Struct atsame51j::generic::Reg [−][src]
pub struct Reg<U, REG> { /* fields omitted */ }
Expand description
This structure provides volatile access to registers.
Implementations
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();
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)
);
In the latter case, other fields will be set to their reset value.
Writes 0 to a Writable
register.
Similar to write
, but unused bits will contain 0.
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)
);
Other fields will have the value they had before the call to modify
.