/*
* Get button pressed from hardware
*/
int button_read_device(void)
{
#ifdef SANSA_FUZE
static unsigned power_counter = 0;
#endif
unsigned short dbop_din;
int btn = BUTTON_NONE;
dbop_din = button_read_dbop();
/* hold button handling */
hold_button = ((dbop_din & (1<<12)) != 0);
#ifndef BOOTLOADER
/* light handling */
if (hold_button != hold_button_old)
{
hold_button_old = hold_button;
backlight_hold_changed(hold_button);
}
#endif /* BOOTLOADER */
if (hold_button) {
#ifdef SANSA_FUZE
power_counter = HZ;
#endif
return 0;
}
/* push button handling */
if ((dbop_din & (1 << 2)) == 0)
btn |= BUTTON_UP;
if ((dbop_din & (1 << 3)) == 0)
btn |= BUTTON_LEFT;
if ((dbop_din & (1 << 4)) == 0)
btn |= BUTTON_SELECT;
if ((dbop_din & (1 << 5)) == 0)
btn |= BUTTON_RIGHT;
if ((dbop_din & (1 << 6)) == 0)
btn |= BUTTON_DOWN;
if ((dbop_din & (1 << 8)) != 0)
btn |= BUTTON_POWER;
if ((dbop_din & (1 << 15)) == 0)
btn |= DBOP_BIT15_BUTTON;
#ifdef SANSA_FUZE
/* 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
* (fuze only)
*/
if (power_counter > 0) {
power_counter--;
btn &= ~BUTTON_POWER;
}
#endif
return btn;
}
void INT_TIMER2(void)
{
if (!poll_scrollwheel)
call_tick_tasks(); /* Run through the list of tick tasks
* (that includes reading the scrollwheel) */
else
{
if (!button_hold())
button_read_dbop(); /* Read the scrollwheel */
}
poll_scrollwheel ^= 1;
TIMER2_INTCLR = 0; /* clear interrupt */
}