Doh! Button signals are active low

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@624 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 7 insertions, 6 deletions

diff --git a/firmware/drivers/button.c b/firmware/drivers/button.c
index 9e00efc0ec..3e35e0eea4 100644
--- a/firmware/drivers/button.c
+++ b/firmware/drivers/button.c
@@ -170,17 +170,18 @@ int button_get(void)
     int portc = PCDR;
     int btn = 0;
     
-    if ( portc & 1 )
+    /* buttons are active low */
+    if ( !(portc & 1) )
         btn |= BUTTON_LEFT;
-    if ( portc & 2 )
+    if ( !(portc & 2) )
         btn |= BUTTON_MENU;
-    if ( portc & 4 )
+    if ( !(portc & 4) )
         btn |= BUTTON_RIGHT;
-    if ( portc & 8 )
+    if ( !(portc & 8) )
         btn |= BUTTON_PLAY | BUTTON_UP;
-    if ( porta & 0x20 )
+    if ( !(porta & 0x20) )
         btn |= BUTTON_ON;
-    if ( porta & 0x800 )
+    if ( !(porta & 0x800) )
         btn |= BUTTON_STOP | BUTTON_DOWN;
 
     return btn;