mjb/altos/src/drivers, branch 1.6

altos: ao_packet_getchar needs to return 'int' so AO_READ_AGAIN works

2015-02-07T21:09:18+00:00

With ao_packet_getchar returning 'char', AO_READ_AGAIN would get converted to 0xff instead of -1 on return, making ao_packet_echo either produce a bogus character on output, breaking command responses, or wedge and never exit when the link was dropped. Signed-off-by: Keith Packard

altos/drivers: Increase SPI speed of CC115L to 6MHz

2015-02-07T09:05:03+00:00

The datasheet says that the maximum for back-to-back data is 6.5MHz. Signed-off-by: Keith Packard

altos/btm: Add fancier debug. Pull serial reset port low.

2015-02-01T15:39:17+00:00

Adds an interactive debugging mode to help diagnose BTM issues. Discovered that the serial reset pin on the BTM needs to be pulled low for the device to work correctly. Leave the bt link interrupt disabled until things are initialized. Signed-off-by: Keith Packard

altos: Add support for TeleBT v3.0

2015-01-24T19:18:59+00:00

Add support to the BTM driver for non-CC1111 interrupts Add HW flow control to STM serial driver Signed-off-by: Keith Packard

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