[examples] Add SSD1306 SPI display example for Nucleo-G474RE

Author: rleh

examples/nucleo_g474re/ssd1306_spi/main.cpp

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+/*
+ * Copyright (c) 2023, 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/ssd1306_spi.hpp>
+
+/**
+ * SSD1306 display in SPI 4-wire mode
+ *
+ * SCK		<-> Arduino D3 / GpioB3
+ * MOSI		<-> Arduino D4 / GpioB5
+ * CS		<-> Arduino D5 / GpioB4
+ * D/C#		<-> Arduino D2 / GpioA10
+ * RESET#	<-> Arduino D7 / GpioA8
+ *
+ * En7V5	<-> Arduino D6 / GpioB10
+ *
+ * TODO: Describe charge pump setup for 7.5V
+ */
+
+using MySpiMaster = modm::platform::SpiMaster1;
+using Sck = Board::D3;
+using Mosi = Board::D4;
+using Cs = Board::D5;
+using Dc = Board::D2;
+using Reset = Board::D7;
+using En7V5 = Board::D6;
+using Display = modm::Ssd1306Spi<MySpiMaster, Cs, Dc, 32>;
+Display display;
+
+int
+main()
+{
+	Board::initialize();
+
+	En7V5::reset();
+	En7V5::setOutput();
+	Reset::reset();
+	Reset::setOutput();
+
+	Cs::setOutput();
+	Dc::setOutput();
+	MySpiMaster::connect<Sck::Sck, Mosi::Mosi>();
+	MySpiMaster::initialize<Board::SystemClock, 660_kHz>();
+
+	Cs::set();
+	En7V5::set();
+	modm::delay(500ms);
+
+	Reset::set();
+	modm::delay(1ms);
+
+	RF_CALL_BLOCKING(display.initialize());
+	RF_CALL_BLOCKING(display.setOrientation(modm::glcd::Orientation::Landscape0));
+	RF_CALL_BLOCKING(display.setDisplayMode(Display::DisplayMode::Inverted));
+	RF_CALL_BLOCKING(display.setContrast(80));
+
+	display.setFont(modm::font::Assertion);
+
+	modm::ShortPeriodicTimer timer(333ms);
+	uint16_t counter(0);
+
+	while (true)
+	{
+		if (timer.execute())
+		{
+			display.clear();
+			display.setCursor(1, 1);
+			display << "Hello World!";
+			display.setCursor(1,17);
+			display << counter++;
+
+			display.update();
+		}
+	}
+
+	return 0;
+}

examples/nucleo_g474re/ssd1306_spi/project.xml

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+<library>
+  <extends>modm:nucleo-g474re</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_g474re/ssd1306_spi</option>
+  </options>
+  <modules>
+    <module>modm:driver:ssd1306.spi</module>
+    <module>modm:platform:gpio</module>
+    <module>modm:platform:spi:1</module>
+    <module>modm:build:scons</module>
+  </modules>
+</library>