Add libraries, picocalc notes.
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/*
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An example showing rainbow colours on a 2.2" TFT LCD screen
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and to show basic examples of font use.
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This sketch uses the GLCD, 2, 4, 6 fonts only.
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Make sure all the display driver and pin connections are correct by
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editing the User_Setup.h file in the TFT_eSPI 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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#########################################################################
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*/
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#include <TFT_eSPI.h> // Hardware-specific library
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#include <SPI.h>
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TFT_eSPI tft = TFT_eSPI(); // Invoke custom library with default width and height
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//TFT_eSPI tft = TFT_eSPI(240, 320); // Could invoke custom library declaring width and height
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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; // Colour order is RGB 5+6+5 bits each
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void setup(void) {
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Serial.begin(9600);
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tft.init();
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tft.setRotation(2);
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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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rainbow_fill(); // Fill the screen with rainbow colours
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// The standard AdaFruit font still works as before
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tft.setTextColor(TFT_BLACK); // Background is not defined so it is transparent
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tft.setCursor (60, 5);
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tft.setTextFont(0); // Select font 0 which is the Adafruit font
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tft.print("Original Adafruit font!");
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//tft.drawString("Original Adafruit font!",60,5,1);
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// The new larger fonts do not need to use the .setCursor call, coords are embedded
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tft.setTextColor(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", 120, 14, 2); // Draw text centre at position 120, 14 using font 2
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tft.drawCentreString("Font size 4", 120, 30, 4); // Draw text centre at position 120, 30 using font 4
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tft.drawCentreString("12.34", 120, 54, 6); // Draw text centre at position 120, 54 using font 6
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tft.drawCentreString("12.34 is in font size 6", 120, 92, 2); // Draw text centre at position 120, 92 using font 2
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// Note the x position is the top 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 = 90; // x position
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int ypos = 110; // y position
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int font = 2; // font number 2
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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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tft.setTextSize(1); // We are using a size multiplier of 1
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tft.setTextColor(TFT_BLACK); // Set text colour to black, no background (so transparent)
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tft.setCursor(36, 150, 4); // Set cursor to x = 36, y = 150 and use font 4
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tft.println("Transparent..."); // As we use println, the cursor moves to the next line
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tft.setCursor(30, 175); // Set cursor to x = 30, y = 175
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tft.setTextColor(TFT_WHITE, TFT_BLACK); // Set text colour to white and background to black
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tft.println("White on black");
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tft.setTextFont(4); // Select font 4 without moving cursor
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tft.setCursor(50, 210); // Set cursor to x = 50, y = 210 without changing the font
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tft.setTextColor(TFT_WHITE);
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// By using #TFT print we can use all the formatting features like printing HEX
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tft.print(57005, HEX); // Cursor does no move to next line
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tft.println(48879, HEX); // print and move cursor to next line
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tft.setTextColor(TFT_GREEN, TFT_BLACK); // This time we will use green text on a black background
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tft.setTextFont(2); // Select font 2
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//Text will wrap to the next line if needed, by luck it breaks the lines at spaces!
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tft.println(" Ode to a Small Lump of Green Putty I Found in My Armpit One Midsummer Morning ");
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}
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}
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// Fill screen with a rainbow pattern
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void rainbow_fill()
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{
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// The colours and state are not initialised so the start colour changes each time the funtion is called
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for (int i = 319; i > 0; i--) {
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// Draw a vertical line 1 pixel wide in the selected colour
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tft.drawFastHLine(0, i, tft.width(), colour); // in this example tft.width() returns the pixel width of the display
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// This is a "state machine" that ramps up/down the colour brightnesses in sequence
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switch (state) {
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case 0:
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green ++;
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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 --;
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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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}
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