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jessebraham avatar jessebraham commented on July 28, 2024

Just as a note there is also the fugit_timer package which has its own Timer trait which can be implemented. Not sure how useful this is in practice, however.

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jessebraham avatar jessebraham commented on July 28, 2024

Is there actually a way to configure the timer tick rate other than simply selecting the clock and divider values? The only fields I'm really seeing for configuration in this regard are:

  • TIMG_T0_USE_XTAL - 1: Use XTAL_CLK as the source clock of timer group. 0: Use APB_CLK as the source clock of timer group. (R/W) [Default: 0]
  • TIMG_T0_DIVIDER - Timer 0 clock (T0_clk) prescaler value. (R/W) [Default: 1]

Not seeing any other relevant inputs in the block diagram either:

Screen Shot 2022-06-28 at 13 36 26

If these are the fields that you were referring to please let me know, but I don't believe the clock configuration is required at all.

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bjoernQ avatar bjoernQ commented on July 28, 2024

Yes, I think that is all that can be configured about the clock rate.

My idea was just to not use type Time = u64; but have Time a fugit duration type. Since in user code it's not clear what a tick is actually (and can be different in different configurations). So, we probably also need to take a reference to the frozen clocks in the new constructor.

There is also load_alarm_value but I think that is okay to be timer-ticks. Maybe we should add a comment there about that, then.

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