#[packbits::pack]
struct Lsb {
#[bits(1)]
b0: u8,
#[bits(1)]
b1: u8,
}
#[packbits::pack(msb)]
struct Msb {
#[bits(1)]
b0: u8,
#[bits(1)]
b1: u8,
}
fn main() {
let lsb = Lsb { b0: 1, b1: 0 };
let msb = Msb { b0: 1, b1: 0 };
let a: [u8; 1] = lsb.into();
let b: [u8; 1] = msb.into();
println!("lsb={:#04x} msb={:#04x}", a[0], b[0]);
}