X-Git-Url: http://nitlanguage.org

diff --git a/lib/bcm2835/bcm2835.nit b/lib/bcm2835/bcm2835.nit
index a7f9d69..d77d134 100644
--- a/lib/bcm2835/bcm2835.nit
+++ b/lib/bcm2835/bcm2835.nit
@@ -14,21 +14,25 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-# Services to control the bcm2835 chipset as used in the Raspberry Pi
-# model B revision 1 Uses the C library by Mike McCauley from
-# http://www.airspayce.com/mikem/bcm2835/
+# Services to control the bcm2835 chipset used in the Raspberry Pi
+#
+# Uses the C library by Mike McCauley available at http://www.airspayce.com/mikem/bcm2835/
+#
+# This module targets the model B revision 1, it could be tweaked for other versions.
 module bcm2835
 
-import gpio
-
 in "C Header" `{
 	#include <bcm2835.h>
 `}
 
-redef class Object
-	protected fun bcm2835_init: Bool `{ return bcm2835_init(); `}
-	protected fun bcm2835_close `{ bcm2835_close(); `}
-	protected fun bcm2835_debug=(v: Bool) `{ bcm2835_set_debug(v); `}
+fun bcm2835_init: Bool `{ return bcm2835_init(); `}
+fun bcm2835_close `{ bcm2835_close(); `}
+fun bcm2835_debug=(v: Bool) `{ bcm2835_set_debug(v); `}
+
+# A physical binary pin
+interface Pin
+	# Set the output of this pin
+	fun write(high: Bool) is abstract
 end
 
 extern class RPiPin `{ RPiGPIOPin `}
@@ -436,10 +440,10 @@ class HD44780
 				#write(true, "C0".to_hex)
 				# instead we use the following which may not be portable
 
-				for s in [count..40[ do write(false, ' '.ascii)
+				for s in [count..40[ do write(false, ' '.code_point)
 				count = 0
 			else
-				write(false, c.ascii)
+				write(false, c.code_point)
 				count += 1
 			end
 		end