diff --git a/src/eeprom.rs b/src/eeprom.rs
index 5f54d1f..70cb3cf 100644
--- a/src/eeprom.rs
+++ b/src/eeprom.rs
@@ -8,16 +8,3 @@ pub fn read_eui48<'a>(i2c: &pac::I2C2) -> Result<[u8; 6], i2c::Error> {
     i2c::write_read(i2c, I2C_ADDR, &[0xFAu8], &mut buffer)?;
     Ok(buffer)
 }
-
-pub fn read(i2c: &pac::I2C2, addr: u8, mut buffer: &mut [u8]) -> Result<(), i2c::Error> {
-    i2c::write_read(i2c, I2C_ADDR, &[addr], &mut buffer)?;
-    Ok(())
-}
-
-pub fn write(i2c: &pac::I2C2, addr: u8, buffer: &[u8]) -> Result<(), i2c::Error> {
-    for (i, &byte) in buffer.iter().enumerate() {
-        i2c::write(i2c, I2C_ADDR, &[addr+i as u8, byte])?;
-    }
-
-    Ok(())
-}
diff --git a/src/eth.rs b/src/eth.rs
index 1ddd1c8..603dc40 100644
--- a/src/eth.rs
+++ b/src/eth.rs
@@ -557,21 +557,3 @@ impl<'a> phy::TxToken for TxToken<'a> {
         result
     }
 }
-
-pub unsafe fn interrupt_handler(eth_dma: &pac::ETHERNET_DMA) {
-    eth_dma.dmacsr.write(|w|
-        w
-            .nis().set_bit()
-            .ri().set_bit()
-            .ti().set_bit()
-    );
-}
-
-pub unsafe fn enable_interrupt(eth_dma: &pac::ETHERNET_DMA) {
-    eth_dma.dmacier.modify(|_, w|
-        w
-            .nie().set_bit()
-            .rie().set_bit()
-            .tie().set_bit()
-    );
-}
diff --git a/src/i2c.rs b/src/i2c.rs
index e6c0266..bf508e2 100644
--- a/src/i2c.rs
+++ b/src/i2c.rs
@@ -109,25 +109,6 @@ fn poll_for_start_ack(
 }
 
 
-pub fn write(
-    i2c: &pac::I2C2,
-    addr: u8,
-    bytes: &[u8]
-) -> Result<(), Error> {
-    assert!(bytes.len() < 256 && bytes.len() > 0);
-
-    poll_for_start_ack(i2c, addr|0, false, bytes.len(), true, true)?;
-
-    for byte in bytes {
-        busy_wait_errors!(i2c, txis);
-        i2c.txdr.write(|w| w.txdata().bits(*byte));
-    }
-    // automatic STOP
-
-    Ok(())
-}
-
-
 pub fn write_read(
     i2c: &pac::I2C2,
     addr: u8,
@@ -160,23 +141,3 @@ pub fn write_read(
     // automatic STOP
     Ok(())
 }
-
-
-pub fn read(
-    i2c: &pac::I2C2,
-    addr: u8,
-    buffer: &mut [u8],
-) -> Result<(), Error> {
-    assert!(buffer.len() < 256 && buffer.len() > 0);
-
-    poll_for_start_ack(i2c, addr|0, true, buffer.len(), true, true)?;
-
-    for byte in buffer {
-        // Wait until we have received something
-        busy_wait_errors!(i2c, rxne);
-        *byte = i2c.rxdr.read().rxdata().bits();
-    }
-
-    // automatic STOP
-    Ok(())
-}
diff --git a/src/iir.rs b/src/iir.rs
index 344028f..85c3787 100644
--- a/src/iir.rs
+++ b/src/iir.rs
@@ -39,7 +39,6 @@ fn macc<T>(y0: T, x: &[T], a: &[T]) -> T
     x.iter().zip(a.iter()).map(|(&i, &j)| i * j).fold(y0, |y, xa| y + xa)
 }
 
-#[allow(unused)]
 impl IIR {
     pub fn set_pi(&mut self, kp: f32, ki: f32, g: f32) -> Result<(), &str> {
         let ki = copysign(ki, kp);
diff --git a/src/main.rs b/src/main.rs
index 96ad21e..1995992 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,5 @@
+#![deny(warnings)]
+
 #![no_std]
 #![no_main]
 #![cfg_attr(feature = "nightly", feature(asm))]
@@ -41,7 +43,7 @@ mod eth;
 mod iir;
 use iir::*;
 
-pub mod i2c;
+mod i2c;
 mod eeprom;
 
 #[cfg(not(feature = "semihosting"))]