altos: Increase PQT value for cc1200 improving sensitivity

[fw/altos] / src / drivers / ao_cc1200_CC1200.h

diff --git a/src/drivers/ao_cc1200_CC1200.h b/src/drivers/ao_cc1200_CC1200.h
index 8d5c3b2ae54223ff9eddd3c893749974987533c6..ab642f70878a167d983b3f8c7412178a892ee582 100644 (file)
--- a/src/drivers/ao_cc1200_CC1200.h
+++ b/src/drivers/ao_cc1200_CC1200.h
@@ -7,6 +7,22 @@
  *
  ***************************************************************/
 
+/*
+ * Values affecting receive sensitivity:
+ *
+ *
+ *     PQT             - sets how good the preamble needs to look before
+ *                       we start looking for a sync word
+ *     SYNC_THR        - sets how good the sync needs to be before we
+ *                       start decoding a packet
+ */
+
+/* Values depending on data rate
+ *
+ *     DCFILT_BW_SETTLE
+ *     DCFILT_BW
+ */
+
 #ifndef AO_CC1200_AGC_GAIN_ADJUST
 #define AO_CC1200_AGC_GAIN_ADJUST      -81
 #endif
@@ -18,7 +34,7 @@
         CC1200_SYNC0,                        0x91,       /* Sync Word Configuration [7:0] */
         CC1200_SYNC_CFG1,                                /* Sync Word Detection Configuration Reg. 1 */
                ((CC1200_SYNC_CFG1_SYNC_MODE_16_BITS << CC1200_SYNC_CFG1_SYNC_MODE) |
-                (0xc << CC1200_SYNC_CFG1_SYNC_THR)),
+                (12 << CC1200_SYNC_CFG1_SYNC_THR)),
         CC1200_SYNC_CFG0,                                /* Sync Word Detection Configuration Reg. 0 */
                ((1 << CC1200_SYNC_CFG0_AUTO_CLEAR) |
                 (0 << CC1200_SYNC_CFG0_RX_CONFIG_LIMITATION) |
@@ -29,8 +45,8 @@
         CC1200_DCFILT_CFG,                   0x5d,       /* Digital DC Removal Configuration */
         CC1200_PREAMBLE_CFG0,                           /* Preamble Detection Configuration Reg. 0 */
                ((1 << CC1200_PREAMBLE_CFG0_PQT_EN) |
-                (CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT_24 << CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT) |
-                (2 << CC1200_PREAMBLE_CFG0_PQT)),
+                (CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT_11 << CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT) |
+                (12 << CC1200_PREAMBLE_CFG0_PQT)),
         CC1200_IQIC,                         0xcb,       /* Digital Image Channel Compensation Configuration */
         CC1200_CHAN_BW,                      0x11,       /* Channel Filter Configuration */
         CC1200_MDMCFG1,                      0x40,       /* General Modem Parameter Configuration Reg. 1 */