{"id":22614,"date":"2025-04-19T06:12:57","date_gmt":"2025-04-18T22:12:57","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/22614.html"},"modified":"2025-04-19T06:12:57","modified_gmt":"2025-04-18T22:12:57","slug":"stm32h7%e9%80%9a%e8%bf%87cubemx%e5%88%9d%e5%a7%8b%e5%8c%96%e7%a7%bb%e6%a4%8dlwip%ef%bc%8cdhcp%e5%bb%ba%e7%ab%8braw-tcp%e6%9c%8d%e5%8a%a1%e5%99%a8%ef%bc%8c%e4%b8%8d%e5%81%9c%e5%8f%91%e6%88%90%e5%8a%9f","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/22614.html","title":{"rendered":"STM32H7\u901a\u8fc7CUBEMX\u521d\u59cb\u5316\u79fb\u690dLWIP\uff0cDHCP\u5efa\u7acbRAW TCP\u670d\u52a1\u5668\uff0c\u4e0d\u505c\u53d1\u6210\u529f"},"content":{"rendered":"

<\/h2>\n

\u5728H743\u548cH723\u6d4b\u8bd5\u6210\u529f\u3002<\/span><\/p>\n

1\u3001\u9488\u5bf9H743\u7684MPU\u914d\u7f6e<\/span><\/h2>\n

MPU_InitStruct.Enable = MPU_REGION_ENABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30040000;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_256B;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.SubRegionDisable = 0x0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;\/\/\u00a0 MPU_ACCESS_SHAREABLE<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;<\/span><\/p>\n

\n

\u00a0\u00a0\u00a0 HAL_MPU_ConfigRegion(&MPU_InitStruct);<\/span><\/p>\n

\n

\u00a0\u00a0\u00a0 \/** Initializes and configures the Region and the memory to be protected<\/span><\/p>\n

\u00a0\u00a0\u00a0 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER1;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30044000;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;<\/span><\/p>\n

\n

\n\n\n\n\n\n\n\n\n\n\n
\n

TX Descriptor\u00a0\u00a0 length 4<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

First TX Descriptor address 0x3004 0080<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\n<\/td>\n<\/tr>\n

\n

RX Descriptor length 4<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

First RX Descriptor address 0x3004 0000<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\n<\/td>\n<\/tr>\n

\n

Rx\u00a0\u00a0 Buffers Address 0x3004 0100<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

Rx Buffers length 1536<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n\n\n\n\n
\n

LWIP RAM HEAP\u00a0\u00a0 POINTER (RAM Heap Pointer) 0x3004 4000<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

MEM SIZE (Heap Memory Size) 14336 Byte(s)<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

#define TCP_MSS 1460<\/span><\/p>\n

\n

\n

2\u3001\u9488\u5bf9H723\u7684\u521d\u59cb\u5316\u914d\u7f6e<\/span><\/h2>\n

MPU_InitStruct.Enable = MPU_REGION_ENABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER1;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30000000;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_256B;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.SubRegionDisable = 0x0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsShareable = MPU_ACCESS_SHAREABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;<\/span><\/p>\n

\/\/MPU_ACCESS_NOT_BUFFERABLE<\/span><\/p>\n

\n

\u00a0\u00a0\u00a0 HAL_MPU_ConfigRegion(&MPU_InitStruct);<\/span><\/p>\n

\n

\u00a0\u00a0\u00a0 \/** Initializes and configures the Region and the memory to be protected<\/span><\/p>\n

\u00a0\u00a0\u00a0 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER0;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30004000;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsCacheable = MPU_ACCESS_CACHEABLE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;<\/span><\/p>\n

\n

\u00a0\u00a0\u00a0 HAL_MPU_ConfigRegion(&MPU_InitStruct);<\/span><\/p>\n

\u00a0\u00a0\u00a0 \/* Enables the MPU *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);<\/span><\/p>\n

\n

\n\n\n\n\n\n\n\n\n\n\n
\n

TX Descriptor\u00a0\u00a0 length 4<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

First TX Descriptor address 0x3000 0080<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\n<\/td>\n<\/tr>\n

\n

RX Descriptor length 4<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

First RX Descriptor address 0x3000 0000<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

\n<\/td>\n<\/tr>\n

\n

Rx\u00a0\u00a0 Buffers Address 0x3000 0100<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

Rx Buffers length 1536<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n\n\n\n\n
\n

LWIP RAM HEAP\u00a0\u00a0 POINTER (RAM Heap Pointer) 0x3000 4000<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n

\n

MEM SIZE (Heap Memory Size) 14336 Byte(s)<\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\n

#define TCP_MSS 1460<\/span><\/p>\n

3\u3001\u5b9e\u73b0\u8fc7\u7a0b<\/span><\/h2>\n

\u4e2d\u95f4\u8d70\u4e86\u5f88\u591a\u5f2f\u8def，\u786e\u5b9e\u4e0d\u5bb9\u6613，\u770b\u4e86\u6b63\u70b9\u539f\u5b50\u7684\u601d\u8def\u7ed9\u4e86\u542f\u53d1\u3002<\/span><\/p>\n

\u529f\u80fd\u5b9e\u73b0\u6b65\u9aa4：\u5148\u521d\u59cb\u5316\u5185\u6838，\u67e5\u770b\u7f51\u7ebf\u8fde\u63a5\u72b6\u6001，\u63a5\u7740DHCP\u83b7\u53d6IP\u5730\u5740,\u63a5\u7740\u5efa\u7acbpcb，\u7ed1\u5b9a，\u76d1\u542c\u3002\u5bf9\u5ba2\u6237\u7aef（\u5373\u4e0a\u4f4d\u673a）\u53d1\u9001\u6570\u636e\u3002<\/span><\/p>\n

