Rewite the code by using C99 initialization and remove some useless code
Rearrange the code
Watch: replace "0" to "NULL"
Remove typedef pwm_t and attitude_t
watch: fix the Ctrl + C interrupt no action issue
Merge branch 'master' of https://github.com/shengwen1997/QuadrotorFlightControl into watch_cmd_experiment
Merge branch 'master' of https://github.com/shengwen1997/QuadrotorFlightControl into watch_cmd_experiment
Fix duplicate name
Change naming style(type more faster)