{"id":25598,"date":"2025-04-19T13:16:25","date_gmt":"2025-04-19T05:16:25","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/25598.html"},"modified":"2025-04-19T13:16:25","modified_gmt":"2025-04-19T05:16:25","slug":"stm32-%e5%ae%9e%e7%8e%b0-tcp-%e6%9c%8d%e5%8a%a1%e5%99%a8%e4%b8%8e%e5%a4%9a%e4%b8%aa%e8%ae%be%e5%a4%87%e9%80%9a%e4%bf%a1","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/25598.html","title":{"rendered":"STM32 \u5b9e\u73b0 TCP \u670d\u52a1\u5668\u4e0e\u591a\u4e2a\u8bbe\u5907\u901a\u4fe1"},"content":{"rendered":"

\"\"<\/p>\n

\u76ee\u5f55<\/p>\n

\u4e00\u3001\u5f15\u8a00<\/p>\n

\u4e8c\u3001\u786c\u4ef6\u51c6\u5907<\/p>\n

\u4e09\u3001\u8f6f\u4ef6\u51c6\u5907<\/p>\n

\u56db\u3001LWIP \u534f\u8bae\u6808\u7684\u914d\u7f6e\u4e0e\u521d\u59cb\u5316<\/p>\n

\u4e94\u3001\u521b\u5efa TCP \u670d\u52a1\u5668<\/p>\n

1.\u521b\u5efa\u4efb\u52a1\u4ee5\u53ca\u5168\u5c40\u53d8\u91cf<\/p>\n

2.\u521b\u5efa TCP \u63a7\u5236\u5757<\/p>\n

3.\u7ed1\u5b9a\u7aef\u53e3\u00a0<\/p>\n

4.\u00a0\u8fdb\u5165\u76d1\u542c\u72b6\u6001<\/p>\n

5.\u8bbe\u7f6e\u63a5\u6536\u56de\u8c03\u51fd\u6570\u00a0<\/p>\n

\u516d\u3001\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u00a0<\/p>\n

\u4e03\u3001\u603b\u7ed3\u00a0<\/p>\n

\n

\n
\n

\u4e00\u3001\u5f15\u8a00<\/h2>\n<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u4e2d，\u5e38\u5e38\u9700\u8981\u5b9e\u73b0\u8bbe\u5907\u4e4b\u95f4\u7684\u7f51\u7edc\u901a\u4fe1\u3002STM32 \u4f5c\u4e3a\u4e00\u6b3e\u5e7f\u6cdb\u5e94\u7528\u7684\u5fae\u63a7\u5236\u5668，\u7ed3\u5408\u7f51\u7edc\u901a\u4fe1\u529f\u80fd\u53ef\u4ee5\u5b9e\u73b0\u4e0e\u591a\u4e2a\u8bbe\u5907\u7684\u4ea4\u4e92\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 STM32 \u4e0a\u5b9e\u73b0 TCP \u670d\u52a1\u5668\u7aef，\u4ee5\u4fbf\u4e0e\u591a\u4e2a\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002<\/p>\n<\/p>\n

\u4e8c\u3001\u786c\u4ef6\u51c6\u5907<\/h2>\n<\/p>\n
  • STM32 \u5f00\u53d1\u677f：\u9009\u62e9\u4e00\u6b3e\u5e26\u6709\u4ee5\u592a\u7f51\u63a5\u53e3\u7684 STM32 \u5f00\u53d1\u677f，\u5982 STM32F429 \u7cfb\u5217\u7b49\u3002<\/li>\n
  • \u4ee5\u592a\u7f51\u6a21\u5757（\u53ef\u9009）：\u5982\u679c\u5f00\u53d1\u677f\u6ca1\u6709\u5185\u7f6e\u4ee5\u592a\u7f51\u63a5\u53e3，\u53ef\u4ee5\u9009\u62e9\u4e00\u4e2a\u5916\u63a5\u7684\u4ee5\u592a\u7f51\u6a21\u5757，\u5982 W5500 \u7b49\u3002<\/li>\n
  • \u7f51\u7edc\u8fde\u63a5：\u5c06\u5f00\u53d1\u677f\u8fde\u63a5\u5230\u540c\u4e00\u5c40\u57df\u7f51\u5185，\u786e\u4fdd\u5176\u4ed6\u8bbe\u5907\u53ef\u4ee5\u901a\u8fc7\u7f51\u7edc\u8bbf\u95ee\u5230 STM32 \u5f00\u53d1\u677f\u3002<\/li>\n

