static void get_time()
{
struct timeval now;
int sntp_retry_cnt = 0;
int sntp_retry_time = 0;
sntp_setoperatingmode(0);
sntp_setservername(0, "pool.ntp.org");
sntp_init();
while (1) {
for (int32_t i = 0; (i < (SNTP_RECV_TIMEOUT / 100)) && now.tv_sec < 1525952900; i++) {
vTaskDelay(100 / portTICK_RATE_MS);
gettimeofday(&now, NULL);
}
if (now.tv_sec < 1525952900) {
sntp_retry_time = SNTP_RECV_TIMEOUT << sntp_retry_cnt;
if (SNTP_RECV_TIMEOUT << (sntp_retry_cnt + 1) < SNTP_RETRY_TIMEOUT_MAX) {
sntp_retry_cnt ++;
}
printf("SNTP get time failed, retry after %d ms\n", sntp_retry_time);
vTaskDelay(sntp_retry_time / portTICK_RATE_MS);
} else {
printf("SNTP get time success\n");
break;
}
}
}
void
sntp_task(void *pvParameters) {
while (sdk_wifi_station_get_connect_status() != STATION_GOT_IP) {
vTaskDelay(10);
};
/*
* Set one of SNTP_OPMODE_LISTENONLY or SNTP_OPMODE_POLL
*/
/*
* SNTP_OPMODE_LISTENONLY
* just needs the mode set, no server names required
* (requires broadcast NTP on your network)
*/
sntp_setoperatingmode(SNTP_OPMODE_LISTENONLY);
/*
* SNTP_OPMODE_POLL
* Needs one or more server names set
* additional servers are "fail over"
* Can use a DNS name or an address literal
* LWIP can also be configured with SNTP_GET_SERVERS_FROM_DHCP
* (DHCP-specified SNTP servers untested at this time)
*
* NOTE: Early testing with polling shows higher deviations
* than seen with broadcast, even with RTT compensation
* Cause unknown at this time, but believed to be within SNTP
* amd not part of timekeeping itself.
*/
/*
sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_setservername(0, "ntp_a.example.com");
sntp_setservername(1, "ntp_b.example.com");
sntp_setservername(2, "ntp_c.example.com");
*/
/* Once set up, this is all it takes */
sntp_init();
/*
* Have high-priority thread "parked", might as well use it
* Show calling gettimeofday() once an hour to check for timer wrap
* (the SNTP process itself, if connected, should be sufficient)
*/
while (1) {
vTaskDelay(60 * 60 * (1000 / portTICK_PERIOD_MS));
printf("gettimeofday(NULL, NULL)\n");
gettimeofday(NULL, NULL);
}
}
static void
tcpip_init_done(void *arg)
{
sys_sem_t *sem;
sem = (sys_sem_t *)arg;
init_netifs();
#if LWIP_IPV4
netbiosns_set_name("simhost");
netbiosns_init();
#endif /* LWIP_IPV4 */
sntp_setoperatingmode(SNTP_OPMODE_POLL);
#if LWIP_DHCP
sntp_servermode_dhcp(1); /* get SNTP server via DHCP */
#else /* LWIP_DHCP */
#if LWIP_IPV4
sntp_setserver(0, netif_ip_gw4(&netif));
#endif /* LWIP_IPV4 */
#endif /* LWIP_DHCP */
sntp_init();
#if LWIP_SNMP
lwip_privmib_init();
#if SNMP_LWIP_MIB2
#if SNMP_USE_NETCONN
snmp_threadsync_init(&snmp_mib2_lwip_locks, snmp_mib2_lwip_synchronizer);
#endif /* SNMP_USE_NETCONN */
snmp_mib2_set_syscontact_readonly((const u8_t*)"root", NULL);
snmp_mib2_set_syslocation_readonly((const u8_t*)"lwIP development PC", NULL);
snmp_mib2_set_sysdescr((const u8_t*)"simhost", NULL);
#endif /* SNMP_LWIP_MIB2 */
snmp_set_mibs(mibs, LWIP_ARRAYSIZE(mibs));
snmp_init();
#endif /* LWIP_SNMP */
sys_sem_signal(sem);
}
static void initialize_sntp(void)
{
sntp_setoperatingmode(SNTP_OPMODE_POLL);
sntp_setservername(0, "pool.ntp.org");
sntp_init();
}