main.cpp

/*
 * Copyright (c) 2016-2017, Niklas Hauser
 *
 * This file is part of the modm project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 */
// ----------------------------------------------------------------------------

#include <modm/board.hpp>
#include <modm/processing.hpp>

using namespace Board;
using namespace modm::glcd;
using namespace Board::ft6;

class LineDrawer : public modm::Fiber<>
{
public:
	LineDrawer() :
		Fiber([this]{ update(); }),
		display{Board::getDisplay()}
		{}

	void
	update()
	{
		if (not touch.ping()) touch.setAddress(TouchAddress2);

		// Configure the touchscreen to sample with 60Hz in active and monitor mode.
		touch.configure(Touch::InterruptMode::Trigger, 60, 60);

		while (true)
		{
			do {
				// Wait for either touchscreen interrupt or clear screen button
				modm::this_fiber::poll([&]{ return Int::read() or Button::read(); });
				if (Button::read()) display.clear();
			} while (not Int::read());

			LedRed::set();

			touch.readTouches();

			for (int ii=0; ii < 2; ii++)
			{
				Touch::touch_t tp;
				touch.getData().getTouch(&tp, ii);
				// mirror and rotate correctly
				uint16_t x{tp.y}, y{uint16_t(480 - tp.x)};

				if (tp.event == Touch::Event::PressDown or (px[tp.id] < 0))
				{
					// remember the start point
					px[tp.id] = x; py[tp.id] = y;
				}
				else if (tp.event == Touch::Event::Contact)
				{
					// draw the line from the previous point to this one
					display.setColor(c[tp.id]);
					display.drawLine(px[tp.id], py[tp.id], x, y);
					// remember this point for next time.
					px[tp.id] = x; py[tp.id] = y;
				}
				else if (tp.event == Touch::Event::LiftUp)
				{
					// invalidate points
					px[tp.id] = -1; py[tp.id] = -1;
					// generate new random color
					c[tp.id] = modm::color::Rgb565(uint16_t(rand()));
				}
			}
			LedRed::reset();
		}
	}

private:
	Touch::Data touchData;
	Touch touch{touchData, TouchAddress};
	modm::ColorGraphicDisplay& display;
	int16_t px[2]{-1, -1}, py[2]{-1, -1};
	modm::color::Rgb565 c[2]{modm::color::html::White, modm::color::html::White};
} drawer;

modm_faststack modm::Fiber fiber_blinky([]
{
	Board::LedGreen::setOutput();
	while(true)
	{
		Board::LedGreen::toggle();
		modm::this_fiber::sleep_for(20ms);
	}
});

// ----------------------------------------------------------------------------
int
main()
{
	Board::initialize();
	Board::initializeDisplay();
	Board::initializeTouchscreen();

	modm::fiber::Scheduler::run();
	return 0;
}