Conquering the STM32F4 on the discovery board step-by-step. Commit history is tutorialesque, but not clean of course.
 
 
 
 
 
heck 34c7175bc0 Middleware should not depend on application code 2 years ago
..
usbd_conf.c MX: Add RTOS - (CMSIS_V2 / ENABLE_FPU / USE_NEWLIB_REENTRANT enabled) 2 years ago
usbd_conf.h Middleware should not depend on application code 2 years ago