Added module containing new register address representations, added chip mode init/reset

src/w5500.rs

@@ -3,6 +3,7 @@ use crate::uninitialized_w5500::UninitializedW5500;
 use bus::{ActiveBus, ActiveFourWire, ActiveThreeWire, FourWire, ThreeWire};
 use embedded_hal::digital::v2::OutputPin;
 use embedded_hal::spi::FullDuplex;
+use register;
 
 pub struct W5500<SpiBus: ActiveBus> {
     bus: SpiBus,
@@ -12,10 +13,19 @@ impl<SpiBus: ActiveBus> W5500<SpiBus> {
     pub fn new(bus: SpiBus) -> Self {
         W5500 { bus }
     }
-    pub fn reset(self) -> UninitializedW5500<SpiBus> {
-        // TODO reset chip
-        UninitializedW5500::new(self.bus)
+    pub fn reset(mut self) -> Result<UninitializedW5500<SpiBus>, SpiBus::Error> {
+        // TODO accept all sockets back
+        self.clear_mode()?;
+        Ok(UninitializedW5500::new(self.bus))
     }
+
+    fn clear_mode(&mut self) -> Result<(), SpiBus::Error> {
+        // reset bit
+        let mut mode = [0b10000000];
+        block!(self.bus.transfer_frame(register::COMMON, register::common::MODE, true, &mut mode))?;
+        Ok(())
+    }
+
     //TODO open_udp_socket
 }