>\n

\/**
\n * \u8f6e\u8be2\u51fd\u6570，\u653e\u7f6e\u4e8emain\u51fd\u6570\u7684while\u6b7b\u5faa\u73af\u4e2d
\n * @return \u65e0
\n *\/<\/span>
\nint<\/span> transfer_data<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\nuint32_t<\/span> nsend =<\/span> 0<\/span>;<\/span>
\nif<\/span> (<\/span>tcppcb !=<\/span> NULL<\/span> &&<\/span> tcppcb-><\/span>state ==<\/span> ESTABLISHED)<\/span> \/* \u8fde\u63a5\u6709\u6548 *\/<\/span>
\n{<\/span>
\nif<\/span> (<\/span>TCP_RX_STA &<\/span> 0x8000<\/span>)<\/span> \/* \u6709\u6570\u636e\u6536\u5230 *\/<\/span>
\n{<\/span>
\nnsend =<\/span> user_senddata<\/span>(<\/span>TCP_RX_BUF,<\/span> TCP_RX_STA &<\/span> 0x7FFF<\/span>)<\/span>;<\/span> \/* \u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u53d1\u56de\u53bb *\/<\/span>
\nTCP_RX_STA =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"send %d bytes success\\\\r\\\\n"<\/span>,<\/span> nsend)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span><\/p>\n

freertos.c\u7684\u5168\u90e8\u4ee3\u7801\u5982\u4e0b：<\/p>\n

\/* USER CODE BEGIN Header *\/<\/span>
\n\/**
\n ******************************************************************************
\n * File Name : freertos.c
\n * Description : Code for freertos applications
\n ******************************************************************************
\n * @attention
\n *
\n * Copyright (c) 2024 STMicroelectronics.
\n * All rights reserved.
\n *
\n * This software is licensed under terms that can be found in the LICENSE file
\n * in the root directory of this software component.
\n * If no LICENSE file comes with this software, it is provided AS-IS.
\n *
\n ******************************************************************************
\n *\/<\/span>
\n\/* USER CODE END Header *\/<\/span><\/p>\n

\/* Includes ——————————————————————*\/<\/span>
\n#<\/span>include<\/span> "FreeRTOS.h"<\/span><\/span>
\n#<\/span>include<\/span> "task.h"<\/span><\/span>
\n#<\/span>include<\/span> "main.h"<\/span><\/span>
\n#<\/span>include<\/span> "cmsis_os.h"<\/span><\/span><\/p>\n

\/* Private includes ———————————————————-*\/<\/span>
\n\/* USER CODE BEGIN Includes *\/<\/span>
\n#<\/span>include<\/span> "stdio.h"<\/span><\/span><\/p>\n

#<\/span>include<\/span> <string.h><\/span><\/span>
\n#<\/span>include<\/span> <stdint.h><\/span><\/span>
\n#<\/span>include<\/span> "lwip\/tcp.h"<\/span><\/span>
\n#<\/span>include<\/span> "lwip\/err.h"<\/span><\/span>
\n#<\/span>include<\/span> "lwip\/memp.h"<\/span><\/span>
\n#<\/span>include<\/span> "lwip\/inet.h"<\/span><\/span>
\n\/* USER CODE END Includes *\/<\/span><\/p>\n

\/* Private typedef ———————————————————–*\/<\/span>
\n\/* USER CODE BEGIN PTD *\/<\/span><\/p>\n

\/* USER CODE END PTD *\/<\/span><\/p>\n

\/* Private define ————————————————————*\/<\/span>
\n\/* USER CODE BEGIN PD *\/<\/span><\/p>\n

\/* USER CODE END PD *\/<\/span><\/p>\n

\/* Private macro ————————————————————-*\/<\/span>
\n\/* USER CODE BEGIN PM *\/<\/span><\/p>\n

\/* USER CODE END PM *\/<\/span><\/p>\n

\/* Private variables ———————————————————*\/<\/span>
\n\/* USER CODE BEGIN Variables *\/<\/span>
\n\/\/ tcp\u63a5\u6536\u53d1\u9001\u7f13\u5b58<\/span>
\n\/\/<\/span><\/p>\n