    \u4e09\u3001\u8f6f\u4ef6\u51c6\u5907<\/h2>\n<\/p>\n
  • \u5f00\u53d1\u73af\u5883：\u5982 Keil MDK\u3001IAR Embedded Workbench \u7b49\u3002<\/li>\n
  • LWIP（Lightweight IP）\u534f\u8bae\u6808：LWIP \u662f\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684 TCP\/IP \u534f\u8bae\u6808，\u9002\u7528\u4e8e\u5d4c\u5165\u5f0f\u7cfb\u7edf\u3002\u53ef\u4ee5\u4ece LWIP \u5b98\u65b9\u7f51\u7ad9\u4e0b\u8f7d\u5e76\u96c6\u6210\u5230\u5f00\u53d1\u73af\u5883\u4e2d\u3002<\/li>\n
  • STM32 \u5e93：\u4f7f\u7528 STM32 \u7684\u5b98\u65b9\u5e93\u6216\u8005\u5176\u4ed6\u7b2c\u4e09\u65b9\u5e93\u6765\u8fdb\u884c\u786c\u4ef6\u9a71\u52a8\u548c\u5f00\u53d1\u3002<\/li>\n

    \u56db\u3001LWIP \u534f\u8bae\u6808\u7684\u914d\u7f6e\u4e0e\u521d\u59cb\u5316<\/h2>\n<\/p>\n
  • \u5c06 LWIP \u534f\u8bae\u6808\u7684\u6e90\u6587\u4ef6\u6dfb\u52a0\u5230 STM32 \u9879\u76ee\u4e2d，\u5e76\u8bbe\u7f6e\u6b63\u786e\u7684\u7f16\u8bd1\u9009\u9879\u3002<\/li>\n
  • \u5728\u9879\u76ee\u7684\u521d\u59cb\u5316\u4ee3\u7801\u4e2d，\u8c03\u7528 LWIP \u7684\u521d\u59cb\u5316\u51fd\u6570lwip_init()<\/span>，\u5b8c\u6210\u534f\u8bae\u6808\u7684\u521d\u59cb\u5316\u3002<\/li>\n
  • \u6839\u636e\u5b9e\u9645\u9700\u6c42，\u914d\u7f6e LWIP \u7684\u53c2\u6570，\u5982 IP \u5730\u5740\u3001\u5b50\u7f51\u63a9\u7801\u3001\u9ed8\u8ba4\u7f51\u5173\u7b49\u3002\u53ef\u4ee5\u901a\u8fc7\u4fee\u6539lwipopts.h\u6587\u4ef6\u6765\u5b9e\u73b0\u3002<\/li>\n

    \u4e94\u3001\u521b\u5efa TCP \u670d\u52a1\u5668<\/h2>\n

    1.\u521b\u5efa\u4efb\u52a1\u4ee5\u53ca\u5168\u5c40\u53d8\u91cf<\/h4>\n

    \u6211\u7528\u7684\u662fucosIII\u7684\u5b9e\u65f6\u64cd\u4f5c\u7cfb\u7edf，\u7528freertos\u4e5f\u5dee\u4e0d\u591a，\u628a\u8c03\u5ea6\u7684\u4ee3\u7801\u66ff\u6362\u4e00\u4e0b\u5c31\u884c\u4e86，\u7b2c\u4e94\u4e2a\u5927\u6807\u98982 3 4 5\u7684\u4ee3\u7801\u90fd\u662f\u5728 tcp_server_task \u8fd9\u4e2a\u4efb\u52a1\u51fd\u6570\u91cc\u9762\u7684，\u7136\u540e\u7b2c\u516d\u4e2a\u6807\u9898\u662f\u6bcf\u4e2a\u5ba2\u6237\u7aef\u7684\u56de\u8c03\u51fd\u6570，\u6574\u7406\u5728\u4e00\u8d77\u5c31\u662f\u5b8c\u6574\u7684\u4ee3\u7801\u3002<\/p>\n