\n

3.1\u6b63\u70b9\u539f\u5b50\u7684\u4ee3\u7801\u903b\u8f91<\/span><\/h3>\n

lwip_comm_init()\/\/lwIP\u521d\u59cb\u5316(lwIP\u542f\u52a8\u7684\u65f6\u5019\u4f7f\u7528)<\/span><\/p>\n

\u5305\u542b\u4ee5\u4e0b\u51fd\u6570：<\/span><\/p>\n

{<\/span><\/p>\n

ethernet_init(); \u00a0\/* \u521d\u59cb\u5316\u4ee5\u592a\u7f51IO *\/<\/span><\/p>\n

lwip_init();\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u521d\u59cb\u5316LWIP\u5185\u6838 *\/<\/span><\/p>\n

\u00a0 netif_set_default(&g_lwip_netif);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u8bbe\u7f6enetif\u4e3a\u9ed8\u8ba4\u7f51\u53e3 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 lwip_link_status_updated(&g_lwip_netif);\u00a0\u00a0\u00a0 \/* DHCP\u94fe\u63a5\u72b6\u6001\u66f4\u65b0\u51fd\u6570 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 netif_set_link_callback(&g_lwip_netif, lwip_link_status_updated); \/\/DHCP\u94fe\u63a5\u72b6\u6001\u66f4\u65b0\u7684\u56de\u8c03\u51fd\u6570<\/span><\/p>\n

\n

\n

#if LWIP_DHCP\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5982\u679c\u4f7f\u7528DHCP\u7684\u8bdd *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 g_lwipdev.dhcpstatus = 0;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* DHCP\u72b6\u6001\u6807\u8bb0\u4e3a0 *\/<\/span><\/p>\n

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

dhcp_supplied_address(netif)) \/\/\u83b7\u53d6IP\u5730\u5740\u540e，<\/span><\/p>\n

g_lwipdev.dhcpstatus = 2;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* DHCP\u72b6\u6001\u6807\u8bb0\u4e3a2 *\/<\/span><\/p>\n

\n

\u5f00\u59cb\u5faa\u73af\u8c03\u7528，\u53ea\u8981DHCP\u662f\u8fde\u63a5\u4e0a\u7684\u72b6\u6001<\/span><\/p>\n

while{<\/span><\/p>\n

lwip_pkt_handle();\u5305\u542b\u4e00\u4e2a\u51fd\u6570 ethernetif_input(&g_lwip_netif);<\/span><\/p>\n

\/* \u4ece\u7f51\u7edc\u7f13\u51b2\u533a\u4e2d\u8bfb\u53d6\u63a5\u6536\u5230\u7684\u6570\u636e\u5305\u5e76\u5c06\u5176\u53d1\u9001\u7ed9LWIP\u5904\u7406 *\/<\/span><\/p>\n

\u00a0\u00a0 Ethernet_Link_Periodic_Handle()\u5305\u542b\u4e00\u4e2a\u51fd\u6570<\/span><\/p>\n

\u00a0sys_check_timeouts();<\/span><\/p>\n

\u5468\u671f\u6027\u68c0\u6d4b\u7f51\u7ebf\u8fde\u63a5\u72b6\u6001<\/span><\/p>\n

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

\n

\u63a5\u7740lwip_demo(void)<\/span><\/p>\n

\u5305\u542b\u4e0b\u9762\u51fd\u6570<\/span><\/p>\n

\u00a0struct tcp_pcb *tcppcbnew;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5b9a\u4e49\u4e00\u4e2aTCP\u670d\u52a1\u5668\u63a7\u5236\u5757 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 struct tcp_pcb *tcppcbconn;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5b9a\u4e49\u4e00\u4e2aTCP\u670d\u52a1\u5668\u63a7\u5236\u5757 *\/<\/span><\/p>\n

\u00a0\u00a0 tcppcbnew = tcp_new();\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u521b\u5efa\u4e00\u4e2a\u65b0\u7684pcb *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 if (tcppcbnew)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u521b\u5efa\u6210\u529f *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0 {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 err = tcp_bind(tcppcbnew, IP_ADDR_ANY, LWIP_DEMO_PORT); \/* \u5c06\u672c\u5730IP\u4e0e\u6307\u5b9a\u7684\u7aef\u53e3\u53f7\u7ed1\u5b9a\u5728\u4e00\u8d77,IP_ADDR_ANY\u4e3a\u7ed1\u5b9a\u672c\u5730\u6240\u6709\u7684IP\u5730\u5740 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if (err == ERR_OK)\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u7ed1\u5b9a\u5b8c\u6210 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcppcbconn = tcp_listen(tcppcbnew);\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u8bbe\u7f6etcppcb\u8fdb\u5165\u76d1\u542c\u72b6\u6001 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_accept(tcppcbconn, lwip_tcp_server_accept);\u00a0\u00a0\u00a0\u00a0 \/* \u521d\u59cb\u5316LWIP\u7684tcp_accept\u7684\u56de\u8c03\u51fd\u6570 *\/<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else res = 1;<\/span><\/p>\n

\u00a0\u00a0\u00a0 }<\/span><\/p>\n

\u00a0\u00a0\u00a0 else res = 1;<\/span><\/p>\n

\u00a0\u00a0\u00a0 g_point_color = BLUE;<\/span><\/p>\n

\u00a0\u00a0\u00a0 while (res == 0)<\/span><\/p>\n

\u00a0<\/span><\/p>\n

3.2\u5bf9\u6bd4\u4e0bstm32cubemx\u751f\u6210\u7684\u4ee3\u7801\u3002<\/span><\/h3>\n

