main: Add PrepareForDfu state

src/main.rs

@@ -52,6 +52,7 @@ pub enum State {
     SaveLdThermostatSettings,
     SaveDeviceSettings,
     PrepareForHardReset,
+    PrepareForDfu,
     HardReset,
 }
 
@@ -299,6 +300,26 @@ fn main() -> ! {
                     }
                 });
             }
+            State::PrepareForDfu => {
+                // State Transition
+                state = State::HardReset;
+
+                wd.feed();
+                laser.power_down();
+                thermostat.power_down();
+                net::net::for_each(|mut socket, _| {
+                    if net::net::eth_is_socket_active(socket) {
+                        net::cmd_handler::send_response(
+                            eth_data_buffer,
+                            net::cmd_handler::ResponseEnum::Dfu,
+                            None,
+                            &mut socket,
+                        );
+                        net::net::eth_poll_iface();
+                    }
+                });
+            }
+
             State::HardReset => {
                 wd.feed();
                 laser.power_down();

src/net/cmd_handler.rs

@@ -31,6 +31,7 @@ pub enum ResponseEnum {
     InvalidDatatype,
     InvalidCmd,
     HardReset,
+    Dfu,
     ConnectionClose,
 }
 
@@ -324,7 +325,7 @@ pub fn execute_cmd(
                         dfu::set_dfu_trigger();
                     }
                     net::eth_poll_iface();
-                    *state = State::HardReset;
+                    *state = State::PrepareForDfu;
                 }
                 Some(DeviceCmd::SetActiveReportMode) => match cmd.json.data_bool {
                     Some(val) => {