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

Author: rleh

examples/nucleo_f429zi/usb_freertos/main.cpp

@@ -0,0 +1,101 @@
+/*
+ * 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(2, 2048, "some_task") {}
+
+	void
+	run()
+	{
+		modm::PeriodicTimer tmr{2.5s};
+		uint8_t counter{0};
+
+		while (1)
+		{
+			if (tmr.execute())
+			{
+				MODM_LOG_INFO << "SomeTask: Hello via Uart, counter=" << (counter++) << modm::endl;
+			}
+
+			vTaskDelay(1);
+		}
+
+		vTaskDelete(0);
+	}
+};
+
+class UsbTask : modm::rtos::Thread
+{
+public:
+	UsbTask() : Thread(1, 2048, "usb_task"), usb_io_device0{}, usb_stream0{usb_io_device0} {}
+
+	void
+	run()
+	{
+		MODM_LOG_INFO << "USBTask: Calling Board::initializeUsbFs() ..." << modm::endl;
+		Board::initializeUsbFs(4);
+		MODM_LOG_INFO << "USBTask: Calling tusb_init() ..." << modm::endl;
+		tusb_init();
+		MODM_LOG_INFO << "... done!" << modm::endl;
+
+		modm::PeriodicTimer tmr{2.5s};
+		uint8_t counter{0};
+
+		while (1)
+		{
+			tud_task();
+			if (tmr.execute())
+			{
+				MODM_LOG_INFO << "UsbTask: Hello via Uart, counter=" << counter << modm::endl;
+				usb_stream0 << "UsbTask: Hello via USB CDC, counter=" << counter << modm::endl;
+				counter++;
+			}
+
+			vTaskDelay(1);
+		}
+
+		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_LOG_INFO << "WARNING!" << modm::endl;
+	MODM_LOG_INFO << "TinyUSB in modm does not currently use the FreeRTOS abstraction layer";
+	MODM_LOG_INFO << " and is not thread-safe with FreeRTOS threads." << modm::endl;
+
+	modm::rtos::Scheduler::schedule();
+
+	// we should never get here
+	return 0;
+}

examples/nucleo_f429zi/usb_freertos/project.xml

@@ -0,0 +1,17 @@
+<library>
+  <extends>modm:nucleo-f429zi</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/nucleo_f429zi/usb_freertos</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>
+  <collectors>
+    <collect name="modm:build:cppdefines">CFG_TUSB_DEBUG=2</collect>
+  </collectors>
+</library>