Load & Config IP Settings from Flash at StartUp

src/device/boot.rs

@@ -4,7 +4,7 @@ use crate::laser_diode::ld_ctrl::{*};
 use crate::laser_diode::laser_diode::LdDrive;
 use crate::thermostat::max1968::MAX1968;
 use crate::thermostat::thermostat::Thermostat;
-use crate::net::net::ServerHandle;
+use crate::net::net::{IpSettings, ServerHandle};
 use stm32_eth;
 use fugit::ExtU32;
 use log::{info, debug};
@@ -15,7 +15,7 @@ use stm32f4xx_hal::{
     time::MegaHertz,
     watchdog::IndependentWatchdog,
 };
-
+use crate::DeviceSettings;
 use uom::si::electric_current::milliampere;
 use uom::si::{electric_current::ampere, f32::ElectricCurrent};
 
@@ -83,6 +83,22 @@ pub fn bootup(
     debug!("Setting up Internal Flash Driver");
     let flash_store = flash_store::store(perif.FLASH);
 
+    let mut ip_settings: IpSettings = IpSettings::default();
+    let device_settings : DeviceSettings;
+    match flash_store.read_value("Device") {
+        Ok(Some(config)) => {
+            device_settings = config;
+            ip_settings = device_settings.ip_settings;
+            debug!("Found Device Settings");
+        }
+        Ok(None) => {
+            debug!("Flash does not have IP Settings");
+        }
+        Err(e) => {
+            debug!("Cannot Store Flash: {:?}", e);
+        }
+    }
+
     debug!("Setting up ETH");
     let mac_addr = hw_rev.get_mac_address();
     let ethernet_parts_in = stm32_eth::PartsIn {
@@ -91,7 +107,7 @@ pub fn bootup(
         mmc: perif.ETHERNET_MMC,
         ptp: perif.ETHERNET_PTP,
     };
-    ServerHandle::new(eth_pins, eth_mgmt_pins, ethernet_parts_in, clocks, mac_addr);
+    ServerHandle::new(eth_pins, eth_mgmt_pins, ethernet_parts_in, clocks, mac_addr, ip_settings);
 
     debug!("Setting Watchdog");
     let mut wd = IndependentWatchdog::new(perif.IWDG);

src/main.rs

@@ -10,6 +10,7 @@ mod thermostat;
 mod net;
 
 use device::{boot::bootup, log_setup, sys_timer};
+use crate::net::net::IpSettings;
 use serde::{Deserialize, Serialize};
 use stm32f4xx_hal::pac::SCB;
 
@@ -31,6 +32,7 @@ static mut ETH_DATA_BUFFER: [u8; 1024] = [0; 1024];
 #[derive(Deserialize, Serialize, Clone, Copy, Debug)]
 pub struct DeviceSettings{
     report_readings: bool,
+    ip_settings: IpSettings,
 }
 
 const CONFIG_KEY: [&str; 3] = ["Device", "Laser_0", "Thermostat_0"];
@@ -57,6 +59,7 @@ fn main() -> ! {
 
     let mut device_settings = DeviceSettings {
         report_readings: false,
+        ip_settings: IpSettings::default()
     };
 
     let mut state = State::default();

src/net/net.rs

@@ -21,21 +21,24 @@ use stm32f4xx_hal::{
     rcc::Clocks,
     interrupt,
 };
+use serde::{Deserialize, Serialize};
 
-const IPV4_ADDR: (u8, u8, u8, u8) = (192, 168, 1, 132);
-const IP_INIT: IpCidr = IpCidr::Ipv4(Ipv4Cidr::new(
-    Ipv4Address::new(IPV4_ADDR.0, IPV4_ADDR.1, IPV4_ADDR.2, IPV4_ADDR.3),
-    24,
-));
-const ADDRESS: (IpAddress, u16) = (
-    IpAddress::Ipv4(Ipv4Address::new(
-        IPV4_ADDR.0,
-        IPV4_ADDR.1,
-        IPV4_ADDR.2,
-        IPV4_ADDR.3,
-    )),
-    1337,
-);
+#[derive(Debug, Clone, Copy, Deserialize, Serialize)]
+pub struct IpSettings {
+    addr: [u8; 4],
+    port: u16,
+    prefix_len: u8,
+}
+
+impl Default for IpSettings {
+    fn default() -> Self {
+        IpSettings {
+            addr: [192, 168, 1, 132],
+            port: 1337,
+            prefix_len: 24,
+        }
+    }
+}
 
