void configure_adc_callbacks(void)
{
//! [setup_register_callback]
adc_register_callback(&adc_instance,
adc_complete_callback, ADC_CALLBACK_READ_BUFFER);
//! [setup_register_callback]
//! [setup_enable_callback]
adc_enable_callback(&adc_instance, ADC_CALLBACK_READ_BUFFER);
//! [setup_enable_callback]
}
/**
* \internal
* \brief Setup Function: ADC window mode test.
*
* This function initializes the ADC in window mode.
* Upper and lower threshold values are provided.
* It also registers & enables callback for window detection.
*
* \param test Current test case.
*/
static void setup_adc_window_mode_test(const struct test_case *test)
{
enum status_code status = STATUS_ERR_IO;
interrupt_flag = false;
/* Set 0.5V DAC output */
dac_chan_write(&dac_inst, DAC_CHANNEL_0, DAC_VAL_HALF_VOLT);
delay_ms(1);
/* Skip test if ADC initialization failed */
test_assert_true(test, adc_init_success,
"Skipping test due to failed initialization");
/* Disable ADC before initialization */
adc_disable(&adc_inst);
struct adc_config config;
adc_get_config_defaults(&config);
config.positive_input = ADC_POSITIVE_INPUT_PIN2;
config.negative_input = ADC_NEGATIVE_INPUT_GND;
#if (SAML21)
config.reference = ADC_REFERENCE_INTREF;
config.clock_prescaler = ADC_CLOCK_PRESCALER_DIV16;
#else
config.reference = ADC_REFERENCE_INT1V;
#endif
config.clock_source = GCLK_GENERATOR_3;
#if !(SAML21)
config.gain_factor = ADC_GAIN_FACTOR_1X;
#endif
config.resolution = ADC_RESOLUTION_12BIT;
config.freerunning = true;
config.window.window_mode = ADC_WINDOW_MODE_BETWEEN_INVERTED;
config.window.window_lower_value = (ADC_VAL_DAC_HALF_OUTPUT - ADC_OFFSET);
config.window.window_upper_value = (ADC_VAL_DAC_HALF_OUTPUT + ADC_OFFSET);
/* Re-initialize & enable ADC */
status = adc_init(&adc_inst, ADC, &config);
test_assert_true(test, status == STATUS_OK,
"ADC initialization failed");
status = adc_enable(&adc_inst);
test_assert_true(test, status == STATUS_OK,
"ADC enabling failed");
/* Register and enable window mode callback */
adc_register_callback(&adc_inst, adc_user_callback,
ADC_CALLBACK_WINDOW);
adc_enable_callback(&adc_inst, ADC_CALLBACK_WINDOW);
/* Start ADC conversion */
adc_start_conversion(&adc_inst);
}
/**
* \internal
* \brief Setup Function: ADC callback mode test.
*
* This function initializes the ADC result buffer and
* registers & enables callback for the ADC buffer read.
*
* \param test Current test case.
*/
static void setup_adc_callback_mode_test(const struct test_case *test)
{
interrupt_flag = false;
/* Skip test if ADC initialization failed */
test_assert_true(test, adc_init_success,
"Skipping test due to failed initialization");
/* Initialize ADC buffer */
for (uint8_t i = 0; i < ADC_SAMPLES; i++) {
adc_buf[i] = 0;
}
/* Register and enable buffer read callback */
adc_register_callback(&adc_inst, adc_user_callback,
ADC_CALLBACK_READ_BUFFER);
adc_enable_callback(&adc_inst, ADC_CALLBACK_READ_BUFFER);
}
