+// ISO 7816-4 Basic interindustry commands. For command APDU's.
+#define ISO7816_ERASE_BINARY 0x0E
+#define ISO7816_VERIFY 0x20
+#define ISO7816_MANAGE_CHANNEL 0x70
+#define ISO7816_EXTERNAL_AUTHENTICATE 0x82
+#define ISO7816_GET_CHALLENGE 0x84
+#define ISO7816_INTERNAL_AUTHENTICATE 0x88
+#define ISO7816_SELECT_FILE 0xA4
+#define ISO7816_GET_PROCESSING_OPTIONS 0xA8
+#define ISO7816_READ_BINARY 0xB0
+#define ISO7816_READ_RECORDS 0xB2
+#define ISO7816_GET_RESPONSE 0xC0
+#define ISO7816_ENVELOPE 0xC2
+#define ISO7816_GET_DATA 0xCA
+#define ISO7816_WRITE_BINARY 0xD0
+#define ISO7816_WRITE_RECORD 0xD2
+#define ISO7816_UPDATE_BINARY 0xD6
+#define ISO7816_PUT_DATA 0xDA
+#define ISO7816_UPDATE_DATA 0xDC
+#define ISO7816_APPEND_RECORD 0xE2
+// ISO7816-4 For response APDU's
+#define ISO7816_OK 0x9000
+// 6x xx = ERROR
+#define ISO7816_MAX_FRAME_SIZE 261
+
+
+/* T55x7 configuration register definitions */
+#define T55x7_POR_DELAY 0x00000001
+#define T55x7_ST_TERMINATOR 0x00000008
+#define T55x7_PWD 0x00000010
+#define T55x7_MAXBLOCK_SHIFT 5
+#define T55x7_AOR 0x00000200
+#define T55x7_PSKCF_RF_2 0
+#define T55x7_PSKCF_RF_4 0x00000400
+#define T55x7_PSKCF_RF_8 0x00000800
+#define T55x7_MODULATION_DIRECT 0
+#define T55x7_MODULATION_PSK1 0x00001000
+#define T55x7_MODULATION_PSK2 0x00002000
+#define T55x7_MODULATION_PSK3 0x00003000
+#define T55x7_MODULATION_FSK1 0x00004000
+#define T55x7_MODULATION_FSK2 0x00005000
+#define T55x7_MODULATION_FSK1a 0x00006000
+#define T55x7_MODULATION_FSK2a 0x00007000
+#define T55x7_MODULATION_MANCHESTER 0x00008000
+#define T55x7_MODULATION_BIPHASE 0x00010000
+#define T55x7_MODULATION_DIPHASE 0x00018000
+#define T55x7_X_MODE 0x00020000
+#define T55x7_BITRATE_RF_8 0
+#define T55x7_BITRATE_RF_16 0x00040000
+#define T55x7_BITRATE_RF_32 0x00080000
+#define T55x7_BITRATE_RF_40 0x000C0000
+#define T55x7_BITRATE_RF_50 0x00100000
+#define T55x7_BITRATE_RF_64 0x00140000
+#define T55x7_BITRATE_RF_100 0x00180000
+#define T55x7_BITRATE_RF_128 0x001C0000
+
+/* T5555 (Q5) configuration register definitions */
+#define T5555_ST_TERMINATOR 0x00000001
+#define T5555_MAXBLOCK_SHIFT 0x00000001
+#define T5555_MODULATION_MANCHESTER 0
+#define T5555_MODULATION_PSK1 0x00000010
+#define T5555_MODULATION_PSK2 0x00000020
+#define T5555_MODULATION_PSK3 0x00000030
+#define T5555_MODULATION_FSK1 0x00000040
+#define T5555_MODULATION_FSK2 0x00000050
+#define T5555_MODULATION_BIPHASE 0x00000060
+#define T5555_MODULATION_DIRECT 0x00000070
+#define T5555_INVERT_OUTPUT 0x00000080
+#define T5555_PSK_RF_2 0
+#define T5555_PSK_RF_4 0x00000100
+#define T5555_PSK_RF_8 0x00000200
+#define T5555_USE_PWD 0x00000400
+#define T5555_USE_AOR 0x00000800
+#define T5555_SET_BITRATE(x) (((x-2)/2)<<12)
+#define T5555_GET_BITRATE(x) ((((x >> 12) & 0x3F)*2)+2)
+#define T5555_BITRATE_SHIFT 12 //(RF=2n+2) ie 64=2*0x1F+2 or n = (RF-2)/2
+#define T5555_FAST_WRITE 0x00004000
+#define T5555_PAGE_SELECT 0x00008000
+
+#define T55XX_WRITE_TIMEOUT 1500
+
+uint32_t GetT55xxClockBit(uint32_t clock);