Arduino Leonardo emoji keypad

Program Arduino Leonardo and keypad to make a customized emoji keyboard

Jul 29, 2021

•

3531 views

•

0 respects

keypad

emoji

leonardo

Components and supplies

Arduino Leonardo

SparkFun Qwiic Keypad - 12 Button

Apps and platforms

Arduino IDE

Project description

Code

code

c_cpp

upload this from Arduino ide to your Leonardo

1// this is a simple code for an emoji keyboard with an 
2//arduino leonardo   or micro. this cannot be done with an uno
3#include <Keyboard.h>
4// Pins 1-7   of the keypad connected to the Arduino respectively:
5int keypadPins[7] = {2,   3, 4, 5, 6, 7, 8};
6int keypadStatus;  // Used to monitor which buttons are pressed.
7int   timeout;  // timeout variable used in loop
8
9void setup()
10{
11  for (int   i=0; i<7; i++)
12  {
13    pinMode(keypadPins[i], INPUT);  // Set all keypad pins   as inputs
14    digitalWrite(keypadPins[i], HIGH);  // pull all keypad pins high
15   }
16}
17
18void loop()
19{
20  keypadStatus = getKeypadStatus();  // read   which buttons are pressed
21  if (keypadStatus != 0)  // If a button is pressed   go into here
22  {
23    sendKeyPress(keypadStatus);  // send the button over   USB
24    timeout = 2000;  // top of the repeat delay
25    while ((getKeypadStatus()   == keypadStatus) && (--timeout))  // Decrement timeout and check if key is being   held down
26      delayMicroseconds(1);
27    while (getKeypadStatus() == keypadStatus)   // while the same button is held down
28    {
29      sendKeyPress(keypadStatus);   // continue to send the button over USB
30      delay(50);  // 50ms repeat rate
31     }
32  }
33}
34
35/* sendKeyPress(int key): This function sends a single   key over USB
36   It requires an int, of which the 12 LSbs are used. Each bit in
37    key represents a single button on the keypad.
38   This function will only send   a key press if a single button
39   is being pressed */
40void sendKeyPress(int   key)
41{
42  switch(key)
43  {
44    case 1:  // 0x001
45      Keyboard.write('\U0001F600');   //the emojis can be changed to whatever you want
46      break;
47    case 2:   // 0x002
48      Keyboard.write('\U0001F601');
49      break;
50    case 4:   // 0x004
51      Keyboard.write('\U0001F602�');
52      break;
53    case 8:   // 0x008
54      Keyboard.write('\U0001F923');
55      break;
56    case 16:   // 0x010
57      Keyboard.write('\U0001F603');
58      break;
59    case 32:   // 0x020
60      Keyboard.write('\U0001F604');
61      break;
62    case 64:   // 0x040
63      Keyboard.write('\U0001F605');
64      break;
65    case 128:   // 0x080
66      Keyboard.write('\U0001F606');
67      break;
68    case 256:   // 0x100
69      Keyboard.write('\U0001F609');
70      break;
71    case 512:   // 0x200
72      Keyboard.write('\U0001F60A');
73      break;
74    case 1024:   // 0x400
75      Keyboard.write('\U0001F60E');  
76      break;
77    case   2048:  // 0x800
78      Keyboard.press(KEY_HOME);
79      Keyboard.write('.');
80       Keyboard.release(KEY_HOME);// Sends the 'windows period' command
81      break;
82       
83  }
84}
85
86
87int getKeypadStatus()
88{
89  int rowPins[4] = {keypadPins[2],   keypadPins[6], keypadPins[5], keypadPins[0]};  // row pins are 2, 7, 6, and 1 of   the keypad
90  int columnPins[3] = {keypadPins[1], keypadPins[3], keypadPins[4]};   // column pins are pins 2, 4, and 5 of the keypad
91  int keypadStatus = 0;  //   this will be what's returned
92  
93  /* initialize all pins, inputs w/ pull-ups   */
94  for (int i=0; i<7; i++)
95  {
96    pinMode(keypadPins[i], INPUT);
97     digitalWrite(keypadPins[i], HIGH);
98  }
99  
100  for (int row=0; row<4;   row++)
101  {  // initial for loop to check all 4 rows
102    pinMode(rowPins[row],   OUTPUT);  // set the row pin as an output
103    digitalWrite(rowPins[row], LOW);   // pull the row pins low
104    for (int col=0; col<3; col++)
105    {  // embedded   for loop to check all 3 columns of each row
106      if (!digitalRead(columnPins[col]))
107       {
108        keypadStatus |= 1 << ((row+1)*3 + (col+1) - 4);  // set the status   bit of the keypad return value
109      }
110    }
111    pinMode(rowPins[row],   INPUT);  // reset the row pin as an input
112    digitalWrite(rowPins[row], HIGH);   // pull the row pin high
113  }
114  
115  return keypadStatus;
116}

