mjb/altos/src/drivers, branch bdale-altosdroid

altos: Adjust CC1200 RSSI reporting value

2014-12-23T01:11:51+00:00

On the test setup, we were about 13dB off, so tweak the settings to suit. This result wasn't tested; it's just a rough offset until we get a production run of TeleDongle boards back to do more systematic measurements. Signed-off-by: Keith Packard

altos: Document cc115l power measured at RF setting 0x03 as -31.75dBm

2014-12-23T01:10:33+00:00

We built a custom TeleGPS load for radio sensitivity measurements with the lowest documented power level setting (0x03), and measured the power out at that value of -31.75dBm on the test board. Signed-off-by: Keith Packard

altos/cc1200: With PQT wide open, we can't use PQT_REACHED for start

2014-11-24T02:56:40+00:00

Because we're allowing even signals only weakly correlated with the preamble through to sync detection, we can't use the PQT_REACHED symbol to tell when a packet header has been seen. Instead, just look for SYNC_FOUND. Signed-off-by: Keith Packard

altos/cc1200: Open up preamble detect to improve sensitivity

2014-11-24T02:50:57+00:00

Increase soft decision PQT value to max (15) to ensure that we detect even weak packets. Signed-off-by: Keith Packard

altos/cc1200: Wait for packet to be placed in FIFO during receive

2014-11-24T02:31:15+00:00

This changes the receive code to use MCU_STATUS, waiting for MARC_STATUS1 to indicate that the packet is in the fifo before reading it out. It also fixes the receive timeout code to keep receiving if the preamble or sync have been seen when the timeout fires. This makes TeleLCO able to use short timeouts during scanning while still successfully receiving packets. Signed-off-by: Keith Packard

altos: Reset interrupt flags before TX in CC1200 driver

2014-11-07T04:04:47+00:00

Failing to reset the flags set during interrupt leads to short-circuiting transmission and not a lot of packets going out. Signed-off-by: Keith Packard

altos: Use AO_SPO_SPEED_FAST for CC1200

2014-11-07T00:01:24+00:00

This asks for the fastest available SPI speed, instead of fixing it to 8MHz, which may not be supported on every architecture. Signed-off-by: Keith Packard

altos: Stop attempting to ramp power on CC115L

2014-11-07T00:00:06+00:00

The PA register on the 115L isn't in any way monotonic, making the old code broken. Just rempve it instead of fixing it; we don't ramp anywhere else... Signed-off-by: Keith Packard

altos: Increase CC1200 SPI data rate to 8MHz

2014-10-26T04:14:25+00:00

This got set to 125kHz to make debugging with a logic analyzer easier and never changed back to a reasonable speed. Signed-off-by: Keith Packard

altos: Perform cc1200 calibration less often. Tweak radio params

2014-10-26T00:44:48+00:00

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