126 lines
3.6 KiB
C++
126 lines
3.6 KiB
C++
/*
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An example showing rainbow colours on a 2.2" TFT LCD screen
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and to show a basic example of font use.
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The existing Adafruit font is still in the library
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Only new font sizes 2,4,6 and 7 are implemented in the Adafruit_GFX library.
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This examples uses the hardware SPI only. Non-hardware SPI
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is just too slow (~8 times slower!)
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Alan Senior 18/1/2015
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*/
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// These are the connections for the UNO
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//#define sclk 13 // Don't change
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//#define mosi 11 // Don't change
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#define cs 8
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#define dc 10
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#define rst 9 // you can also connect this to the Arduino reset
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#include <Adafruit_GFX_AS.h> // Core graphics library, with extra fonts.
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#include <Adafruit_ILI9341_STM.h> // STM32 DMA Hardware-specific library
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#include <SPI.h>
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Adafruit_ILI9341_STM tft = Adafruit_ILI9341_STM(cs, dc, rst); // Invoke custom library
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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.begin();
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tft.setRotation(2);
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tft.fillScreen(ILI9341_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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for (int i = 0; i<240; 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 berfore
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tft.setTextColor(ILI9341_BLACK, ILI9341_BLACK); // Note these fonts do not plot the background colour
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tft.setCursor (68, 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(ILI9341_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 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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