STM32F103 USB HID -

i'm trying connect board pc no success.

here tried; tried "stm32 fs device lib". includes illustration project named custom hid. uses leds, extis , pin named usb_disconnect. ported code, removed usb_disconnect part , leds. when called usb_init(), nil happens. no device found pc.

there no need configure custom endpoints, descriptor or else. communication personal use. want phone call functions i.e. usb_read() , usb_write().