[example] Testing multicore clock on RP2040

examples/rp_pico/mcblink/main.cpp

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+/*
+ * Copyright (c) 2023, 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/debug/logger.hpp>
+#include <modm/processing.hpp>
+#include <mutex>
+
+// Create an IODeviceWrapper around the Uart Peripheral we want to use
+modm::IODeviceWrapper<Uart0, modm::IOBuffer::BlockIfFull> loggerDevice;
+modm::log::Logger modm::log::info(loggerDevice);
+modm::log::Logger modm::log::error(loggerDevice);
+
+multicore::Mutex log_mutex;
+uint32_t counter{};
+
+void
+core1_main()
+{
+	modm::PrecisePeriodicTimer tmr(0.100990s);
+	uint32_t us_counter{};
+
+	while (true)
+	{
+		const uint32_t us = modm::PreciseClock::now().time_since_epoch().count();
+		if (us < us_counter)
+		{
+			std::lock_guard<multicore::Mutex> g(log_mutex);
+			MODM_LOG_ERROR << us << " < " << us_counter << modm::endl;
+		}
+		us_counter = us;
+
+		if (tmr.execute())
+		{
+			Board::LedGreen::set();
+			std::lock_guard<multicore::Mutex> g(log_mutex);
+			MODM_LOG_INFO << "loop: " << counter++ << modm::endl;
+		}
+	}
+}
+
+// ----------------------------------------------------------------------------
+int
+main()
+{
+	Board::initialize();
+	Board::LedGreen::setOutput();
+	// initialize Uart0 for MODM_LOG_*
+	Uart0::connect<GpioOutput0::Tx>();
+	Uart0::initialize<Board::SystemClock, 115200_Bd>();
+
+	multicore::Core1::run(core1_main);
+
+	modm::PrecisePeriodicTimer tmr(0.1002284s);
+	uint32_t us_counter{};
+
+	while (true)
+	{
+		{
+			const uint32_t us = modm::PreciseClock::now().time_since_epoch().count();
+			if (us < us_counter)
+			{
+				std::lock_guard<multicore::Mutex> g(log_mutex);
+				MODM_LOG_ERROR << us << " < " << us_counter << modm::endl;
+			}
+			us_counter = us;
+		}
+
+		if (tmr.execute())
+		{
+			Board::LedGreen::reset();
+			std::lock_guard<multicore::Mutex> g(log_mutex);
+			MODM_LOG_INFO << "loop: " << counter++ << modm::endl;
+		}
+	}
+
+	return 0;
+}

examples/rp_pico/mcblink/project.xml

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+<library>
+  <extends>modm:rp-pico</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/rp_pico/mcblink</option>
+  </options>
+  <modules>
+    <module>modm:debug</module>
+    <module>modm:processing:timer</module>
+    <module>modm:platform:multicore</module>
+    <module>modm:platform:uart:0</module>
+    <module>modm:build:scons</module>
+  </modules>
+</library>