MX_LWIP_Init(void)<\/span><\/p>\n

{<\/span><\/p>\n

\u00a0\u00a0 lwip_init();\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/lwip\u5185\u6838\u521d\u59cb\u5316<\/span><\/p>\n

\u00a0 ipaddr.addr = 0;<\/span><\/p>\n

\u00a0 netmask.addr = 0;<\/span><\/p>\n

\u00a0 gw.addr = 0;<\/span><\/p>\n

\u00a0 netif_add(&gnetif, &ipaddr, &netmask, &gw, NULL, &ethernetif_init, &ethernet_input);\/\/\u6dfb\u52a0\u7f51\u5361<\/span><\/p>\n

\u00a0 netif_set_default(&gnetif); \/\/\u8bbe\u7f6e\u9ed8\u8ba4\u7f51\u5361<\/span><\/p>\n

\u00a0 netif_set_up(&gnetif);\/\/\u542f\u52a8\u4e00\u4e2a\u7f51\u7edc\u63a5\u53e3，\u5e76\u4f7f\u5176\u53ef\u4ee5\u5904\u7406\u7f51\u7edc\u6570\u636e\u5305\u3002<\/span><\/span><\/span><\/p>\n

\u00a0 netif_set_link_callback(&gnetif, ethernet_link_status_updated);\/\/\u7f51\u5361\u8fde\u63a5\u56de\u8c03\u51fd\u6570<\/span><\/p>\n

\u00a0 dhcp_start(&gnetif);<\/span><\/p>\n

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

\u8fd9\u91cc\u6211\u53d1\u73b0\u56de\u8c03\u51fd\u6570\u66f4\u65b0IP\u5730\u5740\u5f88\u6162，\u6240\u4ee5\u6dfb\u52a0\u4e00\u4e2awhile\u5faa\u73af\u3002\u7528\u6765\u5224\u5b9aIP\u5730\u5740\u66f4\u65b0<\/span><\/p>\n

\u00a0\u00a0 {<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/ethernetif_input(&gnetif);<\/span><\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/\/sys_check_timeouts();<\/span><\/p>\n

MX_LWIP_Process();<\/span><\/p>\n

\u00a0\u00a0\u00a0 }<\/span><\/p>\n

\u6700\u540e\u770b\u4e0b，MX_LWIP_Process\u5305\u542b<\/span><\/p>\n

void MX_LWIP_Process(void)<\/span><\/p>\n

{<\/span><\/p>\n

\u00a0 ethernetif_input(&gnetif);\u00a0 \/\/\u63a5\u6536\u6570\u636e<\/span><\/p>\n

\u00a0 \/* Handle timeouts *\/<\/span><\/p>\n

\u00a0 sys_check_timeouts();\/\/time\u8868\u793a\u5f53\u524d\u5b9a\u65f6\u4e8b\u4ef6\u6210\u4e3a\u94fe\u8868\u7b2c\u4e00\u4e2a\u8282\u70b9\u540e，\u5b83\u8fd8\u9700\u8981\u7b49\u5f85\u591a\u4e45（\u6beb\u79d2）\u624d\u4f1a\u88ab\u6267\u884c<\/span><\/p>\n

\u00a0 Ethernet_Link_Periodic_Handle(&gnetif);\/\/\u5468\u671f\u6027\u68c0\u67e5\u7f51\u7ebf\u8fde\u63a5\u72b6\u6001<\/span><\/p>\n

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

4\u3001\u5b8c\u6574\u4ee3\u7801<\/span><\/h2>\n

main.c<\/p>\n

\/* USER CODE BEGIN Header *\/<\/p>\n

\/**<\/p>\n

\u00a0 ******************************************************************************<\/p>\n

\u00a0 * @file\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : main.c<\/p>\n

\u00a0 * @brief\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 : Main program body<\/p>\n

\u00a0 ******************************************************************************<\/p>\n

\u00a0 * @attention<\/p>\n

\u00a0 *<\/p>\n

\u00a0 * Copyright (c) 2025 STMicroelectronics.<\/p>\n

\u00a0 * All rights reserved.<\/p>\n

\u00a0 *<\/p>\n

\u00a0 * This software is licensed under terms that can be found in the LICENSE file<\/p>\n

\u00a0 * in the root directory of this software component.<\/p>\n

\u00a0 * If no LICENSE file comes with this software, it is provided AS-IS.<\/p>\n

\u00a0 *<\/p>\n

\u00a0 ******************************************************************************<\/p>\n

\u00a0 *\/<\/p>\n

\/* USER CODE END Header *\/<\/p>\n

\/* Includes ——————————————————————*\/<\/p>\n

#include "main.h"<\/p>\n

#include "lwip.h"<\/p>\n

#include "memorymap.h"<\/p>\n

#include "usart.h"<\/p>\n

#include "gpio.h"<\/p>\n

\/* Private includes ———————————————————-*\/<\/p>\n

\/* USER CODE BEGIN Includes *\/<\/p>\n

#include "stdio.h"<\/p>\n

#include "lwip\/tcp.h"<\/p>\n

#include "string.h"<\/p>\n

\/* USER CODE END Includes *\/<\/p>\n

\/* Private typedef ———————————————————–*\/<\/p>\n

\/* USER CODE BEGIN PTD *\/<\/p>\n

uint32_t num;<\/p>\n

uint8_t newipaddress[4];<\/p>\n

err_t status_server, status_new;<\/p>\n

\/* USER CODE END PV *\/<\/p>\n

char rxbuff[2048];<\/p>\n

uint32_t address = 0;<\/p>\n

uint32_t rx_flag = 0;<\/p>\n

uint32_t count = 0;<\/p>\n

char sendbuffer[] = "20250106hel20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/p>\n