#<\/span>define<\/span> TCP_RX_LEN<\/span> 8192<\/span><\/span><\/span>
\nuint8_t<\/span> TCP_RX_BUF[<\/span>TCP_RX_LEN]<\/span>;<\/span>
\nvolatile<\/span> uint16_t<\/span> TCP_RX_STA =<\/span> 0<\/span>;<\/span> \/* bit15：\u6709\u65e0\u6570\u636e\u6807\u5fd7\u4f4d bit14-0:\u6570\u636e\u91cf\u8ba1\u6570 *\/<\/span>
\nstruct<\/span> tcp_pcb<\/span>*<\/span> tcppcb =<\/span> NULL<\/span>;<\/span>
\n\/* USER CODE END Variables *\/<\/span>
\nosThreadId defaultTaskHandle;<\/span>
\nosThreadId LEDTaskHandle;<\/span>
\nosThreadId UARTTask03Handle;<\/span>
\nosSemaphoreId uartBinarySem01Handle;<\/span><\/p>\n

\/* Private function prototypes ———————————————–*\/<\/span>
\n\/* USER CODE BEGIN FunctionPrototypes *\/<\/span>
\nstatic<\/span> void<\/span> tcp_server_disconnect<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb)<\/span>;<\/span>
\nstatic<\/span> uint32_t<\/span> tcp_server_send<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>;<\/span>
\nint<\/span> transfer_data<\/span>(<\/span>void<\/span>)<\/span>;<\/span>
\nint<\/span> user_senddata<\/span>(<\/span>const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>;<\/span>
\nint<\/span> tcp_server_start<\/span>(<\/span>uint16_t<\/span> port)<\/span>;<\/span>
\nstatic<\/span> uint32_t<\/span> tcp_server_send<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>;<\/span>
\nstatic<\/span> void<\/span> tcp_server_disconnect<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb)<\/span>;<\/span>
\nstatic<\/span> err_t<\/span> accept_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>newpcb,<\/span> err_t<\/span> err)<\/span>;<\/span>
\nstatic<\/span> err_t<\/span> recv_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> struct<\/span> pbuf<\/span> *<\/span>p,<\/span> err_t<\/span> err)<\/span>;<\/span><\/p>\n

\/* USER CODE END FunctionPrototypes *\/<\/span><\/p>\n

void<\/span> StartDefaultTask<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>;<\/span>
\nvoid<\/span> StartTask_LED<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>;<\/span>
\nvoid<\/span> StartTask_UART<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>;<\/span><\/p>\n

extern<\/span> void<\/span> MX_LWIP_Init<\/span>(<\/span>void<\/span>)<\/span>;<\/span>
\nvoid<\/span> MX_FREERTOS_Init<\/span>(<\/span>void<\/span>)<\/span>;<\/span> \/* (MISRA C 2004 rule 8.1) *\/<\/span><\/p>\n

\/* GetIdleTaskMemory prototype (linked to static allocation support) *\/<\/span>
\nvoid<\/span> vApplicationGetIdleTaskMemory<\/span>(<\/span> StaticTask_t *<\/span>*<\/span>ppxIdleTaskTCBBuffer,<\/span> StackType_t *<\/span>*<\/span>ppxIdleTaskStackBuffer,<\/span> uint32_t<\/span> *<\/span>pulIdleTaskStackSize )<\/span>;<\/span><\/p>\n

\/* USER CODE BEGIN GET_IDLE_TASK_MEMORY *\/<\/span>
\nstatic<\/span> StaticTask_t xIdleTaskTCBBuffer;<\/span>
\nstatic<\/span> StackType_t xIdleStack[<\/span>configMINIMAL_STACK_SIZE]<\/span>;<\/span><\/p>\n

void<\/span> vApplicationGetIdleTaskMemory<\/span>(<\/span> StaticTask_t *<\/span>*<\/span>ppxIdleTaskTCBBuffer,<\/span> StackType_t *<\/span>*<\/span>ppxIdleTaskStackBuffer,<\/span> uint32_t<\/span> *<\/span>pulIdleTaskStackSize )<\/span>
\n{<\/span>
\n *<\/span>ppxIdleTaskTCBBuffer =<\/span> &<\/span>xIdleTaskTCBBuffer;<\/span>
\n *<\/span>ppxIdleTaskStackBuffer =<\/span> &<\/span>xIdleStack[<\/span>0<\/span>]<\/span>;<\/span>
\n *<\/span>pulIdleTaskStackSize =<\/span> configMINIMAL_STACK_SIZE;<\/span>
\n \/* place for user code *\/<\/span>
\n}<\/span>
\n\/* USER CODE END GET_IDLE_TASK_MEMORY *\/<\/span><\/p>\n

