Abgabe

kawaii/rfid_reader.cpp

@@ -0,0 +1,61 @@
+#include "rfid_reader.hpp"
+#include <unistd.h>
+#include <iostream>
+#include <chrono>
+#include <ctime>
+#include <chrono>
+
+rfid_reader::rfid_reader()
+	: measurement("rfid_reader")
+{
+	mfrc.PCD_Init();
+	stop_thread = false;
+	uid = 0;
+	thread = std::thread(&rfid_reader::loop, this);
+}
+
+rfid_reader::~rfid_reader()
+{
+	 using namespace std;
+	 stop_thread = true;
+     thread.join();
+}
+
+uint32_t rfid_reader::last_id() const
+{
+	return uid.load(std::memory_order::memory_order_relaxed);
+}
+
+void rfid_reader::loop()
+{
+	using namespace std::chrono;
+	
+	stop_thread = false;
+	while(!stop_thread)
+	{
+		std::this_thread::sleep_for(50ms);
+		measurement.start();
+		if(!mfrc.PICC_IsNewCardPresent())
+		{
+			continue;
+		}
+		if(!mfrc.PICC_ReadCardSerial())
+		{
+			continue;
+		}
+		
+
+		uid.store(int((unsigned char)(mfrc.uid.uidByte[0]) << 24 |
+		      (unsigned char)(mfrc.uid.uidByte[1]) << 16 |
+		      (unsigned char)(mfrc.uid.uidByte[2]) << 8  |
+		      (unsigned char)(mfrc.uid.uidByte[3])), std::memory_order::memory_order_relaxed);
+
+#ifndef NDEBUG
+		printf("\n");
+		std::time_t result = std::time(nullptr);
+		std::cout << std::asctime(std::localtime(&result));
+		printf("%X\n", last_id());
+#endif
+		measurement.stop();
+	}
+}