pub type R = R<u32, AFRL>;
Reader of register AFRL
pub struct R { /* private fields */ }
Bits 12:15 - Alternate function selection for port x bit y (y = 0..7)
Bits 4:7 - Alternate function selection for port x bit y (y = 0..7)
Bits 0:3 - Alternate function selection for port x bit y (y = 0..7)