open62541/arch/freertosLWIP/ua_clock.c

/* This work is licensed under a Creative Commons CCZero 1.0 Universal License.
 * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. 
 *
 *    Copyright 2016-2017 (c) Julius Pfrommer, Fraunhofer IOSB
 *    Copyright 2017 (c) Stefan Profanter, fortiss GmbH
 *    Copyright 2017 (c) Thomas Stalder
 */

#ifdef UA_ARCHITECTURE_FREERTOSLWIP

#include "ua_types.h"
#include <task.h>

/* The current time in UTC time */
UA_DateTime UA_DateTime_now(void) {
  UA_DateTime microSeconds = ((UA_DateTime)xTaskGetTickCount()) * (1000000 / configTICK_RATE_HZ);
  return ((microSeconds / 1000000) * UA_DATETIME_SEC) + ((microSeconds % 1000000) * UA_DATETIME_USEC) + UA_DATETIME_UNIX_EPOCH;
}

/* Offset between local time and UTC time */
UA_Int64 UA_DateTime_localTimeUtcOffset(void) {
  return 0; //TODO: this is set to zero since UA_DateTime_now() is just the local time, and not UTC.
}

/* CPU clock invariant to system time changes. Use only to measure durations,
 * not absolute time. */
UA_DateTime UA_DateTime_nowMonotonic(void) {
  return (((UA_DateTime)xTaskGetTickCount()) * 1000 / configTICK_RATE_HZ) * UA_DATETIME_MSEC;
}

#endif /* UA_ARCHITECTURE_FREERTOSLWIP */