wordpress验证码插件,网站性能优化方法,广州专业网页制作公司,中国能源建设股份有限公司新网站先说写作本文的原因#xff0c;由于开项目开发中需要用到UDP组播接收的功能#xff0c;但是ST官方没有提供合适的参考#xff0c;使用STM32CubeMX生成的代码也是不能直接使用的#xff0c;而我在网上找了一大圈#xff0c;也没有一个能够直接解决的方案#xff0c;deepse…先说写作本文的原因由于开项目开发中需要用到UDP组播接收的功能但是ST官方没有提供合适的参考使用STM32CubeMX生成的代码也是不能直接使用的而我在网上找了一大圈也没有一个能够直接解决的方案deepseek、ChatGPT给的方案也不能直接用羡慕迷茫阶段。然而随着项目进度告急我也只能硬着头皮摸着石头过河了总结了大多数资料的观点加上deepseek的帮助最终找到了关键点因此希望写一个记录文档同时也给大家参考若有高手也可以指点指点。
开发环境
单片机型号是STM32F407VGT6以太网控制器是LAN7820软件版本如下
STM32CubeMX6.12.1
IAR 9.50.2
STM32Cube FW_F4 V1.28.1使用STM32CubeMX生成代码
配置JTAG 配置以太网外设选择RMII打开以太网全局中断 打开串口1方便调试添加DMA 启用LWIP
这里的关键是勾选右上角的Show Advance Parameters然后使能LWIP_MULTICAST_TX_OPTONS (Multicast Tx support)
使能LWIP_IGMP (IGMP module) PHY选择LAN8742实际上使用的是LAN8720 设置PHY的复位引脚默认输出为高 最后配置时钟 生成代码
关键代码
生成的代码是不能直接使用的需要做一些关键修改这里添加了组播初始化函数和回调函数
/* USER CODE BEGIN Header */
/********************************************************************************* file : main.c* brief : Main program body******************************************************************************* attention** Copyright (c) 2025 STMicroelectronics.* All rights reserved.** This software is licensed under terms that can be found in the LICENSE file* in the root directory of this software component.* If no LICENSE file comes with this software, it is provided AS-IS.********************************************************************************/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include main.h
#include dma.h
#include lwip.h
#include usart.h
#include gpio.h/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include string.h
#include lwip/udp.h
#include lwip/igmp.h
/* USER CODE END Includes *//* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD *//* USER CODE END PTD *//* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD *//* USER CODE END PD *//* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM *//* USER CODE END PM *//* Private variables ---------------------------------------------------------*//* USER CODE BEGIN PV *//* USER CODE END PV *//* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP *//* USER CODE END PFP *//* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
// 定义组播地址和端口
u16_t multicast_port8554;
uint8_t multicast_ip[4]{226,0,0,80};void multicast_receive_callback(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port) { if (p ! NULL) {static uint8_t buff[128];memcpy(buff, p-payload, p-len);HAL_UART_Transmit_DMA(huart1, (uint8_t *)buff, p-len);pbuf_free(p);}
}// 初始化MULTICAST接收协议控制块
void multicast_receive_init(void) {struct udp_pcb *pcb;ip4_addr_t ip;IP4_ADDR(ip, multicast_ip[0], multicast_ip[1], multicast_ip[2], multicast_ip[3]);igmp_joingroup(IP4_ADDR_ANY, ip);pcb udp_new();pcb-so_options | SOF_REUSEADDR; // 允许地址重用
// pcb-mcast_ttl 1; // 组播TTL默认1限制在本地网络if (pcb ! NULL) {udp_bind(pcb, IP4_ADDR_ANY, multicast_port);udp_recv(pcb, multicast_receive_callback, NULL);}
}
/* USER CODE END 0 *//*** brief The application entry point.* retval int*/
int main(void)
