[example] Add MCP990x temperature sensor example

examples/nucleo_f303re/temperature_mcp990x/main.cpp

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+/*
+ * Copyright (c) 2022, Christopher Durand
+ *
+ * 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>
+#include <modm/driver/temperature/mcp990x.hpp>
+
+using namespace Board;
+using namespace std::literals;
+
+using I2c = I2cMaster2;
+using Sda = GpioA10;
+using Scl = GpioOutputA9;
+
+int main()
+{
+	Board::initialize();
+	LedD13::setOutput();
+
+	I2c::connect<Sda::Sda, Scl::Scl>();
+	I2c::initialize<Board::SystemClock, 400_kHz>();
+
+	MODM_LOG_INFO << "Welcome to MCP9902/3/4 Test" << modm::endl;
+
+	modm::mcp990x::Data data{};
+	// I2C address MCP990xT-1: 0x4c, -2: 0x4d, -A: adjustable, see datasheet
+	modm::Mcp990x<I2c> sensor{data, 0x4d};
+
+	// wait for sensor boot-up time
+	modm::delay(15ms);
+
+	bool success = RF_CALL_BLOCKING(sensor.initialize());
+	if (!success)
+	{
+		MODM_LOG_ERROR << "Initialization failed" << modm::endl;
+	}
+
+	modm::PeriodicTimer timer{500ms};
+	while (true)
+	{
+		if (timer.execute())
+		{
+			if (RF_CALL_BLOCKING(sensor.readInternalTemperature()))
+			{
+				MODM_LOG_INFO.printf("temperature: %3.3f\n °C\n", data.getTemperature());
+			}
+			else
+			{
+				MODM_LOG_INFO << "Reading temperature failed!\n";
+			}
+		}
+	}
+
+	return 0;
+}
+

examples/nucleo_f303re/temperature_mcp990x/project.xml

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+<library>
+  <extends>modm:nucleo-f303re</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_f303re/temperature_mcp990x</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:platform:i2c:2</module>
+    <module>modm:driver:mcp990x</module>
+    <module>modm:processing:timer</module>
+  </modules>
+</library>