unix_time.c

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#include <esp8266.h>
#include "debug.h"
#include "unix_time.h"
#include <sntp.h>

static os_timer_t sntp_check_timer;

uint32_t init_time = 0;
uint32_t current_unix_time;
uint32_t ntp_offline_second_counter = 0;

uint64_t boot_time;

static os_timer_t ntp_offline_second_counter_timer;

ICACHE_FLASH_ATTR void static sntp_check_timer_func(void *arg) {
    current_unix_time = sntp_get_current_timestamp();
    
    if (current_unix_time == 0) {
        os_timer_disarm(&sntp_check_timer);
        os_timer_arm(&sntp_check_timer, 2000, 0);
    } else {
        os_timer_disarm(&sntp_check_timer);
        // save init time for use in get_uptime()
        if (init_time == 0) {       // only set init_time at boot
            os_timer_disarm(&ntp_offline_second_counter_timer);     // stop offline second counter
            
            init_time = current_unix_time;
        }
    }
}

ICACHE_FLASH_ATTR void static ntp_offline_second_counter_timer_func(void *arg) {
    ntp_offline_second_counter++;
}

ICACHE_FLASH_ATTR void init_unix_time(void) {
    // init sntp
    sntp_setservername(0, "dk.pool.ntp.org"); // set server 0 by domain name
    sntp_setservername(1, "us.pool.ntp.org"); // set server 1 by domain name
    sntp_set_timezone(0);   // UTC time
    sntp_init();
    
    // start timer to make sure we go ntp reply
    os_timer_disarm(&sntp_check_timer);
    os_timer_setfn(&sntp_check_timer, (os_timer_func_t *)sntp_check_timer_func, NULL);
    os_timer_arm(&sntp_check_timer, 2000, 0);

    ntp_offline_second_counter = 0;
    os_timer_disarm(&ntp_offline_second_counter_timer);
    os_timer_setfn(&ntp_offline_second_counter_timer, (os_timer_func_t *)ntp_offline_second_counter_timer_func, NULL);
    os_timer_arm(&ntp_offline_second_counter_timer, 1000, 1);       // every seconds
}

ICACHE_FLASH_ATTR uint32_t get_unix_time(void) {
    current_unix_time = sntp_get_current_timestamp();

    return current_unix_time;
}

ICACHE_FLASH_ATTR uint32_t get_uptime(void) {
    current_unix_time = sntp_get_current_timestamp();
    if (init_time == 0) {
        return ntp_offline_second_counter;
    }
    else {
        return current_unix_time - init_time + ntp_offline_second_counter;
    }
}