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Smart Bluetooth

Anonymous
Not applicable

Continuation of this thread: More appFineTimer questions...

I saw 12.5 ms in the comment above bleprofile_regTimerCb() function and it confused me.

If I set fine_timer_interval as 12, what will be the actual interval? 12 or 12.5 ms?

If I really want the interval to be 12.5 to make it perfectly fit in every 1 second, how can I config it?

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1 Solution
Anonymous
Not applicable

Hi JT,

Because fine_timer_interval is UINT16, 12.5 will not fit in the variable.

I've tested the length of one fine interval using bleapputils_currentNativeBtClk and bleapputils_BtClksSince.

I have found that the interval will always be floored to multiple of 12.5 ms.

For example,

If the value of fine_timer_interval is in the range of 1 - 24, the actual interval will be 12.5 ms.

For the range of 25 - 37, the actual interval will be 25 ms.

For the range of 38 - 49, the actual interval will be 37.5 ms.

This is a bit tricky. If you put 37.5 in the fine_timer_interval. The actual interval you get will be 25 ms.

Thanks,

Koon

View solution in original post

2 Replies
Anonymous
Not applicable

Hello Prayook,

Which value have you tried - 12 or 12.5?

Thanks

JT

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Anonymous
Not applicable

Hi JT,

Because fine_timer_interval is UINT16, 12.5 will not fit in the variable.

I've tested the length of one fine interval using bleapputils_currentNativeBtClk and bleapputils_BtClksSince.

I have found that the interval will always be floored to multiple of 12.5 ms.

For example,

If the value of fine_timer_interval is in the range of 1 - 24, the actual interval will be 12.5 ms.

For the range of 25 - 37, the actual interval will be 25 ms.

For the range of 38 - 49, the actual interval will be 37.5 ms.

This is a bit tricky. If you put 37.5 in the fine_timer_interval. The actual interval you get will be 25 ms.

Thanks,

Koon

View solution in original post