initial support for wishield.

src/clodiuno/wishield.clj

@@ -0,0 +1,68 @@
+(ns clodiuno.wishield
+  #^{:author "Nurullah Akkaya",
+     :doc "WiShield Library for Clojure."}
+  (:use clodiuno.core :reload-all)
+  (:import (java.net Socket)
+	   (java.io PrintWriter InputStreamReader BufferedReader)))
+
+(derive ::wishield ::interface)
+
+(def INPUT 0) ;;pin to input mode
+(def OUTPUT 1) ;;pin to output mode
+(def ANALOG 2) ;;pin to analog mode
+(def PWM 3) ;; pin to PWM mode
+(def SERVO 4) ;; attach servo to pin (pins 2 - 13)
+(def HIGH 1) ;;high value (+5 volts) to a pin in a call to digital-write
+(def LOW 0) ;;low value (0 volts) to a pin in a call to digital-write
+
+(defn- send-command [conn cmd]
+  (doto (:out conn)
+    (.println cmd)
+    (.flush))
+  (.readLine (:in conn)))
+
+(defmethod enable-pin :wishield [board type pin])
+
+(defmethod disable-pin :wishield [board type pin])
+
+(defmethod pin-mode :wishield [board pin mode]
+  (let [pin (if (< pin 10) (str "0" pin) (str pin))
+	mode (cond (= mode INPUT) "i"
+		   (= mode OUTPUT) "o"
+		   (= mode ANALOG) "a"
+		   (= mode PWM) "p"
+		   (= mode SERVO) "s"
+		   :default (throw (Exception. "Invalid Mode.")))]
+    (send-command board (str "pm" pin mode))))
+
+(defmethod digital-write :wishield [board pin value]
+  (let [pin (if (< pin 10) (str "0" pin) (str pin))
+	value (cond (= value HIGH) "h"
+		   (= value LOW) "l"
+		   :default (throw (Exception. "Invalid Value.")))]
+    (send-command board (str "dw" pin value))))
+
+(defmethod close :wishield [board]
+  (let [{:keys [in out socket]} board]
+    (send-command board "bye")
+    (.close in)
+    (.close out)
+    (.close socket)))
+
+(defn arduino [ip port]
+  (let [socket (Socket. ip port)
+	in (BufferedReader. (InputStreamReader. (.getInputStream socket)))
+	out (PrintWriter. (.getOutputStream socket))]
+    (.readLine in)
+    {:interface :wishield :in in :out out :socket socket}))
+
+
+(comment 
+  (def board (arduino "10.0.2.100" 1000))
+
+  (pin-mode board 6 OUTPUT)
+  (digital-write board 6 HIGH)
+  (digital-write board 6 LOW)
+
+  (close board)
+  )