    #include "sys.h"
    \n#include "lwip_comm.h"
    \n#include "includes.h"
    \n#include "lwip\/api.h"
    \n#include "lwip\/err.h"
    \n#include "lwip\/tcp.h"
    \n#include <stdio.h><\/p>\n

    #define TCP_SERVER_PORT 8088 \/\/ \u5b9a\u4e49TCP\u670d\u52a1\u5668\u76d1\u542c\u7684\u7aef\u53e3\u53f7，\u53ef\u6309\u9700\u4fee\u6539
    \n#define MAX_CONNECTIONS 2 \/\/ \u6700\u5927\u5141\u8bb8\u540c\u65f6\u8fde\u63a5\u7684\u5ba2\u6237\u7aef\u6570\u91cf
    \n#define RX_BUFFER_SIZE 1024 \/\/ \u63a5\u6536\u7f13\u51b2\u533a\u5927\u5c0f<\/p>\n

    \/\/ \u7528\u4e8e\u5b58\u50a8\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u7ed3\u6784\u4f53\u6570\u7ec4
    \nstruct tcp_pcb *tcp_server_pcbs[MAX_CONNECTIONS];<\/p>\n

    \/\/ \u7528\u4e8e\u4fdd\u62a4\u5bf9tcp_server_pcbs\u6570\u7ec4\u64cd\u4f5c\u7684\u4e92\u65a5\u4fe1\u53f7\u91cf
    \nOS_SEM tcp_server_pcbs_sem;<\/p>\n

    \/\/ \u5904\u7406\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u51fd\u6570
    \nerr_t client_connection_handler(void *arg, struct tcp_pcb *newpcb, err_t err);
    \n\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u63a5\u6536\u6570\u636e\u7684\u51fd\u6570
    \nerr_t client_recv_handler(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err);
    \n\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u53d1\u9001\u6570\u636e\u7684\u51fd\u6570（\u793a\u4f8b\u4e2d\u7b80\u5355\u56de\u663e\u6570\u636e\u7ed9\u5ba2\u6237\u7aef）
    \nerr_t client_send_handler(void *arg, struct tcp_pcb *tpcb, u16_t len);
    \n\/\/ \u5904\u7406\u5ba2\u6237\u7aef\u65ad\u5f00\u8fde\u63a5\u7684\u51fd\u6570
    \nvoid client_err_handler(void *arg, err_t err);
    \n\/\/ TCP\u670d\u52a1\u5668\u4efb\u52a1\u51fd\u6570
    \nvoid tcp_server_task(void *p_arg);<\/p>\n

    \/\/TCP\u5ba2\u6237\u7aef\u4efb\u52a1
    \n#define TCP_PRIO7
    \n\/\/\u4efb\u52a1\u5806\u6808\u5927\u5c0f
    \n#define TCP_STK_SIZE300
    \n\/\/\u4efb\u52a1\u63a7\u5236\u5757
    \nOS_TCBTcpTaskTCB;
    \n\/\/\u4efb\u52a1\u5806\u6808
    \nCPU_STK TCP_TASK_STK[TCP_STK_SIZE];<\/p>\n

    \/\/\u521b\u5efaTCP\u7ebf\u7a0b
    \n\/\/\u8fd4\u56de\u503c:0 TCP\u521b\u5efa\u6210\u529f
    \n\/\/\u5176\u4ed6 TCP\u521b\u5efa\u5931\u8d25
    \nu8 tcp_demo_init(void)
    \n{
    \nOS_ERR err;
    \nCPU_SR_ALLOC();<\/p>\n

