diff options
| author | Keith Packard <keithp@keithp.com> | 2014-10-25 10:20:07 -0700 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2014-10-25 10:20:07 -0700 |
| commit | 51ef3fad6435c0b21945d48fbbaa5a4c092c4960 (patch) | |
| tree | 32562e3f74b25a59398934d821fea7a1730a9ca8 | |
| parent | 9102183b40f0b32d4fb6d24502b79a6431184310 (diff) | |
altos: Increase PQT value for cc1200 improving sensitivity
The PQT value indicates how 'good' the preamble is; higher values
allow a lower quality of preamble to pass the test, permitting more
packets to be decoded.
Signed-off-by: Keith Packard <keithp@keithp.com>
| -rw-r--r-- | src/drivers/ao_cc1200_CC1200.h | 22 |
1 files changed, 19 insertions, 3 deletions
diff --git a/src/drivers/ao_cc1200_CC1200.h b/src/drivers/ao_cc1200_CC1200.h index 8d5c3b2a..ab642f70 100644 --- 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 */ |