--- /dev/null
+#ifndef _RFID_READER_X501_H
+#define _RFID_READER_X501_H
+
+#define X501_CONDUCTANCE 0x3f
+#define X501_MOD_CONDUCTANCE 0x3f
+#define X501_14443A_BITPHASE 0xa9
+#define X501_14443A_THRESHOLD 0xff
+
+#define X501_14443B_BITPHASE 0xad
+#define X501_14443B_THRESHOLD 0xff
+
+
+extern int
+PC_to_RDR_Escape(void *handle,
+ const unsigned char *tx_buf, unsigned int tx_len,
+ unsigned char *rx_buf, unsigned int *rx_len);
+
+extern struct rfid_reader rfid_reader_x501;
+// extern struct rfid_asic_transport x501_ccid;
+
+#endif