//! [setup_14]
void configure_ac_callback(void)
{
//! [setup_15]
ac_register_callback(&ac_instance, callback_function_ac, AC_CALLBACK_COMPARATOR_0);
//! [setup_15]
//! [setup_16]
ac_enable_callback(&ac_instance, AC_CALLBACK_COMPARATOR_0);
//! [setup_16]
}
/**
* \internal
* \brief Setup Function: AC callback mode test.
*
* This function initializes the AC to generate interrupt when the AC
* output toggles.
*
* \param test Current test case.
*/
static void setup_ac_callback_mode_test(const struct test_case *test)
{
enum status_code status = STATUS_ERR_IO;
/* Structure for AC configuration */
struct ac_config config;
struct ac_chan_config channel_config;
/* Set the flag to false */
ac_init_success = false;
ac_reset(&ac_inst);
ac_get_config_defaults(&config);
/* Initialize the AC */
status = ac_init(&ac_inst, AC, &config);
/* Check for successful initialization */
test_assert_true(test, status == STATUS_OK,
"AC initialization failed");
/* Configure the AC input pin */
struct system_pinmux_config ac0_pin_conf;
system_pinmux_get_config_defaults(&ac0_pin_conf);
ac0_pin_conf.direction = SYSTEM_PINMUX_PIN_DIR_INPUT;
ac0_pin_conf.mux_position = MUX_PA04B_AC_AIN0;
system_pinmux_pin_set_config(PIN_PA04B_AC_AIN0, &ac0_pin_conf);
/* Channel configuration */
status = STATUS_ERR_IO;
ac_chan_get_config_defaults(&channel_config);
channel_config.sample_mode = AC_CHAN_MODE_CONTINUOUS;
channel_config.positive_input = AC_CHAN_POS_MUX_PIN0;
channel_config.negative_input = AC_CHAN_NEG_MUX_SCALED_VCC;
channel_config.vcc_scale_factor = AC_SCALER_0_50_VOLT;
status
= ac_chan_set_config(&ac_inst, AC_CHAN_CHANNEL_0,
&channel_config);
/* Check for successful initialization */
test_assert_true(test, status == STATUS_OK,
"AC channel initialization failed");
/* Callback configuration */
status = ac_register_callback(&ac_inst, ac_user_callback,
AC_CALLBACK_COMPARATOR_0);
test_assert_true(test, status == STATUS_OK,
"AC callback registration failed");
/* Enable the AC channel & the module */
ac_chan_enable(&ac_inst, AC_CHAN_CHANNEL_0);
ac_enable(&ac_inst);
ac_enable_callback(&ac_inst, AC_CALLBACK_COMPARATOR_0);
if (status == STATUS_OK) {
ac_init_success = true;
}
}