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zynq-rs/src/main.rs

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#![no_std]
#![no_main]
#![feature(asm)]
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#![feature(global_asm)]
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#![feature(naked_functions)]
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#![feature(never_type)]
#![feature(alloc_error_handler)]
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// TODO: disallow unused/dead_code when code moves into a lib crate
#![allow(dead_code)]
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extern crate alloc;
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use alloc::{vec, vec::Vec};
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use core::mem::transmute;
use compiler_builtins as _;
use smoltcp::wire::{EthernetAddress, IpAddress, IpCidr};
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use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder};
use smoltcp::time::Instant;
use smoltcp::socket::SocketSet;
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mod boot;
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mod regs;
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mod cortex_a9;
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mod abort;
mod panic;
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mod zynq;
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mod stdio;
mod ram;
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const HWADDR: [u8; 6] = [0, 0x23, 0xde, 0xea, 0xbe, 0xef];
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pub fn main() {
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println!("Main.");
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let mut ddr = zynq::ddr::DdrRam::new();
println!("DDR: {:?}", ddr.status());
ddr.memtest();
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ram::init_alloc(&mut ddr);
let eth = zynq::eth::Eth::default(HWADDR.clone());
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println!("Eth on");
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const RX_LEN: usize = 8;
let mut rx_descs = (0..RX_LEN)
.map(|_| zynq::eth::rx::DescEntry::zeroed())
.collect::<Vec<_>>();
let mut rx_buffers = vec![[0u8; zynq::eth::MTU]; RX_LEN];
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// Number of transmission buffers (minimum is two because with
// one, duplicate packet transmission occurs)
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const TX_LEN: usize = 8;
let mut tx_descs = (0..TX_LEN)
.map(|_| zynq::eth::tx::DescEntry::zeroed())
.collect::<Vec<_>>();
let mut tx_buffers = vec![[0u8; zynq::eth::MTU]; TX_LEN];
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let eth = eth.start_rx(&mut rx_descs, &mut rx_buffers);
//let mut eth = eth.start_tx(&mut tx_descs, &mut tx_buffers);
let mut eth = eth.start_tx(
// HACK
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unsafe { transmute(tx_descs.as_mut_slice()) },
unsafe { transmute(tx_buffers.as_mut_slice()) },
);
let ethernet_addr = EthernetAddress(HWADDR);
// IP stack
let local_addr = IpAddress::v4(192, 168, 1, 51);
let mut ip_addrs = [IpCidr::new(local_addr, 24)];
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let mut neighbor_storage = vec![None; 256];
let neighbor_cache = NeighborCache::new(&mut neighbor_storage[..]);
let mut iface = EthernetInterfaceBuilder::new(&mut eth)
.ethernet_addr(ethernet_addr)
.ip_addrs(&mut ip_addrs[..])
.neighbor_cache(neighbor_cache)
.finalize();
let mut sockets_storage = [
None, None, None, None,
None, None, None, None
];
let mut sockets = SocketSet::new(&mut sockets_storage[..]);
let mut time = 0u32;
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loop {
time += 1;
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let timestamp = Instant::from_millis(time);
match iface.poll(&mut sockets, timestamp) {
Ok(_) => {},
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Err(e) => {
println!("poll error: {}", e);
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}
}
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// match eth.recv_next() {
// Ok(Some(pkt)) => {
// print!("eth: rx {} bytes", pkt.len());
// for b in pkt.iter() {
// print!(" {:02X}", b);
// }
// println!("");
// }
// Ok(None) => {}
// Err(e) => {
// println!("eth rx error: {:?}", e);
// }
// }
// match eth.send(512) {
// Some(mut pkt) => {
// let mut x = 0;
// for b in pkt.iter_mut() {
// *b = x;
// x += 1;
// }
// println!("eth tx {} bytes", pkt.len());
// }
// None => println!("eth tx shortage"),
// }
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}
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}
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