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Replace rounded div macro

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mark9064 2024-08-23 11:25:54 +01:00 committed by JF
parent f032847ae1
commit 771008495e
1 changed files with 5 additions and 2 deletions
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7
src/displayapp/DisplayApp.cpp
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@ -159,8 +159,11 @@ void DisplayApp::InitHw() {
TickType_t DisplayApp::CalculateSleepTime() {
TickType_t ticksElapsed = xTaskGetTickCount() - alwaysOnStartTime;
// Divide both the numerator and denominator by 8 to increase the number of ticks (frames) before the overflow tick is reached
TickType_t elapsedTarget = ROUNDED_DIV((configTICK_RATE_HZ / 8) * alwaysOnTickCount * alwaysOnRefreshPeriod, 1000 / 8);
// ROUNDED_DIV overflows when numerator + (denominator floordiv 2) > uint32 max
auto RoundedDiv = [](uint32_t a, uint32_t b) {
return ((a + (b / 2)) / b);
};
TickType_t elapsedTarget = RoundedDiv((configTICK_RATE_HZ / 8) * alwaysOnTickCount * alwaysOnRefreshPeriod, 1000 / 8);
// RoundedDiv overflows when numerator + (denominator floordiv 2) > uint32 max
// in this case around 9 hours
constexpr TickType_t overflowTick = (UINT32_MAX - (1000 / 16)) / ((configTICK_RATE_HZ / 8) * alwaysOnRefreshPeriod);