pub fn find_cp210x(config_desc: &[u8], interface_idx: u8) -> Option<Cp210xInfo>Expand description
Return the nth (0-indexed) vendor-class interface in config_desc
that exposes a bulk IN + bulk OUT endpoint pair.
Use interface_idx = 0 for single-port CP210x parts; 0..2 for
CP2105; 0..4 for CP2108.