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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