{/* USER CODE BEGIN 1 *//* USER CODE END 1 *//* MCU Configuration--------------------------------------------------------*//* Reset of all peripherals, Initializes the Flash interface and the Systick. */HAL_Init();/* USER CODE BEGIN Init *//* USER CODE END Init *//* Configure the system clock */SystemClock_Config();/* USER CODE BEGIN SysInit *//* USER CODE END SysInit *//* Initialize all configured peripherals */MX_GPIO_Init();MX_DMA_Init();MX_USART1_UART_Init();MX_LWIP_Init();/* USER CODE BEGIN 2 */multicast_receive_init();/* USER CODE END 2 *//* Infinite loop *//* USER CODE BEGIN WHILE */while (1){MX_LWIP_Process();/* USER CODE END WHILE *//* USER CODE BEGIN 3 */}/* USER CODE END 3 */
}/*** brief System Clock Configuration* retval None*/
void SystemClock_Config(void)
{RCC_OscInitTypeDef RCC_OscInitStruct {0};RCC_ClkInitTypeDef RCC_ClkInitStruct {0};/** Configure the main internal regulator output voltage*/__HAL_RCC_PWR_CLK_ENABLE();__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);/** Initializes the RCC Oscillators according to the specified parameters* in the RCC_OscInitTypeDef structure.*/RCC_OscInitStruct.OscillatorType RCC_OSCILLATORTYPE_HSI;RCC_OscInitStruct.HSIState RCC_HSI_ON;RCC_OscInitStruct.HSICalibrationValue RCC_HSICALIBRATION_DEFAULT;RCC_OscInitStruct.PLL.PLLState RCC_PLL_ON;RCC_OscInitStruct.PLL.PLLSource RCC_PLLSOURCE_HSI;RCC_OscInitStruct.PLL.PLLM 8;RCC_OscInitStruct.PLL.PLLN 168;RCC_OscInitStruct.PLL.PLLP RCC_PLLP_DIV2;RCC_OscInitStruct.PLL.PLLQ 4;if (HAL_RCC_OscConfig(RCC_OscInitStruct) ! HAL_OK){Error_Handler();}/** Initializes the CPU, AHB and APB buses clocks*/RCC_ClkInitStruct.ClockType RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;RCC_ClkInitStruct.SYSCLKSource RCC_SYSCLKSOURCE_PLLCLK;RCC_ClkInitStruct.AHBCLKDivider RCC_SYSCLK_DIV1;RCC_ClkInitStruct.APB1CLKDivider RCC_HCLK_DIV4;RCC_ClkInitStruct.APB2CLKDivider RCC_HCLK_DIV2;if (HAL_RCC_ClockConfig(RCC_ClkInitStruct, FLASH_LATENCY_5) ! HAL_OK){Error_Handler();}
}/* USER CODE BEGIN 4 *//* USER CODE END 4 *//*** brief Period elapsed callback in non blocking mode* note This function is called when TIM1 interrupt took place, inside* HAL_TIM_IRQHandler(). It makes a direct call to HAL_IncTick() to increment* a global variable uwTick used as application time base.* param htim : TIM handle* retval None*/
void HAL_TIM_PeriodElapsedCallback(TIM_HandleTypeDef *htim)
{/* USER CODE BEGIN Callback 0 *//* USER CODE END Callback 0 */if (htim-Instance TIM1) {HAL_IncTick();}/* USER CODE BEGIN Callback 1 *//* USER CODE END Callback 1 */
}/*** brief This function is executed in case of error occurrence.* retval None*/
void Error_Handler(void)
{/* USER CODE BEGIN Error_Handler_Debug *//* User can add his own implementation to report the HAL error return state */__disable_irq();while (1){}/* USER CODE END Error_Handler_Debug */
}#ifdef USE_FULL_ASSERT
/*** brief Reports the name of the source file and the source line number* where the assert_param error has occurred.* param file: pointer to the source file name* param line: assert_param error line source number* retval None*/
void assert_failed(uint8_t *file, uint32_t line)
{/* USER CODE BEGIN 6 *//* User can add his own implementation to report the file name and line number,ex: printf(Wrong parameters value: file %s on line %d\r\n, file, line) *//* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
另外一个关键的地方是需要在.\LWIP\Target\ethernetif.c文件中的low_level_init函数添加 强制接收所有组播包 以及 确保启用 IGMP 支持
/*******************************************************************************LL Driver Interface ( LwIP stack -- ETH)