    OS_CRITICAL_ENTER();\/\/\u8fdb\u5165\u4e34\u754c\u533a
    \n\/\/\u521b\u5efaTCP\u4efb\u52a1
    \nOSTaskCreate((OS_TCB * )&TcpTaskTCB,
    \n (CPU_CHAR* )"tcp task",
    \n (OS_TASK_PTR )tcp_server_task,
    \n (void* )0,
    \n (OS_PRIO )TCP_PRIO,
    \n (CPU_STK * )&TCP_TASK_STK[0],
    \n (CPU_STK_SIZE)TCP_STK_SIZE\/10,
    \n (CPU_STK_SIZE)TCP_STK_SIZE,
    \n (OS_MSG_QTY )0,
    \n (OS_TICK )0,
    \n (void * )0,
    \n (OS_OPT )OS_OPT_TASK_STK_CHK|OS_OPT_TASK_STK_CLR,
    \n (OS_ERR * )&err);
    \nOS_CRITICAL_EXIT();\/\/\u9000\u51fa\u4e34\u754c\u533a
    \nreturn err;
    \n} <\/p>\n

    2.\u521b\u5efa TCP \u63a7\u5236\u5757<\/h4>\n

    \u4f7f\u7528 LWIP \u7684 API \u51fd\u6570tcp_new()<\/span>\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 TCP \u63a7\u5236\u5757\u3002<\/p>\n

    struct tcp_pcb *server_pcb;
    \n err_t err;
    \nOS_ERR os_err;
    \n \/\/ \u521b\u5efa\u4e00\u4e2aTCP\u534f\u8bae\u63a7\u5236\u5757（PCB）\u7528\u4e8e\u670d\u52a1\u5668\u7aef
    \n server_pcb = tcp_new();
    \n if (server_pcb == NULL)
    \n {
    \n printf("Error creating TCP PCB\\\\n");
    \n return;
    \n } <\/p>\n

    3.\u7ed1\u5b9a\u7aef\u53e3\u00a0<\/h4>\n

    \u4f7f\u7528tcp_bind()<\/span>\u51fd\u6570\u5c06 TCP \u63a7\u5236\u5757\u7ed1\u5b9a\u5230\u4e00\u4e2a\u7279\u5b9a\u7684\u7aef\u53e3\u53f7\u3002\u901a\u5e38\u9009\u62e9\u4e00\u4e2a\u672a\u88ab\u5176\u4ed6\u5e94\u7528\u7a0b\u5e8f\u5360\u7528\u7684\u7aef\u53e3\u3002<\/p>\n

    \/\/ \u7ed1\u5b9a\u670d\u52a1\u5668\u7684IP\u5730\u5740\u548c\u7aef\u53e3\u53f7
    \n err = tcp_bind(server_pcb, IP_ADDR_ANY, TCP_SERVER_PORT);
    \n if (err!= ERR_OK)
    \n {
    \n printf("Error binding TCP socket: %d\\\\n", err);
    \n tcp_close(server_pcb);
    \n return;
    \n } <\/p>\n

    \u8fd9\u91cc\u7684SERVER_PORT<\/span>\u662f\u670d\u52a1\u5668\u76d1\u542c\u7684\u7aef\u53e3\u53f7\u3002<\/p>\n<\/p>\n

    4.\u00a0\u8fdb\u5165\u76d1\u542c\u72b6\u6001<\/h4>\n

    \u4f7f\u7528tcp_listen()<\/span>\u51fd\u6570\u4f7f TCP \u63a7\u5236\u5757\u8fdb\u5165\u76d1\u542c\u72b6\u6001，\u7b49\u5f85\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n

    \/\/ \u5c06\u670d\u52a1\u5668PCB\u8bbe\u7f6e\u4e3a\u76d1\u542c\u72b6\u6001，\u7b49\u5f85\u5ba2\u6237\u7aef\u8fde\u63a5
    \n server_pcb = tcp_listen(server_pcb);
    \n if (server_pcb == NULL)
    \n {
    \n printf("Error listening for connections\\\\n");
    \n tcp_close(server_pcb);
    \n return;
    \n } <\/p>\n

