[136] | 1 | /*
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| 2 | LiquidCrystal Library - Custom Characters
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| 3 |
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| 4 | Demonstrates how to add custom characters on an LCD display.
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| 5 | The LiquidCrystal library works with all LCD displays that are
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| 6 | compatible with the Hitachi HD44780 driver. There are many of
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| 7 | them out there, and you can usually tell them by the 16-pin interface.
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| 8 |
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| 9 | This sketch prints "I <heart> Arduino!" and a little dancing man
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| 10 | to the LCD.
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| 11 |
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| 12 | The circuit:
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| 13 | * LCD RS pin to digital pin 12
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| 14 | * LCD Enable pin to digital pin 11
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| 15 | * LCD D4 pin to digital pin 5
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| 16 | * LCD D5 pin to digital pin 4
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| 17 | * LCD D6 pin to digital pin 3
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| 18 | * LCD D7 pin to digital pin 2
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| 19 | * LCD R/W pin to ground
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| 20 | * 10K potentiometer:
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| 21 | * ends to +5V and ground
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| 22 | * wiper to LCD VO pin (pin 3)
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| 23 | * 10K poterntiometer on pin A0
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| 24 |
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| 25 | created 21 Mar 2011
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| 26 | by Tom Igoe
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| 27 | modified 11 Nov 2013
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| 28 | by Scott Fitzgerald
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| 29 |
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| 30 | Based on Adafruit's example at
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| 31 | https://github.com/adafruit/SPI_VFD/blob/master/examples/createChar/createChar.pde
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| 32 |
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| 33 | This example code is in the public domain.
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| 34 | http://www.arduino.cc/en/Tutorial/LiquidCrystal
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| 35 |
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| 36 | Also useful:
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| 37 | http://icontexto.com/charactercreator/
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| 38 |
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| 39 | */
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| 40 |
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| 41 | // include the library code:
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| 42 | #include <LiquidCrystal.h>
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| 43 |
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| 44 | // initialize the library with the numbers of the interface pins
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| 45 | LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
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| 46 |
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| 47 | // make some custom characters:
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| 48 | byte heart[8] = {
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| 49 | 0b00000,
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| 50 | 0b01010,
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| 51 | 0b11111,
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| 52 | 0b11111,
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| 53 | 0b11111,
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| 54 | 0b01110,
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| 55 | 0b00100,
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| 56 | 0b00000
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| 57 | };
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| 58 |
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| 59 | byte smiley[8] = {
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| 60 | 0b00000,
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| 61 | 0b00000,
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| 62 | 0b01010,
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| 63 | 0b00000,
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| 64 | 0b00000,
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| 65 | 0b10001,
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| 66 | 0b01110,
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| 67 | 0b00000
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| 68 | };
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| 69 |
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| 70 | byte frownie[8] = {
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| 71 | 0b00000,
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| 72 | 0b00000,
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| 73 | 0b01010,
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| 74 | 0b00000,
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| 75 | 0b00000,
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| 76 | 0b00000,
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| 77 | 0b01110,
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| 78 | 0b10001
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| 79 | };
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| 80 |
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| 81 | byte armsDown[8] = {
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| 82 | 0b00100,
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| 83 | 0b01010,
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| 84 | 0b00100,
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| 85 | 0b00100,
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| 86 | 0b01110,
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| 87 | 0b10101,
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| 88 | 0b00100,
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| 89 | 0b01010
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| 90 | };
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| 91 |
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| 92 | byte armsUp[8] = {
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| 93 | 0b00100,
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| 94 | 0b01010,
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| 95 | 0b00100,
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| 96 | 0b10101,
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| 97 | 0b01110,
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| 98 | 0b00100,
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| 99 | 0b00100,
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| 100 | 0b01010
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| 101 | };
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| 102 |
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| 103 | void setup() {
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| 104 | // initialize LCD and set up the number of columns and rows:
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| 105 | lcd.begin(16, 2);
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| 106 |
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| 107 | // create a new character
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| 108 | lcd.createChar(0, heart);
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| 109 | // create a new character
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| 110 | lcd.createChar(1, smiley);
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| 111 | // create a new character
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| 112 | lcd.createChar(2, frownie);
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| 113 | // create a new character
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| 114 | lcd.createChar(3, armsDown);
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| 115 | // create a new character
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| 116 | lcd.createChar(4, armsUp);
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| 117 |
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| 118 | // Print a message to the lcd.
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| 119 | lcd.print("I ");
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| 120 | lcd.write(byte(0)); // when calling lcd.write() '0' must be cast as a byte
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| 121 | lcd.print(" Arduino! ");
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| 122 | lcd.write((byte) 1);
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| 123 |
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| 124 | }
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| 125 |
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| 126 | void loop() {
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| 127 | // read the potentiometer on A0:
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| 128 | int sensorReading = analogRead(A0);
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| 129 | // map the result to 200 - 1000:
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| 130 | int delayTime = map(sensorReading, 0, 1023, 200, 1000);
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| 131 | // set the cursor to the bottom row, 5th position:
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| 132 | lcd.setCursor(4, 1);
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| 133 | // draw the little man, arms down:
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| 134 | lcd.write(3);
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| 135 | delay(delayTime);
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| 136 | lcd.setCursor(4, 1);
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| 137 | // draw him arms up:
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| 138 | lcd.write(4);
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| 139 | delay(delayTime);
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| 140 | }
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