\/**
\n * @brief FreeRTOS initialization
\n * @param None
\n * @retval None
\n *\/<\/span>
\nvoid<\/span> MX_FREERTOS_Init<\/span>(<\/span>void<\/span>)<\/span> {<\/span>
\n \/* USER CODE BEGIN Init *\/<\/span><\/p>\n

\/* USER CODE END Init *\/<\/span><\/p>\n

\/* USER CODE BEGIN RTOS_MUTEX *\/<\/span>
\n \/* add mutexes, … *\/<\/span>
\n \/* USER CODE END RTOS_MUTEX *\/<\/span><\/p>\n

\/* Create the semaphores(s) *\/<\/span>
\n \/* definition and creation of uartBinarySem01 *\/<\/span>
\n osSemaphoreDef<\/span>(<\/span>uartBinarySem01)<\/span>;<\/span>
\n uartBinarySem01Handle =<\/span> osSemaphoreCreate<\/span>(<\/span>osSemaphore<\/span>(<\/span>uartBinarySem01)<\/span>,<\/span> 1<\/span>)<\/span>;<\/span><\/p>\n

\/* USER CODE BEGIN RTOS_SEMAPHORES *\/<\/span>
\n \/* add semaphores, … *\/<\/span>
\n \/* USER CODE END RTOS_SEMAPHORES *\/<\/span><\/p>\n

\/* USER CODE BEGIN RTOS_TIMERS *\/<\/span>
\n \/* start timers, add new ones, … *\/<\/span>
\n \/* USER CODE END RTOS_TIMERS *\/<\/span><\/p>\n

\/* USER CODE BEGIN RTOS_QUEUES *\/<\/span>
\n \/* add queues, … *\/<\/span>
\n \/* USER CODE END RTOS_QUEUES *\/<\/span><\/p>\n

\/* Create the thread(s) *\/<\/span>
\n \/* definition and creation of defaultTask *\/<\/span>
\n osThreadDef<\/span>(<\/span>defaultTask,<\/span> StartDefaultTask,<\/span> osPriorityNormal,<\/span> 0<\/span>,<\/span> 2048<\/span>)<\/span>;<\/span>
\n defaultTaskHandle =<\/span> osThreadCreate<\/span>(<\/span>osThread<\/span>(<\/span>defaultTask)<\/span>,<\/span> NULL<\/span>)<\/span>;<\/span><\/p>\n

\/* definition and creation of LEDTask *\/<\/span>
\n osThreadDef<\/span>(<\/span>LEDTask,<\/span> StartTask_LED,<\/span> osPriorityIdle,<\/span> 0<\/span>,<\/span> 256<\/span>)<\/span>;<\/span>
\n LEDTaskHandle =<\/span> osThreadCreate<\/span>(<\/span>osThread<\/span>(<\/span>LEDTask)<\/span>,<\/span> NULL<\/span>)<\/span>;<\/span><\/p>\n

\/* definition and creation of UARTTask03 *\/<\/span>
\n osThreadDef<\/span>(<\/span>UARTTask03,<\/span> StartTask_UART,<\/span> osPriorityIdle,<\/span> 0<\/span>,<\/span> 512<\/span>)<\/span>;<\/span>
\n UARTTask03Handle =<\/span> osThreadCreate<\/span>(<\/span>osThread<\/span>(<\/span>UARTTask03)<\/span>,<\/span> NULL<\/span>)<\/span>;<\/span><\/p>\n

\/* USER CODE BEGIN RTOS_THREADS *\/<\/span>
\n \/* add threads, … *\/<\/span>
\n \/* USER CODE END RTOS_THREADS *\/<\/span><\/p>\n

