From 9cc2bb912542ed49020dae6a145cefa46ea67fec Mon Sep 17 00:00:00 2001
From: Bas Laarhoven <sjml@xs4all.nl>
Date: Sat, 13 Aug 2011 11:33:13 -0700
Subject: [PATCH] Also set DDR mask for upper 8 channels if using a 16-bit mux.

---
 analog.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/analog.c b/analog.c
index b536e82..bfa348a 100644
--- a/analog.c
+++ b/analog.c
@@ -59,6 +59,9 @@ void analog_init() {
 
 		// clear analog inputs in the data direction register(s)
 		AIO0_DDR &= ~analog_mask;
+		#ifdef	AIO8_DDR
+			AIO8_DDR &= ~(analog_mask >> 8);
+		#endif
 
 		// disable the analog inputs for digital use.
 		DIDR0 = analog_mask & 0xFF;