static void kick_measure(bool pull_x, bool pull_y, bool detect, int lradc_phys)
{
/* setup measurement: x- pull down and x+ pull up */
imx233_lradc_setup_touch(pull_x, pull_y, pull_x, pull_y, detect);
imx233_lradc_enable_touch_detect_irq(false);
imx233_lradc_enable_channel_irq(touch_chan, true);
/* measure channel, no accumulation */
imx233_lradc_setup_channel(touch_chan, false, false, 0, lradc_phys);
/* use a delay */
imx233_lradc_setup_delay(touch_delay, 1 << touch_chan, 0, 0, 8);
imx233_lradc_kick_delay(touch_delay);
}
void lradc_setup_channels_for_polling()
{
unsigned char i;
int trigger_bitmap = 0;
imx233_lradc_init();
for (i=0; i<MAX_USER_LRADC; i++) {
imx233_lradc_setup_channel(i, 1, 0, 0, i);
imx233_lradc_enable_channel_irq(i, false);
imx233_lradc_clear_channel_irq(i);
trigger_bitmap |= 1<<i;
}
imx233_lradc_setup_delay(LRADC_DELAY_INDEX, trigger_bitmap, 1<<LRADC_DELAY_INDEX, 0, 100);
imx233_lradc_kick_delay(LRADC_DELAY_INDEX);
}
static void enter_state(enum touch_state_t state)
{
touch_state = state;
switch(state)
{
case TOUCH_STATE_WAIT:
imx233_lradc_setup_touch(false, false, false, false, true);
imx233_lradc_enable_channel_irq(touch_chan, false);
imx233_lradc_enable_touch_detect_irq(true);
break;
case TOUCH_STATE_MEASURE_X:
kick_measure(true, false, false, HW_LRADC_CHANNEL_YPLUS);
break;
case TOUCH_STATE_MEASURE_Y:
kick_measure(false, true, false, HW_LRADC_CHANNEL_XPLUS);
break;
case TOUCH_STATE_VERIFY:
kick_measure(false, false, true, HW_LRADC_CHANNEL_YPLUS);
break;
}
}
