/**
* \brief Touch Library & Sensors Intialization
* - Register the CAT interrupt with priority level 3
* - Initialize the touch library
* - Intilialize the Autonomous touch sensor
*
* \retval STATUS_OK Configuration success
* \retval ERR_INVALID_ARG Error in configuration parameters
*/
static status_code_t touch_api_init()
{
touch_ret_t touch_ret = TOUCH_SUCCESS;
/* Enable CAT PBA clock */
sysclk_enable_pba_module(SYSCLK_CAT);
/* Disable global interrupts */
cpu_irq_disable();
/*
* Initialize the interrupt vectors
* Note: This function does nothing for IAR as the interrupts are
*handled
* by the IAR compiler itself. It provides an abstraction between GCC &
* IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_initialize_vectors();
/*
* Register the Touch Library CAT interrupt handler to the interrupt
* controller.
* Note: The Touch Library CAT interrupt level for the case
* of IAR is fixed to Interrupt level 3. This function does nothing for
* IAR as the interrupts are handled by the IAR compiler itself. It
* provides an abstraction between GCC & IAR compiler to use interrupts.
* Refer function implementation in interrupt_avr32.h
*/
irq_register_handler(&touch_acq_done_irq, AVR32_CAT_IRQ, 3);
/* Enable global interrupt */
cpu_irq_enable();
/* Initialize touch library and CAT module for Autonomous QTouch
* operation. */
touch_ret = touch_at_sensor_init(&touch_config);
/* Check API Error return code. */
if (touch_ret != TOUCH_SUCCESS) {
return ERR_INVALID_ARG;
}
/*
* Enable Autonomous QTouch sensor for continuous acquisition. IN_TOUCH
* or OUT_OF_TOUCH status is continuously updated until the sensor is
* disabled using the touch_at_sensor_disable() API.
*/
touch_ret
= touch_at_sensor_enable(touch_at_status_change_interrupt_callback);
/* Check API Error return code. */
if (touch_ret != TOUCH_SUCCESS) {
return ERR_INVALID_ARG;
}
return STATUS_OK;
} /* End of touch_api_init() */
/*! \brief This API is used to enable Autonomous QTouch Sensor that can
* be used to Wakeup the CPU from Deep-Sleep modes.
* \return touch_ret_t: QTouch Library Error status.
*/
touch_ret_t
touch_autonomous_sensor_enable (void)
{
touch_ret_t touch_ret = TOUCH_SUCCESS;
touch_ret =
touch_at_sensor_enable( &touch_config );
if (touch_ret != TOUCH_SUCCESS)
{
while (1); /* Check API Error return code. */
}
return (touch_ret);
}
