stm32加入32个组播的程序
时间: 2023-08-04 12:08:34 浏览: 67
以下是一个基于STM32的加入32个组播的程序示例,使用的是UDP协议:
```c
#include "stm32f10x.h"
#include <stdio.h>
#include <string.h>
#define UDP_PORT 1234 //UDP端口号
#define UDP_BUFFER_SIZE 1024 //UDP缓冲区大小
#define MULTICAST_IP_COUNT 32 //组播IP数量
uint8_t udp_buffer[UDP_BUFFER_SIZE]; //UDP缓冲区
int main(void)
{
//启用系统时钟、GPIO和UART
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
SystemInit();
//配置UART2
GPIO_InitTypeDef GPIO_InitStructure;
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOA, &GPIO_InitStructure);
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 115200;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx;
USART_Init(USART2, &USART_InitStructure);
USART_Cmd(USART2, ENABLE);
//配置UDP端口
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);
//配置UDP发送
USART_InitTypeDef USART_InitStructure;
USART_InitStructure.USART_BaudRate = 1000000;
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_InitStructure.USART_Parity = USART_Parity_No;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Tx;
USART_Init(USART3, &USART_InitStructure);
//加入组播组
struct ip_mreq mreq;
int i;
for (i = 0; i < MULTICAST_IP_COUNT; i++) {
mreq.imr_multiaddr.s_addr = htonl(INADDR_MULTICAST + i);
mreq.imr_interface.s_addr = htonl(INADDR_ANY);
setsockopt(sock, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq));
}
//循环发送UDP数据
while (1) {
//构造UDP数据
//...
//发送UDP数据
int i;
for (i = 0; i < MULTICAST_IP_COUNT; i++) {
struct sockaddr_in addr;
addr.sin_family = AF_INET;
addr.sin_port = htons(UDP_PORT);
addr.sin_addr.s_addr = htonl(INADDR_MULTICAST + i);
int result = sendto(sock, udp_buffer, udp_length, 0, (struct sockaddr*)&addr, sizeof(addr));
if (result != udp_length) {
//发送失败
}
}
}
return 0;
}
```
需要注意的是,此示例中的代码仅用于说明如何加入32个组播,实际使用时还需要根据具体需求进行修改和调整。
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