Question
All the "middlewares" on github. Divide and rule!!
ST has published on github the USBH "middleware" for all MCU families...
https://github.com/STMicroelectronics/stm32_mw_usb_host
and LwIP middleware...
https://github.com/STMicroelectronics/stm32_mw_lwip
and FreeRTOS...
https://github.com/STMicroelectronics/stm32_mw_freertos
and FATFS...
https://github.com/STMicroelectronics/stm32_mw_fatfs
and CMSIS for all families...