[TruePatrick0]

Udało mi się napisać działający kod, tak aby diody led świeciły się po wciśnięciu danego przycisku. Dziękuję za pomoc wszystkim. Umieszczam tutaj działający kod:

Kod:

char msgs[5][15] = {
 "Right Key OK ",
 "Up Key OK    ",
 "Down Key OK  ",
 "Left Key OK  ",
 "Select Key OK" };
char start_msg[15] = {
 "Start loop "};
int  adc_key_val[5] ={
 30, 150, 360, 535, 760 };
int NUM_KEYS = 5;
int adc_key_in;
int key=-1;
int oldkey=-1;
void setup() {
 pinMode(13, OUTPUT);  //we'll use the debug LED to output a heartbeat
 pinMode(12, OUTPUT);
 pinMode(11, OUTPUT);
 Serial.begin(9600);

 /* Print that we made it here */
 Serial.println(start_msg);
}

void loop()
{
 adc_key_in = analogRead(0);    // read the value from the sensor
 digitalWrite(13, HIGH);
 /* get the key */
 key = get_key(adc_key_in);    // convert into key press
 if (key != oldkey) {   // if keypress is detected
   delay(50);      // wait for debounce time
   adc_key_in = analogRead(0);    // read the value from the sensor
   key = get_key(adc_key_in);    // convert into key press
   if (key != oldkey) {
     oldkey = key;
     if (key >=0){

// here is where you know that a button is pushed
// should be a unique number for each button


  Serial.println((String)key);//get the number that represents each button !!!



// do stuff here
if(key == 0){ digitalWrite(11,HIGH);digitalWrite(12,LOW);}
if(key == 1){ digitalWrite(12,HIGH);digitalWrite(11,LOW);}

     }
   }
 }
 digitalWrite(13, LOW);
}
// Convert ADC value to key number
int get_key(unsigned int input)
{
 int k;
 for (k = 0; k < NUM_KEYS; k++)
 {
   if (input < adc_key_val[k])
   {
     return k;
   }
 }
 if (k >= NUM_KEYS)
   k = -1;     // No valid key pressed
 return k;
}