stm32接收32个组播IP的程序
时间: 2023-08-10 10:04:43 浏览: 49
以下是一个基于STM32的接收32个组播IP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接收
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_Rx;
USART_Init(USART3, &USART_InitStructure);
USART_DMACmd(USART3, USART_DMAReq_Rx, ENABLE);
DMA_InitTypeDef DMA_InitStructure;
DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&USART3->DR;
DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)udp_buffer;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
DMA_InitStructure.DMA_BufferSize = UDP_BUFFER_SIZE;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
DMA_Init(DMA1_Channel3, &DMA_InitStructure);
//启动DMA和UDP接收
DMA_Cmd(DMA1_Channel3, ENABLE);
USART_Cmd(USART3, ENABLE);
//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));
}
//循环接收并处理UDP数据
while (1) {
int length = DMA_GetCurrDataCounter(DMA1_Channel3);
if (length > 0) {
//处理UDP数据
//...
}
}
return 0;
}
```
需要注意的是,此示例中的代码仅用于说明如何接收32个组播IP,实际使用时还需要根据具体需求进行修改和调整。