}<\/span><\/p>\n

\/* USER CODE BEGIN Header_StartDefaultTask *\/<\/span>
\n\/**
\n * @brief Function implementing the defaultTask thread.
\n * @param argument: Not used
\n * @retval None
\n *\/<\/span>
\n\/* USER CODE END Header_StartDefaultTask *\/<\/span>
\nvoid<\/span> StartDefaultTask<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>
\n{<\/span>
\n \/* init code for LWIP *\/<\/span>
\n MX_LWIP_Init<\/span>(<\/span>)<\/span>;<\/span>
\n \/* USER CODE BEGIN StartDefaultTask *\/<\/span>
\n \/* Infinite loop *\/<\/span>
\n int<\/span> ret =<\/span> tcp_server_start<\/span>(<\/span>6001<\/span>)<\/span>;<\/span>
\n if<\/span>(<\/span>ret !=<\/span>0<\/span>)<\/span> return<\/span>;<\/span>
\n for<\/span>(<\/span>;<\/span>;<\/span>)<\/span>
\n {<\/span>
\ntransfer_data<\/span>(<\/span>)<\/span>;<\/span>
\n osDelay<\/span>(<\/span>100<\/span>)<\/span>;<\/span>
\n }<\/span>
\n \/* USER CODE END StartDefaultTask *\/<\/span>
\n}<\/span><\/p>\n

\/* USER CODE BEGIN Header_StartTask_LED *\/<\/span>
\n\/**
\n* @brief Function implementing the LEDTask thread.
\n* @param argument: Not used
\n* @retval None
\n*\/<\/span>
\n\/* USER CODE END Header_StartTask_LED *\/<\/span>
\nvoid<\/span> StartTask_LED<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>
\n{<\/span>
\n \/* USER CODE BEGIN StartTask_LED *\/<\/span>
\n \/* Infinite loop *\/<\/span>
\n for<\/span>(<\/span>;<\/span>;<\/span>)<\/span>
\n {<\/span>
\nHAL_GPIO_TogglePin<\/span>(<\/span>GPIOE,<\/span> LED0_Pin|<\/span>LED1_Pin)<\/span>;<\/span>
\n osDelay<\/span>(<\/span>300<\/span>)<\/span>;<\/span>
\n }<\/span>
\n \/* USER CODE END StartTask_LED *\/<\/span>
\n}<\/span><\/p>\n

\/* USER CODE BEGIN Header_StartTask_UART *\/<\/span>
\n\/**
\n* @brief Function implementing the UARTTask03 thread.
\n* @param argument: Not used
\n* @retval None
\n*\/<\/span>
\n\/* USER CODE END Header_StartTask_UART *\/<\/span>
\nvoid<\/span> StartTask_UART<\/span>(<\/span>void<\/span> const<\/span> *<\/span> argument)<\/span>
\n{<\/span>
\n \/* USER CODE BEGIN StartTask_UART *\/<\/span>
\n \/* Infinite loop *\/<\/span>
\n\/\/printf("freertos start\\\\r\\\\n");<\/span>
\n for<\/span>(<\/span>;<\/span>;<\/span>)<\/span>
\n {<\/span><\/p>\n

osDelay<\/span>(<\/span>1000<\/span>)<\/span>;<\/span>
\n }<\/span>
\n \/* USER CODE END StartTask_UART *\/<\/span>
\n}<\/span><\/p>\n

\/* Private application code ————————————————–*\/<\/span>
\n\/* USER CODE BEGIN Application *\/<\/span>
\nstatic<\/span> err_t<\/span> recv_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> struct<\/span> pbuf<\/span> *<\/span>p,<\/span> err_t<\/span> err)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>p ==<\/span> NULL<\/span>)<\/span> \/* \u63a5\u6536\u5230\u7a7a\u5305\u8868\u793a\u5bf9\u65b9\u65ad\u5f00\u8fde\u63a5 *\/<\/span>
\n{<\/span>
\ntcp_server_disconnect<\/span>(<\/span>tpcb)<\/span>;<\/span>
\nerr =<\/span> ERR_CLSD;<\/span>
\n}<\/span>
\nelse<\/span> if<\/span> (<\/span>err !=<\/span> ERR_OK)<\/span> \/* \u6536\u5230\u975e\u7a7a\u5305\u4f46\u662f\u51fa\u73b0\u9519\u8bef *\/<\/span>
\n{<\/span>
\npbuf_free<\/span>(<\/span>p)<\/span>;<\/span>
\n}<\/span>
\nelse<\/span> \/* \u63a5\u6536\u6570\u636e\u6b63\u5e38，\u904d\u5386pbuf\u62f7\u8d1d\u51fa\u63a5\u6536\u5230\u7684\u6570\u636e *\/<\/span>
\n{<\/span>
\nstruct<\/span> pbuf<\/span>*<\/span> it =<\/span> p;<\/span><\/p>\n