\/\/char sendbuffer[] = "20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/p>\n

\/\/char sendbuffer[] = "20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/p>\n

\/\/char sendbuffer[] = "20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/p>\n

\/* Private macro ————————————————————-*\/<\/p>\n

\/* USER CODE BEGIN PM *\/<\/p>\n

extern struct netif gnetif;<\/p>\n

struct tcp_pcb *tcp_server_pcb;\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5b9a\u4e49\u4e00\u4e2aTCP\u670d\u52a1\u5668\u63a7\u5236\u5757 *\/<\/p>\n

struct tcp_pcb *tcppcbnew;\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5b9a\u4e49\u4e00\u4e2aTCP\u670d\u52a1\u5668\u63a7\u5236\u5757 *\/<\/p>\n

\/* Private function prototypes ———————————————–*\/<\/p>\n

void SystemClock_Config(void);<\/p>\n

static void MPU_Config(void);<\/p>\n

int new_flag = 1;<\/p>\n

\/* USER CODE BEGIN PFP *\/<\/p>\n

\/* USER CODE END PFP *\/<\/p>\n

\/* Private user code ———————————————————*\/<\/p>\n

\/* USER CODE BEGIN 0 *\/<\/p>\n

int fputc(int c, FILE *stream)\u00a0\u00a0\u00a0 \/\/\u91cd\u5199fputc\u51fd\u6570<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 \/*<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 huart1\u662f\u5de5\u5177\u751f\u6210\u4ee3\u7801\u5b9a\u4e49\u7684UART1\u7ed3\u6784\u4f53，<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u5982\u679c\u4ee5\u540e\u8981\u4f7f\u7528\u5176\u4ed6\u4e32\u53e3\u6253\u5370，\u53ea\u9700\u8981\u628a\u8fd9\u4e2a\u7ed3\u6784\u4f53\u6539\u6210\u5176\u4ed6UART\u7ed3\u6784\u4f53\u3002<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_UART_Transmit(&huart1, (unsigned char *)&c, 1, 1000);<\/p>\n

\u00a0\u00a0\u00a0 return 1;<\/p>\n

}<\/p>\n

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

static err_t TCPServerCallback(void *arg, struct tcp_pcb *pcb, struct pbuf *tcp_recv_pbuf, err_t err)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 struct pbuf *tcp_send_pbuf;<\/p>\n

\/\/\u00a0\u00a0\u00a0 char echoString[]="This is the client content echo:\\\\r\\\\n";<\/p>\n

\u00a0\u00a0\u00a0 char echoString[] = "9999\\\\r\\\\n";<\/p>\n

\u00a0\u00a0\u00a0 rx_flag = 1;<\/p>\n

\u00a0\u00a0\u00a0 if (tcp_recv_pbuf != NULL)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u66f4\u65b0\u63a5\u6536\u7a97\u53e3 *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_recved(pcb, tcp_recv_pbuf->tot_len);<\/p>\n

\/\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0 \/* \u5c06\u63a5\u6536\u7684\u6570\u636e\u62f7\u8d1d\u7ed9\u53d1\u9001\u7ed3\u6784\u4f53 *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_send_pbuf = tcp_recv_pbuf;<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 address=&rxbuff;<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 memcpy(rxbuff, tcp_recv_pbuf->payload, 100);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status = tcp_write(pcb, echoString, strlen(echoString), 1);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 count = tcp_sndbuf(pcb); \/\/\u67e5\u8be2\u5269\u4f59buf\u5927\u5c0f<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("before payload buffer is %d\\\\r\\\\n", count);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("before payload status is\u00a0 %d\\\\r\\\\n", status);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf(" payload length\u00a0 is\u00a0 %d\\\\r\\\\n", tcp_send_pbuf->len);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u5c06\u63a5\u6536\u5230\u7684\u6570\u636e\u518d\u8f6c\u53d1\u51fa\u53bb *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status_server = tcp_write(pcb, tcp_send_pbuf->payload, tcp_send_pbuf->len, 1);<\/p>\n

\/\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 count = tcp_sndbuf(pcb); \/\/\u67e5\u8be2\u5269\u4f59buf\u5927\u5c0f<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("after payload buffer is\u00a0 %d\\\\r\\\\n", status);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 rx_flag = 1;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("after payload buffer is %d\\\\r\\\\n", count);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 pbuf_free(tcp_recv_pbuf);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_close(pcb);<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\/\/\u00a0\u00a0 else if (err == ERR_OK)<\/p>\n

\/\/\u00a0\u00a0 {<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0 return tcp_close(pcb);<\/p>\n

\/\/\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 return ERR_OK;<\/p>\n

}<\/p>\n

static err_t TCPServerAccept(void *arg, struct tcp_pcb *pcb, err_t err)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 \/* \u786e\u8ba4\u76d1\u542c\u4e0e\u8fde\u63a5 *\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0 tcp_arg(pcb, mem_calloc(sizeof(struct name), 1));<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u53d1\u9001\u4e00\u4e2a\u5efa\u7acb\u8fde\u63a5\u7684\u5b57\u7b26\u4e32 *\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_write(pcb, "hello my dream \\\\n\\\\r",strlen("hello my dream \\\\n\\\\r\u00a0 ")-2,1);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u914d\u7f6e\u63a5\u6536\u56de\u8c03\u51fd\u6570 *\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_recv(pcb, tcp_server_recv);<\/p>\n

