/* The usage description of udp server on rt-Thread.  */
static void usage(void)
/* The usage description of udp server on rt-Thread.  */
static void usage(void)
{
    rt_kprintf("Usage: udpserver -p <port>\n");
    rt_kprintf("       udpserver --stop\n");
    rt_kprintf("       udpserver --help\n");
    rt_kprintf("\n");
    rt_kprintf("Miscellaneous:\n");
    rt_kprintf("  -p           Specify the host port number\n");
    rt_kprintf("  --stop       Stop udpserver program\n");
    rt_kprintf("  --help       Print help information\n");
}