public String instructionToString(byte instr) {
		switch (instr) {
		case IN_DATA_EXCHANGE:
			return "IN_DATA_EXCHANGE";
		case IN_RELEASE:
			return "IN_RELEASE";
		case IN_JUMP_FOR_DEP:
			return "IN_JUMP_FOR_DEP";
		case TG_GET_DATA:
			return "TG_GET_DATA";
		case TG_INIT_AS_TARGET:
			return "TG_INIT_AS_TARGET";
		case TG_SET_DATA:
			return "TG_SET_DATA";
		default:
			return "UNKNOWN INSTRUCTION (" + NFCIPUtils.byteToString(instr)
					+ ")";
		}
	}