use native esp32 64bit timer for uptime

lib/uuid-common/src/get_uptime_ms.cpp

@@ -22,44 +22,24 @@
 
 namespace uuid {
 
-#define UPTIME_OVERFLOW 4294967295 // Uptime overflow value
+// added by proddy, modified
+static uint64_t now_millis = 0;
 
 // returns system uptime in seconds
 uint32_t get_uptime_sec() {
-    static uint32_t last_uptime      = 0;
-    static uint8_t  uptime_overflows = 0;
-
-    if (millis() < last_uptime) {
-        ++uptime_overflows;
-    }
-    last_uptime             = millis();
-    uint32_t uptime_seconds = uptime_overflows * (UPTIME_OVERFLOW / 1000) + (last_uptime / 1000);
-
-    return uptime_seconds;
+    return (uint32_t)(now_millis / 1000ULL);
 }
 
 uint64_t get_uptime_ms() {
-    static uint32_t high_millis = 0;
-    static uint32_t low_millis  = 0;
-
-    if (get_uptime() < low_millis) {
-        high_millis++;
-    }
-
-    low_millis = get_uptime();
-
-    return ((uint64_t)high_millis << 32) | low_millis;
+    return now_millis;;
 }
 
-// added by proddy
-static uint32_t now_millis;
-
 void set_uptime() {
-    now_millis = ::millis();
+    now_millis = esp_timer_get_time() / 1000ULL;
 }
 
 uint32_t get_uptime() {
-    return now_millis;
+    return (uint32_t)now_millis;
 }
 
 } // namespace uuid

lib/uuid-common/src/loop.cpp

@@ -22,7 +22,6 @@ namespace uuid {
 
 void loop() {
     set_uptime(); // added by proddy
-    get_uptime_ms();
 }
 
 } // namespace uuid