int8_t hwSleep(uint8_t interrupt1, uint8_t mode1, uint8_t interrupt2, uint8_t mode2, unsigned long ms) {
// Disable interrupts until going to sleep, otherwise interrupts occurring between attachInterrupt()
// and sleep might cause the ATMega to not wakeup from sleep as interrupt has already be handled!
cli();
// attach interrupts
_wakeUp1Interrupt = interrupt1;
_wakeUp2Interrupt = interrupt2;
if (interrupt1 != INVALID_INTERRUPT_NUM) attachInterrupt(interrupt1, wakeUp1, mode1);
if (interrupt2 != INVALID_INTERRUPT_NUM) attachInterrupt(interrupt2, wakeUp2, mode2);
if (ms>0) {
// sleep for defined time
hwInternalSleep(ms);
} else {
// sleep until ext interrupt triggered
hwPowerDown(SLEEP_FOREVER);
}
// Assure any interrupts attached, will get detached when they did not occur.
if (interrupt1 != INVALID_INTERRUPT_NUM) detachInterrupt(interrupt1);
if (interrupt2 != INVALID_INTERRUPT_NUM) detachInterrupt(interrupt2);
// Return what woke the mcu.
int8_t ret = MY_WAKE_UP_BY_TIMER; // default: no interrupt triggered, timer wake up
if (interruptWakeUp()) ret = static_cast<int8_t>(_wokeUpByInterrupt);
// Clear woke-up-by-interrupt flag, so next sleeps won't return immediately.
_wokeUpByInterrupt = INVALID_INTERRUPT_NUM;
return ret;
}
int8_t hwSleep(const uint8_t interrupt1, const uint8_t mode1, const uint8_t interrupt2,
const uint8_t mode2,
uint32_t ms)
{
// ATMega328P supports following modes to wake from sleep: LOW, CHANGE, RISING, FALLING
// Datasheet states only LOW can be used with INT0/1 to wake from sleep, which is incorrect.
// Ref: http://gammon.com.au/interrupts
// Disable interrupts until going to sleep, otherwise interrupts occurring between attachInterrupt()
// and sleep might cause the ATMega to not wakeup from sleep as interrupt has already be handled!
cli();
// attach interrupts
_wakeUp1Interrupt = interrupt1;
_wakeUp2Interrupt = interrupt2;
// Attach external interrupt handlers, and clear any pending interrupt flag
// to prevent waking immediately again.
// Ref: https://forum.arduino.cc/index.php?topic=59217.0
if (interrupt1 != INVALID_INTERRUPT_NUM) {
clearPendingInterrupt(interrupt1);
attachInterrupt(interrupt1, wakeUp1, mode1);
}
if (interrupt2 != INVALID_INTERRUPT_NUM) {
clearPendingInterrupt(interrupt2);
attachInterrupt(interrupt2, wakeUp2, mode2);
}
if (ms > 0u) {
// sleep for defined time
hwInternalSleep(ms);
} else {
// sleep until ext interrupt triggered
hwPowerDown(WDTO_SLEEP_FOREVER);
}
// Assure any interrupts attached, will get detached when they did not occur.
if (interrupt1 != INVALID_INTERRUPT_NUM) {
detachInterrupt(interrupt1);
}
if (interrupt2 != INVALID_INTERRUPT_NUM) {
detachInterrupt(interrupt2);
}
// Return what woke the mcu.
// Default: no interrupt triggered, timer wake up
int8_t ret = MY_WAKE_UP_BY_TIMER;
if (interruptWakeUp()) {
ret = static_cast<int8_t>(_wokeUpByInterrupt);
}
// Clear woke-up-by-interrupt flag, so next sleeps won't return immediately.
_wokeUpByInterrupt = INVALID_INTERRUPT_NUM;
return ret;
}
int8_t hwSleep(uint32_t ms)
{
// Return what woke the mcu.
// Default: no interrupt triggered, timer wake up
int8_t ret = MY_WAKE_UP_BY_TIMER;
if (ms > 0u) {
// sleep for defined time
hwInternalSleep(ms);
} else {
// sleep until ext interrupt triggered
hwPowerDown(WDTO_SLEEP_FOREVER);
}
if (interruptWakeUp()) {
ret = static_cast<int8_t>(_wokeUpByInterrupt);
}
// Clear woke-up-by-interrupt flag, so next sleeps won't return immediately.
_wokeUpByInterrupt = INVALID_INTERRUPT_NUM;
return ret;
}
int8_t hwSleep(unsigned long ms)
{
hwInternalSleep(ms);
return MY_WAKE_UP_BY_TIMER;
}
