diff --git a/src/dds.rs b/src/dds.rs
new file mode 100644
index 0000000..476dd71
--- /dev/null
+++ b/src/dds.rs
@@ -0,0 +1,29 @@
+use embedded_hal::blocking::spi::Transfer;
+use cortex_m_semihosting::hprintln;
+use crate::Error;
+
+pub struct DDS<SPI> {
+	spi: SPI,
+}
+
+impl<SPI, E> DDS<SPI>
+where
+	SPI: Transfer<u8, Error= E>
+{
+	pub fn new(spi: SPI) -> Self {
+		DDS {
+			spi
+		}
+	}
+}
+
+impl<SPI, E> Transfer<u8> for ConfigRegister<SPI>
+where
+	SPI: Transfer<u8, Error = E>
+{
+	type Error = Error<E>;
+
+	fn transfer<'w>(&mut self, words: &'w mut [u8]) -> Result<&'w [u8], Self::Error> {
+		self.spi.transfer(words).map_err(Error::SPI)
+	}
+}