Added white bit to CC1000 and CC2420.

[tinyos-2.x.git] / tos / chips / cc1000 / CC1000Msg.h

diff --git a/tos/chips/cc1000/CC1000Msg.h b/tos/chips/cc1000/CC1000Msg.h
index 8932aa6a3d4b5b422d59f8b0bad4f03c865d15a6..a2df2697cc2e260f32fc007fec02cfce3b9011c8 100644 (file)
--- a/tos/chips/cc1000/CC1000Msg.h
+++ b/tos/chips/cc1000/CC1000Msg.h
@@ -15,9 +15,20 @@ typedef nx_struct CC1KFooter {
   nxle_uint16_t crc;  
 } cc1000_footer_t;
 
+typedef enum {
+  CC1000_ACK_BIT   = 0x1,
+  CC1000_WHITE_BIT = 0x2,
+  /* 60 comes from the mica2 data sheet (MPR/MIB guide) and Dongjin Son's work in SenSys 2006.
+     Son's work showed that a SINR of 6dB is sufficient for > 90% PRR. Figure 7-2 of the data
+     sheet shows that a 6dB difference is approximately equal to a VRSSI voltage difference of
+     0.15V. Since the battery voltage is 2.8V (approximately), 60/1024 * 2.8 is roughly equal
+     to 0.15. This deserves some experimental testing. -pal */
+  CC1000_WHITE_BIT_THRESH = 60
+} CC1KMetadataBits;
+
 typedef nx_struct CC1KMetadata {
   nx_int16_t strength_or_preamble; /* negative when used for preamble length */
-  nx_uint8_t ack;
+  nx_uint8_t metadataBits;
   nx_uint16_t time;
   nx_uint8_t sendSecurityMode;
   nx_uint8_t receiveSecurityMode;