128 lines
3.7 KiB
C++
128 lines
3.7 KiB
C++
/*
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An example showing rainbow colours on a 1.8" TFT LCD screen
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and to show a basic example of font use.
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Make sure all the display driver and pin comnenctions are correct by
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editting the User_Setup.h file in the TFT_eSPI library folder.
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Note that yield() or delay(0) must be called in long duration for/while
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loops to stop the ESP8266 watchdog triggering.
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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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#########################################################################
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*/
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#include <TFT_eSPI.h> // Graphics and font library for ST7735 driver chip
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#include <SPI.h>
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TFT_eSPI tft = TFT_eSPI(); // Invoke library, pins defined in User_Setup.h
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unsigned long targetTime = 0;
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byte red = 31;
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byte green = 0;
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byte blue = 0;
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byte state = 0;
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unsigned int colour = red << 11;
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void setup(void) {
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tft.init();
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tft.setRotation(1);
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tft.fillScreen(TFT_BLACK);
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targetTime = millis() + 1000;
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}
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void loop() {
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if (targetTime < millis()) {
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targetTime = millis() + 10000;
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// Colour changing state machine
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for (int i = 0; i < 160; i++) {
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tft.drawFastVLine(i, 0, tft.height(), colour);
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switch (state) {
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case 0:
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green += 2;
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if (green == 64) {
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green = 63;
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state = 1;
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}
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break;
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case 1:
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red--;
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if (red == 255) {
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red = 0;
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state = 2;
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}
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break;
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case 2:
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blue ++;
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if (blue == 32) {
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blue = 31;
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state = 3;
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}
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break;
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case 3:
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green -= 2;
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if (green == 255) {
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green = 0;
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state = 4;
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}
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break;
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case 4:
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red ++;
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if (red == 32) {
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red = 31;
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state = 5;
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}
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break;
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case 5:
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blue --;
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if (blue == 255) {
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blue = 0;
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state = 0;
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}
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break;
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}
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colour = red << 11 | green << 5 | blue;
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}
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// The standard ADAFruit font still works as before
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tft.setTextColor(TFT_BLACK);
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tft.setCursor (12, 5);
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tft.print("Original ADAfruit font!");
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// The new larger fonts do not use the .setCursor call, coords are embedded
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tft.setTextColor(TFT_BLACK, TFT_BLACK); // Do not plot the background colour
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// Overlay the black text on top of the rainbow plot (the advantage of not drawing the backgorund colour!)
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tft.drawCentreString("Font size 2", 80, 14, 2); // Draw text centre at position 80, 12 using font 2
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//tft.drawCentreString("Font size 2",81,12,2); // Draw text centre at position 80, 12 using font 2
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tft.drawCentreString("Font size 4", 80, 30, 4); // Draw text centre at position 80, 24 using font 4
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tft.drawCentreString("12.34", 80, 54, 6); // Draw text centre at position 80, 24 using font 6
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tft.drawCentreString("12.34 is in font size 6", 80, 92, 2); // Draw text centre at position 80, 90 using font 2
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// Note the x position is the top left of the font!
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// draw a floating point number
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float pi = 3.14159; // Value to print
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int precision = 3; // Number of digits after decimal point
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int xpos = 50; // x position
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int ypos = 110; // y position
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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
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xpos += tft.drawFloat(pi, precision, xpos, ypos, font); // Draw rounded number and return new xpos delta for next print position
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tft.drawString(" is pi", xpos, ypos, font); // Continue printing from new x position
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}
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}
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