CCS/CC2642R: The mktime() function and __TI_TIME_USES_64 build

Hi Daniel,

So what you get is compiler specific. The TI ARM does not give you a 64 bit implementation that link to the RTC like the case for 32-bits (as far as I can figure out). If you used the clang compiler, there seems to be one.

Either way, you want the function to be bound to the RTC clock of the device (the "Seconds" HAL of TI-RTOS interface with this which is why the 32-bit version uses this). To this you manually want to add the offset to get the epoch right (you could see that the 32-bit version should be doing this if "__ti__" is defined.

I took an generic example from the 4.20 SDK and ran a test with __TI_TIME_USES_64=1 set in the project to get the time() to redirect to the 64-bit version. But as I'm using TI ARM, I get redirected to a HOST version which is not what you want. In that case you could override the function yourself and fill in the logic needed to get the result you need from the clock source you want:

/*
 *  ======== time ========
 */
__time64_t __attribute__ ((used)) __time64(time_t *tout)
{
    uint32_t t;

    /* Get time using fro example Seconds_get() */

#if defined(__ti__)
    /*
     *  TI time() function returns seconds since 1900, so add the number
     *  of seconds from 1900 to 1970 (2208988800).
     */
    t += 2208988800;
#endif

    if (tout) {
        *tout = t;
    }

    return (t);
}