[example] Add AT24MAC402 example for ATSAMV71 Xplained Ultra

examples/samv71_xplained_ultra/i2c-eeprom/at24mac402/main.cpp

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+/*
+ * Copyright (c) 2023, Christopher Durand
+ *
+ * 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/driver/storage/at24mac402.hpp>
+#include <array>
+
+using namespace Board;
+using namespace modm::literals;
+
+// On board AT24MAC402 EEPROM driver example
+int main()
+{
+	Board::initialize();
+
+	MODM_LOG_INFO << "AT24MAC402 Test" << modm::endl;
+
+	/* Defined in board support package:
+	 * using Sda = GpioA3;
+	 * using Scl = GpioA4;
+	 * using I2c = I2cMaster0;
+	 */
+	I2c::connect<Sda::Twd, Scl::Twck>();
+	I2c::initialize<SystemClock, 400_kHz>();
+
+	// address 0x57 = 1 0 1 0 A0 A1 A2
+	// with A0 = A1 = A2 = 1 connected to 3.3V
+	modm::At24Mac402<I2c> eeprom{0x57};
+
+	MODM_LOG_INFO << "EEPROM detected: " << RF_CALL_BLOCKING(eeprom.ping()) << "\n\n";
+
+	std::array<uint8_t, 6> buffer{};
+
+	// Read pre-programmed MAC address
+	bool readSuccess = RF_CALL_BLOCKING(eeprom.readMac(buffer));
+	if (readSuccess)
+	{
+		MODM_LOG_INFO.printf("MAC: %02x:%02x:%02x:%02x:%02x:%02x\n\n",
+							 buffer[0], buffer[1], buffer[2],
+							 buffer[3], buffer[4], buffer[5]);
+
+	}
+	else
+	{
+		MODM_LOG_INFO << "Reading MAC address from EEPROM failed!\n";
+	}
+
+	// Write 4 data bytes to address 0x80
+	/*constexpr std::array<uint8_t, 4> data = {0xAA, 0xBB, 0xCC, 0xDD};
+	const bool writeSuccess = RF_CALL_BLOCKING(eeprom.write(0x80, data.data(), 4));
+	MODM_LOG_INFO << "write successful: " << writeSuccess << "\n\n";*/
+
+	// Read 4 data bytes from address 0x80
+	// retry read until device responds after finishing previous write
+	readSuccess = false;
+	while (!readSuccess)
+	{
+		readSuccess = RF_CALL_BLOCKING(eeprom.read(0x80, buffer.data(), buffer.size()));
+	}
+	MODM_LOG_INFO.printf("data: 0x%02x 0x%02x 0x%02x 0x%02x\n\n",
+						 buffer[0], buffer[1], buffer[2], buffer[3]);
+
+	while (true)
+	{
+		Led0::toggle();
+		Led1::toggle();
+		modm::delay(500ms);
+	}
+
+	return 0;
+}

examples/samv71_xplained_ultra/i2c-eeprom/at24mac402/project.xml

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+<library>
+  <extends>modm:samv71-xplained-ultra</extends>
+  <options>
+    <option name="modm:build:build.path">../../../../build/samv71_xplained_ultra/i2c_eeprom_at24mac402</option>
+  </options>
+  <modules>
+    <module>modm:build:scons</module>
+    <module>modm:driver:at24mac402</module>
+    <module>modm:platform:i2c:0</module>
+  </modules>
+</library>