telephone Keypad resistors problem!

Hello guys,

I am trying to figure out how to use a keypad from an old telephone (i need it for an installation) with the keypad tutorial of the arduino playground.. but i am not sure about resistors!

this is the tutorial i am talking about: http://www.arduino.cc/playground/Main/KeypadTutorial

this is my keypad: http://yfrog.com/1q74485607j

this is how i think it works (the red number): http://yfrog.com/11keypadpindiagramj

Any chance of getting this done? Thanks a lot..

Can you help me? thanks a lot

If your numbers are right, the values from Keypad:getKey() will match the buttons that you press.

If not, they won't.

In either case, no harm will be done trying it out. So, try it out.

OK! It works perfectly!
I got the correct values in the serial monitor, for each pin. Now I just need to insert this keypad library inside of my wave shield software for trigger audio.
Any help? THANKS AGAIN

this is my software for the wave shield working with grounded pin

// plays the stdintro menu as long as the receiver is lifted (pin #14 open)

#include <FatReader.h>
#include <SdReader.h>
#include <avr/pgmspace.h>
#include “WaveUtil.h”
#include “WaveHC.h”

SdReader card; // This object holds the information for the card
FatVolume vol; // This holds the information for the partition on the card
FatReader root; // This holds the information for the filesystem on the card
FatReader f; // This holds the information for the file we’re play

WaveHC wave; // This is the only wave (audio) object, since we will only play one at a time

#define DEBOUNCE 4000 // button debouncer

// this handy function will return the number of bytes currently free in RAM, great for debugging!
int freeRam(void)
{
extern int __bss_end;
extern int *__brkval;
int free_memory;
if((int)__brkval == 0) {
free_memory = ((int)&free_memory) - ((int)&__bss_end);
}
else {
free_memory = ((int)&free_memory) - ((int)__brkval);
}
return free_memory;
}

void sdErrorCheck(void)
{
if (!card.errorCode()) return;
putstring("\n\rSD I/O error: “);
Serial.print(card.errorCode(), HEX);
putstring(”, ");
Serial.println(card.errorData(), HEX);
while(1);
}

void setup() {
// set up serial port
Serial.begin(9600);
putstring_nl(“WaveHC with 6 buttons”);

putstring("Free RAM: "); // This can help with debugging, running out of RAM is bad
Serial.println(freeRam()); // if this is under 150 bytes it may spell trouble!

// Set the output pins for the DAC control. This pins are defined in the library
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
pinMode(4, OUTPUT);
pinMode(5, OUTPUT);

// pin13 LED
pinMode(13, OUTPUT);

// enable pull-up resistors on switch pins (analog inputs)
digitalWrite(14, HIGH);
digitalWrite(15, HIGH);
digitalWrite(16, HIGH);
digitalWrite(17, HIGH);
digitalWrite(18, HIGH);
digitalWrite(19, HIGH);

// if (!card.init(true)) { //play with 4 MHz spi if 8MHz isn’t working for you
if (!card.init()) { //play with 8 MHz spi (default faster!)
putstring_nl(“Card init. failed!”); // Something went wrong, lets print out why
sdErrorCheck();
while(1); // then ‘halt’ - do nothing!
}

// enable optimize read - some cards may timeout. Disable if you’re having problems
card.partialBlockRead(true);

// Now we will look for a FAT partition!
uint8_t part;
for (part = 0; part < 5; part++) { // we have up to 5 slots to look in
if (vol.init(card, part))
break; // we found one, lets bail
}
if (part == 5) { // if we ended up not finding one
putstring_nl(“No valid FAT partition!”);
sdErrorCheck(); // Something went wrong, lets print out why
while(1); // then ‘halt’ - do nothing!
}

// Lets tell the user about what we found
putstring(“Using partition “);
Serial.print(part, DEC);
putstring(”, type is FAT”);
Serial.println(vol.fatType(),DEC); // FAT16 or FAT32?

