Paso 4: Versión simplificada que no utiliza EEPROM
Si usted está buscando una solución más simple para hacer un menú de selección de un botón y no es necesario preservar la selección durante reajustes o ciclo de alimentación, aquí es con las cosas EEPROM eliminada:
#define NUMSELECTIONS 4 // global variables int currentSelection = 0; boolean button1Pressed = 0; boolean previousButton1Pressed = 0; unsigned long debounceCount; unsigned long blinkMillis; unsigned int blinkInterval; void setup() { pinMode(12, INPUT_PULLUP); pinMode(2, OUTPUT); pinMode(3, OUTPUT); pinMode(4, OUTPUT); pinMode(5, OUTPUT); pinMode(13, OUTPUT); digitalWrite(2, 1); digitalWrite(3, 1); digitalWrite(4, 1); digitalWrite(5, 1); digitalWrite(13, 1); // turn on the LED for the selection digitalWrite(currentSelection + 2, 0); } // end of setup void loop() { // read the button no more often than once every 20 ms, debouncing if (millis() > 20 && debounceCount < millis() - 20) { debounceCount = millis(); button1Pressed = !digitalRead(12); } // if the button has been pressed, increment and store selection if (previousButton1Pressed != button1Pressed) { previousButton1Pressed = button1Pressed; // only take action when button is pressed, not when released if (button1Pressed) { // turn off the LED for the old selection digitalWrite(currentSelection + 2, 1); currentSelection++; currentSelection %= NUMSELECTIONS; // turn on the LED for the new selection digitalWrite(currentSelection + 2, 0); // Serial.print("Current Selection "); // Serial.println(currentSelection); } } // Here in the loop is where we can do different things depending on // what selection was made with the button. // In this case we blink the Arduino on-board LED at different intervals // depending on the selection. // This also demonstrates main loop processing without delay blocking. if (currentSelection == 0) { // Dim the LED by blinking it rapidly, bit-banging PWM if (digitalRead(13)) { blinkInterval = 0; } else { blinkInterval = 10; } } else if (currentSelection == 1) { // Blink once per second blinkInterval = 500; } else if (currentSelection == 2) { // Blink every 2 seconds blinkInterval = 1000; } else if (currentSelection == 3) { // Quick flash every 1.5 seconds, this is also bit-banging PWM, very slow if (digitalRead(13)) { blinkInterval = 50; } else { blinkInterval = 1450; } } if (millis() > blinkInterval && blinkMillis < millis() - blinkInterval) { blinkMillis = millis(); digitalWrite(13, !digitalRead(13)); } } // end of loop
