acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
Sprite_TFT_Rainbow.ino (3986B)
      1 /*
      2   An example showing rainbow colours on a 160x128 TFT LCD screen
      3   and to show a basic example of font use.
      4 
      5   This example plots the text in a sprite then pushes the sprite to the
      6   TFT screen.
      7   
      8   Make sure all the display driver and pin connections are correct by
      9   editing the User_Setup.h file in the TFT_eSPI library folder.
     10 
     11   Note that yield() or delay(0) must be called in long duration for/while
     12   loops to stop the ESP8266 watchdog triggering.
     13 
     14   #########################################################################
     15   ###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
     16   #########################################################################
     17 */
     18 
     19 #define IWIDTH  160
     20 #define IHEIGHT 128
     21 
     22 #include <TFT_eSPI.h> // Graphics and font library
     23 #include <SPI.h>
     24 
     25 TFT_eSPI tft = TFT_eSPI();  // Invoke library, pins defined in User_Setup.h
     26 
     27 TFT_eSprite img = TFT_eSprite(&tft);
     28 
     29 unsigned long targetTime = 0;
     30 byte red = 31;
     31 byte green = 0;
     32 byte blue = 0;
     33 byte state = 0;
     34 unsigned int colour = red << 11;
     35 
     36 void setup(void) {
     37   tft.init();
     38   tft.setRotation(1);
     39   tft.fillScreen(TFT_BLACK);
     40 
     41   img.createSprite(IWIDTH, IHEIGHT);
     42   img.fillSprite(TFT_BLACK);
     43 
     44   targetTime = millis() + 1000;
     45 }
     46 
     47 void loop() {
     48 
     49   if (targetTime < millis()) {
     50     targetTime = millis() + 100;//10000;
     51 
     52     // Colour changing state machine
     53     for (int i = 0; i < 160; i++) {
     54       img.drawFastVLine(i, 0, img.height(), colour);
     55       switch (state) {
     56         case 0:
     57           green += 2;
     58           if (green == 64) {
     59             green = 63;
     60             state = 1;
     61           }
     62           break;
     63         case 1:
     64           red--;
     65           if (red == 255) {
     66             red = 0;
     67             state = 2;
     68           }
     69           break;
     70         case 2:
     71           blue ++;
     72           if (blue == 32) {
     73             blue = 31;
     74             state = 3;
     75           }
     76           break;
     77         case 3:
     78           green -= 2;
     79           if (green == 255) {
     80             green = 0;
     81             state = 4;
     82           }
     83           break;
     84         case 4:
     85           red ++;
     86           if (red == 32) {
     87             red = 31;
     88             state = 5;
     89           }
     90           break;
     91         case 5:
     92           blue --;
     93           if (blue == 255) {
     94             blue = 0;
     95             state = 0;
     96           }
     97           break;
     98       }
     99       colour = red << 11 | green << 5 | blue;
    100     }
    101 
    102     // The standard ADAFruit font still works as before
    103     img.setTextColor(TFT_BLACK);
    104     img.setCursor (12, 5);
    105     img.print("Original ADAfruit font!");
    106 
    107     // The new larger fonts do not use the .setCursor call, coords are embedded
    108     img.setTextColor(TFT_BLACK, TFT_BLACK); // Do not plot the background colour
    109 
    110     // Overlay the black text on top of the rainbow plot (the advantage of not drawing the background colour!)
    111     img.drawCentreString("Font size 2", 80, 14, 2); // Draw text centre at position 80, 12 using font 2
    112 
    113     //img.drawCentreString("Font size 2",81,12,2); // Draw text centre at position 80, 12 using font 2
    114 
    115     img.drawCentreString("Font size 4", 80, 30, 4); // Draw text centre at position 80, 24 using font 4
    116 
    117     img.drawCentreString("12.34", 80, 54, 6); // Draw text centre at position 80, 24 using font 6
    118 
    119     img.drawCentreString("12.34 is in font size 6", 80, 92, 2); // Draw text centre at position 80, 90 using font 2
    120 
    121     // Note the x position is the top left of the font!
    122 
    123     // draw a floating point number
    124     float pi = 3.14159; // Value to print
    125     int precision = 3;  // Number of digits after decimal point
    126     int xpos = 50;      // x position
    127     int ypos = 110;     // y position
    128     int font = 2;       // font number only 2,4,6,7 valid. Font 6 only contains characters [space] 0 1 2 3 4 5 6 7 8 9 0 : a p m
    129     xpos += img.drawFloat(pi, precision, xpos, ypos, font); // Draw rounded number and return new xpos delta for next print position
    130     img.drawString(" is pi", xpos, ypos, font); // Continue printing from new x position
    131 
    132     img.pushSprite(0, 0);
    133   }
    134 }
    135 
    136 
    137 
    138 
    139 
    140