122 lines
4.3 KiB
C++
122 lines
4.3 KiB
C++
/*
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Example for TFT_eSPI library
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This example shows the use of a Adafruit_GFX custom font with a
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character code range of 32 - 255, this means accented characters
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(amongst others) are available.
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The custom font file is attached to this sketch as a header file. The
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font data has been created following the instructions here:
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https://www.youtube.com/watch?v=L8MmTISmwZ8
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Note that online converters for Adafruit_GFX compatible fonts are
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available but these typically only use characters in the range 32-127,
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and thus do not include the accented characters. These online converters
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can however still be used with this sketch but the example characters
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used must be changed.
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The Arduino IDE uses UTF8 encoding for these characters. The TFT_eSPI
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library also expects characters in the range 128 to 255 to be UTF-8
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encoded. See link here for details:
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https://playground.arduino.cc/Code/UTF-8
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To sumarise, UTF-8 characters are encoded as mor than 1 byte so care must
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be taken:
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char c = 'µ'; // Wrong
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char bad[4] = "5µA"; // Wrong
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char good[] = "5µA"; // Good
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String okay = "5µA"; // Good
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Created by Bodmer 08/02/19
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Make sure LOAD_GFXFF is defined in the used User_Setup file
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within the library folder.
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#########################################################################
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###### DON'T FORGET TO UPDATE THE User_Setup.h FILE IN THE LIBRARY ######
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###### TO SELECT YOUR DISPLAY TYPE, PINS USED AND ENABLE FONTS ######
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#########################################################################
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*/
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#define TEST_TEXT "ßäöü ñâàå" // Text that will be printed on screen in the font
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//#define TEST_TEXT "Hello" // Text that will be printed on screen in the font
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#include "SPI.h"
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#include "TFT_eSPI.h"
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// The custom font file attached to this sketch must be included
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#include "MyFont.h"
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// Stock font and GFXFF reference handle
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#define GFXFF 1
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// Easily remembered name for the font
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#define MYFONT32 &myFont32pt8b
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// Use hardware SPI
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TFT_eSPI tft = TFT_eSPI();
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void setup(void) {
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Serial.begin(250000);
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tft.begin();
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tft.setRotation(1);
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}
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void loop() {
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// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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// Show custom fonts
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// >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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// Where font sizes increase the screen is not cleared as the larger fonts overwrite
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// the smaller one with the background colour.
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// We can set the text datum to be Top, Middle, Bottom vertically and Left, Centre
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// and Right horizontally. These are the text datums that can be used:
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// TL_DATUM = Top left (default)
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// TC_DATUM = Top centre
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// TR_DATUM = Top right
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// ML_DATUM = Middle left
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// MC_DATUM = Middle centre <<< This is used below
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// MR_DATUM = Middle right
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// BL_DATUM = Bottom left
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// BC_DATUM = Bottom centre
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// BR_DATUM = Bottom right
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// L_BASELINE = Left character baseline (Line the 'A' character would sit on)
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// C_BASELINE = Centre character baseline
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// R_BASELINE = Right character baseline
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//Serial.println();
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// Set text datum to middle centre (MC_DATUM)
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tft.setTextDatum(MC_DATUM);
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// Set text colour to white with black background
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// Unlike the stock Adafruit_GFX library, the TFT_eSPI library DOES optionally draw
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// the background colour for the custom and Free Fonts when using drawString()
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tft.setTextColor(TFT_WHITE, TFT_BLACK); // White characters on black background
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//tft.setTextColor(TFT_WHITE); // or white characters, no background
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tft.fillScreen(TFT_BLUE); // Clear screen
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tft.setFreeFont(MYFONT32); // Select the font
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tft.drawString("MyFont 32", 160, 60, GFXFF); // Print the name of the font
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tft.setFreeFont(MYFONT32); // Select the font
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tft.drawString(TEST_TEXT, 160, 140, GFXFF); // Print the test text in the custom font
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delay(2000);
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// Setting textDatum does nothing when using tft.print
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tft.fillScreen(TFT_BLUE); // Clear screen
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tft.setCursor(0,60); // To be compatible with Adafruit_GFX the cursor datum is always bottom left
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tft.print("âäàå"); // Using tft.print means text background is NEVER rendered
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delay(2000);
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// Reset text padding to zero (default)
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tft.setTextPadding(0);
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}
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