This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

MSP430F6720: possible to use 64 bit time_t as in MSP432 series MCU?

Part Number: MSP430F6720
Other Parts Discussed in Thread: MSP430F6736


I am trying to proof a product for Y2038 problem, found out that TI compiler as of v20.2.4 still uses 32bit/4byte time_t

The following is test code for mktime():

struct tm calendarTime;
calendarTime.tm_year = RTCYEAR - 1970;
calendarTime.tm_mon = RTCMON - 1;
calendarTime.tm_mday = RTCDAY;
calendarTime.tm_hour = RTCHOUR;
calendarTime.tm_min = RTCMIN;
calendarTime.tm_sec = RTCSEC;
time_t seconds = mktime(&calendarTime);
uint8_t debugInfo[48];
sprintf(debugInfo, "time_t size = %d, seconds = %010lu", sizeof(time_t), seconds);
printDebugInfo(debugInfo, 38);  // output to console via UART

I get the following output in console:

2021-04-19 18:52:55, time_t size = 4, seconds = 1618771975 // Unix epoch time since 1970-01-01 00:00:00

As mentioned in another post, time_t can be changed to 64bit for MSP432 series MCU. Can we do this for MSP430 as well?