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Jan 23, 2008, 05:21 AM
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The throughhole thrasher rides again


So every year from Feb-April, a cutoff low forms over the Farallon islands and spins clouds at Rain Ramon. The clouds hit the East bay hills and turn into constant drizzle, day & night.

This year, considering moving some test flights near the day job. Silicon valley doesn't have the rain that Rain Ramon has, but it's super windy.

Speaking of cutoff lows, had more engine tests in the dumpy apartment. Obviously, the engine didn't cutoff during transmitter shutdown, the undervolt detection doesn't work, the analog values shoot up, and Taiwan blades R much more fragile than Corona blades.

Fortunately, in any normal situation, the transmitter won't be shut off unless idle-up is in cutoff mode or the throttle stick is all the way down. The ESC doesn't instantly go out of control.

Just unplugging the xbee showed that engine cutoff was working.
Now video of the engine cutoff tests + footage of how far over the tail rotor is to get any effectiveness.

engine cutoff tests + tail rotor deflection (2 min 25 sec)


In other news, Vicaglider was created exactly for Calif*'s brutal rainy season. Bootloader upgrade & build system complete. She's much faster to program than Vicacopter but takes a handfull of wires. Now for you SDCC gamers:

To compile source files:
sdcc -mpic16 -p18f458 -Dpic18f458 -I/root/sdcc/share/sdcc/include/pic16/ -c pic_main.c -o pic_main.o

To link object files into a .hex file:
sdcc -mpic16 -p18f458 -Dpic18f458 -I/root/sdcc/share/sdcc/include/pic16/ --no-crt -Wl -s,linker.lkr -o pic_main.hex pic_main.o

main must be the first function in the first object.

U need a linker script with the page region set to the desired start byte:
CODEPAGE NAME=page START=0x200 END=0x7FFF

Our bootloader starts at 0x200.
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