    5.\u8bbe\u7f6e\u63a5\u6536\u56de\u8c03\u51fd\u6570\u00a0<\/h4>\n

    \u4f7f\u7528tcp_accept()\u51fd\u6570\u8bbe\u7f6e\u4e00\u4e2a\u63a5\u6536\u56de\u8c03\u51fd\u6570，\u5f53\u6709\u5ba2\u6237\u7aef\u8fde\u63a5\u8bf7\u6c42\u65f6，\u8be5\u56de\u8c03\u51fd\u6570\u5c06\u88ab\u8c03\u7528\u3002<\/p>\n

    \/\/ \u8bbe\u7f6e\u63a5\u53d7\u5ba2\u6237\u7aef\u8fde\u63a5\u7684\u56de\u8c03\u51fd\u6570
    \n tcp_accept(server_pcb, client_connection_handler);<\/p>\n

    while (1)
    \n {
    \n \/\/ \u4efb\u52a1\u53ef\u4ee5\u5728\u8fd9\u91cc\u8fdb\u884c\u9002\u5f53\u7684\u963b\u585e\u7b49\u5f85，\u907f\u514d\u8fc7\u5ea6\u5360\u7528CPU\u8d44\u6e90
    \n OSTimeDlyHMSM(0,0,0,100,OS_OPT_TIME_HMSM_STRICT,&os_err); \/\/\u5ef6\u65f6100ms
    \n } <\/p>\n

    client_connection_handler\u662f\u81ea\u5b9a\u4e49\u7684\u56de\u8c03\u51fd\u6570，\u7528\u4e8e\u5904\u7406\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42\u3002<\/p>\n<\/p>\n

    \u516d\u3001\u5904\u7406\u591a\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5\u00a0<\/h2>\n

    1.\u5728\u63a5\u6536\u56de\u8c03\u51fd\u6570\u4e2d，\u63a5\u53d7\u5ba2\u6237\u7aef\u7684\u8fde\u63a5\u8bf7\u6c42，\u5e76\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u521b\u5efa\u4e00\u4e2a\u65b0\u7684 TCP \u63a7\u5236\u5757\u6765\u5904\u7406\u4e0e\u8be5\u5ba2\u6237\u7aef\u7684\u901a\u4fe1,\u7531\u4e8e\u5355\u7247\u673a\u8d44\u6e90\u6709\u9650\u548c\u9700\u6c42，\u6211\u8bbe\u7f6e\u7684\u6700\u591a\u88ab\u4e24\u4e2a\u5ba2\u6237\u7aef\u8fde\u63a5，\u518d\u6765\u4e86\u65b0\u7684\u5ba2\u6237\u7aef\u8fde\u63a5\u4f1a\u628a\u4e4b\u524d\u6700\u65e7\u7684\u5173\u95ed，\u8fd9\u4e5f\u662f\u4e3a\u4e86\u7f51\u7ebf\u62d4\u6389\u6216\u8005\u4e0d\u4e3b\u52a8\u5173\u95ed\u7684\u65e0\u6548\u8fde\u63a5\u5360\u7528\u8d44\u6e90<\/span>\u3002<\/p>\n

    err_t client_connection_handler(void *arg, struct tcp_pcb *newpcb, err_t err)
    \n{
    \n OS_ERR os_err;
    \n int client_index;<\/p>\n

    if (err!= ERR_OK)
    \n {
    \n return err;
    \n }<\/p>\n

    \/\/ \u83b7\u53d6\u4e92\u65a5\u4fe1\u53f7\u91cf，\u4fdd\u62a4\u5bf9tcp_server_pcbs\u6570\u7ec4\u7684\u8bbf\u95ee
    \nOSSemPend(&tcp_server_pcbs_sem,0,OS_OPT_PEND_BLOCKING,0,&os_err); \/\/\u8bf7\u6c42\u4fe1\u53f7\u91cf
    \nif(tcp_server_pcbs[close_tcp]!=NULL){
    \ntcp_close(tcp_server_pcbs[close_tcp]);
    \n}
    \ntcp_server_pcbs[close_tcp]=newpcb;
    \nif(close_tcp==0){
    \nclose_tcp=1;
    \n}else{
    \nclose_tcp=0;
    \n}<\/p>\n

