From c831f1ffb378c20b7513d209d60cdd5dee9db85b Mon Sep 17 00:00:00 2001 From: Keith Packard Date: Sat, 25 Oct 2014 17:44:48 -0700 Subject: [PATCH] altos: Perform cc1200 calibration less often. Tweak radio params This performs calibration after every 4 operations, or when the frequency changes. This reduces the time it takes to get to receive mode. This also makes the sync and preamble qualifiers more strict to reject bad packets. Signed-off-by: Keith Packard --- src/drivers/ao_cc1200.c | 16 +++++++++------- src/drivers/ao_cc1200_CC1200.h | 6 +++--- 2 files changed, 12 insertions(+), 10 deletions(-) diff --git a/src/drivers/ao_cc1200.c b/src/drivers/ao_cc1200.c index 39d3d522..a3c1cbd4 100644 --- a/src/drivers/ao_cc1200.c +++ b/src/drivers/ao_cc1200.c @@ -219,18 +219,18 @@ ao_radio_idle(void) { for (;;) { uint8_t state = (ao_radio_strobe(CC1200_SIDLE) >> CC1200_STATUS_STATE) & CC1200_STATUS_STATE_MASK; - if (state == CC1200_STATUS_STATE_IDLE) { - ao_radio_strobe(CC1200_SFTX); - ao_radio_strobe(CC1200_SFRX); + if (state == CC1200_STATUS_STATE_IDLE) break; - } if (state == CC1200_STATUS_STATE_TX_FIFO_ERROR) ao_radio_strobe(CC1200_SFTX); if (state == CC1200_STATUS_STATE_RX_FIFO_ERROR) ao_radio_strobe(CC1200_SFRX); } - /* Flush any pending TX bytes */ + /* Flush any pending data in the fifos */ ao_radio_strobe(CC1200_SFTX); + ao_radio_strobe(CC1200_SFRX); + /* Make sure the RF calibration is current */ + ao_radio_strobe(CC1200_SCAL); } /* @@ -635,6 +635,8 @@ ao_radio_setup(void) ao_radio_mode = 0; + ao_radio_idle(); + ao_config_get(); ao_radio_configured = 1; @@ -666,6 +668,7 @@ ao_radio_get(uint8_t len) ao_radio_reg_write(CC1200_FREQ1, ao_config.radio_setting >> 8); ao_radio_reg_write(CC1200_FREQ0, ao_config.radio_setting); last_radio_setting = ao_config.radio_setting; + ao_radio_strobe(CC1200_SCAL); } if (ao_config.radio_rate != last_radio_rate) { ao_radio_mode &= ~AO_RADIO_MODE_BITS_PACKET; @@ -994,9 +997,8 @@ uint8_t ao_radio_recv(__xdata void *d, uint8_t size, uint8_t timeout) { ao_radio_abort = 0; - ao_radio_wake = 0; + ao_radio_get(size - 2); - ao_radio_idle(); ao_radio_set_mode(AO_RADIO_MODE_PACKET_RX); ao_radio_wake = 0; ao_radio_start_rx(); diff --git a/src/drivers/ao_cc1200_CC1200.h b/src/drivers/ao_cc1200_CC1200.h index ab642f70..c078c09d 100644 --- a/src/drivers/ao_cc1200_CC1200.h +++ b/src/drivers/ao_cc1200_CC1200.h @@ -34,7 +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) | - (12 << CC1200_SYNC_CFG1_SYNC_THR)), + (11 << 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) | @@ -46,7 +46,7 @@ CC1200_PREAMBLE_CFG0, /* Preamble Detection Configuration Reg. 0 */ ((1 << CC1200_PREAMBLE_CFG0_PQT_EN) | (CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT_11 << CC1200_PREAMBLE_CFG0_PQT_VALID_TIMEOUT) | - (12 << CC1200_PREAMBLE_CFG0_PQT)), + (6 << 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 */ @@ -60,7 +60,7 @@ CC1200_AGC_CFG0, 0x87, /* Automatic Gain Control Configuration Reg. 0 */ CC1200_FIFO_CFG, 0x40, /* FIFO Configuration */ CC1200_SETTLING_CFG, /* Frequency Synthesizer Calibration and Settling Configuration */ - ((CC1200_SETTLING_CFG_FS_AUTOCAL_IDLE_TO_ON << CC1200_SETTLING_CFG_FS_AUTOCAL) | + ((CC1200_SETTLING_CFG_FS_AUTOCAL_EVERY_4TH_TIME << CC1200_SETTLING_CFG_FS_AUTOCAL) | (CC1200_SETTLING_CFG_LOCK_TIME_75_30 << CC1200_SETTLING_CFG_LOCK_TIME) | (CC1200_SETTLING_CFG_FSREG_TIME_60 << CC1200_SETTLING_CFG_FSREG_TIME)), CC1200_FS_CFG, /* Frequency Synthesizer Configuration */ -- 2.30.2