Type Alias atmega_hal::pac::portb::DDRB
source · pub type DDRB = Reg<DDRB_SPEC>;
Expand description
DDRB (rw) register accessor: an alias for Reg<DDRB_SPEC>
Aliased Type§
struct DDRB { /* private fields */ }
Implementations
source§impl<REG> Reg<REG>where
REG: Readable,
impl<REG> Reg<REG>where
REG: Readable,
sourcepub fn read(&self) -> <REG as Readable>::Reader
pub fn read(&self) -> <REG as Readable>::Reader
Reads the contents of a Readable
register.
You can read the raw contents of a register by using bits
:
let bits = periph.reg.read().bits();
or get the content of a particular field of a register:
let reader = periph.reg.read();
let bits = reader.field1().bits();
let flag = reader.field2().bit_is_set();
source§impl<REG> Reg<REG>where
REG: Resettable + Writable,
impl<REG> Reg<REG>where
REG: Resettable + Writable,
sourcepub fn reset(&self)
pub fn reset(&self)
Writes the reset value to Writable
register.
Resets the register to its initial state.
sourcepub fn write<F>(&self, f: F)
pub fn write<F>(&self, f: F)
Writes bits to a Writable
register.
You can write raw bits into a register:
periph.reg.write(|w| unsafe { w.bits(rawbits) });
or write only the fields you need:
periph.reg.write(|w| w
.field1().bits(newfield1bits)
.field2().set_bit()
.field3().variant(VARIANT)
);
or an alternative way of saying the same:
periph.reg.write(|w| {
w.field1().bits(newfield1bits);
w.field2().set_bit();
w.field3().variant(VARIANT)
});
In the latter case, other fields will be set to their reset value.
source§impl<REG> Reg<REG>
impl<REG> Reg<REG>
sourcepub fn modify<F>(&self, f: F)
pub fn modify<F>(&self, f: F)
Modifies the contents of the register by reading and then writing it.
E.g. to do a read-modify-write sequence to change parts of a register:
periph.reg.modify(|r, w| unsafe { w.bits(
r.bits() | 3
) });
or
periph.reg.modify(|_, w| w
.field1().bits(newfield1bits)
.field2().set_bit()
.field3().variant(VARIANT)
);
or an alternative way of saying the same:
periph.reg.modify(|_, w| {
w.field1().bits(newfield1bits);
w.field2().set_bit();
w.field3().variant(VARIANT)
});
Other fields will have the value they had before the call to modify
.