if<\/span> (<\/span>(<\/span>TCP_RX_STA &<\/span> 0x8000<\/span>)<\/span> ==<\/span> 0<\/span>)<\/span> \/* \u5f53\u524d\u7f13\u5b58\u4e3a\u7a7a *\/<\/span>
\n{<\/span>
\nfor<\/span> (<\/span>it =<\/span> p;<\/span> it !=<\/span> NULL<\/span>;<\/span> it =<\/span> it-><\/span>next)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>TCP_RX_STA +<\/span> it-><\/span>len ><\/span> TCP_RX_LEN)<\/span> \/* \u7f13\u5b58\u6ee1\u4e86 *\/<\/span>
\nbreak<\/span>;<\/span>
\nmemcpy<\/span>(<\/span>TCP_RX_BUF +<\/span> TCP_RX_STA,<\/span> it-><\/span>payload,<\/span> it-><\/span>len)<\/span>;<\/span> \/* \u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u62f7\u8d1d\u5230\u81ea\u5df1\u7684\u7f13\u5b58\u4e2d *\/<\/span>
\nTCP_RX_STA +=<\/span> it-><\/span>len;<\/span>
\n}<\/span>
\nTCP_RX_STA |=<\/span> 0x8000<\/span>;<\/span> \/* \u6807\u8bb0\u6709\u6570\u636e\u6536\u5230 *\/<\/span>
\n}<\/span>
\ntcp_recved<\/span>(<\/span>tpcb,<\/span> p-><\/span>tot_len)<\/span>;<\/span> \/* \u6ed1\u52a8TCP\u7a97\u53e3 *\/<\/span>
\npbuf_free<\/span>(<\/span>p)<\/span>;<\/span> \/* \u91ca\u653epbuf *\/<\/span>
\n}<\/span>
\nreturn<\/span> err;<\/span>
\n}<\/span><\/p>\n

static<\/span> err_t<\/span> accept_callback<\/span>(<\/span>void<\/span> *<\/span>arg,<\/span> struct<\/span> tcp_pcb<\/span> *<\/span>newpcb,<\/span> err_t<\/span> err)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>tcppcb ==<\/span> NULL<\/span>)<\/span>
\n{<\/span>
\nif<\/span> (<\/span>err ==<\/span> ERR_OK)<\/span>
\n{<\/span>
\ntcppcb =<\/span> newpcb;<\/span>
\ntcp_arg<\/span>(<\/span>newpcb,<\/span> NULL<\/span>)<\/span>;<\/span>
\ntcp_recv<\/span>(<\/span>newpcb,<\/span> recv_callback)<\/span>;<\/span><\/p>\n

printf<\/span>(<\/span>"%s:%d connect.\\\\r\\\\n"<\/span>,<\/span> inet_ntoa<\/span>(<\/span>newpcb-><\/span>remote_ip)<\/span>,<\/span> newpcb-><\/span>remote_port)<\/span>;<\/span>
\n}<\/span>
\nelse<\/span>
\n{<\/span>
\ntcp_server_disconnect<\/span>(<\/span>newpcb)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\nelse<\/span>
\n{<\/span>
\ntcp_abort<\/span>(<\/span>newpcb)<\/span>;<\/span>
\nprintf<\/span>(<\/span>"already connected.\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> err;<\/span>
\n}<\/span><\/p>\n

static<\/span> void<\/span> tcp_server_disconnect<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb)<\/span>
\n{<\/span>
\ntcp_arg<\/span>(<\/span>tpcb,<\/span> NULL<\/span>)<\/span>;<\/span>
\ntcp_recv<\/span>(<\/span>tpcb,<\/span> NULL<\/span>)<\/span>;<\/span><\/p>\n

tcp_abort<\/span>(<\/span>tpcb)<\/span>;<\/span> \/* \u5173\u95ed\u8fde\u63a5\u5e76\u91ca\u653etpcb\u63a7\u5236\u5757 *\/<\/span>
\ntcppcb =<\/span> NULL<\/span>;<\/span>
\nprintf<\/span>(<\/span>"disconnected.\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\n}<\/span><\/p>\n

