#pragma once
//
//    FILE: DAC8554.h
//  AUTHOR: Rob Tillaart
// PURPOSE: Arduino library for DAC8554 SPI Digital Analog Convertor  
// VERSION: 0.2.4
// HISTORY: See DAC8554.cpp
//     URL: https://github.com/RobTillaart/DAC8554
//

#include "Arduino.h"
#include "SPI.h"

#define DAC8554_LIB_VERSION                       (F("0.2.4"))

#define DAC8554_POWERDOWN_NORMAL                  0x00
#define DAC8554_POWERDOWN_1K                      0x40
#define DAC8554_POWERDOWN_100K                    0x80
#define DAC8554_POWERDOWN_HIGH_IMP                0xC0


class DAC8554
{
public:
  // hardware SPI constructor
  DAC8554(uint8_t slaveSelect, uint8_t address = 0);  // address is 0,1,2,3

  // software SPI constructor
  DAC8554(uint8_t spiData, uint8_t spiClock, uint8_t slaveSelect, uint8_t address = 0);

  void     begin();


  void     bufferValue(uint8_t channel, uint16_t value);
  void     setValue(uint8_t channel, uint16_t value);
  uint16_t getValue(uint8_t channel);
  //writes the value to the channel but does not affect buffered ones
  void     setSingleValue(uint8_t channel, uint16_t value);


  void     bufferPowerDown(uint8_t channel, uint8_t powerDownMode);
  void     setPowerDown(uint8_t channel, uint8_t powerDownMode);
  uint8_t  getPowerDownMode(uint8_t channel);
  void     setSinglePowerDown(uint8_t channel, uint8_t powerDownMode);


  // write all buffers to all(up to 4) 8554's channel's
  void     broadcastBuffer();
  // write value to all(up to 4) 8554's channel's
  void     broadcastValue(uint16_t value);
  // write powerDownMode to all 8554's channel's
  void     broadcastPowerDown(uint8_t powerDownMode);


  //       speed in Hz
  void     setSPIspeed(uint32_t speed);
  uint32_t getSPIspeed() { return _SPIspeed; };


  bool     usesHWSPI() { return _hwSPI; };


  // ESP32 specific
  #if defined(ESP32)
  void     selectHSPI() { _useHSPI = true;  };
  void     selectVSPI() { _useHSPI = false; };
  bool     usesHSPI()   { return _useHSPI;  };
  bool     usesVSPI()   { return !_useHSPI; };


  // to overrule ESP32 default hardware pins
  void     setGPIOpins(uint8_t clk, uint8_t miso, uint8_t mosi, uint8_t select);
  #endif


private:
  uint8_t  _dataOut     = 255;
  uint8_t  _clock       = 255;
  uint8_t  _select      = 255;

  bool     _hwSPI       = false;
  uint8_t  _address;

  uint16_t _value[4];     // holdes last written / buffered value per channel
  uint8_t  _register[4];  // holds powerDownMode per channel

  uint32_t _SPIspeed    = 16000000;

  void     writeDevice(uint8_t configRegister, uint16_t value);
  void     swSPI_transfer(uint8_t value);


  SPIClass    * mySPI;
  SPISettings _spi_settings;

  #if defined(ESP32)
  bool        _useHSPI = true;
  #endif
};


// -- END OF FILE --