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fuzev2: leave at least 3ms between scrollwheel events

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fix insane acceleration

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26060 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Rafaël Carré 2010-05-15 16:34:14 +00:00
parent 79cfc221a5
commit d10bf7ab46
1 changed files with 13 additions and 10 deletions
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23
firmware/target/arm/as3525/sansa-fuzev2/button-fuzev2.c
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@ -34,6 +34,7 @@ static bool hold_button = false;
#define TIMER_TICK (KERNEL_TIMER_FREQ/HZ)/* how long a tick lasts */
#define TIMER_MS (TIMER_TICK/(1000/HZ))/* how long a ms lasts */
#define WHEEL_LOOP_INTERVAL ( 3*TIMER_MS) /* 3 ms */
#define WHEEL_REPEAT_INTERVAL (300*TIMER_MS) /* 300ms */
#define WHEEL_FAST_ON_INTERVAL ( 20*TIMER_MS) /* 20ms */
#define WHEEL_FAST_OFF_INTERVAL ( 60*TIMER_MS) /* 60ms */
@ -76,6 +77,18 @@ static void scrollwheel(unsigned int wheel_value)
{ 1, 3, 0, 2 }, /* Counter-clockwise */
};
int repeat = 1; /* assume repeat */
long time = TIMER2_VALUE + current_tick*TIMER_TICK; /* to timer unit */
long v = (time - last_wheel_post);
if (v < WHEEL_LOOP_INTERVAL) /* avoid too frequent updates */
return ;
/* interpolate velocity in timer_freq/timer_unit == 1/s */
if (v) v = TIMER_FREQ / v;
/* accumulate velocities over time with each v */
wheel_velocity = (7*wheel_velocity + v) / 8;
unsigned int btn = BUTTON_NONE;
if (old_wheel_value == wheel_tbl[0][wheel_value])
@ -89,16 +102,6 @@ static void scrollwheel(unsigned int wheel_value)
return;
}
int repeat = 1; /* assume repeat */
long time = TIMER2_VALUE + current_tick*TIMER_TICK; /* to timer unit */
long v = (time - last_wheel_post);
/* interpolate velocity in timer_freq/timer_unit == 1/s */
if (v) v = TIMER_FREQ / v;
/* accumulate velocities over time with each v */
wheel_velocity = (7*wheel_velocity + v) / 8;
if (btn != wheel_repeat)
{
/* direction reversals nullify all fast mode states */