    \/\/ \u8bbe\u7f6e\u63a5\u6536\u3001\u53d1\u9001\u548c\u9519\u8bef\u5904\u7406\u7684\u56de\u8c03\u51fd\u6570
    \n tcp_recv(newpcb, client_recv_handler);
    \n tcp_sent(newpcb, client_send_handler);
    \n tcp_err(newpcb, client_err_handler);<\/p>\n

    OSSemPost(&tcp_server_pcbs_sem, OS_OPT_POST_1, &os_err);
    \n return ERR_OK;
    \n} <\/p>\n

    2.\u4e3a\u6bcf\u4e2a\u8fde\u63a5\u8bbe\u7f6e\u63a5\u6536\u56de\u8c03\u51fd\u6570，\u4ee5\u4fbf\u5728\u6709\u6570\u636e\u5230\u8fbe\u65f6\u8fdb\u884c\u5904\u7406，\u5982\u679ctcp\u5ba2\u6237\u7aef\u4e3b\u52a8\u65ad\u5f00\u8fde\u63a5\u4f1a\u8d70 else if (err == ERR_OK && p == NULL)\u00a0 \u8fd9\u91cc\u3002<\/p>\n

    err_t client_recv_handler(void *arg, struct tcp_pcb *tpcb, struct pbuf *p, err_t err)
    \n{
    \n OS_ERR os_err;<\/p>\n

    if (err == ERR_OK && p!= NULL)
    \n {
    \n \/\/ \u5c06\u63a5\u6536\u5230\u7684pbuf\u6570\u636e\u590d\u5236\u5230\u672c\u5730\u7f13\u51b2\u533a（\u8fd9\u91cc\u7b80\u5355\u793a\u4f8b，\u53ef\u4f18\u5316）
    \n char rx_buffer[RX_BUFFER_SIZE];
    \n int copied_bytes = 0;
    \n struct pbuf *q = p;
    \n while (q!= NULL)
    \n {
    \n int bytes_to_copy = (q->len < (RX_BUFFER_SIZE – copied_bytes))? q->len : (RX_BUFFER_SIZE – copied_bytes);
    \n memcpy(&rx_buffer[copied_bytes], q->payload, bytes_to_copy);
    \n copied_bytes += bytes_to_copy;
    \n q = q->next;
    \n }<\/p>\n

    \/\/ \u8fd9\u91cc\u53ef\u4ee5\u5bf9\u63a5\u6536\u5230\u7684\u6570\u636e\u8fdb\u884c\u5904\u7406，\u6bd4\u5982\u6839\u636e\u534f\u8bae\u89e3\u6790\u7b49，\u73b0\u5728\u7b80\u5355\u56de\u663e\u6570\u636e\u7ed9\u5ba2\u6237\u7aef
    \n tcp_write(tpcb, rx_buffer, copied_bytes, TCP_WRITE_FLAG_COPY);
    \n tcp_output(tpcb);<\/p>\n

    \/\/ \u91ca\u653e\u63a5\u6536\u5230\u7684pbuf\u5185\u5b58
    \n pbuf_free(p);
    \n }
    \n else if (err == ERR_OK && p == NULL)
    \n {
    \nOSSemPend(&tcp_server_pcbs_sem,0,OS_OPT_PEND_BLOCKING,0,&os_err); \/\/\u8bf7\u6c42\u4fe1\u53f7\u91cf
    \n \/\/ \u5ba2\u6237\u7aef\u5173\u95ed\u4e86\u8fde\u63a5，\u6b63\u5e38\u5904\u7406
    \nfor (int i = 0; i < MAX_CONNECTIONS; i++)
    \n{
    \nif (tcp_server_pcbs[i] == tpcb)
    \n{
    \ntcp_server_pcbs[i] = NULL;
    \nbreak;
    \n}
    \n}
    \n OSSemPost(&tcp_server_pcbs_sem, OS_OPT_POST_1, &os_err);
    \n tcp_close(tpcb);<\/p>\n