*******************************************************************************/
/*** brief In this function, the hardware should be initialized.* Called from ethernetif_init().** param netif the already initialized lwip network interface structure* for this ethernetif*/
static void low_level_init(struct netif *netif)
{HAL_StatusTypeDef hal_eth_init_status HAL_OK;/* Start ETH HAL Init */uint8_t MACAddr[6] ;heth.Instance ETH;MACAddr[0] 0x00;MACAddr[1] 0x80;MACAddr[2] 0xE1;MACAddr[3] 0x00;MACAddr[4] 0x00;MACAddr[5] 0x00;heth.Init.MACAddr MACAddr[0];heth.Init.MediaInterface HAL_ETH_RMII_MODE;heth.Init.TxDesc DMATxDscrTab;heth.Init.RxDesc DMARxDscrTab;heth.Init.RxBuffLen 1536;/* USER CODE BEGIN MACADDRESS *//* USER CODE END MACADDRESS */hal_eth_init_status HAL_ETH_Init(heth);memset(TxConfig, 0 , sizeof(ETH_TxPacketConfig));TxConfig.Attributes ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD;TxConfig.ChecksumCtrl ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC;TxConfig.CRCPadCtrl ETH_CRC_PAD_INSERT;/* End ETH HAL Init *//* Initialize the RX POOL */LWIP_MEMPOOL_INIT(RX_POOL);#if LWIP_ARP || LWIP_ETHERNET/* set MAC hardware address length */netif-hwaddr_len ETH_HWADDR_LEN;/* set MAC hardware address */netif-hwaddr[0] heth.Init.MACAddr[0];netif-hwaddr[1] heth.Init.MACAddr[1];netif-hwaddr[2] heth.Init.MACAddr[2];netif-hwaddr[3] heth.Init.MACAddr[3];netif-hwaddr[4] heth.Init.MACAddr[4];netif-hwaddr[5] heth.Init.MACAddr[5];/* maximum transfer unit */netif-mtu ETH_MAX_PAYLOAD;/* Accept broadcast address and ARP traffic *//* dont set NETIF_FLAG_ETHARP if this device is not an ethernet one */#if LWIP_ARPnetif-flags | NETIF_FLAG_BROADCAST | NETIF_FLAG_ETHARP;#elsenetif-flags | NETIF_FLAG_BROADCAST;#endif /* LWIP_ARP *//* USER CODE BEGIN PHY_PRE_CONFIG *//* USER CODE END PHY_PRE_CONFIG *//* Set PHY IO functions */LAN8742_RegisterBusIO(LAN8742, LAN8742_IOCtx);/* Initialize the LAN8742 ETH PHY */if(LAN8742_Init(LAN8742) ! LAN8742_STATUS_OK){netif_set_link_down(netif);netif_set_down(netif);return;}if (hal_eth_init_status HAL_OK){/* Get link state */ethernet_link_check_state(netif);}else{Error_Handler();}
#endif /* LWIP_ARP || LWIP_ETHERNET *//* USER CODE BEGIN LOW_LEVEL_INIT */// --- 核心修复代码直接操作寄存器 ---ETH-MACFFR | ETH_MACFFR_PAM; // 强制接收所有组播包netif-flags | NETIF_FLAG_IGMP; // 确保启用 IGMP 支持/* USER CODE END LOW_LEVEL_INIT */
}上位机软件
为了配合测试这里用python写了一个简单的上位机测试软件
import socket
import structMCAST_GROUP 226.0.0.80
MCAST_PORT 8554
LOCAL_IP 192.168.88.2 # 替换为你的实际 IPv4 地址# 创建 UDP 套接字
sock socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind((, MCAST_PORT))# 通过 IP 地址绑定到指定接口Windows 兼容方案
sock.setsockopt(socket.IPPROTO_IP,socket.IP_ADD_MEMBERSHIP,socket.inet_aton(MCAST_GROUP) socket.inet_aton(LOCAL_IP)
)print(f监听组播 {MCAST_GROUP}:{MCAST_PORT}...)
while True:data, addr sock.recvfrom(1024)print(f来自 {addr} 的消息: {data.decode()})# sender.py
import socketMCAST_GROUP 226.0.0.80
MCAST_PORT 8554
INTERFACE_IP 192.168.88.2 # --- 替换为你的实际 IPv4 地址sock socket.socket(socket.AF_INET, socket.SOCK_DGRAM, socket.IPPROTO_UDP)
sock.setsockopt(socket.IPPROTO_IP, socket.IP_MULTICAST_IF, socket.inet_aton(INTERFACE_IP))message Multicast Test
sock.sendto(message.encode(), (MCAST_GROUP, MCAST_PORT))
print(消息已发送)
sock.close()实测效果
可以看到使用脚本发送数据可以上位机软件成功接收。同时单片机收到数据之后通过串口发送到了串口助手实验成功。
参考代码 https://github.com/dwgan/STM32-Multicast
