Constant RX_BUF_SIZE 

pub const RX_BUF_SIZE: usize = _; // 1_536usize

Packet pool buffer size for a full received frame: 22 header bytes + 1514, word-rounded.

static POOL: StaticPool<{ cyw43::RX_BUF_SIZE }, 16, { cyw43::RX_BUF_ALIGN }> = StaticPool::new();