/**
* \brief Callback function for ADCB-CH0 interrupts
* - Interrupt is configured for Conversion Complete Interrupt
* - ADCA CH0 result is accumulated
* - ADC sample count is incremented
* - Check If ADC sample count reached up to number of oversampling required
* - If so, disable ADC interrupt and set flag to start oversampling process
*
* \param adc Pointer to ADC module.
* \param ch_mask ADC channel mask.
* \param result Conversion result from ADC channel.
*/
static void adc_handler(ADC_t *adc, uint8_t ch_mask, adc_result_t result)
{
/* Get Result from ADCB-CH0 Register and Accumulate */
adc_result_accumulator += result;
/* Increment sample count */
adc_samplecount++;
/* Check if sample count has reached oversample count */
if (adc_samplecount >= ADC_OVER_SAMPLED_NUMBER) {
/* Disable ADCB-CHO conversion complete interrupt until stored
* samples are processed
*/
adcch_disable_interrupt(&adc_ch_conf);
adcch_write_configuration(&ADCB, ADC_CH0, &adc_ch_conf);
/* Clear any pending interrupt request by clearing interrupt
* flag
*/
adc_clear_interrupt_flag(&ADCB, ADC_CH0);
/*Set adc_oversampled_flag to start oversampling process from
* main function
*/
adc_oversampled_flag = true;
/* Store single sample ADC result to find analog input without
* oversampling
*/
adc_result_one_sample = result;
}
}
int get_adc(){
uint8_t adc_value; /* sensor ADC value */
ADCSRA |= _BV(ADSC); // start ADC conversion
while(adc_conversion_in_progress());
adc_value = ADCH;
adc_clear_interrupt_flag();
return(adc_value);
}
/**
* \brief Wrapper function for getting and ADC sample
*
* \param adc_ch which channel to get the ADC samples from
* /returns 16-bit signed ADC result
*/
static int16_t adc_get_sample(uint8_t adc_ch)
{
int16_t result = 0;
adc_start_conversion(&CALIBRATION_ADC, adc_ch);
adc_wait_for_interrupt_flag(&CALIBRATION_ADC, adc_ch);
result = adc_get_result(&CALIBRATION_ADC, adc_ch);
adc_clear_interrupt_flag(&CALIBRATION_ADC, adc_ch);
return result;
}
