Converting matrix key input to midi note numbers
I have each key showing a value in serial monitor by printing the variable (keypadkeys) and have mapped my Midi note numbers into 'keyToMidiMap'.
how would I go about assigning the correct midi note number to the value I get (keypadkeys) from the matrix keyboard?
#include <Keypad.h>
//#include <Wire.h> //Include the Wire library to talk I2C
//number of rows on the keypad
//number of columns on the keypad
const byte numRows= 6;
const byte numCols= 9;
byte keyToMidiMap[32];
//Code that shows the the keypad connections to the arduino terminals
byte colPins[numCols] = {2, 3, 4, 5, 6, 7, 8, 9, 10}; //Rows 0 to 3
byte rowPins[numRows]= {A0, A1, A2, A3, A4, A5}; //Columns 0 to 3
/*keymap defines the key pressed according to the row and columns just as appears on the keypad*/
char keymap[numRows][numCols]=
{
{'A', 'G','M','S','Y','5','37','43','49'},
{'B', 'H','N','T','Z','6','38','44'},
{'C', 'I','O','U','1','7','39','45'},
{'D', 'J','P','V','2','8','40','46'},
{'E', 'K','Q','W','3','9','41','47'},
{'F', 'L','R','X','4','1','42','48'},
};
//initializes an instance of the Keypad class
Keypad myKeypad= Keypad(makeKeymap(keymap), rowPins, colPins, numRows, numCols);
void setup()
{
// initialize the serial communication:
Serial.begin(115200);
// Map scan matrix buttons/keys to actual Midi note number. Lowest num 41 corresponds to F MIDI note.
keyToMidiMap[1] = 41;
keyToMidiMap[2] = 42;
keyToMidiMap[3] = 43;
keyToMidiMap[4] = 44;
keyToMidiMap[5] = 45;
keyToMidiMap[6] = 46;
keyToMidiMap[7] = 47;
keyToMidiMap[8] = 56;
keyToMidiMap[1 + 8] = 49;
keyToMidiMap[2 + 8] = 50;
keyToMidiMap[3 + 8] = 51;
keyToMidiMap[4 + 8] = 52;
keyToMidiMap[5 + 8] = 53;
keyToMidiMap[6 + 8] = 54;
keyToMidiMap[7 + 8] = 55;
keyToMidiMap[16] = 64;
keyToMidiMap[1 + 16] = 57;
keyToMidiMap[2 + 16] = 58;
keyToMidiMap[3 + 16] = 59;
keyToMidiMap[4 + 16] = 60;
keyToMidiMap[5 + 16] = 61;
keyToMidiMap[6 + 16] = 62;
keyToMidiMap[7 + 16] = 63;
keyToMidiMap[24] = 72;
keyToMidiMap[1 + 24] = 65;
keyToMidiMap[2 + 24] = 66;
keyToMidiMap[3 + 24] = 67;
keyToMidiMap[4 + 24] = 68;
keyToMidiMap[5 + 24] = 69;
keyToMidiMap[6 + 24] = 70;
keyToMidiMap[7 + 24] = 71;
}
//If key is pressed, this key is stored in keypressed variable
//If key is not equal to NO_KEY, then this key is printed out
//if count=17, then count is reset back to 0 (this means no key is pressed during the whole keypad scan process
void loop()
{
char keypadkeys = myKeypad.getKey();
if (keypadkeys != NO_KEY)
{
Serial.print(keypadkeys);
}
}
void noteOn(int cmd, int pitch, int velocity) {
Serial.write(cmd);
Serial.write(pitch);
Serial.write(velocity);
}
should be :