worked on FileSystem, started to migrate logging class

ext/sd/tests/Helper.h

@@ -0,0 +1,26 @@
+#pragma once
+
+#define PLATFORM DESKTOP
+
+#include "../Types.h"
+
+struct TestDevice {
+
+	uint8_t buf[4096];
+
+	/** read a 512 byte block into dst */
+	bool readSingleBlock(LBA512 addr, uint8_t* dst) {
+		memcpy(dst, buf+addr*512, 512);
+		return true;
+	}
+
+	bool writeSingleBlock(LBA512 addr, uint8_t* src) {
+		memcpy(buf+addr*512, src, 512);
+		return true;
+	}
+
+	void reset(uint8_t val) {
+		for (int i = 0; i < sizeof(buf); ++i) {buf[i] = val;}
+	}
+
+};