\u00a0\u00a0\u00a0 tcp_recv(pcb, TCPServerCallback);<\/p>\n

\u00a0\u00a0\u00a0 return ERR_OK;<\/p>\n

}<\/p>\n

\/* Private define ————————————————————*\/<\/p>\n

\/* USER CODE BEGIN PD *\/<\/p>\n

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

\/* Private macro ————————————————————-*\/<\/p>\n

\/* USER CODE BEGIN PM *\/<\/p>\n

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

\/* Private variables ———————————————————*\/<\/p>\n

\/* USER CODE BEGIN PV *\/<\/p>\n

\/* USER CODE END PV *\/<\/p>\n

\/* Private function prototypes ———————————————–*\/<\/p>\n

void SystemClock_Config(void);<\/p>\n

static void MPU_Config(void);<\/p>\n

\/* USER CODE BEGIN PFP *\/<\/p>\n

\/* USER CODE END PFP *\/<\/p>\n

\/* Private user code ———————————————————*\/<\/p>\n

\/* USER CODE BEGIN 0 *\/<\/p>\n

\/* USER CODE END 0 *\/<\/p>\n

\/**<\/p>\n

\u00a0 * @brief\u00a0 The application entry point.<\/p>\n

\u00a0 * @retval int<\/p>\n

\u00a0 *\/<\/p>\n

int main(void)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN 1 *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END 1 *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* MPU Configuration——————————————————–*\/<\/p>\n

\u00a0\u00a0\u00a0 MPU_Config();<\/p>\n

\u00a0\u00a0\u00a0 \/* Enable the CPU Cache *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* Enable I-Cache———————————————————*\/<\/p>\n

\u00a0\u00a0\u00a0 SCB_EnableICache();<\/p>\n

\u00a0\u00a0\u00a0 \/* Enable D-Cache———————————————————*\/<\/p>\n

\u00a0\u00a0\u00a0 SCB_EnableDCache();<\/p>\n

\u00a0\u00a0\u00a0 \/* MCU Configuration——————————————————–*\/<\/p>\n

\u00a0\u00a0\u00a0 \/* Reset of all peripherals, Initializes the Flash interface and the Systick. *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_Init();<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN Init *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END Init *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* Configure the system clock *\/<\/p>\n

\u00a0\u00a0\u00a0 SystemClock_Config();<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN SysInit *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END SysInit *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* Initialize all configured peripherals *\/<\/p>\n

\u00a0\u00a0\u00a0 MX_GPIO_Init();<\/p>\n

\u00a0\u00a0\u00a0 MX_USART1_UART_Init();<\/p>\n

\u00a0\u00a0<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN 2 *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_SET);<\/p>\n

\u00a0\u00a0\u00a0 HAL_Delay(50);<\/p>\n

\u00a0\u00a0\u00a0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_RESET);<\/p>\n

\u00a0\u00a0\u00a0 HAL_Delay(50);<\/p>\n

\u00a0\u00a0\u00a0 HAL_GPIO_WritePin(GPIOA, GPIO_PIN_8, GPIO_PIN_SET);<\/p>\n

\u00a0\u00a0\u00a0 HAL_Delay(50);<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END 2 *\/<\/p>\n

\u00a0MX_LWIP_Init();<\/p>\n

\u00a0\u00a0\u00a0 \/* Infinite loop *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN WHILE *\/<\/p>\n

\u00a0 while (gnetif.ip_addr.addr == 0)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ethernetif_input(&gnetif);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 sys_check_timeouts();<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 MX_LWIP_Process();<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 *(uint32_t *)newipaddress = (gnetif.ip_addr.addr);<\/p>\n

\u00a0\u00a0\u00a0 if (new_flag)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 new_flag = 0;<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcppcbnew = tcp_new();<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 err_t res = tcp_bind(tcppcbnew, IP_ADDR_ANY, 8080);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("743 ipaddress is %d.%d.%d.%d\\\\r\\\\n", newipaddress[0], newipaddress[1], newipaddress[2], newipaddress[3]);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf(" tcp_bind res is %d\\\\r\\\\n", res);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u76d1\u542c\u4e4b\u524d\u521b\u5efa\u7684\u7ed3\u6784\u4f53tcp_server_pcb *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_server_pcb = tcp_listen(tcppcbnew);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* \u521d\u59cb\u5316\u7ed3\u6784\u4f53\u63a5\u6536\u56de\u8c03\u51fd\u6570 *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_accept(tcp_server_pcb, TCPServerAccept);<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 \/* Infinite loop *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN WHILE *\/<\/p>\n

\u00a0\u00a0\u00a0 while (1)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* USER CODE END WHILE *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \/* USER CODE BEGIN 3 *\/<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 MX_LWIP_Process();<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 num++;<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HAL_Delay(1);<\/p>\n

