//Emma Pareschi- Dec 2020
//Modify example from Pressure Sensor Matrix Code
//parsing through a pressure sensor matrix grid by switching individual
//rows/columns to be HIGH, LOW or INPUT (high impedance) to detect
//location and pressure.
//>> https://www.kobakant.at/DIY/?p=7443

#define numRows 2
#define numCols 3
#define sensorPoints numRows*numCols

int rows[] = {A0,A1};
int cols[] = {5,6,7};
int incomingValues[sensorPoints] = {};

void setup() {
// set all rows and columns to INPUT (high impedance):
for (int i = 0; i < numRows; i++) {
  pinMode(rows[i], INPUT_PULLUP);
}
for (int i = 0; i < numCols; i++) {
  pinMode(cols[i], INPUT);
}
  Serial.begin(9600);
}

void loop() {
  
for (int colCount = 0; colCount < numCols; colCount++) {
  pinMode(cols[colCount], OUTPUT); // set as OUTPUT
  digitalWrite(cols[colCount], LOW); // set LOW

  for (int rowCount = 0; rowCount < numRows; rowCount++) {
  incomingValues[colCount * numRows + rowCount] = analogRead(rows[rowCount]); // read INPUT
}// end rowCount

pinMode(cols[colCount], INPUT); // set back to INPUT!

}// end colCount

// Print the incoming values of the grid:
for (int i = 0; i < sensorPoints; i++) {
  
  Serial.print(incomingValues[i]);
  if (i < (sensorPoints-1)) {
    Serial.print("\t");}
//    Serial.println("");}
  }


Serial.println();
delay(10);
}