lcm1602: Initial C implementation

Signed-off-by: Jon Trulson <jtrulson@ics.com>

src/lcm1602/javaupm_lcm1602.i

@@ -0,0 +1,40 @@
+%module javaupm_i2clcd
+%include "../upm.i"
+%include "stdint.i"
+%include "typemaps.i"
+%include "arrays_java.i";
+
+%apply signed char[] {uint8_t []};
+%ignore BasicFont;
+
+%typemap(jni) (uint8_t *data, int bytes) "jbyteArray";
+%typemap(jtype) (uint8_t *data, int bytes) "byte[]";
+%typemap(jstype) (uint8_t *data, int bytes) "byte[]";
+
+%typemap(javain) (uint8_t *data, int bytes) "$javainput";
+
+%typemap(in) (uint8_t *data, int bytes) {
+        $1 = (uint8_t *) JCALL2(GetByteArrayElements, jenv, $input, NULL);
+        $2 = JCALL1(GetArrayLength, jenv, $input);
+}
+
+%typemap(freearg) (uint8_t *data, int bytes) {
+        JCALL3(ReleaseByteArrayElements, jenv, $input, (jbyte *)$1, 0);
+}
+
+%{
+    #include "lcm1602.hpp"
+%}
+
+%include "lcm1602.hpp"
+
+%pragma(java) jniclasscode=%{
+    static {
+        try {
+            System.loadLibrary("javaupm_i2clcd");
+        } catch (UnsatisfiedLinkError e) {
+            System.err.println("Native code library failed to load. \n" + e);
+            System.exit(1);
+        }
+    }
+%}