Added Network trait that keeps track of network settings and has DHCP/Manual options for setting up options

src/network/mod.rs

@@ -0,0 +1,49 @@
+mod dhcp;
+mod manual;
+
+use crate::{MacAddress,IpAddress};
+use crate::bus::ActiveBus;
+use crate::register;
+pub use self::dhcp::Dhcp;
+pub use self::manual::Manual;
+
+#[derive(Default)]
+pub struct NetworkSettings {
+    mac: MacAddress,
+    ip: IpAddress,
+    gateway: IpAddress,
+    subnet: IpAddress,
+}
+
+pub trait Network {
+    /// Gets (if necessary) and sets the network settings on the chip
+    fn refresh<SpiBus: ActiveBus>(&mut self, bus: &mut SpiBus) -> Result<(), SpiBus:: Error>;
+
+    /// Write changed settings to chip
+    ///
+    /// Will check all settings and write any new ones to the chip.  Will update the settings returned by `current`
+    /// with any changes.
+    fn write_settings<SpiBus: ActiveBus>(bus: &mut SpiBus, current: &mut NetworkSettings, settings: &NetworkSettings) -> Result<(), SpiBus::Error> {
+        if settings.gateway != current.gateway {
+            let mut address = settings.gateway.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::GATEWAY, true, &mut address))?;
+            current.gateway = settings.gateway;
+        }
+        if settings.subnet != current.subnet {
+            let mut address = settings.subnet.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::SUBNET_MASK, true, &mut address))?;
+            current.subnet = settings.subnet;
+        }
+        if settings.mac != current.mac {
+            let mut address = settings.mac.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::MAC, true, &mut address))?;
+            current.mac = settings.mac;
+        }
+        if settings.ip != current.ip {
+            let mut address = settings.ip.address;
+            block!(bus.transfer_frame(register::COMMON, register::common::IP, true, &mut address))?;
+            current.ip = settings.ip;
+        }
+        Ok(())
+    }
+}