43 lines
985 B
C++
43 lines
985 B
C++
#include <RocketScream_LowPowerAVRZero.h>
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/* Example on a 32-pin ATMega4808, LED on pin D7 */
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const uint8_t unusedPins[] = {0, 1, 3, 4, 5, 6, 8, 9, 10, 11, 12, 13,
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14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25};
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volatile bool awake = false;
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void setup()
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{
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uint8_t index;
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/* Ensure unused pins are not floating */
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for (index = 0; index < sizeof(unusedPins); index++)
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{
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pinMode(unusedPins[index], INPUT_PULLUP);
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LowPower.disablePinISC(unusedPins[index]);
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}
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/* LED is connected to D7 */
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pinMode(LED_BUILTIN, OUTPUT);
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pinMode(2, INPUT_PULLUP);
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digitalWrite(LED_BUILTIN, LOW);
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/* Only asynchronous input pin can be used as wake up source during power */
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/* down. Pin D2, D6, D14, D16, D18, D22 on 32-pin ATMega4808 */
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attachInterrupt(2, wakeUp, LOW);
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}
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void loop()
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{
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LowPower.powerDown();
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if (awake)
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{
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awake = false;
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digitalWrite(LED_BUILTIN, CHANGE);
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}
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}
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void wakeUp(void)
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{
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awake = true;
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}
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