Commit status quo (pending cleanup of the debug and experimental code that I added during the last week)

Change freertos code to not mask FIQ, this finally makes the FIQ working (with approx 700ns +/- 100ns latency; yeah!) and therefore reception starts working
Change to two times oversampling (keep four times oversampling code ifdef'd, extract all the magical values to a header file) because at four times oversampling every other sample is very close to 
a possible data edge and therefore not reliable


git-svn-id: https://svn.openpcd.org:2342/trunk@347 6dc7ffe9-61d6-0310-9af1-9938baff3ed1

1 files changed, 27 insertions, 0 deletions

diff --git a/openpicc/application/iso14443_layer3a.h b/openpicc/application/iso14443_layer3a.h
index 396ebe9..f76a514 100644
--- a/openpicc/application/iso14443_layer3a.h
+++ b/openpicc/application/iso14443_layer3a.h
@@ -15,4 +15,31 @@ enum ISO14443_STATES {
 	ERROR,       /* Some unrecoverable error has occured */
 };
 
+/* standard derived magic values */
+#define ISO14443A_FDT_SHORT_1	1236
+#define ISO14443A_FDT_SHORT_0	1172
+
+#ifdef FOUR_TIMES_OVERSAMPLING
+/* definitions for four-times oversampling */
+/* Sample values for the REQA and WUPA short frames */
+#define REQA	0x10410441
+#define WUPA	0x04041041
+
+/* Start of frame sample for SSC compare 0 */
+#define ISO14443A_SOF_SAMPLE	0x01
+#define ISO14443A_SOF_LEN	4
+/* Length in samples of a short frame */
+#define ISO14443A_SHORT_LEN     32
+
+#else
+/* definitions for two-times oversampling */
+#define REQA	0x18729
+#define WUPA	0x2249
+
+#define ISO14443A_SOF_SAMPLE	0x01
+#define ISO14443A_SOF_LEN	2
+#define ISO14443A_SHORT_LEN     16
+
+#endif
+
 #endif /*ISO14443_LAYER3A_H_*/