Function libopencm3_sys::usb_msc_init

pub unsafe extern "C" fn usb_msc_init(
    usbd_dev: *mut usbd_device, 
    ep_in: u8, 
    ep_in_size: u8, 
    ep_out: u8, 
    ep_out_size: u8, 
    vendor_id: *const c_char, 
    product_id: *const c_char, 
    product_revision_level: *const c_char, 
    block_count: u32, 
    read_block: Option<unsafe extern "C" fn(lba: u32, copy_to: *mut u8) -> c_int>, 
    write_block: Option<unsafe extern "C" fn(lba: u32, copy_from: *const u8) -> c_int>
) -> *mut usbd_mass_storage