// this is a simple code for an emoji keyboard with an 
//arduino leonardo   or micro. this cannot be done with an uno
#include <Keyboard.h>
// Pins 1-7   of the keypad connected to the Arduino respectively:
int keypadPins[7] = {2,   3, 4, 5, 6, 7, 8};
int keypadStatus;  // Used to monitor which buttons are pressed.
int   timeout;  // timeout variable used in loop

void setup()
{
  for (int   i=0; i<7; i++)
  {
    pinMode(keypadPins[i], INPUT);  // Set all keypad pins   as inputs
    digitalWrite(keypadPins[i], HIGH);  // pull all keypad pins high
   }
}

void loop()
{
  keypadStatus = getKeypadStatus();  // read   which buttons are pressed
  if (keypadStatus != 0)  // If a button is pressed   go into here
  {
    sendKeyPress(keypadStatus);  // send the button over   USB
    timeout = 2000;  // top of the repeat delay
    while ((getKeypadStatus()   == keypadStatus) && (--timeout))  // Decrement timeout and check if key is being   held down
      delayMicroseconds(1);
    while (getKeypadStatus() == keypadStatus)   // while the same button is held down
    {
      sendKeyPress(keypadStatus);   // continue to send the button over USB
      delay(50);  // 50ms repeat rate
     }
  }
}

/* sendKeyPress(int key): This function sends a single   key over USB
   It requires an int, of which the 12 LSbs are used. Each bit in
    key represents a single button on the keypad.
   This function will only send   a key press if a single button
   is being pressed */
void sendKeyPress(int   key)
{
  switch(key)
  {
    case 1:  // 0x001
      Keyboard.write('\U0001F600');   //the emojis can be changed to whatever you want
      break;
    case 2:   // 0x002
      Keyboard.write('\U0001F601');
      break;
    case 4:   // 0x004
      Keyboard.write('\U0001F602�');
      break;
    case 8:   // 0x008
      Keyboard.write('\U0001F923');
      break;
    case 16:   // 0x010
      Keyboard.write('\U0001F603');
      break;
    case 32:   // 0x020
      Keyboard.write('\U0001F604');
      break;
    case 64:   // 0x040
      Keyboard.write('\U0001F605');
      break;
    case 128:   // 0x080
      Keyboard.write('\U0001F606');
      break;
    case 256:   // 0x100
      Keyboard.write('\U0001F609');
      break;
    case 512:   // 0x200
      Keyboard.write('\U0001F60A');
      break;
    case 1024:   // 0x400
      Keyboard.write('\U0001F60E');  
      break;
    case   2048:  // 0x800
      Keyboard.press(KEY_HOME);
      Keyboard.write('.');
       Keyboard.release(KEY_HOME);// Sends the 'windows period' command
      break;
       
  }
}


int getKeypadStatus()
{
  int rowPins[4] = {keypadPins[2],   keypadPins[6], keypadPins[5], keypadPins[0]};  // row pins are 2, 7, 6, and 1 of   the keypad
  int columnPins[3] = {keypadPins[1], keypadPins[3], keypadPins[4]};   // column pins are pins 2, 4, and 5 of the keypad
  int keypadStatus = 0;  //   this will be what's returned
  
  /* initialize all pins, inputs w/ pull-ups   */
  for (int i=0; i<7; i++)
  {
    pinMode(keypadPins[i], INPUT);
     digitalWrite(keypadPins[i], HIGH);
  }
  
  for (int row=0; row<4;   row++)
  {  // initial for loop to check all 4 rows
    pinMode(rowPins[row],   OUTPUT);  // set the row pin as an output
    digitalWrite(rowPins[row], LOW);   // pull the row pins low
    for (int col=0; col<3; col++)
    {  // embedded   for loop to check all 3 columns of each row
      if (!digitalRead(columnPins[col]))
       {
        keypadStatus |= 1 << ((row+1)*3 + (col+1) - 4);  // set the status   bit of the keypad return value
      }
    }
    pinMode(rowPins[row],   INPUT);  // reset the row pin as an input
    digitalWrite(rowPins[row], HIGH);   // pull the row pin high
  }
  
