The timestamp mechanism is required in the SimpleLink host driver. This timestamp is used to determine a timeout when the network processor does not respond.

This example uses the FreeRTOS APIs to get the tick period and the current tick count in order to calculate a timestamp.

user.h:

#define SL_TIMESTAMP_TICKS_IN_10_MILLISECONDS (10000 / ClockP_getSystemTickPeriod())
#define slcb_GetTimestamp TimerGetCurrentTimestamp

cc_pal.c:

uint32_t ClockP_getSystemTickPeriod()
{
    uint32_t tickPeriodUs;

    /*
     *  Tick period in microseconds. configTICK_RATE_HZ is defined in the
     *  application's FreeRTOSConfig.h, which is include by FreeRTOS.h
     */
    tickPeriodUs = 1000000 / configTICK_RATE_HZ;

    return tickPeriodUs;
}

unsigned long TimerGetCurrentTimestamp()
{
    return ((uint32_t)xTaskGetTickCount());
}