ENC424J600/examples/tcp_stm32f407.rs

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Rust
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#![no_std]
#![no_main]
extern crate panic_itm;
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use cortex_m::{iprintln, iprint};
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use embedded_hal::{
digital::v2::OutputPin,
blocking::delay::DelayMs
};
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use stm32f4xx_hal::{
rcc::RccExt,
gpio::GpioExt,
time::U32Ext,
stm32::ITM,
delay::Delay,
spi::Spi,
time::Hertz
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};
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use enc424j600::smoltcp_phy;
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use smoltcp::wire::{
EthernetAddress, IpAddress, IpCidr, Ipv6Cidr
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};
use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder, EthernetInterface};
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use smoltcp::socket::{SocketSet, TcpSocket, TcpSocketBuffer};
use core::str;
use core::fmt::Write;
/// Timer
use core::cell::RefCell;
use cortex_m::interrupt::Mutex;
use cortex_m_rt::exception;
use stm32f4xx_hal::{
rcc::Clocks,
time::MilliSeconds,
timer::{Timer, Event as TimerEvent},
stm32::SYST
};
use smoltcp::time::Instant;
/// Rate in Hz
const TIMER_RATE: u32 = 20;
/// Interval duration in milliseconds
const TIMER_DELTA: u32 = 1000 / TIMER_RATE;
/// Elapsed time in milliseconds
static TIMER_MS: Mutex<RefCell<u32>> = Mutex::new(RefCell::new(0));
/// Setup SysTick exception
fn timer_setup(syst: SYST, clocks: Clocks) {
let mut timer = Timer::syst(syst, TIMER_RATE.hz(), clocks);
timer.listen(TimerEvent::TimeOut);
}
/// SysTick exception (Timer)
#[exception]
fn SysTick() {
cortex_m::interrupt::free(|cs| {
*TIMER_MS.borrow(cs)
.borrow_mut() += TIMER_DELTA;
});
}
/// Obtain current time in milliseconds
pub fn timer_now() -> MilliSeconds {
let ms = cortex_m::interrupt::free(|cs| {
*TIMER_MS.borrow(cs)
.borrow()
});
ms.ms()
}
///
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use stm32f4xx_hal::{
stm32::SPI1,
gpio::{
gpioa::{PA5, PA6, PA7, PA4},
Alternate, AF5, Output, PushPull
}
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};
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type SpiEth = enc424j600::Enc424j600<
Spi<SPI1, (PA5<Alternate<AF5>>, PA6<Alternate<AF5>>, PA7<Alternate<AF5>>)>,
PA4<Output<PushPull>>
>;
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pub struct NetStorage {
ip_addrs: [IpCidr; 1],
neighbor_cache: [Option<(IpAddress, smoltcp::iface::Neighbor)>; 8],
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}
static mut NET_STORE: NetStorage = NetStorage {
// Placeholder for the real IP address, which is initialized at runtime.
ip_addrs: [IpCidr::Ipv6(
Ipv6Cidr::SOLICITED_NODE_PREFIX,
)],
neighbor_cache: [None; 8],
};
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#[rtic::app(device = stm32f4xx_hal::stm32, peripherals = true, monotonic = rtic::cyccnt::CYCCNT)]
const APP: () = {
struct Resources {
eth_iface: EthernetInterface<
'static,
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smoltcp_phy::SmoltcpDevice<SpiEth>>,
itm: ITM
}
#[init()]
fn init(mut c: init::Context) -> init::LateResources {
c.core.SCB.enable_icache();
c.core.SCB.enable_dcache(&mut c.core.CPUID);
// Enable monotonic timer CYCCNT
c.core.DWT.enable_cycle_counter();
c.core.DCB.enable_trace();
let clocks = c.device.RCC.constrain()
.cfgr
.sysclk(168.mhz())
.hclk(168.mhz())
.pclk1(42.mhz())
.require_pll48clk()
.freeze();
let mut delay = Delay::new(c.core.SYST, clocks);
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// Init ITM
let mut itm = c.core.ITM;
let stim0 = &mut itm.stim[0];
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iprintln!(stim0,
"Eth TCP Server on STM32-F407 via NIC100/ENC424J600");
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// NIC100 / ENC424J600 Set-up
let spi1 = c.device.SPI1;
let gpioa = c.device.GPIOA.split();
// Mapping: see Table 9, STM32F407ZG Manual
let spi1_sck = gpioa.pa5.into_alternate_af5();
let spi1_miso = gpioa.pa6.into_alternate_af5();
let spi1_mosi = gpioa.pa7.into_alternate_af5();
let spi1_nss = gpioa.pa4.into_push_pull_output();
// Map SPISEL: see Table 1, NIC100 Manual
let mut spisel = gpioa.pa1.into_push_pull_output();
spisel.set_high().unwrap();
delay.delay_ms(1_u32);
spisel.set_low().unwrap();
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// Create SPI1 for HAL
let eth_iface = {
let mut spi_eth = {
let spi_eth_port = Spi::spi1(
spi1, (spi1_sck, spi1_miso, spi1_mosi),
enc424j600::spi::interfaces::SPI_MODE,
Hertz(enc424j600::spi::interfaces::SPI_CLOCK_FREQ),
clocks);
SpiEth::new(spi_eth_port, spi1_nss)
.cpu_freq_mhz(168)
};
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// Init controller
match spi_eth.reset(&mut delay) {
Ok(_) => {
iprintln!(stim0, "Initializing Ethernet...")
