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pub trait Word {
type ArchType;
const LEN: u8;
const MASK: u16;
fn value_to_transmit(&self) -> u16;
fn from_received(raw: u16) -> Self;
}
macro_rules! word_type {
($name:ident, $underlying:ident, $len:expr, $mask:expr) => {
pub struct $name($underlying);
impl $name {
pub fn new(v: $underlying) -> Self {
if v & (!$mask) != 0 {
panic!("value out of range for word type");
}
Self(v)
}
}
impl Word for $name {
type ArchType = $underlying;
const LEN: u8 = $len;
const MASK: u16 = $mask;
fn value_to_transmit(&self) -> u16 {
self.0 as u16
}
fn from_received(raw: u16) -> Self {
Self(raw as $underlying)
}
}
};
}
word_type!(U1, u8, 1, 0b0000000000000001);
word_type!(U2, u8, 2, 0b0000000000000011);
word_type!(U3, u8, 3, 0b0000000000000111);
word_type!(U4, u8, 4, 0b0000000000001111);
word_type!(U5, u8, 5, 0b0000000000011111);
word_type!(U6, u8, 6, 0b0000000000111111);
word_type!(U7, u8, 7, 0b0000000001111111);
word_type!(U8, u8, 8, 0b0000000011111111);
word_type!(U9, u16, 9, 0b0000000111111111);
word_type!(U10, u16, 10, 0b0000001111111111);
word_type!(U11, u16, 11, 0b0000011111111111);
word_type!(U12, u16, 12, 0b0000111111111111);
word_type!(U13, u16, 13, 0b0001111111111111);
word_type!(U14, u16, 14, 0b0011111111111111);
word_type!(U15, u16, 15, 0b0111111111111111);
word_type!(U16, u16, 16, 0b1111111111111111);
impl Word for u8 {
type ArchType = u8;
const LEN: u8 = 8;
const MASK: u16 = 0b0000000011111111;
fn value_to_transmit(&self) -> u16 {
*self as u16
}
fn from_received(raw: u16) -> Self {
raw as u8
}
}
impl Word for u16 {
type ArchType = u16;
const LEN: u8 = 8;
const MASK: u16 = 0b1111111111111111;
fn value_to_transmit(&self) -> u16 {
*self
}
fn from_received(raw: u16) -> Self {
raw
}
}