  return keypadStatus;
}

code

c_cpp

upload this from Arduino ide to your Leonardo

1// this is a simple code for an emoji keyboard with an 
2//arduino leonardo  or micro. this cannot be done with an uno
3#include <Keyboard.h>
4// Pins 1-7  of the keypad connected to the Arduino respectively:
5int keypadPins[7] = {2,  3, 4, 5, 6, 7, 8};
6int keypadStatus;  // Used to monitor which buttons are pressed.
7int  timeout;  // timeout variable used in loop
8
9void setup()
10{
11  for (int  i=0; i<7; i++)
12  {
13    pinMode(keypadPins[i], INPUT);  // Set all keypad pins  as inputs
14    digitalWrite(keypadPins[i], HIGH);  // pull all keypad pins high
15  }
16}
17
18void loop()
19{
20  keypadStatus = getKeypadStatus();  // read  which buttons are pressed
21  if (keypadStatus != 0)  // If a button is pressed  go into here
22  {
23    sendKeyPress(keypadStatus);  // send the button over  USB
24    timeout = 2000;  // top of the repeat delay
25    while ((getKeypadStatus()  == keypadStatus) && (--timeout))  // Decrement timeout and check if key is being  held down
26      delayMicroseconds(1);
27    while (getKeypadStatus() == keypadStatus)  // while the same button is held down
28    {
29      sendKeyPress(keypadStatus);  // continue to send the button over USB
30      delay(50);  // 50ms repeat rate
31    }
32  }
33}
34
35/* sendKeyPress(int key): This function sends a single  key over USB
36   It requires an int, of which the 12 LSbs are used. Each bit in
37   key represents a single button on the keypad.
38   This function will only send  a key press if a single button
39   is being pressed */
40void sendKeyPress(int  key)
41{
42  switch(key)
43  {
44    case 1:  // 0x001
45      Keyboard.write('\U0001F600');  //the emojis can be changed to whatever you want
46      break;
47    case 2:  // 0x002
48      Keyboard.write('\U0001F601');
49      break;
50    case 4:  // 0x004
51      Keyboard.write('\U0001F602�');
52      break;
53    case 8:  // 0x008
54      Keyboard.write('\U0001F923');
55      break;
56    case 16:  // 0x010
57      Keyboard.write('\U0001F603');
58      break;
59    case 32:  // 0x020
60      Keyboard.write('\U0001F604');
61      break;
62    case 64:  // 0x040
63      Keyboard.write('\U0001F605');
64      break;
65    case 128:  // 0x080
66      Keyboard.write('\U0001F606');
67      break;
68    case 256:  // 0x100
69      Keyboard.write('\U0001F609');
70      break;
71    case 512:  // 0x200
72      Keyboard.write('\U0001F60A');
73      break;
74    case 1024:  // 0x400
75      Keyboard.write('\U0001F60E');  
76      break;
77    case  2048:  // 0x800
78      Keyboard.press(KEY_HOME);
79      Keyboard.write('.');
80      Keyboard.release(KEY_HOME);// Sends the 'windows period' command
81      break;
82      
83  }
84}
85
86
87int getKeypadStatus()
88{
89  int rowPins[4] = {keypadPins[2],  keypadPins[6], keypadPins[5], keypadPins[0]};  // row pins are 2, 7, 6, and 1 of  the keypad
90  int columnPins[3] = {keypadPins[1], keypadPins[3], keypadPins[4]};  // column pins are pins 2, 4, and 5 of the keypad
91  int keypadStatus = 0;  //  this will be what's returned
92  
93  /* initialize all pins, inputs w/ pull-ups  */
94  for (int i=0; i<7; i++)
95  {
96    pinMode(keypadPins[i], INPUT);
97    digitalWrite(keypadPins[i], HIGH);
98  }
99  
100  for (int row=0; row<4;  row++)
101  {  // initial for loop to check all 4 rows
102    pinMode(rowPins[row],  OUTPUT);  // set the row pin as an output
103    digitalWrite(rowPins[row], LOW);  // pull the row pins low
104    for (int col=0; col<3; col++)
105    {  // embedded  for loop to check all 3 columns of each row
106      if (!digitalRead(columnPins[col]))
107      {
108        keypadStatus |= 1 << ((row+1)*3 + (col+1) - 4);  // set the status  bit of the keypad return value
109      }
110    }
111    pinMode(rowPins[row],  INPUT);  // reset the row pin as an input
112    digitalWrite(rowPins[row], HIGH);  // pull the row pin high
113  }
114  
115  return keypadStatus;
116}

