pub struct R(_);
Register CMDARG reader
CMDARG
Bits 0:31 - Value indicates command argument to be passed to the card.
Reads raw bits from register.
TypeId
self
Returns the argument unchanged.
Calls U::from(self).
U::from(self)
That is, this conversion is whatever the implementation of From<T> for U chooses to do.
From<T> for U