 /// Interrupt pending flag: set by the `ETH` interrupt handler, should
 /// be cleared before polling the interface.
@@ -44,6 +47,7 @@ static NET_PENDING: Mutex<RefCell<bool>> = Mutex::new(RefCell::new(false));
 pub struct ServerHandle {
     socket_handle: SocketHandle,
     socket_set: SocketSet<'static>,
+    socket_addr: (IpAddress, u16),
     iface: EthInterface,
     dma: EthernetDMA<'static, 'static>,
 }
@@ -87,7 +91,8 @@ impl ServerHandle {
         eth_mgmt_pins: EthernetMgmtPins,
         ethernet_parts_in: PartsIn,
         clocks: Clocks,
-        mac_addr: [u8; 6]
+        mac_addr: [u8; 6],
+        ip_settings: IpSettings,
     ) {        
         let rx_ring = unsafe { RX_RING.get_or_insert(Default::default()) };
         let tx_ring = unsafe { TX_RING.get_or_insert(Default::default()) };
@@ -109,6 +114,20 @@ impl ServerHandle {
             eth_mgmt_pins.mdc
         ).unwrap();
 
+        let ip_init = IpCidr::Ipv4(Ipv4Cidr::new(
+            Ipv4Address::new(ip_settings.addr[0], ip_settings.addr[1], ip_settings.addr[2], ip_settings.addr[3]),
+            ip_settings.prefix_len,
+        ));
+        let socket_addr: (IpAddress, u16) = (
+            IpAddress::Ipv4(Ipv4Address::new(
+                ip_settings.addr[0],
+                ip_settings.addr[1],
+                ip_settings.addr[2],
+                ip_settings.addr[3],
+            )),
+            ip_settings.port,
+        );
+
         let mut routes = smoltcp::iface::Routes::new();
         routes
             .add_default_ipv4_route(Ipv4Address::new(192, 168, 1, 1))
@@ -123,20 +142,21 @@ impl ServerHandle {
         let mut iface = Interface::new(config, &mut &mut dma, smoltcp::time::Instant::ZERO);
         iface.set_hardware_addr(EthernetAddress(mac_addr).into());
         debug!("MAC ADDRESS: {:02X?}", EthernetAddress(mac_addr));
-        debug!("IP: {:?}", IP_INIT);
+        debug!("IP Settings: {:?}", ip_settings);
         iface.update_ip_addrs(|addr| {
-            addr.push(IP_INIT).unwrap();
+            addr.push(ip_init).unwrap();
         });
 
         let mut sockets = SocketSet::new(&mut socket_storage[..]);
         let tcp_handle = sockets.add(socket);
         let socket = sockets.get_mut::<Socket>(tcp_handle);
-        socket.listen(ADDRESS).ok();
+        socket.listen(socket_addr).ok();
         iface.poll(Instant::from_millis(i64::from(sys_timer::now())), &mut &mut dma, &mut sockets);
         
         let server = ServerHandle {
             socket_handle: tcp_handle,
             socket_set: sockets,
+            socket_addr: socket_addr,
             iface: iface,
             dma: dma,
         };
@@ -193,7 +213,7 @@ impl ServerHandle {
         let socket = self.socket_set.get_mut::<Socket>(self.socket_handle);
         if !socket.is_listening() && !socket.is_open() || socket.state() == State::CloseWait {
             socket.abort();
-            socket.listen(ADDRESS).ok();
+            socket.listen(self.socket_addr).ok();
             info!("Disconnected... Reopening listening socket.");
             return false;
         } else if socket.state() == State::Closed || socket.state() == State::Closing {