ENC424J600/examples/tcp_stm32f407.rs

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Rust
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#![no_std]
#![no_main]
use core::env;
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extern crate panic_itm;
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use cortex_m::{iprintln, iprint};
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use cortex_m_rt::entry;
use embedded_hal::digital::v2::OutputPin;
use embedded_hal::blocking::delay::DelayMs;
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use stm32f4xx_hal::{
rcc::RccExt,
gpio::GpioExt,
time::U32Ext,
stm32::{CorePeripherals, Peripherals},
delay::Delay,
spi::Spi,
time::Hertz
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};
use enc424j600;
use enc424j600::EthController;
use enc424j600::smoltcp_phy;
use smoltcp::wire::{
EthernetAddress, IpAddress, IpCidr
};
use smoltcp::iface::{NeighborCache, EthernetInterfaceBuilder};
use smoltcp::socket::{SocketSet, TcpSocket, TcpSocketBuffer};
use smoltcp::time::{Instant, Duration};
use core::str;
use core::fmt::Write;
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
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};
/// 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()
}
#[entry]
fn main() -> ! {
let mut cp = CorePeripherals::take().unwrap();
cp.SCB.enable_icache();
cp.SCB.enable_dcache(&mut cp.CPUID);
let dp = Peripherals::take().unwrap();
let clocks = dp.RCC.constrain()
.cfgr
.sysclk(168.mhz())
.hclk(168.mhz())
.pclk1(32.mhz())
.pclk2(64.mhz())
.freeze();
// Init ITM & use Stimulus Port 0
let mut itm = cp.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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// Get IP address from args
let arg_ip_raw = env!("ENC424J600_TCP_IP");
let mut arg_ip_str = arg_ip_raw.split('.');
let mut arg_ip: [u8; 4] = [0; 4];
for i in 0..4 {
match arg_ip_str.next() {
Some(x) => {
match x.parse() {
Ok(x_) => { arg_ip[i] = x_ },
Err(_) => { panic!("IPv4 address invalid!") }
}
},
None => { panic!("IPv4 address invalid!") }
}
}
// Get IP prefix length from args
let arg_ip_pref_raw = env!("ENC424J600_TCP_PREF");
let mut arg_ip_pref: u8 = 0;
match arg_ip_pref_raw.parse() {
Ok(x) => { arg_ip_pref = x },
Err(_) => { panic!("IP prefix length invalid!") }
}
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// NIC100 / ENC424J600 Set-up
let spi1 = dp.SPI1;
let gpioa = dp.GPIOA.split();
let mut delay = Delay::new(cp.SYST, clocks);
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// 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);
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spisel.set_low().unwrap();
// Create SPI1 for HAL
let spi_eth_port = Spi::spi1(
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spi1, (spi1_sck, spi1_miso, spi1_mosi),
enc424j600::spi::interfaces::SPI_MODE,
Hertz(enc424j600::spi::interfaces::SPI_CLOCK_FREQ),
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clocks);
let mut spi_eth = enc424j600::SpiEth::new(spi_eth_port, spi1_nss);
// Init
match spi_eth.init_dev(&mut delay) {
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Ok(_) => {
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iprintln!(stim0, "Ethernet initialized")
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}
Err(_) => {
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panic!("Ethernet initialization failed!")
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}
}
// Setup SysTick
// Reference to stm32-eth:examples/ip.rs
timer_setup(delay.free(), clocks);
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iprintln!(stim0, "Timer initialized");
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// Read MAC
let mut eth_mac_addr: [u8; 6] = [0; 6];
spi_eth.read_from_mac(&mut eth_mac_addr);
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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();
// Copied / modified from smoltcp:
// examples/loopback.rs, examples/multicast.rs
let device = smoltcp_phy::SmoltcpDevice::new(&mut spi_eth);
let mut neighbor_cache_entries = [None; 16];
let neighbor_cache = NeighborCache::new(&mut neighbor_cache_entries[..]);
let ip_addr = IpCidr::new(IpAddress::v4(
arg_ip[0], arg_ip[1], arg_ip[2], arg_ip[3]), arg_ip_pref);
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let mut ip_addrs = [ip_addr];
let mut iface = EthernetInterfaceBuilder::new(device)
.ethernet_addr(EthernetAddress(eth_mac_addr))
.neighbor_cache(neighbor_cache)
.ip_addrs(&mut ip_addrs[..])
.finalize();
// 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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iprintln!(stim0, "TCP sockets will listen at {}", ip_addr);
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// Copied / modified from:
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// smoltcp:examples/loopback.rs, examples/server.rs;
// stm32-eth:examples/ip.rs,
// git.m-labs.hk/M-Labs/tnetplug
loop {
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)
}
}
// Control the "echoing" socket (:1234)
{
let mut socket = socket_set.get::<TcpSocket>(echo_handle);
if !socket.is_open() {
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iprintln!(stim0,
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"[{}] Listening to port 1234 for echoing, time-out in 10s", instant);
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socket.listen(1234).unwrap();
socket.set_timeout(Some(Duration::from_millis(10000)));
}
if socket.can_recv() {
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iprintln!(stim0,
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"[{}] Received packet: {:?}", instant, socket.recv(|buffer| {
(buffer.len(), str::from_utf8(buffer).unwrap())
}));
}
}
// Control the "greeting" socket (:4321)
{
let mut socket = socket_set.get::<TcpSocket>(greet_handle);
if !socket.is_open() {
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iprintln!(stim0,
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"[{}] Listening to port 4321 for greeting, \
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please connect to the port", instant);
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socket.listen(4321).unwrap();
}
if socket.can_send() {
let greeting = "Welcome to the server demo for STM32-F407!";
write!(socket, "{}\n", greeting).unwrap();
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iprintln!(stim0,
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"[{}] Greeting sent, socket closed", instant);
socket.close();
}
}
}
}