mjb/altos/src/micropeak, branch telescience-v0.2

micropeak: Record samples before boost detect

2013-01-12T17:45:31+00:00

This saves a ring of 16 samples while waiting for boost, and then goes back through those looking for the first sample higher than the ground and writes the remaining ones to the log so that we get a more complete log of the flight Signed-off-by: Keith Packard

altos: Add distinct LED pattern before writing log data

2012-12-18T08:39:37+00:00

Otherwise, the whole log looks like a an extra altitude digit. Signed-off-by: Keith Packard

altos: Make micropeak 'serial' interface work

2012-12-18T06:58:49+00:00

I prototyped the mpserial interface on a breadboard and tuned the circuit to register the LED correctly. Then adjusted the serial code to send bits at the right speed and format. The logging contents are now in hexdecimal with a CCITT CRC-16 computed to verify correct reception. Signed-off-by: Keith Packard

altos: Log baro readings for MicroPeak

2012-12-14T19:11:39+00:00

This logs barometric data every 192ms (more or less) to the 504 remaining bytes of internal EEPROM storage in the ATtiny85. This provides 48.192 seconds of logging. Signed-off-by: Keith Packard

altos: Log in-flight data for MicroPeak

2012-12-12T19:03:20+00:00

This logs the low 16 bits of the pressure value to the remaining on-chip eeprom. It can be read out with a standard AVR programming dongle. Signed-off-by: Keith Packard

altos: Add load-slow target for MicroPeak

2012-12-12T18:57:03+00:00

This sets the programming clock to 1/4 of the 250kHz clock used by the MicroPeak firmware, allowing the device to be reprogrammed. Signed-off-by: Keith Packard

altos: Tim Van Milligan suggestion for µP -- delay before showing last flight

2012-12-12T07:43:30+00:00

This gives the user time to move their finger out of the way of the LED. Signed-off-by: Keith Packard

altos: Increase MicroPeak blink times a bit

2012-12-11T22:41:53+00:00

make the 0 longer (1 sec now), and make the time between digits longer (also 1 sec now) Signed-off-by: Keith Packard

altos: Use alt_t value to hold displayed height in micropeak

2012-12-10T02:28:33+00:00

Heights are 32 bits (to get .1 meter resolution) in micropeak; make sure we have enough bits while blinking out the computed value. Signed-off-by: Keith Packard

altos: Make sure pa to altitude conversion is done with 32 bits

2012-12-10T02:27:49+00:00

We need 32 bits to hold intermediate values, even if the final altitude is reported in only 16 bits. Signed-off-by: Keith Packard