RTOS/CC2538: RTC timer showing wrong time

chethan sv

Expert 1040 points

Part Number: CC2538
Other Parts Discussed in Thread: Z-STACK

Tool/software: TI-RTOS

Hi,

I'm using Zstack-3.0. RTC getting Problem. But still, some 15 to 20 sec vary is there.

// When I'm setting the time.

osal_setClock(time);

osalTimeUpdate();

//When I'm getting the time.

osalTimeUpdate();

RTCTime = osal_getClock();

over 6 years ago

0 YiKai Chen over 6 years ago

Guru 735475 points

Make sure your 32K crystal is accurate and you might need to do calibration in your application.

0 Ryan Brown1 over 6 years ago

TI__Guru**** 207107 points

Hi chethan,

Are you using a TI EVM? How long is your sampling time? Time update functionality is built into the Z-Stack 3.0 CC2538 ZNP solution, as can be seen in the OSAL.c, OSAL_ZNP.c, and MT_SYS.c so I would suggest you use this as an example.

Regards,
Ryan

0 chethan sv over 6 years ago in reply to Ryan Brown1

Expert 1040 points

Hi Ryan Brown1,

where I can see the sampling rate.

0 Ryan Brown1 over 6 years ago in reply to chethan sv

TI__Guru**** 207107 points

I'm actually requesting the total amount of time for which you notice the 15-20 second variance.

Regards,
Ryan

0 Ryan Brown1 over 6 years ago in reply to Ryan Brown1

TI__Guru**** 207107 points

chethan,

Have you resolved this issue or do you have more information to provide?

Regards,
Ryan

0 chethan sv over 6 years ago in reply to Ryan Brown1

Expert 1040 points

I have still doubt about this. What is the actual way to set and get the time?

Because osalTimeUpdate(); is for only ICALL. I think in my project I'm not using ICALL.

If I use this code means woking fine

//TO SET TIME

osal_setClock(time);

//TO GET TIME

RTCTime = osal_getClock();

If i use this means wrong time it is showing

//TO SET TIME

osal_setClock(time);

osalTimeUpdate();

//TO GET TIME

osalTimeUpdate();

RTCTime = osal_getClock();

what is the correct method of using?

0 Ryan Brown1 over 6 years ago in reply to chethan sv

TI__Guru**** 207107 points

osalTimeUpdate is not only for ICALL. Your code does not use ICALL. If the code works then what is the question?

Regards,
Ryan

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RTOS/CC2538: RTC timer showing wrong time