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Sansa Fuze Buttons: cleanup slightly, prevent button_counter from wrapping, and implement a (imo) decent wheel acceleration.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20317 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-03-13 16:18:56 +00:00
parent 2fff9fcb9d
commit 26306a8e91
1 changed files with 27 additions and 20 deletions
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47
firmware/target/arm/as3525/sansa-fuze/button-fuze.c
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@ -32,9 +32,6 @@
#include "button-target.h"
#include "backlight.h"
#define WHEEL_REPEAT_INTERVAL 30
#define WHEELCLICKS_PER_ROTATION 48 /* wheelclicks per full rotation */
/* Buttons */
static bool hold_button = false;
#ifndef BOOTLOADER
@ -52,12 +49,15 @@ void button_init_device(void)
}
#if !defined(BOOTLOADER) && defined(HAVE_SCROLLWHEEL)
static void scrollwheel(void)
static void scrollwheel(short dbop)
{
static unsigned old_wheel_value = 0;
static unsigned wheel_value = 0;
static unsigned wheel_repeat = BUTTON_NONE;
/* current wheel values, parsed from dbop and the resulting button */
unsigned wheel_value = 0;
unsigned btn = BUTTON_NONE;
/* old wheel values */
static unsigned old_wheel_value = 0;
static unsigned wheel_repeat = BUTTON_NONE;
/* getting BUTTON_REPEAT works like this: We increment repeat by 2 if the
* wheel was turned, and decrement it by 1 each tick,
* that means: if you change the wheel fast enough, repeat will be >1 and
@ -76,7 +76,7 @@ static void scrollwheel(void)
{ 2, 0, 3, 1 }, /* Clockwise rotation */
{ 1, 3, 0, 2 }, /* Counter-clockwise */
};
wheel_value = _dbop_din & (1<<13|1<<14);
wheel_value = dbop & (1<<13|1<<14);
wheel_value >>= 13;
if (old_wheel_value == wheel_tbl[0][wheel_value])
@ -89,25 +89,32 @@ static void scrollwheel(void)
if (btn != wheel_repeat)
{
/* direction reversals nullify repeats */
wheel_repeat = btn;
repeat = 0;
wheel_repeat = btn;
repeat = 0;
}
if (btn != BUTTON_NONE)
{
/* generate repeats if quick enough */
if (repeat > 0)
/* wheel_delta will cause lists to jump over items,
* we want this for fast scrolling, but we must keep it accurate
* for slow scrolling */
int wheel_delta = 0;
/* generate repeats if quick enough, scroll slightly faster too*/
if (repeat > 1)
{
btn |= BUTTON_REPEAT;
wheel_delta = repeat>>2;
}
repeat += 2;
/* the wheel is more reliable if we don't send ever change,
* every 4th is basically one "physical click" is 1 item in
* the rockbox menus */
if (queue_empty(&button_queue) && ++counter >= 4)
if (++counter >= 4 && queue_empty(&button_queue))
{
buttonlight_on();
backlight_on();
queue_post(&button_queue, btn, 1<<24);
queue_post(&button_queue, btn, ((wheel_delta+1)<<24));
/* message posted - reset count */
counter = 0;
}
@ -219,26 +226,26 @@ int button_read_device(void)
{
int btn = BUTTON_NONE;
short dbop = button_dbop();
static unsigned power_counter = HZ;
static unsigned power_counter = 0;
/* hold button */
if(dbop & (1<<12))
{
power_counter = 0;
power_counter = HZ;
hold_button = true;
}
else
{
/* might wrap, but shouldn't be much of an issue*/
power_counter++;
hold_button = false;
#if defined(HAVE_SCROLLWHEEL) && !defined(BOOTLOADER)
/* read wheel on bit 13 & 14, but sent to the button queue seperately */
scrollwheel();
scrollwheel(dbop);
#endif
/* read power on bit 8, but not if hold button was just released, since
* you basically always hit power due to the slider mechanism after releasing
* hold (wait ~1 sec) */
if (dbop & (1<<8) && power_counter>HZ)
if (power_counter)
power_counter--;
if (!power_counter && dbop & (1<<8))
btn |= BUTTON_POWER;
/* read home on bit 15 */
if (!(dbop & (1<<15)))