acid-drop

- Hacking the planet from a LilyGo T-Deck using custom firmware
git clone git://git.acid.vegas/acid-drop.git
Local_Custom_Fonts.ino (4380B)
      1 /*
      2   Example for TFT_eSPI library
      3 
      4   This example shows the use of a Adafruit_GFX custom font with a
      5   character code range of 32 - 255, this means accented characters
      6   (amongst others) are available.
      7 
      8   The custom font file is attached to this sketch as a header file. The
      9   font data has been created following the instructions here:
     10   https://www.youtube.com/watch?v=L8MmTISmwZ8
     11 
     12   Note that online converters for Adafruit_GFX compatible fonts are
     13   available but these typically only use characters in the range 32-127,
     14   and thus do not include the accented characters. These online converters
     15   can however still be used with this sketch but the example characters
     16   used must be changed.
     17 
     18   The Arduino IDE uses UTF8 encoding for these characters. The TFT_eSPI
     19   library also expects characters in the range 128 to 255 to be UTF-8
     20   encoded. See link here for details:
     21 
     22   https://playground.arduino.cc/Code/UTF-8
     23 
     24   To summarise, UTF-8 characters are encoded as more than 1 byte so care must
     25   be taken:
     26 
     27      char c = 'µ';          // Wrong
     28      char bad[4] = "5µA";   // Wrong
     29      char good[] = "5µA";   // Good
     30      String okay = "5µA";   // Good
     31 
     32   Created by Bodmer 08/02/19
     33 
     34   Make sure LOAD_GFXFF is defined in the used User_Setup file
     35   within the library folder.
     36 
     37   #########################################################################
     38   ###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
     39   ######   TO SELECT YOUR DISPLAY TYPE, PINS USED AND ENABLE FONTS   ######
     40   #########################################################################
     41 */
     42 
     43 #define TEST_TEXT "ßäöü ñâàå"   // Text that will be printed on screen in the font
     44 //#define TEST_TEXT "Hello"     // Text that will be printed on screen in the font
     45 
     46 #include "SPI.h"
     47 #include "TFT_eSPI.h"
     48 
     49 // The custom font file attached to this sketch must be included
     50 #include "MyFont.h"
     51 
     52 // Stock font and GFXFF reference handle
     53 #define GFXFF 1
     54 
     55 // Easily remembered name for the font
     56 #define MYFONT32 &myFont32pt8b
     57 
     58 // Use hardware SPI
     59 TFT_eSPI tft = TFT_eSPI();
     60 
     61 void setup(void) {
     62 
     63   Serial.begin(250000);
     64   
     65   tft.begin();
     66 
     67   tft.setRotation(1);
     68 
     69 }
     70 
     71 void loop() {
     72 
     73   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
     74   // Show custom fonts
     75   // >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
     76 
     77   // Where font sizes increase the screen is not cleared as the larger fonts overwrite
     78   // the smaller one with the background colour.
     79 
     80   // We can set the text datum to be Top, Middle, Bottom vertically and Left, Centre
     81   // and Right horizontally. These are the text datums that can be used:
     82   // TL_DATUM = Top left (default)
     83   // TC_DATUM = Top centre
     84   // TR_DATUM = Top right
     85   // ML_DATUM = Middle left
     86   // MC_DATUM = Middle centre <<< This is used below
     87   // MR_DATUM = Middle right
     88   // BL_DATUM = Bottom left
     89   // BC_DATUM = Bottom centre
     90   // BR_DATUM = Bottom right
     91   // L_BASELINE = Left character baseline (Line the 'A' character would sit on)
     92   // C_BASELINE = Centre character baseline
     93   // R_BASELINE = Right character baseline
     94 
     95   //Serial.println();
     96 
     97   // Set text datum to middle centre (MC_DATUM)
     98   tft.setTextDatum(MC_DATUM);
     99 
    100   // Set text colour to white with black background
    101   // Unlike the stock Adafruit_GFX library, the TFT_eSPI library DOES optionally draw
    102   // the background colour for the custom and Free Fonts when using drawString()
    103   tft.setTextColor(TFT_WHITE, TFT_BLACK);      // White characters on black background
    104   //tft.setTextColor(TFT_WHITE);               // or white characters, no background
    105 
    106   tft.fillScreen(TFT_BLUE);                    // Clear screen
    107   tft.setFreeFont(MYFONT32);                   // Select the font
    108   tft.drawString("MyFont 32", 160, 60, GFXFF); // Print the name of the font
    109   tft.setFreeFont(MYFONT32);                   // Select the font
    110   tft.drawString(TEST_TEXT, 160, 140, GFXFF);  // Print the test text in the custom font
    111   delay(2000);
    112 
    113   // Setting textDatum does nothing when using tft.print
    114   tft.fillScreen(TFT_BLUE);  // Clear screen
    115   tft.setCursor(0,60);       // To be compatible with Adafruit_GFX the cursor datum is always bottom left
    116   tft.print("âäàå");         // Using tft.print means text background is NEVER rendered
    117   delay(2000);
    118   
    119   // Reset text padding to zero (default)
    120   tft.setTextPadding(0);
    121 }