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50 lines
1.5 KiB
C++
50 lines
1.5 KiB
C++
// Paint application - Demonstate both TFT and Touch Screen
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#include <stdint.h>
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#include <SeeedTouchScreen.h>
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#include <TFTv2.h>
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#include <SPI.h>
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int ColorPaletteHigh = 30;
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int color = WHITE; //Paint brush color
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unsigned int colors[8] = {BLACK, RED, GREEN, BLUE, CYAN, YELLOW, WHITE, GRAY1};
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// For better pressure precision, we need to know the resistance
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// between X+ and X- Use any multimeter to read it
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// The 2.8" TFT Touch shield has 300 ohms across the X plate
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TouchScreen ts = TouchScreen(XP, YP, XM, YM); //init TouchScreen port pins
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void setup() {
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Tft.TFTinit(); //init TFT library
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Serial.begin(115200);
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//Draw the pallet
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for (int i = 0; i < 8; i++) {
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Tft.fillRectangle(i * 30, 0, 30, ColorPaletteHigh, colors[i]);
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}
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}
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void loop() {
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// a point object holds x y and z coordinates.
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Point p = ts.getPoint();
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//map the ADC value read to into pixel co-ordinates
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p.x = map(p.x, TS_MINX, TS_MAXX, 0, 240);
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p.y = map(p.y, TS_MINY, TS_MAXY, 0, 320);
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// we have some minimum pressure we consider 'valid'
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// pressure of 0 means no pressing!
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if (p.z > __PRESURE) {
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// Detect paint brush color change
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if (p.y < ColorPaletteHigh + 2) {
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color = colors[p.x / 30];
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} else {
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Tft.fillCircle(p.x, p.y, 2, color);
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}
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}
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}
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/*********************************************************************************************************
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END FILE
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*********************************************************************************************************/
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