[example] Add STUSB4500 USB-PD example for STM32F072 Discovery board

examples/stm32f072_discovery/stusb4500/main.cpp

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+/*
+ * Copyright (c) 2021, 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/driver/usb/stusb4500.hpp>
+
+modm::IODeviceWrapper< Usart1, modm::IOBuffer::BlockIfFull > loggerDevice;
+#undef	MODM_LOG_LEVEL
+#define	MODM_LOG_LEVEL modm::log::INFO
+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);
+
+using Sda = GpioB7;
+using Scl = GpioB6;
+using MyI2cMaster = I2cMaster1;
+
+modm::Stusb4500<MyI2cMaster> usb{};
+
+int
+main()
+{
+	Board::initialize();
+
+	// Enable USART 1 (TX only)
+	Usart1::connect<GpioOutputA9::Tx>();
+	Usart1::initialize<Board::SystemClock, 115200_Bd>();
+
+	MODM_LOG_INFO << "STM32F072 Discovery Example: USB-PD with STUSB4500 chip" << modm::endl;
+
+	MyI2cMaster::connect<Scl::Scl, Sda::Sda>();
+	MyI2cMaster::initialize<Board::SystemClock, 400_kHz>();
+
+	Board::LedUp::set();
+
+	RF_CALL_BLOCKING(usb.configurePdo(1, 5000, 500)); // must be set to 5V according to USB standard
+	RF_CALL_BLOCKING(usb.configurePdo(2, 20000, 1500)); // 20V, 1.5A -> 30W
+	RF_CALL_BLOCKING(usb.configurePdo(3, 20000, 4000)); // 20V, 4A -> 80W
+
+	RF_CALL_BLOCKING(usb.setValidPdo(3)); // we prefer PDO 3 (more current)
+
+	modm::delay(200ms);
+
+	// check results
+	modm::stusb4500::RdoRegStatusData status = RF_CALL_BLOCKING(usb.getRdoRegStatus());
+
+	MODM_LOG_INFO << "Maximum current: " << status.MaxCurrent << " mA" << modm::endl;
+
+	Board::LedDown::set();
+
+	while (true) {
+		Board::LedRight::toggle();
+		modm::delay(1000ms);
+	}
+}

examples/stm32f072_discovery/stusb4500/project.xml

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+<library>
+  <extends>modm:disco-f072rb</extends>
+  <options>
+    <option name="modm:build:build.path">../../../build/stm32f072_discovery/stusb4500</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:debug</module>
+    <module>modm:driver:stusb4500</module>
+    <module>modm:platform:i2c:1</module>
+    <module>modm:platform:uart:1</module>
+  </modules>
+</library>