static<\/span> uint32_t<\/span> tcp_server_send<\/span>(<\/span>struct<\/span> tcp_pcb<\/span> *<\/span>tpcb,<\/span> const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>
\n{<\/span>
\nuint32_t<\/span> nwrite =<\/span> 0<\/span>,<\/span> total =<\/span> 0<\/span>;<\/span>
\nconst<\/span> uint8_t<\/span>*<\/span> p =<\/span> (<\/span>const<\/span> uint8_t<\/span> *<\/span>)<\/span> buf;<\/span>
\nerr_t<\/span> err =<\/span> ERR_OK;<\/span>
\nif<\/span> (<\/span>!<\/span>tpcb)<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\nwhile<\/span> (<\/span>(<\/span>err ==<\/span> ERR_OK)<\/span> &&<\/span> (<\/span>len !=<\/span> 0<\/span>)<\/span> &&<\/span> (<\/span>tcp_sndbuf<\/span>(<\/span>tpcb)<\/span> ><\/span> 0<\/span>)<\/span>)<\/span>
\n{<\/span>
\nnwrite =<\/span> tcp_sndbuf<\/span>(<\/span>tpcb)<\/span> >=<\/span> len ?<\/span> len :<\/span> tcp_sndbuf<\/span>(<\/span>tpcb)<\/span>;<\/span>
\nerr =<\/span> tcp_write<\/span>(<\/span>tpcb,<\/span> p,<\/span> nwrite,<\/span> 1<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>err ==<\/span> ERR_OK)<\/span>
\n{<\/span>
\nlen -=<\/span> nwrite;<\/span>
\ntotal +=<\/span> nwrite;<\/span>
\np +=<\/span> nwrite;<\/span>
\n}<\/span>
\ntcp_output<\/span>(<\/span>tpcb)<\/span>;<\/span>
\n}<\/span>
\nreturn<\/span> total;<\/span>
\n}<\/span><\/p>\n

\/**
\n * \u542f\u52a8TCP\u670d\u52a1\u5668
\n * @param port \u672c\u5730\u7aef\u53e3\u53f7
\n * @return \u6210\u529f\u8fd4\u56de0
\n *\/<\/span>
\nint<\/span> tcp_server_start<\/span>(<\/span>uint16_t<\/span> port)<\/span>
\n{<\/span>
\nint<\/span> ret =<\/span> 0<\/span>;<\/span>
\nstruct<\/span> tcp_pcb<\/span>*<\/span> pcb =<\/span> NULL<\/span>;<\/span>
\nerr_t<\/span> err =<\/span> ERR_OK;<\/span><\/p>\n

\/* create new TCP PCB structure *\/<\/span>
\npcb =<\/span> tcp_new<\/span>(<\/span>)<\/span>;<\/span>
\nif<\/span> (<\/span>!<\/span>pcb)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Error creating PCB. Out of Memory\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\nret =<\/span> –<\/span>1<\/span>;<\/span>
\ngoto<\/span> __exit;<\/span>
\n}<\/span><\/p>\n

\/* bind to specified @port *\/<\/span>
\nerr =<\/span> tcp_bind<\/span>(<\/span>pcb,<\/span> IP_ADDR_ANY,<\/span> port)<\/span>;<\/span>
\nif<\/span> (<\/span>err !=<\/span> ERR_OK)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Unable to bind to port %d: err = %d\\\\r\\\\n"<\/span>,<\/span> port,<\/span> err)<\/span>;<\/span>
\nret =<\/span> –<\/span>2<\/span>;<\/span>
\ngoto<\/span> __exit;<\/span>
\n}<\/span><\/p>\n

\/* listen for connections *\/<\/span>
\npcb =<\/span> tcp_listen<\/span>(<\/span>pcb)<\/span>;<\/span>
\nif<\/span> (<\/span>!<\/span>pcb)<\/span>
\n{<\/span>
\nprintf<\/span>(<\/span>"Out of memory while tcp_listen\\\\r\\\\n"<\/span>)<\/span>;<\/span>
\nret =<\/span> –<\/span>3<\/span>;<\/span>
\n}<\/span><\/p>\n

\/* specify callback to use for incoming connections *\/<\/span>
\ntcp_accept<\/span>(<\/span>pcb,<\/span> accept_callback)<\/span>;<\/span><\/p>\n

\/* create success *\/<\/span>
\nprintf<\/span>(<\/span>"TCP echo server started @ port %d\\\\r\\\\n"<\/span>,<\/span> port)<\/span>;<\/span>
\nreturn<\/span> ret;<\/span><\/p>\n

__exit:<\/span>
\nif<\/span> (<\/span>pcb)<\/span>
\nmemp_free<\/span>(<\/span>MEMP_TCP_PCB,<\/span> pcb)<\/span>;<\/span>
\nreturn<\/span> ret;<\/span>
\n}<\/span><\/p>\n

