1 | /* Robot Inputs
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2 |
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3 | This sketch shows you how to use the on-board
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4 | potentiometer and buttons as inputs.
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5 |
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6 | Turning the potentiometer draws a clock-shaped
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7 | circle. The up and down buttons change the pitch,
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8 | while the left and right buttons change the tempo.
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9 | The middle button resets tempo and pitch.
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10 |
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11 | Circuit:
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12 | * Arduino Robot
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13 |
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14 | created 1 May 2013
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15 | by X. Yang
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16 | modified 12 May 2013
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17 | by D. Cuartielles
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18 |
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19 | This example is in the public domain
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20 | */
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21 |
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22 | #include <ArduinoRobot.h>
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23 | #include <Wire.h>
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24 | #include <SPI.h>
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25 |
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26 | // default tempo and pitch of the music
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27 | int tempo = 60;
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28 | int pitch = 1000;
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29 |
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30 | void setup() {
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31 | // initialize the Robot, SD card, speaker, and display
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32 | Robot.begin();
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33 | Robot.beginTFT();
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34 | Robot.beginSpeaker();
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35 | Robot.beginSD();
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36 |
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37 | // draw "lg0.bmp" and "lg1.bmp" on the screen
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38 | Robot.displayLogos();
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39 |
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40 | // play a sound file
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41 | Robot.playFile("Melody.sqm");
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42 | }
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43 |
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44 | void loop() {
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45 | // check the value of the buttons
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46 | keyDown(Robot.keyboardRead());
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47 |
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48 | // check the value of the pot
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49 | drawKnob(Robot.knobRead());
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50 | }
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51 |
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52 | // Draw the basic interface
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53 | void renderUI() {
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54 | //fill the buttons blank
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55 | Robot.fill(255, 255, 255);
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56 | Robot.rect(53, 58, 13, 13); // left
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57 | Robot.rect(93, 58, 13, 13); // right
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58 | Robot.rect(73, 38, 13, 13); // up
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59 | Robot.circle(79, 64, 6); // middle
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60 | Robot.rect(73, 78, 13, 13); // down
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61 |
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62 | //draw the knob
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63 | Robot.noFill();
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64 | Robot.circle(26, 116, 17); // knob
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65 |
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66 | //draw the vertical bargraph
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67 | int fullPart = map(pitch, 200, 2000, 0, 58); //length of filled bargraph
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68 | Robot.fill(255, 255, 255);
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69 | Robot.rect(21, 30, 13, 58 - fullPart);
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70 | Robot.fill(0, 0, 255);
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71 | Robot.rect(21, 88 - fullPart, 13, fullPart); //58-fullPart+30
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72 |
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73 | //draw the horizontal bargraph
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74 | fullPart = map(tempo, 20, 100, 0, 58); // length of filled bargraph
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75 | Robot.fill(255, 190, 0);
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76 | Robot.rect(53, 110, fullPart, 13);
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77 | Robot.fill(255, 255, 255);
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78 | Robot.rect(53 + fullPart, 110, 58 - fullPart, 13);
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79 | }
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80 |
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81 | void keyDown(int keyCode) {
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82 | // use a static int so it is persistent over time
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83 | static int oldKey;
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84 | switch (keyCode) {
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85 | case BUTTON_LEFT:
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86 | //left button pressed, reduces tempo
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87 | tempo -= 5;
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88 | if (tempo < 20) tempo = 20; //lowest tempo 20
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89 | Robot.fill(255, 190, 0);
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90 |
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91 | Robot.rect(53, 58, 13, 13);
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92 | break;
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93 | case BUTTON_RIGHT:
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94 | //right button pressed, increases tempo
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95 | tempo += 5;
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96 | if (tempo > 100) tempo = 100; //highest tempo 100
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97 | Robot.fill(255, 190, 0);
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98 | Robot.rect(93, 58, 13, 13);
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99 | break;
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100 | case BUTTON_UP:
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101 | //up button pressed, increases pitch
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102 | pitch += 120;
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103 | if (pitch > 2000) pitch = 2000;
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104 | Robot.fill(0, 0, 255);
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105 |
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106 | Robot.rect(73, 38, 13, 13);
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107 | break;
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108 | case BUTTON_DOWN:
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109 | //down button pressed, reduces pitch
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110 | pitch -= 120;
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111 | if (pitch < 200) {
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112 | pitch = 200;
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113 | }
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114 | Robot.fill(0, 0, 255);
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115 |
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116 | Robot.rect(73, 78, 13, 13);
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117 | break;
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118 | case BUTTON_MIDDLE:
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119 | //middle button pressed, resets tempo and pitch
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120 | tempo = 60;
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121 | pitch = 1000;
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122 | Robot.fill(160, 160, 160);
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123 |
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124 | Robot.circle(79, 64, 6);
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125 | break;
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126 | case BUTTON_NONE:
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127 | //Only when the keys are released(thus BUTTON_NONE is
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128 | //encountered the first time), the interface will be
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129 | //re-drawn.
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130 | if (oldKey != BUTTON_NONE) {
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131 | renderUI();
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132 | }
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133 | break;
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134 | }
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135 | if (oldKey != keyCode) {
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136 | // change the song's tempo
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137 | Robot.tempoWrite(tempo);
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138 | // change the song's pitch
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139 | Robot.tuneWrite(float(pitch / 1000.0));
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140 | }
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141 | oldKey = keyCode;
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142 | }
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143 |
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144 | //Draw a circle according to value
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145 | //of the knob.
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146 | void drawKnob(int val) {
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147 | static int val_old;
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148 | int r = map(val, 0, 1023, 1, 15);
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149 |
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150 | //Only updates when the
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151 | //value changes.
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152 | if (val_old != r) {
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153 | Robot.noFill();
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154 |
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155 | //erase the old circle
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156 | Robot.stroke(255, 255, 255);
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157 | Robot.circle(26, 116, r + 1);
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158 |
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159 | //draw the new circle
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160 | Robot.stroke(255, 0, 255);
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161 | Robot.circle(26, 116, r);
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162 |
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163 | Robot.stroke(0, 0, 0);
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164 |
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165 | val_old = r;
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166 | }
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167 | }
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