\/\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(num% 100000 ==0)<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("ipaddress is %d.%d.%d.%d\\\\r\\\\n", newipaddress[0], newipaddress[1], newipaddress[2], newipaddress[3]);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 count = tcp_sndbuf(tcppcbnew); \/\/\u67e5\u8be2\u5269\u4f59buf\u5927\u5c0f<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HAL_Delay(2500);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("before payload buffer is\u00a0 %d\\\\r\\\\n", count);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if ((count \/ TCP_MSS) > 1)<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0{<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_write(tcppcbnew, sendbuffer, strlen(sendbuffer), 1);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_output(tcppcbnew);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 count = tcp_sndbuf(tcppcbnew); \/\/\u67e5\u8be2\u5269\u4f59buf\u5927\u5c0f<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("after payload buffer is\u00a0 %d\\\\r\\\\n", count);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0HAL_Delay(2500);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 else<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HAL_Delay(1);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_write(tcppcbnew, sendbuffer, strlen(sendbuffer), 1);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 tcp_output(tcppcbnew);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 count = tcp_sndbuf(tcppcbnew); \/\/\u67e5\u8be2\u5269\u4f59buf\u5927\u5c0f<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("after payload buffer is\u00a0 %d\\\\r\\\\n", count);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 HAL_Delay(2500);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("after payload buffer is\u00a0 %d\\\\r\\\\n", count);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 \u00a0HAL_Delay(1000);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 if(rx_flag==1)<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 {<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 status_new=\u00a0\u00a0\u00a0 tcp_write(tcppcbnew, sendbuffer, strlen(sendbuffer), 1);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 printf("tcppcbnew status is %d\\\\r\\\\n",status_new);<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 rx_flag=0;<\/p>\n

\/\/<\/p>\n

\/\/\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END 3 *\/<\/p>\n

}<\/p>\n

\/**<\/p>\n

\u00a0 * @brief System Clock Configuration<\/p>\n

\u00a0 * @retval None<\/p>\n

\u00a0 *\/<\/p>\n

void SystemClock_Config(void)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitTypeDef RCC_OscInitStruct = {0};<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};<\/p>\n

\u00a0\u00a0\u00a0 \/** Supply configuration update enable<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_PWREx_ConfigSupply(PWR_LDO_SUPPLY);<\/p>\n

\u00a0\u00a0\u00a0 \/** Configure the main internal regulator output voltage<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);<\/p>\n

\u00a0\u00a0\u00a0 while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}<\/p>\n

\u00a0\u00a0\u00a0 __HAL_RCC_SYSCFG_CLK_ENABLE();<\/p>\n

\u00a0\u00a0\u00a0 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE0);<\/p>\n

\u00a0\u00a0\u00a0 while (!__HAL_PWR_GET_FLAG(PWR_FLAG_VOSRDY)) {}<\/p>\n

\u00a0\u00a0\u00a0 \/** Initializes the RCC Oscillators according to the specified parameters<\/p>\n

\u00a0\u00a0\u00a0 * in the RCC_OscInitTypeDef structure.<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.HSEState = RCC_HSE_ON;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLM = 1;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLN = 120;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLP = 2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLQ = 2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLR = 2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_3;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;<\/p>\n

\u00a0\u00a0\u00a0 RCC_OscInitStruct.PLL.PLLFRACN = 0;<\/p>\n

\u00a0\u00a0\u00a0 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Error_Handler();<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 \/** Initializes the CPU, AHB and APB buses clocks<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 | RCC_CLOCKTYPE_D3PCLK1 | RCC_CLOCKTYPE_D1PCLK1;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;<\/p>\n

\u00a0\u00a0\u00a0 RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;<\/p>\n

\u00a0\u00a0\u00a0 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 Error_Handler();<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 __HAL_RCC_D2SRAM1_CLK_ENABLE();<\/p>\n

\u00a0__HAL_RCC_D2SRAM2_CLK_ENABLE();<\/p>\n

\u00a0__HAL_RCC_D2SRAM3_CLK_ENABLE();<\/p>\n

\u00a0<\/p>\n

\u00a0__HAL_RCC_BKPRAM_CLKAM_ENABLE();\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

\u00a0__HAL_RCC_D3SRAM1_CLKAM_ENABLE();<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

}<\/p>\n

\/* USER CODE BEGIN 4 *\/<\/p>\n

\/* USER CODE END 4 *\/<\/p>\n

\/* MPU Configuration *\/<\/p>\n

void MPU_Config(void)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 MPU_Region_InitTypeDef MPU_InitStruct = {0};<\/p>\n

\u00a0\u00a0\u00a0 \/* Disables the MPU *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_MPU_Disable();<\/p>\n

\u00a0\u00a0\u00a0 \/** Initializes and configures the Region and the memory to be protected<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Enable = MPU_REGION_ENABLE;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER0;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30040000;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_256B;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.SubRegionDisable = 0x0;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL0;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.AccessPermission = MPU_REGION_FULL_ACCESS;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.DisableExec = MPU_INSTRUCTION_ACCESS_ENABLE;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsShareable = MPU_ACCESS_NOT_SHAREABLE;\/\/\u00a0 MPU_ACCESS_SHAREABLE<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsCacheable = MPU_ACCESS_NOT_CACHEABLE;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_BUFFERABLE;<\/p>\n

\u00a0\u00a0\u00a0 HAL_MPU_ConfigRegion(&MPU_InitStruct);<\/p>\n

\u00a0\u00a0\u00a0 \/** Initializes and configures the Region and the memory to be protected<\/p>\n

\u00a0\u00a0\u00a0 *\/<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Number = MPU_REGION_NUMBER1;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.BaseAddress = 0x30044000;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.Size = MPU_REGION_SIZE_16KB;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.TypeExtField = MPU_TEX_LEVEL1;<\/p>\n

\u00a0\u00a0\u00a0 MPU_InitStruct.IsBufferable = MPU_ACCESS_NOT_BUFFERABLE;<\/p>\n

