RTOS/TM4C1294KCPDT: System epoch time is getting wrong

prem kumar76

Part Number: TM4C1294KCPDT
Other Parts Discussed in Thread: SYSBIOS

Tool/software: TI-RTOS

Hi Everyone,

Please refer below code.

#include <ti/sysbios/interfaces/ISeconds.h>
#include <ti/sysbios/hal/Seconds.h>

struct tm* timeBuffer;

Seconds_set(1552641654);

STEP1:
Code:
time_t currTime = time(NULL);
timeBuffer = localtime(&currTime);
char* curTime = asctime(timeBuffer);
System_printf("Previous Time(GMT): %s\n", curTime);
System_flush();

Output:
Previous Time(GMT): Fri Mar 15 09:20:55 2019

STEP2:
Code:
Seconds_getTime(&ts);
struct tm* currTime = localtime(&ts.secs);
char* cTime = asctime(currTime);
System_printf("After Time(GMT): %s\n", cTime);
System_flush();

Output:
After Time(GMT): Tue Mar 15 09:20:55 1949

If i am using Step2 i am getting 70 years difference.

Can anyone please resolve my issue how can i get in both ways same time.

Thanks in advance.

Expecting a quick reply.

over 6 years ago

0 Sean Oliver28 over 6 years ago

TI__Intellectual 1060 points

Hello,

Could you post your TI RTOS .cfg file as well as the SDK version you are using? I am trying to replicate your issue in the meantime.

Thanks,

Sean

0 Sean Oliver28 over 6 years ago

TI__Intellectual 1060 points

Hi, I see the issue now. It turns out our time library works off of 1900 instead of the standard 1970. I'm not exactly sure why that is, I suspect it was a legacy compatibility issue.

So I recommend you stick to STEP1 method, or if you must use STEP2 you will need to add in the 70 year offset either in the seconds you pass in or directly to the tm struct.

Hope that helps, let me know if you have further questions. Thanks,

Sean

0 prem kumar76 over 6 years ago in reply to Sean Oliver28

Prodigy 220 points

Hi,

In TI_RTOS is there any provision to reset nanoseconds?

By using Seconds_getTime(&ts); API we will get both seconds and nanoseconds.

There is a option to set seconds. Like is there any option to reset nanoseconds?

Expecting a quick reply.

Regards,
Prem Kumar.

0 ToddMullanix over 6 years ago in reply to prem kumar76

TI__Guru* 96960 points

Can you please open a new thread as this is a different question?

Arm-based microcontrollers

Arm-based microcontrollers forum

RTOS/TM4C1294KCPDT: System epoch time is getting wrong