[examples] Add example with TinyUSB and FreeRTOS (for Nucleo-F429ZI)

examples/nucleo_f429zi/usb_freetros/main.cpp

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2022, 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 <tusb.h>
+
+#include <modm/board.hpp>
+#include <modm/processing/rtos.hpp>
+#include <modm/processing/timer/periodic_timer.hpp>
+
+using namespace Board;
+
+class SomeTask : modm::rtos::Thread
+{
+public:
+	SomeTask() : Thread(configMAX_PRIORITIES - 1, 2048, "some_task") {}
+
+	void
+	run()
+	{
+		modm::PeriodicTimer tmr{2.5s};
+		uint8_t counter{0};
+
+		while (1)
+		{
+			if (tmr.execute())
+			{
+				MODM_LOG_INFO << "Hello World from USB: " << (counter++) << modm::endl;
+			}
+		}
+
+		vTaskDelete(0);
+	}
+};
+
+class UsbTask : modm::rtos::Thread
+{
+public:
+	UsbTask()
+		: Thread(configMAX_PRIORITIES - 1, 2048, "usb_task"),
+		  usb_io_device0{},
+		  usb_stream0{usb_io_device0}
+	{}
+
+	void
+	run()
+	{
+		Board::initializeUsbFs();
+		tusb_init();
+
+		modm::PeriodicTimer tmr{2.5s};
+		uint8_t counter{0};
+
+		while (1)
+		{
+			tud_task();
+			if (tmr.execute())
+			{
+				usb_stream0 << "Hello World from USB: " << (counter++) << modm::endl;
+			}
+		}
+
+		vTaskDelete(0);
+	}
+
+private:
+	modm::IODeviceWrapper<UsbUart0, modm::IOBuffer::DiscardIfFull> usb_io_device0;
+	modm::IOStream usb_stream0;
+};
+
+SomeTask someTask;
+UsbTask usbTask;
+
+int
+main()
+{
+	Board::initialize();
+	Leds::setOutput();
+	MODM_LOG_INFO << "Nucleo-F429ZI: TinyUSB & FreeRTOS example" << modm::endl;
+
+	modm::rtos::Scheduler::schedule();
+
+	// we should never get here
+	return 0;
+}

examples/nucleo_f429zi/usb_freetros/project.xml

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+<library>
+  <extends>modm:nucleo-f429zi</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_f429zi/usb_freetros</option>
+    <option name="modm:tinyusb:config">device.cdc</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:freertos</module>
+    <module>modm:processing:rtos</module>
+    <module>modm:processing:timer</module>
+    <module>modm:tinyusb</module>
+  </modules>
+</library>