text: /*----------------------------------------------------------------------------*/
  /* Copyright (c) 2016-2018 FIRST. All Rights Reserved.                        */
  /* Open Source Software - may be modified and shared by FRC teams. The code   */
  /* must be accompanied by the FIRST BSD license file in the root directory of */
  /* the project.                                                               */
  /*----------------------------------------------------------------------------*/
  
  #pragma once
  
  #include <stdint.h>
  
  #include <memory>
  
  #include <support/mutex.h>
  
  #include "HAL/Ports.h"
  #include "HAL/handles/IndexedHandleResource.h"
  #include "PortsInternal.h"
  
  namespace hal {
  
  constexpr int32_t kTimebase = 40000000;  ///< 40 MHz clock
  constexpr int32_t kDefaultOversampleBits = 0;
  constexpr int32_t kDefaultAverageBits = 7;
  constexpr double kDefaultSampleRate = 50000.0;
  static constexpr uint32_t kAccumulatorChannels[] = {0, 1};
  
  //extern std::unique_ptr<tAI> analogInputSystem;
  //extern std::unique_ptr<tAO> analogOutputSystem;
  extern wpi::mutex analogRegisterWindowMutex;
  extern bool analogSampleRateSet;
  
  struct AnalogPort {
    uint8_t channel;
    //std::unique_ptr<tAccumulator> accumulator;
    void * accumulator; // temp?
  };
  
  extern IndexedHandleResource<HAL_AnalogInputHandle, hal::AnalogPort,
                               kNumAnalogInputs, HAL_HandleEnum::AnalogInput>*
      analogInputHandles;
  
  int32_t getAnalogNumActiveChannels(int32_t* status);
  int32_t getAnalogNumChannelsToActivate(int32_t* status);
  void setAnalogNumChannelsToActivate(int32_t channels);
  void setAnalogSampleRate(double samplesPerSecond, int32_t* status);
  void initializeAnalog(int32_t* status);
  
  }  // namespace hal
  