DFRobotArduino Shields User Manual

Arduino Shields Manual
2010
- 11 -
}
void loop()
{
adc_key_in = analogRead(0); // read the value from the sensor
digitalWrite(13, HIGH);
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){
lcd.cursorTo(2, 0); //line=2, x=0
lcd.printIn(msgs[key]);
}
}
}
digitalWrite(13, LOW);
}
// Convert ADC value to key number
int get_key(unsigned int input)
{ int k;
for (k = 0; k < NUM_KEYS; k++)
{