/**
* \brief Main function.
*/
int main(void)
{
enum ac_status_t status;
pmic_init();
board_init();
sysclk_init();
sleepmgr_init();
ac_set_interrupt_callback(&ACA, example_aca_interrupt_callback);
/* Write configuration of analog comparator A channel 0. */
ac_write_config(&ACA, 0, &aca0_config);
/* Write predefined configuration of analog comparator A channel 1. */
ac_write_config(&ACA, 1, &aca1_config);
/* Enable all the analog comparator channels. */
ac_enable(&ACA, 0);
ac_enable(&ACA, 1);
/*
* Wait for analog comparator to stabilize (muxing, voltage scaler,
* bandgap voltage, etc).
*/
mdelay(1);
/* Check comparator status and initialize the LEDs. */
status = ac_get_status(&ACA, 0);
example_ac_update_single_leds(0, status);
status = ac_get_status(&ACA, 1);
example_ac_update_single_leds(1, status);
cpu_irq_enable();
for (;;) {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
}
}
/**
* \brief Analog comparator interrupt callback function
*
* This function is called when an interrupt has occurred on a channel in analog
* comparator.
*
* \param ac Pointer to the analog comparator (AC) base address which caused
* the interrupt
* \param channel The analog comparator channel that caused the interrupt
* \param status Analog comparator window status given by a \ref ac_status_t
* value
*/
static void example_aca_interrupt_callback(AC_t *ac, uint8_t channel,
enum ac_status_t status)
{
/*
* If trigger was caused by moving into above or below, switch to
* trigger by being inside. If trigger was caused by moving inside the
* window, switch to trigger on outside.
*/
if (status != AC_STATUS_INSIDE) {
ac_set_interrupt_mode(&aca_config, AC_INT_MODE_INSIDE_WINDOW);
} else {
ac_set_interrupt_mode(&aca_config, AC_INT_MODE_OUTSIDE_WINDOW);
}
ac_disable(&ACA, 1);
ac_disable(&ACA, 0);
ac_write_config(&ACA, 0, &aca_config);
ac_enable(&ACA, 0);
ac_enable(&ACA, 1);
example_ac_update_window_leds(status);
}
/**
* \brief Main function.
*/
int main(void)
{
enum ac_status_t status;
pmic_init();
board_init();
sysclk_init();
sleepmgr_init();
ac_set_interrupt_callback(&ACA, example_aca_interrupt_callback);
/* Setup the analog comparator B in window mode. */
ac_set_mode(&aca_config, AC_MODE_WINDOW);
ac_set_voltage_scaler(&aca_config, 11);
ac_set_hysteresis(&aca_config, AC_HYSMODE_LARGE_gc);
ac_set_negative_reference(&aca_config, AC_MUXNEG_SCALER_gc);
ac_set_positive_reference(&aca_config, AC_MUXPOS_PIN1_gc);
ac_set_interrupt_mode(&aca_config, AC_INT_MODE_INSIDE_WINDOW);
ac_set_interrupt_level(&aca_config, AC_INT_LVL_MED);
/*
* Write configuration of analog comparator B channel 0, half of window
* configuration.
*/
ac_write_config(&ACA, 0, &aca_config);
/* Set the lower reference of the compare window. */
ac_set_negative_reference(&aca_config, AC_MUXNEG_BANDGAP_gc);
/*
* Write configuration of analog comparator B channel 1, other half of
* window configuration.
*/
ac_write_config(&ACA, 1, &aca_config);
/* Enable all the analog comparator channels. */
ac_enable(&ACA, 0);
ac_enable(&ACA, 1);
/*
* Wait for analog comparator to stabilize (muxing, voltage scaler,
* bandgap voltage, etc).
*/
mdelay(1);
/* Check comparator status and initialize the LEDs. */
status = ac_get_status(&ACA, 0);
example_ac_update_window_leds(status);
/*
* Read back analog comparator channel 0 configuration, to be used when
* updating the window interrupt mode in the interrupt callback
* function.
*/
ac_read_config(&ACA, 0, &aca_config);
cpu_irq_enable();
for (;;) {
/* Go to sleep, everything is handled by interrupts. */
sleepmgr_enter_sleep();
}
}
