diff options
| -rw-r--r-- | firmware/drivers/button.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/firmware/drivers/button.c b/firmware/drivers/button.c index 983941c..0aea47e 100644 --- a/firmware/drivers/button.c +++ b/firmware/drivers/button.c @@ -143,10 +143,16 @@ static int ipod_4g_button_read(void) backlight_on(); if (old_wheel_value != -1) { wheel_delta = new_wheel_value - old_wheel_value; - wheel_delta_abs = wheel_delta < 0 ? -wheel_delta : wheel_delta; - - wheel_delta = new_wheel_value - old_wheel_value; - + wheel_delta_abs = wheel_delta < 0 ? -wheel_delta + : wheel_delta; + + if (wheel_delta_abs > 48) { + if (old_wheel_value > new_wheel_value) + /* wrapped around the top going clockwise */ + wheel_delta += 96; + else if (old_wheel_value < new_wheel_value) + /* wrapped around the top going counterclockwise */ wheel_delta -= 96; + } /* TODO: these thresholds should most definitely be settings, and we're probably going to want a more advanced scheme than this anyway. */ @@ -189,8 +195,6 @@ static int ipod_4g_button_read(void) return btn; } - - void ipod_4g_button_int(void) { PP5020_CPU_HI_INT_CLR = PP5020_I2C_MASK; |