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Fix occasional power button ghost presses and get rid of the delay which was needed to reduce the ghost presses (i.e. don't read power button too during lcd updates)

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20058 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thomas Martitz 2009-02-19 22:54:48 +00:00
parent 4d32457410
commit 7d0b9f7fb7
1 changed files with 13 additions and 10 deletions
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23
firmware/target/arm/as3525/sansa-fuze/button-fuze.c
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@ -128,13 +128,14 @@ bool button_hold(void)
static short button_dbop(void) static short button_dbop(void)
{ {
/* skip home reading if lcd_button_support was blocked, /* skip home and power reading if lcd_button_support was blocked,
* since the dbop bit 15 is invalid then, and use the old value instead */ * since the dbop bit 15 is invalid then, and use the old value instead */
/* -20 (arbitary value) indicates valid home button read */ /* -20 (arbitary value) indicates valid home&power button read */
int old_home = -20; int old_home_power = -20;
int delay = 0;
if(!lcd_button_support()) if(!lcd_button_support())
old_home = (_dbop_din & 1<<15); {
old_home_power = (_dbop_din & (1<<15|1<<8));
}
/* Wait for fifo to empty */ /* Wait for fifo to empty */
while ((DBOP_STAT & (1<<10)) == 0); while ((DBOP_STAT & (1<<10)) == 0);
@ -145,10 +146,8 @@ static short button_dbop(void)
DBOP_TIMPOL_01 = 0xe167e167; DBOP_TIMPOL_01 = 0xe167e167;
DBOP_TIMPOL_23 = 0xe167006e; DBOP_TIMPOL_23 = 0xe167006e;
while(delay++ < 64);
DBOP_CTRL |= (1<<15); /* start read */ DBOP_CTRL |= (1<<15); /* start read */
((DBOP_STAT & (1<<16)) == 0); /* wait for valid data */ while((DBOP_STAT & (1<<16)) == 0); /* wait for valid data */
_dbop_din = DBOP_DIN; /* now read */ _dbop_din = DBOP_DIN; /* now read */
@ -158,8 +157,12 @@ static short button_dbop(void)
DBOP_CTRL |= (1<<16); DBOP_CTRL |= (1<<16);
DBOP_CTRL &= ~(1<<19); DBOP_CTRL &= ~(1<<19);
if (old_home != -20) /* write back old values if blocked */
_dbop_din |= old_home; if (old_home_power != -20)
{
_dbop_din |= old_home_power & 1<<15;
_dbop_din &= 0xfeff|(old_home_power & 1<<8);
}
return _dbop_din; return _dbop_din;
} }