Let it support USART
hardware function was setted in the hw_config.c
likes the GPIO, Timers, motion sensor, and USART..
itoa support negative number
extent usart queue size
add PJay's code
just push
change main.c to PJay's main.c
change acc chip lib
add shell
use usart feed value for pwm
change pwm scale
set baudrate to 115200
change LIS3DSH frequency
add acc's offset
remove obj dir
remove obj dir again
add motor offset
add l3g4200d's lib
Merge branch 'master' of https://github.com/openbox00/quadcopter
add l3g4200d's lib
add l3g4200d in makefile