mjb/altos/src/cc1111/ao_radio.c, branch telemega-v2

altos: Replace ao_alarm/ao_clear_alarm with ao_sleep_for

2015-02-14T07:51:10+00:00

Having arbitrary alarms firing in the middle of complicated device logic makes no sense at all. Therefore only correct use of ao_alarm and ao_clear_alarm was around a specific ao_sleep call, with correct recovery in case the alarm fires. This patch replaces all uses of ao_alarm/ao_sleep/ao_clear_alarm with ao_sleep_for, a new function which takes the alarm timeout directly. A few cases which weren't simply calling ao_sleep have been reworked to pass the timeout value down to the place where sleep *is* being called, and having that code deal with the return correctly. Signed-off-by: Keith Packard

altos: Reduce deviation at 2400/9600 baud

2014-09-07T03:39:37+00:00

There's no reason to use 20.5kHz deviation at 2400 and 9600 baud, and if we get a better receiver, we'll want to use narrower deviation to have less bandwidth sucking noise into the radio. The new values are (nominally) 5.125kHz deviation for 9600 baud and 1.5kHz deviation for 2400 baud. Signed-off-by: Keith Packard

altos/cc1111: Add 2400 and 9600 baud telemetry rate support

2014-07-05T07:38:10+00:00

Signed-off-by: Keith Packard

altos/cc1111: Adjust receive parameters to improve sensitivity

2014-07-05T07:38:10+00:00

This removes the packet quality test and carrier sense tests when deciding whether to start decoding a packet. This lets more bad packets through, but the CRC check catches those and now we're regularly receiving packets down to -110 or even -112 dBm. Before this change, we'd rarely see packets as low as -105dBm Signed-off-by: Keith Packard

altos/cc1111: Fetch RSSI for TeleFire from correct byte

2013-06-20T05:42:58+00:00

Reading the status byte doesn't provide very useful RSSI info Signed-off-by: Keith Packard

altos: Open up the DVGA gain to use all of the available settings

2013-05-08T03:08:00+00:00

We usually work in RF quiet areas; let the AGC hardware try all of the available gain settings. Signed-off-by: Keith Packard

altos: Compute "real" RSSI value in radio code as needed

2013-05-08T03:07:54+00:00

Instead of dragging around the weird CC1111 RSSI values, just compute a dBm value in a signed 8-bit integer, ao_radio_rssi. Use that everywhere we need RSSI internally. We leave the weird CC1111 value in the packet reply as that's what the host expects. Signed-off-by: Keith Packard

altos: Provide timeout value to ao_radio_recv

2013-05-08T03:07:52+00:00

Instead of using ao_alarm around calls to ao_radio_recv, provide an explicit timeout value as needed by radio functions with more complicated system interaction than the cc1111. The timeout is 8 bits of clock ticks. Signed-off-by: Keith Packard

altos: Clean up radio APIs

2012-08-27T20:47:16+00:00

Move api to ao_radio_cmac.h include file. Expose ao_radio_test as standard API. Signed-off-by: Keith Packard

altos: Disable telefire 'pad' listener when testing radio

2012-08-24T07:27:13+00:00

Ensures that the radio testing won't block waiting for a firing mode packet to arrive. Signed-off-by: Keith Packard