// Try to open the root directory
if (!root.openRoot(vol)) {
putstring_nl(“Can’t open root dir!”); // Something went wrong,
while(1); // then ‘halt’ - do nothing!
}

// Whew! We got past the tough parts.
putstring_nl(“Ready!”);
}

int thetrack = 0;
int playpoem = 0;
int buttonpressed = 0;

// ----------------- LOOP ----------------- LOOP ----------------- LOOP ----------------- LOOP -----------------
void loop() {
putstring_nl(“loop”);

while (digitalRead(14) == HIGH) { // check if the receiver id lifted

buttonpressed = (check_switches());

if (buttonpressed != 0 ) { // if buttons has been pressed
putstring(“button pressed:”); Serial.println(buttonpressed);
if (thetrack == 0) { // check in witch menu we are
putstring_nl(“button pressed on stdintro”);
wave.stop();
thetrack = 1;
}

else if (thetrack == 1) { // check in witch menu we are
putstring_nl(“button pressed on menu”);
playpoem = 1;
switch (buttonpressed) {
case 1:
wave.stop();
thetrack = 2; // plays poem #1 (thetrack -1)
break;
case 2:
wave.stop();
thetrack = 3;
break;
case 3:
wave.stop();
thetrack = 4;
break;
case 4:
wave.stop();
thetrack = 5;
break;
}
}

else { // if we are playing a poem
putstring_nl(“button pressed on poems”);
wave.stop();
thetrack = 0; // torna al menu principale
}
}

if (!wave.isplaying) {
if (thetrack <= 1) {
playtrack (thetrack);
}
else if (thetrack > 1) {
if (playpoem == 0) {
thetrack = 0;
playtrack (thetrack);
}
else if (playpoem == 1) {
playtrack (thetrack);
playpoem = 0;
}
}
}

// playloop (thetrack);
}

putstring_nl(“phoneoff_wave_stopped”);
wave.stop();
}
// ----------------- ENDLOOP -----------------

/*
// Plays a track in loop
void playloop (byte trackID) {
if (!wave.isplaying) {
playtrack (trackID);
}
}
*/

// Translates file index to files name
/*
WAVE FILES INDEX:
0 STDINTRO.WAV
1 MENU.WAV
… add below if needed
*/
void playtrack (byte track) {
switch (track) {
case 0:
playfile(“STDINTRO.WAV”);
break;
case 1:
playfile(“MENU.WAV”);
break;
case 2:
playfile(“POEM1.WAV”);
break;
case 3:
playfile(“POEM2.WAV”);
break;
}
}

// Plays files and print their name
void playfile(char *name) {
// see if the wave object is currently doing something
if (wave.isplaying) {// already playing something, so stop it!
wave.stop(); // stop it
}
// look in the root directory and open the file
if (!f.open(root, name)) {
putstring("Couldn’t open file "); Serial.print(name); return;
}
// OK read the file and turn it into a wave object
if (!wave.create(f)) {
putstring_nl(“Not a valid WAV”); return;
}

// ok time to play! start playback
putstring("Playing file: "); Serial.println(name);
wave.play();
}

int check_switches()
{
static byte previous[5];
static long time[5];
byte reading;
byte pressed;
byte index;
pressed = 0;

for (byte index = 0; index < 5; ++index) {
reading = digitalRead(15 + index);
if (reading == LOW && previous[index] == HIGH && millis() - time[index] > DEBOUNCE)
{
// switch pressed
time[index] = millis();
pressed = index + 1;
break;
}
previous[index] = reading;
}
// return switch number (0 - 5)
return (pressed);
}

and this is the keypad sketch program

/* Keypadtest.pde
*

  • Demonstrate the simplest use of the keypad library.
  • The first step is to connect your keypad to the
  • Arduino using the pin numbers listed below in
  • rowPins and colPins. If you want to use different
  • pins then you can change the numbers below to
  • match your setup.
  • Note: Make sure to use pullup resistors on each of
  • the rowPins.
    */
    #include <Keypad.h>

const byte ROWS = 4; // Four rows
const byte COLS = 3; // Three columns
// Define the Keymap
char keys[ROWS][COLS] = {
{‘1’,‘2’,‘3’},
{‘4’,‘5’,‘6’},
{‘7’,‘8’,‘9’},
{’#’,‘0’,’*’}
};
// Connect keypad ROW0, ROW1, ROW2 and ROW3 to these Arduino pins.
byte rowPins[ROWS] = { 9, 8, 7, 6 };
// Connect keypad COL0, COL1 and COL2 to these Arduino pins.
byte colPins[COLS] = { 12, 11, 10 };

// Create the Keypad
Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

#define ledpin 13

void setup()
{
digitalWrite(ledpin, HIGH);
Serial.begin(9600);
}

void loop()
{
char key = kpd.getKey();
if(key) // same as if(key != NO_KEY)
{
switch (key)
{
case ‘*’:
digitalWrite(ledpin, LOW);
break;
case ‘#’:
digitalWrite(ledpin, HIGH);
break;
default:
Serial.println(key);
}
}
}

Did you ever have any luck using the keypad library with the waveshield?

I have a thread going here: http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1292907026/0