Add a feature flag to disable the chip version assertion

Author: kellerkindt

Cargo.toml

@@ -16,3 +16,7 @@ embedded-hal = "0.2.4"
 embedded-nal = "0.2.0"
 bit_field = "0.10.1"
 nb = "1.0.0"
+
+[features]
+default = []
+no-chip-version-assertion = []

src/uninitialized_device.rs

@@ -115,6 +115,7 @@ impl<SpiBus: ActiveBus> UninitializedDevice<SpiBus> {
         mut host: HostImpl,
         mode_options: Mode,
     ) -> Result<Device<SpiBus, HostImpl>, InitializeError<SpiBus::Error>> {
+        #[cfg(not(feature = "no-chip-version-assertion"))]
         self.assert_chip_version(0x4)?;
 
         // RESET