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ladyadaladyada
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featherwing drawing demo
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‎examples/touchpaint_featherwing/touchpaint_featherwing.ino

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/***************************************************
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This is our touchscreen painting example for the Adafruit TFT FeatherWing
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----> http://www.adafruit.com/products/3315
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Check out the links above for our tutorials and wiring diagrams
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Adafruit invests time and resources providing this open source code,
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please support Adafruit and open-source hardware by purchasing
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products from Adafruit!
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Written by Limor Fried/Ladyada for Adafruit Industries.
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MIT license, all text above must be included in any redistribution
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****************************************************/
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#include <SPI.h>
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#include <Wire.h> // this is needed even tho we aren't using it
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#include <Adafruit_GFX.h> // Core graphics library
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#include <Adafruit_ILI9341.h> // Hardware-specific library
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#include <Adafruit_STMPE610.h>
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#ifdef ESP8266
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#define STMPE_CS 16
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#define TFT_CS 0
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#define TFT_DC 15
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#define SD_CS 2
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#endif
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#ifdef __AVR_ATmega32U4__
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#define STMPE_CS 6
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#define TFT_CS 9
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#define TFT_DC 10
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#define SD_CS 5
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#endif
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#ifdef ARDUINO_SAMD_FEATHER_M0
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#define STMPE_CS 6
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#define TFT_CS 9
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#define TFT_DC 10
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#define SD_CS 5
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#endif
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#ifdef TEENSYDUINO
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#define TFT_DC 10
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#define TFT_CS 4
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#define STMPE_CS 3
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#define SD_CS 8
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#endif
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#ifdef ARDUINO_STM32_FEATHER
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#define TFT_DC PB4
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#define TFT_CS PA15
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#define STMPE_CS PC7
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#define SD_CS PC5
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#endif
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Adafruit_ILI9341 tft = Adafruit_ILI9341(TFT_CS, TFT_DC);
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Adafruit_STMPE610 ts = Adafruit_STMPE610(STMPE_CS);
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// This is calibration data for the raw touch data to the screen coordinates
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#define TS_MINX 3800
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#define TS_MAXX 100
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#define TS_MINY 100
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#define TS_MAXY 3750
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// Size of the color selection boxes and the paintbrush size
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#define BOXSIZE 40
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#define PENRADIUS 3
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int oldcolor, currentcolor;
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void setup(void) {
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Serial.begin(115200);
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delay(10);
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Serial.println("FeatherWing TFT");
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if (!ts.begin()) {
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Serial.println("Couldn't start touchscreen controller");
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while (1);
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}
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Serial.println("Touchscreen started");
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tft.begin();
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tft.fillScreen(ILI9341_BLACK);
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// make the color selection boxes
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tft.fillRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_RED);
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tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_YELLOW);
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tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_GREEN);
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tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_CYAN);
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tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_BLUE);
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tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_MAGENTA);
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// select the current color 'red'
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tft.drawRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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currentcolor = ILI9341_RED;
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}
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void loop() {
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// Retrieve a point
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TS_Point p = ts.getPoint();
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Serial.print("X = "); Serial.print(p.x);
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Serial.print("\tY = "); Serial.print(p.y);
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Serial.print("\tPressure = "); Serial.println(p.z);
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// Scale from ~0->4000 to tft.width using the calibration #'s
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p.x = map(p.x, TS_MINX, TS_MAXX, 0, tft.width());
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p.y = map(p.y, TS_MINY, TS_MAXY, 0, tft.height());
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if (p.y < BOXSIZE) {
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oldcolor = currentcolor;
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if (p.x < BOXSIZE) {
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currentcolor = ILI9341_RED;
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tft.drawRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*2) {
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currentcolor = ILI9341_YELLOW;
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tft.drawRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*3) {
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currentcolor = ILI9341_GREEN;
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tft.drawRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*4) {
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currentcolor = ILI9341_CYAN;
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tft.drawRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*5) {
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currentcolor = ILI9341_BLUE;
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tft.drawRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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} else if (p.x < BOXSIZE*6) {
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currentcolor = ILI9341_MAGENTA;
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tft.drawRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_WHITE);
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}
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if (oldcolor != currentcolor) {
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if (oldcolor == ILI9341_RED)
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tft.fillRect(0, 0, BOXSIZE, BOXSIZE, ILI9341_RED);
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if (oldcolor == ILI9341_YELLOW)
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tft.fillRect(BOXSIZE, 0, BOXSIZE, BOXSIZE, ILI9341_YELLOW);
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if (oldcolor == ILI9341_GREEN)
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tft.fillRect(BOXSIZE*2, 0, BOXSIZE, BOXSIZE, ILI9341_GREEN);
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if (oldcolor == ILI9341_CYAN)
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tft.fillRect(BOXSIZE*3, 0, BOXSIZE, BOXSIZE, ILI9341_CYAN);
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if (oldcolor == ILI9341_BLUE)
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tft.fillRect(BOXSIZE*4, 0, BOXSIZE, BOXSIZE, ILI9341_BLUE);
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if (oldcolor == ILI9341_MAGENTA)
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tft.fillRect(BOXSIZE*5, 0, BOXSIZE, BOXSIZE, ILI9341_MAGENTA);
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}
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}
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if (((p.y-PENRADIUS) > 0) && ((p.y+PENRADIUS) < tft.height())) {
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tft.fillCircle(p.x, p.y, PENRADIUS, currentcolor);
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}
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}

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