4x17 Matrix

[Chrigu Wuethrich]

Hi i have a Board with 4x16 Matrix and an Arduino Mega 2560. Now i have changed the config to 4x17 that i also can use the Buttons.
Btn1 pin 2 to 39
Btn2 pin 3 to 39
Btn3 pin 4 to 39
If you want you can add the configuration to the source
cheers
chrigu

/*#include <Keypad.h>
*/
const byte numRows = 4; //four rows
const byte numCols = 17; //four columns
const int debounceTime = 100;//20 works better than great !
//define the cymbols on the buttons of the keypads
char keymap[numRows][numCols] = {
{'0','1','2','3','4','5','6','7','8','9','*','B','C','D','E','F','G'},
{'a','b','c','d','e','f','g','h','i','?','K','L','M','N','O','P','Q'},
{'j','k','l','m','n','o','p','q','r','&','T','U','V','W','X','Y','Z'},
{'s','t','u','v','w','x','y','z','A','@','+','-',']','/','!','$','H'}
};
byte rowPins[numRows] = {2, 3, 4, 5}; //connect to the row pinouts of the keypad
byte colPins[numCols] = {22, 23, 24, 25, 26, 27 ,28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 39}; //connect to the column pinouts of the keypad

//initialize an instance of class NewKeypad
/*Keypad customKeypad = Keypad( makeKeymap(Keys), rowPins, colPins, ROWS, COLS);
*/
void setup()
{
Serial.begin(9600);
for (int row = 0; row < numRows; row++)
{
pinMode(rowPins[row],INPUT); // Set row pins as input
digitalWrite(rowPins[row],HIGH); // turn on Pull-ups
}
for (int column = 0; column < numCols; column++)
{
pinMode(colPins[column],OUTPUT); // Set column pins as outputs
// for writing
digitalWrite(colPins[column],HIGH); // Make all columns inactive
}
}

void loop()
{
char key = getKey();
if( key != 0) { // if the character is not 0 then
// it's a valid key press
/*Serial.print("Got key ");*/
Serial.print(key);
}
}

// returns with the key pressed, or 0 if no key is pressed
char getKey()
{
char key = 0; // 0 indicates no key pressed

for(int column = 0; column < numCols; column++)
{
digitalWrite(colPins[column],LOW); // Activate the current column.
for(int row = 0; row < numRows; row++) // Scan all rows for
// a key press.
{
if(digitalRead(rowPins[row]) == LOW) // Is a key pressed?
{
delay(debounceTime); // debounce
while(digitalRead(rowPins[row]) == LOW)
; // wait for key to be released
key = keymap[row][column]; // Remember which key
// was pressed.
}
}
digitalWrite(colPins[column],HIGH); // De-activate the current column.
}
return key; // returns the key pressed or 0 if none
}

[diego]

hi,
you have 2 characters 'A' in your ligne/column matrix...

[Chrigu Wuethrich]

thx diego
i have changed one to H

[poilou]

HI Chrigu,
Please include your code in the "code" tags, I suspect that the file is not properly displayed in the message above.