Incrementing Motor Speed Control

//Incrementing Motor Speed Control 一開始motor=9 const int MOTOR = 9; //Motor connected to digital pin 9 const int BUTTON = 2; //Button connected to pin 2 boolean lastButton = LOW; //Variable containing the previous //button state boolean currentButton = LOW; //Variable containing the current //button state int speedIncrement = 0; void setup() { pinMode (MOTOR, OUTPUT); //Set the MOTOR pin as an output pinMode (BUTTON, INPUT); //Set button as an input } /* * Debouncing Funtion * Pass it the previous button state, * and get back the current debounced button state. */ boolean debounce(boolean last) { boolean current = digitalRead(BUTTON); //Read the button state if (last != current) //if it's different { delay(5); //wait 5ms current = digitalRead(BUTTON); //read it again } return current; } /* *Motor Speed Selection *Pass a number for the Motor speed and set it */ void setSpeed(int increment) { //speed one if (increment == 1) { analogWrite(MOTOR, 110); } else if (increment == 2) { analogWrite(MOTOR, 150); } else if (increment == 3) { analogWrite(MOTOR, 180); } else if (increment == 4) { analogWrite(MOTOR, 200); } else if (increment == 5) { analogWrite(MOTOR, 255); } //OFF else { analogWrite(MOTOR, 0); } } void loop() { currentButton = debounce(lastButton); //read debounce state
&&:且為兩個條件組合起來 if (lastButton == LOW && currentButton == HIGH) //if it was pressed { speedIncrement++; //Increment motor speed } lastButton = currentButton; //reset button value //if cycled through all speed increments //reset the speed to 0 if (speedIncrement == 6) speedIncrement = 0; setSpeed(speedIncrement); }