init
add FreeRTOS lib
add STM32 lib
add CM3 lib
add demo
example let moust draw square
remove do not need function
remove do not need function
rename discovery_demo to usb_hid
new discoveryF4/usb_msc
remove discovery_demo target
change method to init direction; draw dotted line
move function put in systick
press user_button to start draw
add release function; let x,y offset = 1
Increase the gap
Merge remote-tracking branch 'craze429/master'