1 | /*
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2 |
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3 | Arduino TFT Bitmap Logo example
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4 |
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5 | This example reads an image file from a micro-SD card
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6 | and draws it on the screen, at random locations.
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7 |
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8 | In this sketch, the Arduino logo is read from a micro-SD card.
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9 | There is a .bmp file included with this sketch.
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10 | - open the sketch folder (Ctrl-K or Cmd-K)
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11 | - copy the "arduino.bmp" file to a micro-SD
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12 | - put the SD into the SD slot of the Arduino TFT module.
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13 |
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14 | This example code is in the public domain.
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15 |
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16 | Created 19 April 2013 by Enrico Gueli
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17 |
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18 | http://arduino.cc/en/Tutorial/TFTBitmapLogo
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19 |
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20 | */
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21 |
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22 | // include the necessary libraries
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23 | #include <SPI.h>
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24 | #include <SD.h>
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25 | #include <TFT.h> // Arduino LCD library
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26 |
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27 | // pin definition for the Uno
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28 | #define sd_cs 4
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29 | #define lcd_cs 10
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30 | #define dc 9
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31 | #define rst 8
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32 |
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33 | // pin definition for the Leonardo
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34 | //#define sd_cs 8
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35 | //#define lcd_cs 7
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36 | //#define dc 0
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37 | //#define rst 1
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38 |
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39 | TFT TFTscreen = TFT(lcd_cs, dc, rst);
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40 |
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41 | // this variable represents the image to be drawn on screen
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42 | PImage logo;
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43 |
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44 |
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45 | void setup() {
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46 | // initialize the GLCD and show a message
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47 | // asking the user to open the serial line
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48 | TFTscreen.begin();
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49 | TFTscreen.background(255, 255, 255);
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50 |
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51 | TFTscreen.stroke(0, 0, 255);
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52 | TFTscreen.println();
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53 | TFTscreen.println(F("Arduino TFT Bitmap Example"));
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54 | TFTscreen.stroke(0, 0, 0);
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55 | TFTscreen.println(F("Open serial monitor"));
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56 | TFTscreen.println(F("to run the sketch"));
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57 |
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58 | // initialize the serial port: it will be used to
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59 | // print some diagnostic info
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60 | Serial.begin(9600);
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61 | while (!Serial) {
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62 | // wait for serial line to be ready
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63 | }
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64 |
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65 | // clear the GLCD screen before starting
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66 | TFTscreen.background(255, 255, 255);
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67 |
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68 | // try to access the SD card. If that fails (e.g.
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69 | // no card present), the setup process will stop.
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70 | Serial.print(F("Initializing SD card..."));
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71 | if (!SD.begin(sd_cs)) {
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72 | Serial.println(F("failed!"));
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73 | return;
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74 | }
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75 | Serial.println(F("OK!"));
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76 |
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77 | // initialize and clear the GLCD screen
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78 | TFTscreen.begin();
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79 | TFTscreen.background(255, 255, 255);
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80 |
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81 | // now that the SD card can be access, try to load the
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82 | // image file.
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83 | logo = TFTscreen.loadImage("arduino.bmp");
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84 | if (!logo.isValid()) {
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85 | Serial.println(F("error while loading arduino.bmp"));
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86 | }
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87 | }
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88 |
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89 | void loop() {
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90 | // don't do anything if the image wasn't loaded correctly.
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91 | if (logo.isValid() == false) {
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92 | return;
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93 | }
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94 |
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95 | Serial.println(F("drawing image"));
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96 |
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97 | // get a random location where to draw the image.
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98 | // To avoid the image to be draw outside the screen,
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99 | // take into account the image size.
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100 | int x = random(TFTscreen.width() - logo.width());
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101 | int y = random(TFTscreen.height() - logo.height());
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102 |
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103 | // draw the image to the screen
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104 | TFTscreen.image(logo, x, y);
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105 |
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106 | // wait a little bit before drawing again
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107 | delay(1500);
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108 | }
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