added EM4x50 info function

armsrc/em4x50.h

@@ -0,0 +1,22 @@
+//-----------------------------------------------------------------------------
+// Copyright (C) 2020 tharexde
+//
+// This code is licensed to you under the terms of the GNU GPL, version 2 or,
+// at your option, any later version. See the LICENSE.txt file for the text of
+// the license.
+//-----------------------------------------------------------------------------
+// Low frequency EM4x50 commands
+//-----------------------------------------------------------------------------
+
+#ifndef EM4X50_H
+#define EM4X50_H
+
+#include "../include/em4x50.h"
+
+typedef struct {
+    uint8_t sectors[34][7];
+} em4x50_tag_t;
+
+void em4x50_info(em4x50_data_t *etd);
+
+#endif /* EM4X50_H */