\u00a0\u00a0\u00a0 HAL_MPU_ConfigRegion(&MPU_InitStruct);<\/p>\n

\u00a0\u00a0\u00a0 \/* Enables the MPU *\/<\/p>\n

\u00a0\u00a0\u00a0 HAL_MPU_Enable(MPU_PRIVILEGED_DEFAULT);<\/p>\n

}<\/p>\n

\/**<\/p>\n

\u00a0 * @brief\u00a0 This function is executed in case of error occurrence.<\/p>\n

\u00a0 * @retval None<\/p>\n

\u00a0 *\/<\/p>\n

void Error_Handler(void)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN Error_Handler_Debug *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* User can add his own implementation to report the HAL error return state *\/<\/p>\n

\u00a0\u00a0\u00a0 __disable_irq();<\/p>\n

\u00a0\u00a0\u00a0 while (1)<\/p>\n

\u00a0\u00a0\u00a0 {<\/p>\n

\u00a0\u00a0\u00a0 }<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END Error_Handler_Debug *\/<\/p>\n

}<\/p>\n

#ifdef\u00a0 USE_FULL_ASSERT<\/p>\n

\/**<\/p>\n

\u00a0 * @brief\u00a0 Reports the name of the source file and the source line number<\/p>\n

\u00a0 *\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 where the assert_param error has occurred.<\/p>\n

\u00a0 * @param\u00a0 file: pointer to the source file name<\/p>\n

\u00a0 * @param\u00a0 line: assert_param error line source number<\/p>\n

\u00a0 * @retval None<\/p>\n

\u00a0 *\/<\/p>\n

void assert_failed(uint8_t *file, uint32_t line)<\/p>\n

{<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE BEGIN 6 *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* User can add his own implementation to report the file name and line number,<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 ex: printf("Wrong parameters value: file %s on line %d\\\\r\\\\n", file, line) *\/<\/p>\n

\u00a0\u00a0\u00a0 \/* USER CODE END 6 *\/<\/p>\n

}<\/p>\n

#endif \/* USE_FULL_ASSERT *\/<\/p>\n

LWIP.c\u4e2d<\/p>\n

\u8fd8\u6709，\u5728lwip.c \u7f51\u7edc\u8fde\u63a5\u72b6\u6001\u66f4\u65b0\u56de\u8c03\u51fd\u6570\u91cc\u4fee\u6539\u3002<\/p>\n

static void ethernet_link_status_updated(struct netif *netif)<\/p>\n

{<\/p>\n

\u00a0\u00a0printf("\\\\r\\\\nenter netif_status_updated func\\\\r\\\\n");<\/p>\n

\u00a0\u00a0HAL_Delay(1000);<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0if (netif_is_up(netif))<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf("link available\\\\r\\\\n");<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf("IP:%hhu.%hhu.%hhu.%hhu\\\\r\\\\n",ip4_addr1_val(netif->ip_addr),ip4_addr2_val(netif->ip_addr),<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ip4_addr3_val(netif->ip_addr),ip4_addr4_val(netif->ip_addr));<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf("NM:%hhu.%hhu.%hhu.%hhu\\\\r\\\\n",ip4_addr1_val(netif->netmask),ip4_addr2_val(netif->netmask),<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ip4_addr3_val(netif->netmask),ip4_addr4_val(netif->netmask));<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf("GW:%hhu.%hhu.%hhu.%hhu\\\\r\\\\n",ip4_addr1_val(netif->gw),ip4_addr2_val(netif->gw),<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0ip4_addr3_val(netif->gw),ip4_addr4_val(netif->gw));<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0else<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0{<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0printf("link unavailable\\\\r\\\\n");<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/p>\n

\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0}<\/p>\n

} <\/p>\n

5\u3001<\/span><\/span>LWIP\u5b9e\u6218\u9a8c\u8bc1\u6d4b\u8bd5<\/span><\/span><\/h2>\n

\u00a05.1\u4f7f\u7528\u6b63\u70b9\u539f\u5b50\u7684\u7f51\u7edc\u52a9\u624b\u6d4b\u8bd5<\/span><\/span><\/h3>\n

\u7b2c\u4e00\u6b21\u6d4b\u8bd5<\/span><\/span><\/p>\n

\u4fee\u6539TCP_SND_QUEUELEN 9 <\/span><\/span><\/p>\n

#define TCP_SND_BUF\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (4* TCP_MSS)\u00a0\u00a0 \/\/(2 * TCP_MSS)<\/span><\/span><\/p>\n

TCP_MSS\u00a0\u00a0 536<\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u2460\u3001Sendbuf<\/span><\/span><\/p>\n

20250106hello<\/span><\/span><\/p>\n

1<\/span>\u5206\u949f\u53d1\u9001453300B<\/span><\/span><\/p>\n

\u901f\u73877.5KB\/S<\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u2461\u3001Sendbuf <\/span><\/span><\/p>\n

20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello<\/span><\/span><\/p>\n

1<\/span>\u5206\u949f\u53d1\u90011162 000B<\/span><\/span><\/p>\n

\u901f\u738719KB\/S<\/span><\/span><\/p>\n

\"\"<\/p>\n

\u2462\u3001Sendbuf <\/span><\/span><\/p>\n

20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello<\/span><\/span><\/p>\n

1<\/span>\u5206\u949f\u53d1\u9001366 788<\/span><\/span><\/p>\n

\u901f\u73876.1KB\/S<\/span><\/span><\/p>\n

\"\"\u00a0<\/span><\/p>\n

\u00a0\u00a0<\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u7b2c\u4e8c\u6b21\u6d4b\u8bd5<\/span><\/span><\/p>\n