    }
    \n else
    \n {
    \n \/\/ \u51fa\u73b0\u9519\u8bef\u60c5\u51b5，\u5173\u95ed\u8fde\u63a5
    \n tcp_close(tpcb);
    \n }<\/p>\n

    return ERR_OK;
    \n} <\/p>\n

    3. \u53d1\u9001\u51fd\u6570，\u8fd9\u4e2a\u6211\u6ca1\u7528\u5230，\u6211\u53ea\u662f\u88ab\u52a8\u8fd4\u56de\u6d88\u606f\u3002<\/p>\n

    err_t client_send_handler(void *arg, struct tcp_pcb *tpcb, u16_t len)
    \n{
    \n \/\/ \u8fd9\u91cc\u53ef\u4ee5\u6839\u636e\u5b9e\u9645\u53d1\u9001\u60c5\u51b5\u505a\u4e00\u4e9b\u540e\u7eed\u5904\u7406，\u5f53\u524d\u793a\u4f8b\u53ea\u662f\u7b80\u5355\u56de\u663e，\u65e0\u9700\u989d\u5916\u64cd\u4f5c
    \n return ERR_OK;
    \n} <\/p>\n

    4.\u9519\u8bef\u5904\u7406，\u5982\u679c\u6709\u8d85\u65f6\u7684\u90a3\u79cdtcp\u8fde\u63a5，\u5e94\u8be5\u662f\u4f1a\u8d70\u8fd9\u91cc\u91ca\u653eTCP\u8fde\u63a5\u3002<\/p>\n

    void client_err_handler(void *arg, err_t err)
    \n{
    \n struct tcp_pcb *tpcb = (struct tcp_pcb *)arg;
    \n OS_ERR os_err;<\/p>\n

    \/\/ \u83b7\u53d6\u4e92\u65a5\u4fe1\u53f7\u91cf，\u4fdd\u62a4\u5bf9tcp_server_pcbs\u6570\u7ec4\u7684\u8bbf\u95ee
    \n OSSemPend(&tcp_server_pcbs_sem,0,OS_OPT_PEND_BLOCKING,0,&os_err); \/\/\u8bf7\u6c42\u4fe1\u53f7\u91cf<\/p>\n

    for (int i = 0; i < MAX_CONNECTIONS; i++)
    \n {
    \n if (tcp_server_pcbs[i] == tpcb)
    \n {
    \n tcp_server_pcbs[i] = NULL;
    \n break;
    \n }
    \n }<\/p>\n

    OSSemPost(&tcp_server_pcbs_sem, OS_OPT_POST_1, &os_err);
    \n tcp_close(tpcb);
    \n} <\/p>\n<\/p>\n

    \u4e03\u3001\u603b\u7ed3\u00a0<\/h2>\n

    \u901a\u8fc7\u4ee5\u4e0a\u6b65\u9aa4，\u6211\u4eec\u53ef\u4ee5\u5728 STM32 \u4e0a\u5b9e\u73b0\u4e00\u4e2a TCP \u670d\u52a1\u5668，\u4e0e\u591a\u4e2a\u8bbe\u5907\u8fdb\u884c\u901a\u4fe1\u3002\u5728\u5b9e\u9645\u5e94\u7528\u4e2d，\u53ef\u4ee5\u6839\u636e\u5177\u4f53\u7684\u9700\u6c42\u8fdb\u884c\u8fdb\u4e00\u6b65\u7684\u4f18\u5316\u548c\u6269\u5c55，\u4f8b\u5982\u6dfb\u52a0\u5b89\u5168\u8ba4\u8bc1\u3001\u6570\u636e\u52a0\u5bc6\u3001\u6d41\u91cf\u63a7\u5236\u7b49\u529f\u80fd\u3002\u540c\u65f6，\u8fd8\u9700\u8981\u6ce8\u610f\u7f51\u7edc\u7a33\u5b9a\u6027\u548c\u53ef\u9760\u6027，\u4ee5\u786e\u4fdd\u901a\u4fe1\u7684\u6b63\u5e38\u8fdb\u884c\u3002<\/p>\n<\/p>\n

