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code cleanup 3: add note about timer wrap and use increment operator

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mcudev 2017-10-15 08:33:33 -04:00 committed by Pavol Rusnak
parent a1c33e32f0
commit e4aec8f302
1 changed files with 3 additions and 1 deletions
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4
embed/trezorhal/stm32.c
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@ -45,5 +45,7 @@ volatile uint32_t uwTick = 0;
void SysTick_Handler(void)
{
uwTick += 1;
// this is a millisecond tick counter that wraps after approximately
// 49.71 days = (0xffffffff / (24 * 60 * 60 * 1000))
uwTick++;
}