\/**
\n * TCP\u53d1\u9001\u6570\u636e
\n * @param buf \u5f85\u53d1\u9001\u7684\u6570\u636e
\n * @param len \u6570\u636e\u957f\u5ea6
\n * @return \u8fd4\u56de\u5b9e\u9645\u53d1\u9001\u7684\u5b57\u8282\u6570
\n *\/<\/span>
\nint<\/span> user_senddata<\/span>(<\/span>const<\/span> void<\/span>*<\/span> buf,<\/span> uint32_t<\/span> len)<\/span>
\n{<\/span>
\nreturn<\/span> tcp_server_send<\/span>(<\/span>tcppcb,<\/span> buf,<\/span> len)<\/span>;<\/span>
\n}<\/span><\/p>\n

\/**
\n * \u8f6e\u8be2\u51fd\u6570，\u653e\u7f6e\u4e8emain\u51fd\u6570\u7684while\u6b7b\u5faa\u73af\u4e2d
\n * @return \u65e0
\n *\/<\/span>
\nint<\/span> transfer_data<\/span>(<\/span>void<\/span>)<\/span>
\n{<\/span>
\nuint32_t<\/span> nsend =<\/span> 0<\/span>;<\/span>
\nif<\/span> (<\/span>tcppcb !=<\/span> NULL<\/span> &&<\/span> tcppcb-><\/span>state ==<\/span> ESTABLISHED)<\/span> \/* \u8fde\u63a5\u6709\u6548 *\/<\/span>
\n{<\/span>
\nif<\/span> (<\/span>TCP_RX_STA &<\/span> 0x8000<\/span>)<\/span> \/* \u6709\u6570\u636e\u6536\u5230 *\/<\/span>
\n{<\/span>
\nnsend =<\/span> user_senddata<\/span>(<\/span>TCP_RX_BUF,<\/span> TCP_RX_STA &<\/span> 0x7FFF<\/span>)<\/span>;<\/span> \/* \u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u53d1\u56de\u53bb *\/<\/span>
\nTCP_RX_STA =<\/span> 0<\/span>;<\/span>
\nprintf<\/span>(<\/span>"send %d bytes success\\\\r\\\\n"<\/span>,<\/span> nsend)<\/span>;<\/span>
\n}<\/span>
\n}<\/span>
\nreturn<\/span> 0<\/span>;<\/span>
\n}<\/span>
\n\/* USER CODE END Application *\/<\/span><\/p>\n

2.\u4e0b\u8f7d\u8fd0\u884c\u6d4b\u8bd5<\/h2>\n

\u4e0b\u8f7d\u5b8c\u6210\u540e，\u4e32\u53e3\u8f93\u51fa：TCP echo server started @ port 6001 netif_up \u70b9\u51fb\u7f51\u7edc\u8c03\u8bd5\u52a9\u624b\u7684\u8fde\u63a5\u6309\u94ae，\u663e\u793a\u8fde\u63a5\u6210\u529f，\u4e32\u53e3\u8f93\u51fa：192.168.111.11:57991 connect. \u70b9\u51fb\u7f51\u7edc\u8c03\u8bd5\u52a9\u624b\u7684\u53d1\u9001，\u7f51\u7edc\u8c03\u8bd5\u52a9\u624b\u7684\u63a5\u6536\u533a\u663e\u793a\u6536\u5230\u76f8\u540c\u7684\u6570\u636e，\u540c\u65f6\u4e32\u53e3\u6253\u5370\u63a5\u6536\u5b57\u8282\u6570 \u70b9\u51fb\u7f51\u7edc\u8c03\u8bd5\u52a9\u624b\u7684\u65ad\u5f00，\u4e32\u53e3\u8f93\u51fa：disconnected. \u518d\u6b21\u70b9\u51fb\u8fde\u63a5\u540e\u53ef\u4ee5\u7ee7\u7eed\u901a\u8baf\u3002 \"\u5728\u8fd9\u91cc\u63d2\u5165\u56fe\u7247\u63cf\u8ff0\" \u4ee3\u7801\u90e8\u5206\u53c2\u8003\u4e86 \u8fd9\u7bc7\u6587\u7ae0 STM32F407 + LAN8720A + LWIP \u5b9e\u73b0TCP\u670d\u52a1\u5668<\/p>\n","protected":false},"excerpt":{"rendered":"

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