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annotate SysTick erratum

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This commit is contained in:
Alex Maestas 2024-01-22 00:31:04 +00:00
parent 83a0e4e992
commit 2ae8f9863b
1 changed files with 2 additions and 1 deletions
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3
watch-library/hardware/watch/watch_deepsleep.c
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@ -160,7 +160,8 @@ void watch_enter_sleep_mode(void) {
// disable brownout detector interrupt, which could inadvertently wake us up. // disable brownout detector interrupt, which could inadvertently wake us up.
SUPC->INTENCLR.bit.BOD33DET = 1; SUPC->INTENCLR.bit.BOD33DET = 1;
// work around a silicon erratum by disabling the SysTick interrupt, which is // per Microchip datasheet clarification DS80000782,
// work around silicon erratum 1.8.4 by disabling the SysTick interrupt, which is
// enabled as part of driver init, before going to sleep. // enabled as part of driver init, before going to sleep.
SysTick->CTRL = SysTick->CTRL & ~(CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos); SysTick->CTRL = SysTick->CTRL & ~(CONF_SYSTICK_TICKINT << SysTick_CTRL_TICKINT_Pos);