}
Err(_) => {
panic!("Ethernet initialization failed!")
}
}
// Read MAC
let mut eth_mac_addr: [u8; 6] = [0; 6];
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spi_eth.read_mac_addr(&mut eth_mac_addr);
for i in 0..6 {
let byte = eth_mac_addr[i];
match i {
0 => iprint!(stim0, "MAC Address = {:02x}-", byte),
1..=4 => iprint!(stim0, "{:02x}-", byte),
5 => iprint!(stim0, "{:02x}\n", byte),
_ => ()
};
}
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// Init Rx/Tx buffers
spi_eth.init_rxbuf();
spi_eth.init_txbuf();
iprintln!(stim0, "Ethernet controller initialized");
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// Init smoltcp interface
let eth_iface = {
let device = smoltcp_phy::SmoltcpDevice::new(spi_eth);
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let store = unsafe { &mut NET_STORE };
store.ip_addrs[0] = IpCidr::new(IpAddress::v4(192, 168, 1, 77), 24);
let neighbor_cache = NeighborCache::new(&mut store.neighbor_cache[..]);
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EthernetInterfaceBuilder::new(device)
.ethernet_addr(EthernetAddress(eth_mac_addr))
.neighbor_cache(neighbor_cache)
.ip_addrs(&mut store.ip_addrs[..])
.finalize()
};
iprintln!(stim0, "Ethernet interface initialized");
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eth_iface
};
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// Setup SysTick after releasing SYST from Delay
// Reference to stm32-eth:examples/ip.rs
timer_setup(delay.free(), clocks);
iprintln!(stim0, "Timer initialized");
init::LateResources {
eth_iface,
itm
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}
}
#[idle(resources=[eth_iface, itm])]
fn idle(c: idle::Context) -> ! {
let stim0 = &mut c.resources.itm.stim[0];
let iface = c.resources.eth_iface;
// Copied / modified from smoltcp:
// examples/loopback.rs
let echo_socket = {
static mut TCP_SERVER_RX_DATA: [u8; 1024] = [0; 1024];
static mut TCP_SERVER_TX_DATA: [u8; 1024] = [0; 1024];
let tcp_rx_buffer = TcpSocketBuffer::new(unsafe { &mut TCP_SERVER_RX_DATA[..] });
let tcp_tx_buffer = TcpSocketBuffer::new(unsafe { &mut TCP_SERVER_TX_DATA[..] });
TcpSocket::new(tcp_rx_buffer, tcp_tx_buffer)
};
let greet_socket = {
static mut TCP_SERVER_RX_DATA: [u8; 256] = [0; 256];
static mut TCP_SERVER_TX_DATA: [u8; 256] = [0; 256];
let tcp_rx_buffer = TcpSocketBuffer::new(unsafe { &mut TCP_SERVER_RX_DATA[..] });
let tcp_tx_buffer = TcpSocketBuffer::new(unsafe { &mut TCP_SERVER_TX_DATA[..] });
TcpSocket::new(tcp_rx_buffer, tcp_tx_buffer)
};
let mut socket_set_entries = [None, None];
let mut socket_set = SocketSet::new(&mut socket_set_entries[..]);
let echo_handle = socket_set.add(echo_socket);
let greet_handle = socket_set.add(greet_socket);
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{
let store = unsafe { &mut NET_STORE };
iprintln!(stim0,
"TCP sockets will listen at {}", store.ip_addrs[0].address());
}
// Copied / modified from:
// smoltcp:examples/loopback.rs, examples/server.rs;
// stm32-eth:examples/ip.rs,
// git.m-labs.hk/M-Labs/tnetplug
loop {
// Poll
let now = timer_now().0;
let instant = Instant::from_millis(now as i64);
match iface.poll(&mut socket_set, instant) {
Ok(_) => {
},
Err(e) => {
iprintln!(stim0, "[{}] Poll error: {:?}", instant, e)
}
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}
// Control the "echoing" socket (:1234)
{
let mut socket = socket_set.get::<TcpSocket>(echo_handle);
if !socket.is_open() {
iprintln!(stim0,
"[{}] Listening to port 1234 for echoing, time-out in 10s", instant);
socket.listen(1234).unwrap();
socket.set_timeout(Some(smoltcp::time::Duration::from_millis(10000)));
}
if socket.can_recv() {
iprintln!(stim0,
"[{}] Received packet: {:?}", instant, socket.recv(|buffer| {
(buffer.len(), str::from_utf8(buffer).unwrap())
}));
}
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}
// Control the "greeting" socket (:4321)
{
let mut socket = socket_set.get::<TcpSocket>(greet_handle);
if !socket.is_open() {
iprintln!(stim0,
"[{}] Listening to port 4321 for greeting, \
please connect to the port", instant);
socket.listen(4321).unwrap();
}
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if socket.can_send() {
let greeting = "Welcome to the server demo for STM32-F407!";
write!(socket, "{}\n", greeting).unwrap();
iprintln!(stim0,
"[{}] Greeting sent, socket closed", instant);
socket.close();
}
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}
}
}
extern "C" {
fn EXTI0();
}
};