\u00a0\u00a0\u4fee\u6539TCP_SND_QUEUELEN 12 \/\/9<\/span><\/span><\/p>\n

#define TCP_SND_BUF\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (6 * TCP_MSS)\u00a0\u00a0 \/\/(2 * TCP_MSS)<\/span><\/span><\/p>\n

TCP_MSS 536<\/span><\/span><\/p>\n

\u00a0\u00a0\u00a0<\/span><\/p>\n

\u2460<\/span>\u3001Sendbuf <\/span><\/span><\/p>\n

20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello<\/span><\/span><\/p>\n

1<\/span>\u5206\u949f\u53d1\u900197 3824<\/span><\/span><\/p>\n

\u901f\u738716KB\/S<\/span><\/span><\/p>\n

\"\"<\/p>\n

\u00a0<\/span><\/p>\n

\u7b2c\u4e09\u6b21\u6d4b\u8bd5<\/span><\/span><\/p>\n

\u00a0\u00a0<\/span><\/p>\n

\u4fee\u6539TCP_SND_QUEUELEN 6\/\/9<\/span><\/span><\/p>\n

#define TCP_SND_BUF\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 (3 * TCP_MSS)\u00a0\u00a0 \/\/(2 * TCP_MSS)<\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u6d4b\u8bd520s\u53d1\u9001302 924<\/span><\/span><\/p>\n

\u901f\u738715KB\/S<\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\"\"<\/p>\n

\u00a0\u00a0\u00a0\u00a0<\/span><\/p>\n

\u589e\u52a0<\/span><\/span><\/p>\n

tcp_output(tcppcbnew);<\/span><\/span><\/p>\n

#define TCP_MSS\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 1460\u00a0 \/\/536<\/span><\/span><\/p>\n

#define TCP_WND_UPDATE_THRESHOLD\u00a0 1460\/\/536<\/span><\/span><\/p>\n

#if TCP_MSS > 536<\/span><\/span><\/p>\n

#define INITIAL_MSS TCP_MSS \/\/536<\/span><\/span><\/p>\n

\u00a0<\/span><\/p>\n

\u53d1\u90011\u5206\u949f<\/span><\/span><\/p>\n

15 739 425<\/span>，\u901f\u7387\u8fbe\u52300.25MB\/s<\/span><\/span><\/p>\n

\u00a0\u00a0<\/span><\/p>\n

\"\"<\/p>\n

\n

\u4e0d\u663e\u793a\u63a5\u6536\u6570\u636e，\u518d\u6d4b\u8bd5\u80fd\u52303Mb\/s<\/span><\/p>\n

\n

5.2\u7136\u540e\u7528netassist\u6d4b\u8bd5\u3002<\/span><\/h3>\n

\u2460char sendbuffer[] = "20250106hel20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/span><\/p>\n

\u6d4b\u8bd5\u65f6\u95f4：1\u5206\u949f<\/span><\/p>\n

\u53d1\u9001\u6570\u636e：143 631 765 B<\/span><\/p>\n

\u5bf9\u5e94\u7684\u7f51\u901f\u4e3a：19.150902 Mb\/s<\/span><\/p>\n

\n

\"\"<\/p>\n

\u2461\u4fee\u6539<\/span><\/span><\/p>\n

char sendbuffer[] = "20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/span><\/p>\n

\u6d4b\u8bd5\u65f6\u95f4：1\u5206\u949f<\/span><\/p>\n

\u53d1\u9001\u6570\u636e：143 658 285<\/span><\/p>\n

\u5bf9\u5e94\u7684\u7f51\u901f\u4e3a：19.154438 Mb\/s<\/span><\/p>\n

\"\"<\/p>\n

\u2462\u4fee\u6539\u6d4b\u8bd5\u65f6\u95f4\u3002<\/span><\/span><\/p>\n

char sendbuffer[] = "20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello20250106hello\\\\r\\\\n";<\/span><\/p>\n

\n

\u6d4b\u8bd5\u65f6\u95f4：100\u79d2<\/span><\/p>\n

\u53d1\u9001\u6570\u636e：325 879 580<\/span><\/p>\n

\u5bf9\u5e94\u7684\u7f51\u901f\u4e3a：26.070366 Mb\/s（\u8d85\u8fc725Mb\/s）<\/span><\/p>\n

\u5bf9\u5e94\u7684\u4ee5\u592a\u7f51\u5e27\u6570\u76ee：218867<\/span><\/p>\n

\u6bcf\u4e2a\u5e27\u957f：1489<\/span><\/p>\n

\n

\"\"<\/p>\n

5.3\u7528\u7535\u8111\u6d4b\u8bd5<\/span><\/h3>\n

\u540e\u6765\u77e5\u9053，\u7528\u7535\u8111\u4e5f\u80fd\u6d4b\u8bd5\u7f51\u901f，<\/span><\/p>\n

\u6253\u5f00\u4efb\u52a1\u7ba1\u7406\u5668\u2014\u2014\u6027\u80fd\u2014\u2014\u4ee5\u592a\u7f51<\/span><\/p>\n

\"\"<\/p>\n

\u770b\u5230\u53d1\u9001\u901f\u5ea6\u80fd\u8fbe\u523034Mbps\u3002<\/span><\/p>\n

\n

5.4\u5bf9H723\u518d\u6b21\u6d4b\u8bd5<\/span><\/h3>\n

\"\"<\/p>\n

\u53d1\u9001\u901f\u5ea6\u80fd\u8fbe\u523038Mbps\u3002<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"

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