通过C# Winform向STM32发送UDP数据

using System;
using System.Net;
using System.Net.Sockets;
using System.Text;

public class UdpSender
{
    private UdpClient udpClient;
    private IPEndPoint endPoint;

    public UdpSender(string stm32IpAddress, int stm32Port)
    {
        udpClient = new UdpClient();
        endPoint = new IPEndPoint(IPAddress.Parse(stm32IpAddress), stm32Port);
    }

    public void SendData(string data)
    {
        byte[] bytes = Encoding.ASCII.GetBytes(data);
        udpClient.Send(bytes, bytes.Length, endPoint);
    }
}

#include "main.h"
#include "lwip.h"
#include "udp_echoserver.h"

void udp_echoserver_init(void)
{
  struct udp_pcb *pcb;
  err_t err;

  /* Create a new UDP control block  */
  pcb = udp_new();
  if (pcb != NULL)
  {
    /* Bind the UDP control block to the specified local IP address and port */
    err = udp_bind(pcb, IP_ADDR_ANY, UDP_SERVER_PORT);
    if (err == ERR_OK)
    {
      /* Set a receive callback for the UDP control block */
      udp_recv(pcb, udp_echoserver_receive_callback, NULL);
    }
    else
    {
      /* Free the UDP control block if binding fails */
      udp_remove(pcb);
    }
  }
}

void udp_echoserver_receive_callback(void *arg, struct udp_pcb *pcb, struct pbuf *p, const ip_addr_t *addr, u16_t port)
{
  /* Process received UDP data here */
  
  /* Free the pbuf and release the RX buffer */
  pbuf_free(p);
}