1 files changed, 19 insertions, 0 deletions
diff --git a/iface/iface.go b/iface/iface.go
new file mode 100644
index 0000000..5c73252
--- /dev/null
+++ b/iface/iface.go
@@ -0,0 +1,19 @@
+package iface
+
+// TODO: Use an io.writer instead?
+type Logger interface {
+	Printf(format string, v ...interface{})
+}
+
+// Protocol provides an abstract interface to command servos. This exists so
+// that our abstract Servo type can communicate with actual servos regardless
+// which protocol version they speak.
+//
+// The interface must be the union of all protocol versions, but (so far) they
+// all have roughly the same instructions, so this isn't a big deal.
+type Protocol interface {
+	ReadData(ident int, instruction byte) ([]byte, error)
+	// WriteData writes a slice of bytes to the control table of the given servo
+	// ID.
+	WriteData(ident int, instruction byte, data []byte) error
+}