CODEWITHSUNDEEP
arduinokeypadpins
carlos lopez
carlos lopez

Reputation: 25

Arduino keypad pins

I've been recently working with an Arduino - trying to develop a program. The program should find which pins a keypad button is connected to in order for it to be easier to use libraries such as "keypad". I don't need to use a multimeter.

I'm currently working with a Megarduino and an LCD keypad shield.

This is the code that I have for scanning the keypad pins connected to the Arduino but I can't make it work.

There is previously a pin object array that has 9 pins with the following attributes: arduinoPin, scannedPin, basePin

for (int kpdBasePin=2; kpdBasePin<NUMPINS; kpdBasePin++)
{
    scanPins(kpdBasePin);    // scan all pins less than kpdBasePin.
}

void scanPins(int baseKpdPin)
{
    // Set base_pin output to LOW to begin scan process.
    int base = kpdPin[baseKpdPin].arduinoPin;
    pinMode(base, OUTPUT);
    digitalWrite(base, LOW);

    // Scan all pins up to, but not including, the base_pin. A LOW indicates a
    // key is being pressed.
    for (int scannedKpdPin = 1; scannedKpdPin < baseKpdPin; scannedKpdPin++)
    { 
        // Created a local variable for readability.
        int arduinoPin = kpdPin[scannedKpdPin].arduinoPin;
        int keyState = !digitalRead(arduinoPin);

        if (keyState)
        {
            storePins(scannedKpdPin, base);    //method to store both pins
        }
    }

    // End pin scanning process.
    digitalWrite(base, HIGH);
    pinMode(base, INPUT_PULLUP);
}

Is there something wrong with this code?

Upvotes: 1

Views: 223

Answers (0)

Related Questions