iPod 3G: Add a small check to ensure backlight never gets stuck off if wheel is inactive for too long (because it limits the number of backlight_on calls).

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26964 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 3 insertions, 0 deletions

diff --git a/firmware/target/arm/ipod/button-1g-3g.c b/firmware/target/arm/ipod/button-1g-3g.c
index 044e887453..9eec8fd823 100644
--- a/firmware/target/arm/ipod/button-1g-3g.c
+++ b/firmware/target/arm/ipod/button-1g-3g.c
@@ -151,6 +151,9 @@ static void handle_scroll_wheel(int new_scroll, int was_hold)
     if (v < WHEEL_SMOOTHING_VELOCITY) {
         /* very slow - no smoothing */
         wheel_velocity = v;
+        /* ensure backlight never gets stuck for an extended period if tick
+         * wrapped such that next poke is very far ahead */
+        next_backlight_on = current_tick - 1;
     }
     else {
         /* some velocity filtering to smooth things out */