    \u5e0c\u671b\u672c\u6587\u5bf9\u5927\u5bb6\u5728 STM32 \u4e0a\u5b9e\u73b0 TCP \u670d\u52a1\u5668\u4e0e\u591a\u4e2a\u8bbe\u5907\u901a\u4fe1\u6709\u6240\u5e2e\u52a9\u3002\u5982\u679c\u6709\u4efb\u4f55\u95ee\u9898\u6216\u5efa\u8bae，\u6b22\u8fce\u5728\u8bc4\u8bba\u533a\u7559\u8a00\u4ea4\u6d41\u3002<\/p>\n

    <\/h2>\n<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"

    \u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb3.1k\u6b21\uff0c\u70b9\u8d5e23\u6b21\uff0c\u6536\u85cf40\u6b21\u3002\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u4e2d\uff0c\u5e38\u5e38\u9700\u8981\u5b9e\u73b0\u8bbe\u5907\u4e4b\u95f4\u7684\u7f51\u7edc\u901a\u4fe1\u3002STM32 \u4f5c\u4e3a\u4e00\u6b3e\u5e7f\u6cdb\u5e94\u7528\u7684\u5fae\u63a7\u5236\u5668\uff0c\u7ed3\u5408\u7f51\u7edc\u901a\u4fe1\u529f\u80fd\u53ef\u4ee5\u5b9e\u73b0\u4e0e\u591a\u4e2a\u8bbe\u5907\u7684\u4ea4\u4e92\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 STM32 \u4e0a\u5b9e\u73b0 TCP \u670d\u52a1\u5668\u7aef\uff0c\u4ee5\u4fbf\u4e0e\u591a\u4e2a\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002lwipopts.h\u3002_stm32 tcp<\/p>\n","protected":false},"author":2,"featured_media":25597,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[217,205,270,43,220,78],"topic":[],"class_list":["post-25598","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-server","tag-stm32","tag-tcp-ip","tag-270","tag-43","tag-220","tag-78"],"yoast_head":"\nSTM32 \u5b9e\u73b0 TCP \u670d\u52a1\u5668\u4e0e\u591a\u4e2a\u8bbe\u5907\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.wsisp.com\/helps\/25598.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"STM32 \u5b9e\u73b0 TCP \u670d\u52a1\u5668\u4e0e\u591a\u4e2a\u8bbe\u5907\u901a\u4fe1 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u6587\u7ae0\u6d4f\u89c8\u9605\u8bfb3.1k\u6b21\uff0c\u70b9\u8d5e23\u6b21\uff0c\u6536\u85cf40\u6b21\u3002\u5728\u5d4c\u5165\u5f0f\u7cfb\u7edf\u5f00\u53d1\u4e2d\uff0c\u5e38\u5e38\u9700\u8981\u5b9e\u73b0\u8bbe\u5907\u4e4b\u95f4\u7684\u7f51\u7edc\u901a\u4fe1\u3002STM32 \u4f5c\u4e3a\u4e00\u6b3e\u5e7f\u6cdb\u5e94\u7528\u7684\u5fae\u63a7\u5236\u5668\uff0c\u7ed3\u5408\u7f51\u7edc\u901a\u4fe1\u529f\u80fd\u53ef\u4ee5\u5b9e\u73b0\u4e0e\u591a\u4e2a\u8bbe\u5907\u7684\u4ea4\u4e92\u3002\u672c\u6587\u5c06\u4ecb\u7ecd\u5982\u4f55\u5728 STM32 \u4e0a\u5b9e\u73b0 TCP \u670d\u52a1\u5668\u7aef\uff0c\u4ee5\u4fbf\u4e0e\u591a\u4e2a\u8bbe\u5907\u8fdb\u884c\u901a\u8baf\u3002lwipopts.h\u3002_stm32 tcp\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/25598.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2025-04-19T05:16:25+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2025\/04\/20250419051624-680331a815670.png\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"4 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/25598.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/25598.html\",\"name\":\"STM32 \u5b9e\u73b0 TCP \u670d\u52a1\u5668\u4e0e\u591a\u4e2a\u8bbe\u5907\u901a\u4fe1 - 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