/// Mask for standard identifiers.
pub const SFF_MASK: u32 = 0x0000_07FF;
/// Mask for extended identifiers.
pub const EFF_MASK: u32 = 0x1FFF_FFFF;
/// Mask for error identifiers.
pub const ERR_MASK: u32 = 0x1FFF_FFFF;
/// The max sizeof can-frame's data.
pub const MAX_FRAME_SIZE: usize = 8;
/// The max sizeof can-fd frame's data.
pub const MAX_FD_FRAME_SIZE: usize = 64;
/// The max sizeof can-xl frame's data
pub const MAX_XL_FRAME_SIZE: usize = 2048;
/// Default padding value(0b1010_1010).
pub const DEFAULT_PADDING: u8 = 0xAA;