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8.6.2.3 Sensor event handler routine
void tap_handler (volatile void * in)
{
// Set pointer to input descriptor address
sensor_event_desc_t * const event = (sensor_event_desc_t *) in;
// Copy data – note 'arg' = address of 'tap_data' structure
*((sensor_data_t *)(event->arg)) = event->data;
// Check number of taps detected
if (event->data.tap.count == 1) {
// single tap
/* do actions for single tap detect */
} else if (event->data.tap.count == 2)
// double tap
/* do actions for double tap detect */
}
// Check axis on which tap was detected
switch (event->data.tap.axis) {
case SENSOR_TAP_AXIS_X:
/* do actions for X axis tap detect */
break;
case SENSOR_TAP_AXIS_Y:
/* do actions for Y axis tap detect */
break;
case SENSOR_TAP_AXIS_Z:
/* do actions for Y axis tap detect */
break;
}
// Check direction of tap (on above axis)
switch (event->data.tap.direction) {
case SENSOR_TAP_DIRECTION_POS:
/* do actions for positive direction tap detect */
break;
case SENSOR_TAP_DIRECTION_NEG:
/* do actions for negative direction tap detect */
break;
}
}
26
Atmel AVR4016
8367B-AVR-06/11
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