[examples] Add Nucleo-G431RB blink and graphics examples

examples/nucleo_g431rb/blink/main.cpp

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+/*
+ * Copyright (c) 2020, Raphael Lehmann
+ *
+ * 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>
+
+using namespace Board;
+
+int
+main()
+{
+	Board::initialize();
+	LedD13::setOutput();
+
+	// Use the logging streams to print some messages.
+	// Change MODM_LOG_LEVEL above to enable or disable these messages
+	MODM_LOG_DEBUG   << "debug"   << modm::endl;
+	MODM_LOG_INFO    << "info"    << modm::endl;
+	MODM_LOG_WARNING << "warning" << modm::endl;
+	MODM_LOG_ERROR   << "error"   << modm::endl;
+
+	uint32_t counter(0);
+
+	while (true)
+	{
+		LedD13::toggle();
+		modm::delay(Button::read() ? 100ms : 500ms);
+
+		MODM_LOG_INFO << "loop: " << counter++ << modm::endl;
+	}
+
+	return 0;
+}

examples/nucleo_g431rb/blink/project.xml

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+<library>
+  <extends>modm:nucleo-g431rb</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_g431rb/blink</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+  </modules>
+</library>

examples/nucleo_g431rb/graphics/main.cpp

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+/*
+ * Copyright (c) 2020, Raphael Lehmann
+ *
+ * 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/driver/display/ili9341_spi.hpp>
+using namespace Board;
+
+namespace display
+{
+	using Spi = SpiMaster1;
+	using Cs = modm::platform::GpioA3;
+	using Sck = modm::platform::GpioA5;
+	using Miso = modm::platform::GpioA6;
+	using Mosi = modm::platform::GpioA7;
+	using DataCommands = modm::platform::GpioA10;
+	using Reset = modm::platform::GpioA2;
+	using Backlight = modm::platform::GpioB3;
+}
+
+modm::Ili9341Spi<
+	display::Spi,
+	display::Cs,
+	display::DataCommands,
+	display::Reset,
+	display::Backlight
+> tft;
+
+/*
+ * Blinks the green user LED with 1 Hz.
+ * It is on for 90% of the time and off for 10% of the time.
+ */
+
+int
+main()
+{
+	using namespace modm::literals;
+	Board::initialize();
+	display::Spi::connect<
+		display::Sck::Sck, display::Miso::Miso, display::Mosi::Mosi>();
+	display::Spi::initialize<SystemClock, 1328_kHz>();
+	tft.initialize();
+	LedD13::set();
+	tft.setColor(modm::glcd::Color::black());
+	int16_t w = tft.getWidth();
+	int16_t h = tft.getHeight();
+	tft.drawLine({0,0}, {w, h});
+	tft.drawLine({w,0}, {0, h});
+
+	while (true)
+	{
+		LedD13::set();
+		modm::delay(900ms);
+
+		LedD13::reset();
+		modm::delay(100ms);
+	}
+
+	return 0;
+}

examples/nucleo_g431rb/graphics/project.xml

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+<library>
+  <extends>modm:nucleo-g431rb</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_g431rb/graphics</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:driver:ili9341</module>
+    <module>modm:platform:spi:1</module>
+  </modules>
+</library>