mjb/altos/src/drivers/ao_cc1120.c, branch debian/1.2.1-2

altos: Set APRS deviation to 3kHz

2013-05-08T03:08:01+00:00

I finally found a bunch of references to APRS on the net and they all appear to assume a 3kHz deviation. Let's see if this works better with Yaesu radios. Signed-off-by: Keith Packard

altos: Make cc1120 driver return false on recv timeout

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

Was returning an uninitialized value, which was often not zero 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: Clear any broken cc1120 TX fifo bits before transmitting

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

This just goes and clears the transmitter before using it, just in case it got wedged somehow. It also clears the bits while waiting for the radio to go idle, otherwise it'd never make it. Signed-off-by: Keith Packard

altos: Make cc1120 driver wait for TX finished

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

Otherwise, we may come in and try to use the radio again too quickly, causing it to go into a TX fifo error state. This change watches the MARC status until the transmitter is explicitly marked as finished. 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: Get CC115L radio working.

2013-03-30T00:05:36+00:00

This involved figuring out which GPIO signal would reliably indicate that the transmitter was finished; I ended up using the PA_PD bit for this. This also converts all of the radio users to the long packet support as the CC115L has only a 64-byte fifo, not large enough to hold either an RDF tone or a regular AltOS telemetry packet. This also renames the public API for sending APRS packets from ao_radio_send_lots to ao_radio_send_aprs, which is at least more accurate. The workings of that API haven't changed, just the name. Signed-off-by: Keith Packard

altos: Change CC1120 SPI speed to 4MHz.

2013-01-14T05:38:26+00:00

Most of the chip can run at 8MHz, but extended register access is limited to 6.1MHz. Instead of pushing things, just run the SPI bus at 4MHz. Signed-off-by: Keith Packard

Merge remote-tracking branch 'origin/micropeak-logging'

2013-01-11T05:48:12+00:00

altos: Time out reading packet data from cc1120 after 100ms

2013-01-11T05:44:18+00:00

Sometimes the radio will give a spurious wakeup indicating that a preamble seems to have arrived, but no packet data will appear. In this case, abandon the packet reception and go back to waiting for a preamble again. This releases the SPI bus for other users and also avoids missing packets. Signed-off-by: Keith Packard