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Fuze/e200v2: Fix inaccuracy when moving the wheel slowly (fixes FS#10667).

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@23059 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-10-09 23:27:38 +00:00
parent a931acd3ab
commit faddb57482
1 changed files with 5 additions and 7 deletions
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12
firmware/target/arm/as3525/button-e200v2-fuze.c
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@ -93,7 +93,7 @@ static void scrollwheel(unsigned short dbop_din)
* clicks of the wheel */
static int counter = 0;
/* Read wheel
* Bits 13 and 14 of DBOP_DIN change as follows:
* Bits 13 and 14 of DBOP_DIN change as follows (Gray Code):
* Clockwise rotation 00 -> 01 -> 11 -> 10 -> 00
* Counter-clockwise 00 -> 10 -> 11 -> 01 -> 00
*
@ -118,18 +118,16 @@ static void scrollwheel(unsigned short dbop_din)
btn = BUTTON_SCROLL_FWD;
else if (old_wheel_value == wheel_tbl[1][wheel_value])
btn = BUTTON_SCROLL_BACK;
else if (old_btn != BUTTON_NONE)
{ /* if no button is read, assume old_btn, but only once to not have
* wrong readings */
else if (old_wheel_value != wheel_value && accel > ACCEL_INCREMENT)
{ /* if no button is read and wheel_value changed, assume old_btn */
btn = old_btn;
old_btn = BUTTON_NONE;
}
/* else btn = BUTTON_NONE */
if (btn != BUTTON_NONE)
{
if (btn != old_btn && old_btn != BUTTON_NONE)
{ /* don't do this if we assumned old_btn */
if (btn != old_btn)
{
/* direction reversals nullify acceleration and counters */
old_btn = btn;
accel = counter = 0;