我想从服务器向客户端发送两种不同类型的消息。我已经为这两个不同的消息data_signal()
创建了两个函数。probe_signal()
该data_signal()
函数将定期向客户端发送一个间隔为 的定义消息CLOCK_SECOND * 1
。
我使用一个用于间隔CLOCK_SECOND * 30
持续时间的计时器来定期调用probe_signal()
以向客户端发送不同的消息。
目前该data_signal()
功能正在按预期工作。但是,该probe_signal()
功能不会将其消息发送给客户端。
我通过简单地在客户端打印消息验证了这一点,并且没有收到“probe_signal()”消息。
此外,如果我评论uip_udp_packet_send(conn, buf, strlen(buf));
那一行,data_signal()
我就能收到来自probe_signal()
. 我认为这个问题正在发生,因为我使用的是相同的 UDP 连接
代码:
#include "contiki.h"
#include "contiki-lib.h"
#include "contiki-net.h"
#define DEBUG DEBUG_FULL
#include "net/ip/uip-debug.h"
#include "net/ip/uiplib.h"
#include "net/ipv6/uip-icmp6.h"
#include <string.h>
#define SERVER_IP "fe80::9a07:2dff:fe3c:8d01" //"::"
#define CLIENT_PORT 61617
#define SERVER_PORT 61616
#define PING_TIMEOUT (CLOCK_SECOND / 4)
#define CLIENT_SEND_INTERVAL (CLOCK_SECOND * 1)
#define UDP_LEN_MAX 255
/*---------------------------------------------------------------------------*/
static uip_ipaddr_t server_addr;
static struct uip_icmp6_echo_reply_notification icmp_notification;
static uint8_t echo_received;
static struct uip_udp_conn *conn;
static struct etimer timer;
static char buf[UDP_LEN_MAX];
static uint16_t packet_counter;
static uint16_t probe_packet_counter;
static uint16_t actualSent_packet_counter;
static int flag;
/*---------------------------------------------------------------------------*/
PROCESS(ipv6_ble_client_process, "IPv6 over BLE - client process");
AUTOSTART_PROCESSES(&ipv6_ble_client_process);
/*---------------------------------------------------------------------------*/
void icmp_reply_handler(uip_ipaddr_t *source, uint8_t ttl,
uint8_t *data, uint16_t datalen)
{
PRINTF("echo response received\n");
echo_received = 1;
}
/*---------------------------------------------------------------------------*/
static void tcpip_handler(void)
{
}
/*---------------------------------------------------------------------------*/
static void
data_signal(void)
{
sprintf(buf, "Current packet count is: %04u!",packet_counter);
PRINTF("send message: <%s>\n", buf); /*This printf is commented for understanding the low level code*/
uip_udp_packet_send(conn, buf, strlen(buf));
packet_counter++;
}
static void probe_signal(void)
{
sprintf(buf, "%04u", probe_packet_counter);
uip_udp_packet_send(conn, buf, strlen(buf));
printf("Probe signal is sent");
}
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(ipv6_ble_client_process, ev, data)
{
static struct timer t;
PROCESS_BEGIN();
PRINTF("CC26XX-IPv6-over-BLE client started\n");
conn = udp_new(&server_addr, UIP_HTONS(SERVER_PORT), NULL);
udp_bind(conn, UIP_HTONS(CLIENT_PORT));
timer_set(&t, CLOCK_SECOND * 30);
etimer_set(&timer, CLIENT_SEND_INTERVAL);
while(1)
{
if(timer_expired(&t))
{
flag =1;
if(flag==1)
{
probe_signal();
timer_reset(&t);
printf("Timer is reset\n");
}
}
PROCESS_YIELD();
if((ev == PROCESS_EVENT_TIMER) && (data == &timer))
{
data_signal();
etimer_set(&timer, CLIENT_SEND_INTERVAL);
}
else if(ev == tcpip_event)
{
printf("TCPIP event occured\n");
tcpip_handler();
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
有人可以指导如何解决这个问题,这将是一个很大的帮助。