process_ADCs.cpp

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/*
 * Software License Agreement (BSD License)
 *
 *  Copyright (c) 2016-17, Universidad de Almeria
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 *     disclaimer in the documentation and/or other materials provided
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 *     contributors may be used to endorse or promote products derived
 *     from this software without specific prior written permission.
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/*Beginning of Auto generated code by Atmel studio */
#include <Arduino.h>
/*End of auto generated code by Atmel studio */

#include "arduinodaq_declarations.h"
#include "arduinodaq2pc-structs.h"

// ADC reading subsystem:
uint8_t        num_active_ADC_channels = 0;
uint8_t        ADC_active_channels[MAX_ADC_CHANNELS] = {0,0,0,0,0,0,0,0};
unsigned long  ADC_last_millis = 0;
uint16_t       ADC_sampling_period_ms = 200;

void processADCs()
{
        if (!num_active_ADC_channels)
                return;

        const unsigned long tnow = millis();

        if (tnow-ADC_last_millis < ADC_sampling_period_ms)
                return;

        ADC_last_millis = tnow;

        uint16_t ADC_readings[MAX_ADC_CHANNELS] =  {0,0,0,0,0,0,0,0};
        
        for (uint8_t i=0;i<num_active_ADC_channels;i++)
        {
                ADC_readings[i] = analogRead(ADC_active_channels[i]);
        }

        // send answer back:
        TFrame_ADC_readings tx;
        tx.payload.timestamp_ms = millis();
        for (int i=0;i<8;i++) {
                tx.payload.adc_data[i] = ADC_readings[i];
        }
        tx.calc_and_update_checksum();

        Serial.write((uint8_t*)&tx,sizeof(tx));
}