Fixed version

Integrated ATTiny13/13A/25/45/85

Simple_Push_Button_ON_OFF/Simple_Push_Button_ON_OFF.ino

@@ -0,0 +1,76 @@
+#include <avr/sleep.h>
+#include <avr/interrupt.h>
+#include <avr/power.h>
+
+const int buttonPin = PB3; // Change to your actual button pin
+const int powerPin = PB4;  // Change to your actual power control pin
+
+volatile bool powerState = false;
+
+void setup() {
+  // Set all unused pins to output to avoid floating inputs
+  DDRB = 0xFF;
+  PORTB = 0x00;
+
+  // Set button pin as input without pull-up resistor
+  pinMode(buttonPin, INPUT);
+
+  // Disable pull-up resistor to save power
+  PORTB &= ~(1 << buttonPin);
+
+  pinMode(powerPin, OUTPUT);
+  digitalWrite(powerPin, powerState); // Start with power off
+
+  // Disable ADC to save power
+  ADCSRA &= ~(1 << ADEN);
+
+  // Disable Analog Comparator to save power
+  ACSR |= (1 << ACD);
+
+  // Set up Pin Change Interrupt
+  GIMSK |= (1 << PCIE); // Enable Pin Change Interrupts
+  PCMSK |= (1 << PCINT3); // Use PB3 as interrupt pin
+  sei(); // Enable global interrupts
+}
+
+void loop() {
+  if (!powerState) {
+    // Device is off, enter sleep mode
+    goToSleep();
+  }
+}
+
+void goToSleep() {
+  set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+  sleep_enable();
+  sleep_bod_disable(); // Disable Brown-Out Detection to save power
+  sei(); // Ensure interrupts are enabled so we wake up again
+  sleep_cpu(); // Go to sleep
+  sleep_disable(); // Wake up here
+}
+
+ISR(PCINT0_vect) {
+  // Ensure button is pressed and debounce it
+  if (digitalRead(buttonPin) == LOW && debounceButton()) {
+    powerState = !powerState; // Toggle power state
+    digitalWrite(powerPin, powerState); // Apply new power state
+  }
+}
+
+bool debounceButton() {
+  // Wait for button to stabilize
+  delay(10);
+
+  // Check button state again
+  return digitalRead(buttonPin) == LOW;
+}
+
+EMPTY_INTERRUPT(WDT_vect); // Disable Watchdog Timer interrupt
+EMPTY_INTERRUPT(TIM0_COMPA_vect); // Disable Timer0 Compare Match A interrupt
+EMPTY_INTERRUPT(TIM0_COMPB_vect); // Disable Timer0 Compare Match B interrupt
+EMPTY_INTERRUPT(TIM0_OVF_vect); // Disable Timer0 Overflow interrupt
+EMPTY_INTERRUPT(TIM1_COMPA_vect); // Disable Timer1 Compare Match A interrupt
+EMPTY_INTERRUPT(TIM1_COMPB_vect); // Disable Timer1 Compare Match B interrupt
+EMPTY_INTERRUPT(TIM1_OVF_vect); // Disable Timer1 Overflow interrupt
+EMPTY_INTERRUPT(TIM1_CAPT_vect); // Disable Timer1 Capture Event interrupt
+EMPTY_INTERRUPT(ANA_COMP_vect); // Disable Analog Comparator interrupt