ardupilot/libraries/AP_ADC/AP_ADC.h

#ifndef AP_ADC_H
#define AP_ADC_H

#include <stdint.h>

/*
	AP_ADC.cpp - Analog Digital Converter Base Class for Ardupilot Mega
	Code by James Goppert. DIYDrones.com

	This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

	Methods:
		Init() : Initialization of ADC. (interrupts etc)
		Ch(ch_num) : Return the ADC channel value
		Ch6(channel_numbers, result) : Return 6 ADC channel values
*/

class AP_ADC
{
  public:
	AP_ADC() {};  // Constructor
	virtual void Init() {};

	/* read one channel value */
	virtual uint16_t Ch(uint8_t ch_num) = 0;

	/* read 6 channels values as a set, used by IMU for 3 gyros
	   and 3 accelerometeres.

	   Pass in an array of 6 channel numbers and results are
	   returned in result[]

	   The function returns the amount of time (in microseconds)
	   since the last call to Ch6().
	*/
	virtual uint32_t Ch6(const uint8_t *channel_numbers, uint16_t *result) = 0;

  private:
};

#include "AP_ADC_ADS7844.h"
#include "AP_ADC_HIL.h"

#endif