[examples] STM32F3 discovery board comparator example

examples/stm32f3_discovery/comp/main.cpp

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+/*
+ * Copyright (c) 2018, 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/debug/logger.hpp>
+
+#include <modm/platform/comp/comp_2.hpp>
+
+// Set the log level
+#undef	MODM_LOG_LEVEL
+#define	MODM_LOG_LEVEL modm::log::INFO
+
+// Create an IODeviceWrapper around the Uart Peripheral we want to use
+modm::IODeviceWrapper< Usart2, modm::IOBuffer::BlockIfFull > loggerDevice;
+
+// Set all four logger streams to use the UART
+modm::log::Logger modm::log::debug(loggerDevice);
+modm::log::Logger modm::log::info(loggerDevice);
+modm::log::Logger modm::log::warning(loggerDevice);
+modm::log::Logger modm::log::error(loggerDevice);
+
+int
+main()
+{
+	Board::initialize();
+	Board::LedNorth::setOutput();
+
+	// initialize Uart2 for MODM_LOG_
+	Usart2::connect<GpioOutputA2::Tx>();
+	Usart2::initialize<Board::systemClock, 115200>();
+
+	// 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;
+
+	using Comparator = modm::platform::Comp2;
+
+	Comparator::connect<GpioA7::Inp, GpioA2::Out>();
+
+	Comparator::initialize(
+			Comparator::InvertingInput::Vref1Div2,
+			Comparator::NonInvertingInput::BitUnset, // GpioA7
+			Comparator::Output::Tim1Or8BkIn2,
+			Comparator::Hysteresis::NoHysteresis,
+			Comparator::Mode::HighSpeed,
+			Comparator::Polarity::NonInverted,
+			false);
+
+	while (1)
+	{
+		modm::delayMilliseconds(250);
+		MODM_LOG_INFO << "Comparator: " << Comparator::getOutput() << modm::endl;
+		Board::LedNorth::set(Comparator::getOutput());
+	}
+
+	return 0;
+}

examples/stm32f3_discovery/comp/project.xml

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+<?xml version='1.0' encoding='UTF-8'?>
+<library>
+  <extends>../../../src/modm/board/disco_f303vc/board.xml</extends>
+  <options>
+    <option name=":build.scons:build.path">../../../build/stm32f3_discovery/blink</option>
+  </options>
+  <modules>
+    <module>:debug</module>
+    <module>:platform:uart:2</module>
+    <module>modm:platform:comp:*</module>
+    <module>:build.scons</module>
+  </modules>
+</library>