// this is a simple code for an emoji keyboard with an 
//arduino leonardo  or micro. this cannot be done with an uno
#include <Keyboard.h>
// Pins 1-7  of the keypad connected to the Arduino respectively:
int keypadPins[7] = {2,  3, 4, 5, 6, 7, 8};
int keypadStatus;  // Used to monitor which buttons are pressed.
int  timeout;  // timeout variable used in loop

void setup()
{
  for (int  i=0; i<7; i++)
  {
    pinMode(keypadPins[i], INPUT);  // Set all keypad pins  as inputs
    digitalWrite(keypadPins[i], HIGH);  // pull all keypad pins high
  }
}

void loop()
{
  keypadStatus = getKeypadStatus();  // read  which buttons are pressed
  if (keypadStatus != 0)  // If a button is pressed  go into here
  {
    sendKeyPress(keypadStatus);  // send the button over  USB
    timeout = 2000;  // top of the repeat delay
    while ((getKeypadStatus()  == keypadStatus) && (--timeout))  // Decrement timeout and check if key is being  held down
      delayMicroseconds(1);
    while (getKeypadStatus() == keypadStatus)  // while the same button is held down
    {
      sendKeyPress(keypadStatus);  // continue to send the button over USB
      delay(50);  // 50ms repeat rate
    }
  }
}

/* sendKeyPress(int key): This function sends a single  key over USB
   It requires an int, of which the 12 LSbs are used. Each bit in
   key represents a single button on the keypad.
   This function will only send  a key press if a single button
   is being pressed */
void sendKeyPress(int  key)
{
  switch(key)
  {
    case 1:  // 0x001
      Keyboard.write('\U0001F600');  //the emojis can be changed to whatever you want
      break;
    case 2:  // 0x002
      Keyboard.write('\U0001F601');
      break;
    case 4:  // 0x004
      Keyboard.write('\U0001F602�');
      break;
    case 8:  // 0x008
      Keyboard.write('\U0001F923');
      break;
    case 16:  // 0x010
      Keyboard.write('\U0001F603');
      break;
    case 32:  // 0x020
      Keyboard.write('\U0001F604');
      break;
    case 64:  // 0x040
      Keyboard.write('\U0001F605');
      break;
    case 128:  // 0x080
      Keyboard.write('\U0001F606');
      break;
    case 256:  // 0x100
      Keyboard.write('\U0001F609');
      break;
    case 512:  // 0x200
      Keyboard.write('\U0001F60A');
      break;
    case 1024:  // 0x400
      Keyboard.write('\U0001F60E');  
      break;
    case  2048:  // 0x800
      Keyboard.press(KEY_HOME);
      Keyboard.write('.');
      Keyboard.release(KEY_HOME);// Sends the 'windows period' command
      break;
      
  }
}


int getKeypadStatus()
{
  int rowPins[4] = {keypadPins[2],  keypadPins[6], keypadPins[5], keypadPins[0]};  // row pins are 2, 7, 6, and 1 of  the keypad
  int columnPins[3] = {keypadPins[1], keypadPins[3], keypadPins[4]};  // column pins are pins 2, 4, and 5 of the keypad
  int keypadStatus = 0;  //  this will be what's returned
  
  /* initialize all pins, inputs w/ pull-ups  */
  for (int i=0; i<7; i++)
  {
    pinMode(keypadPins[i], INPUT);
    digitalWrite(keypadPins[i], HIGH);
  }
  
  for (int row=0; row<4;  row++)
  {  // initial for loop to check all 4 rows
    pinMode(rowPins[row],  OUTPUT);  // set the row pin as an output
    digitalWrite(rowPins[row], LOW);  // pull the row pins low
    for (int col=0; col<3; col++)
    {  // embedded  for loop to check all 3 columns of each row
      if (!digitalRead(columnPins[col]))
      {
        keypadStatus |= 1 << ((row+1)*3 + (col+1) - 4);  // set the status  bit of the keypad return value
      }
    }
    pinMode(rowPins[row],  INPUT);  // reset the row pin as an input
    digitalWrite(rowPins[row], HIGH);  // pull the row pin high
  }
  
  return keypadStatus;
}

Downloadable files

schematics

wire keypad pin 1 to d2, pin 2 to d3, pin 3 to d4, pin 4 to d5, pin 5 to d6, pin 6 to d7, and pin 7 to d8.

schematics

Comments

Only logged in users can leave comments

aryabalanbalakrishnan

0 Followers

•

0 Projects

Intro

Components and supplies

Apps and platforms

Project description

Code

Downloadable files