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-rw-r--r--include/librfid/rfid_layer2_iso14443a.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/librfid/rfid_layer2_iso14443a.h b/include/librfid/rfid_layer2_iso14443a.h
index 50a6f43..0ff84eb 100644
--- a/include/librfid/rfid_layer2_iso14443a.h
+++ b/include/librfid/rfid_layer2_iso14443a.h
@@ -75,6 +75,14 @@ enum iso14443a_state {
ISO14443A_STATE_SELECTED,
};
+/* Section 6.1.2 values in usec, rounded up to next usec */
+#define ISO14443A_FDT_ANTICOL_LAST1 92 /* 1236 / fc = 91.15 usec */
+#define ISO14443A_FDT_ANTICOL_LAST0 87 /* 1172 / fc = 86.43 usec */
+
+#define ISO14443_CARRIER_FREQ 13560000
+#define ISO14443A_FDT_OTHER_LAST1(n) (((n*128+84)*1000000)/ISO14443_CARRIER_FREQ)
+
+
#include <librfid/rfid_layer2.h>
struct rfid_layer2 rfid_layer2_iso14443a;
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