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Add mg_now()

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This commit is contained in:
Sergey Lyubka 2024-05-08 14:23:17 +01:00
parent b7f9e5c947
commit 573f13c1ed
1 changed files with 30 additions and 0 deletions
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30
examples/mqtt-dashboard/device/net.c
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@ -20,6 +20,11 @@ struct device_config {
};
static struct device_config s_device_config;
static uint64_t s_boot_timestamp = 0; // Updated by SNTP
uint64_t mg_now(void) {
return mg_millis() + s_boot_timestamp;
}
// Device ID generation function. Create an ID that is unique
// for a given device, and does not change between device restarts.
@ -272,6 +277,30 @@ static void timer_ping(void *arg) {
(void) arg;
}
// SNTP connection event handler. When we get a response from an SNTP server,
// adjust s_boot_timestamp. We'll get a valid time from that point on
static void sntp_ev_handler(struct mg_connection *c, int ev, void *ev_data) {
uint64_t *expiration_time = (uint64_t *) c->data;
if (ev == MG_EV_OPEN) {
*expiration_time = mg_millis() + 3000; // Store expiration time in 3s
} else if (ev == MG_EV_SNTP_TIME) {
uint64_t t = *(uint64_t *) ev_data;
s_boot_timestamp = t - mg_millis();
c->is_closing = 1;
} else if (ev == MG_EV_POLL) {
if (mg_millis() > *expiration_time) c->is_closing = 1;
}
}
static void timer_sntp(void *param) { // SNTP timer function. Sync up time
static uint64_t hourly_timer = 0;
if (s_boot_timestamp == 0 ||
mg_timer_expired(&hourly_timer, 3600000, mg_millis())) {
mg_sntp_connect(param, "udp://time.google.com:123", sntp_ev_handler, NULL);
}
}
void web_init(struct mg_mgr *mgr) {
int i, ping_interval_ms = MQTT_KEEPALIVE_SEC * 1000 - 500;
set_device_id();
@ -296,6 +325,7 @@ void web_init(struct mg_mgr *mgr) {
mg_timer_add(mgr, 3000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_reconnect,
mgr);
mg_timer_add(mgr, ping_interval_ms, MG_TIMER_REPEAT, timer_ping, mgr);
mg_timer_add(mgr, 2000, MG_TIMER_REPEAT, timer_sntp, mgr);
}
void web_free(void) {