fix timestamps on received packets - #3
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esaulenka wants to merge 1 commit into
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smartgauges
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Feb 14, 2026
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| volatile tick_t tick = { 0, 0, 0, 0, 0, 0 }; | ||
| volatile uint32_t usecs = 0; | ||
| static volatile uint32_t usecs = 1000; |
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this monotonic counter in microseconds increases by 1000 every 1 ms, must be initialized to 0
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| value += (1000 * v) / systick_get_reload(); | ||
| // sysick counts DOWN! | ||
| value -= (1000 * v) / systick_get_reload(); |
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it makes more sense to add a fraction of a millisecond, how do you think?
value += (1000 * (systick_get_reload() - v)) / systick_get_reload();
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Systick - странная штука, внутренний счётчик там считает вниз, от reload value до нуля.
Соответственно, при использовании этого счётчика надо менять его знак.
Проверил на 100% загруженной 500k шине, теперь пакеты имеют корректные таймштампы с разницей 230..250 микросекунд.
Проблема с изменением порядка по-прежнему есть, разбираюсь...