#pragma once
//
//    FILE: PCA9635.h
//  AUTHOR: Rob Tillaart
//    DATE: 23-apr-2016
// VERSION: 0.4.1
// PURPOSE: Arduino library for PCA9635 I2C LED driver, 16 channel
//     URL: https://github.com/RobTillaart/PCA9635


#include "Arduino.h"
#include "Wire.h"


#define PCA9635_LIB_VERSION         (F("0.4.1"))

#define PCA9635_MODE1               0x00
#define PCA9635_MODE2               0x01

//  0x80 bit ==> Auto-Increment for all registers.
//               used in writeN() - see issue #9 PCA9634
#define PCA9635_PWM(x)              (0x82+(x))

#define PCA9635_GRPPWM              0x12
#define PCA9635_GRPFREQ             0x13

//  check datasheet for details
#define PCA9635_LEDOUT_BASE         0x14    // 0x14..0x17
#define PCA9635_LEDOFF              0x00    // default @ startup
#define PCA9635_LEDON               0x01
#define PCA9635_LEDPWM              0x02
#define PCA9635_LEDGRPPWM           0x03

//  Error codes
#define PCA9635_OK                  0x00
#define PCA9635_ERROR               0xFF
#define PCA9635_ERR_WRITE           0xFE
#define PCA9635_ERR_CHAN            0xFD
#define PCA9635_ERR_MODE            0xFC
#define PCA9635_ERR_REG             0xFB
#define PCA9635_ERR_I2C             0xFA


// Configuration bits MODE1 register
#define PCA9635_MODE1_AUTOINCR2     0x80  // ReadOnly, 0 = disable  1 = enable
#define PCA9635_MODE1_AUTOINCR1     0x40  // ReadOnly, bit1
#define PCA9635_MODE1_AUTOINCR0     0x20  // ReadOnly, bit0
#define PCA9635_MODE1_SLEEP         0x10  // 0 = normal       1 = sleep
#define PCA9635_MODE1_SUB1          0x08  // 0 = disable      1 = enable
#define PCA9635_MODE1_SUB2          0x04  // 0 = disable      1 = enable
#define PCA9635_MODE1_SUB3          0x02  // 0 = disable      1 = enable
#define PCA9635_MODE1_ALLCALL       0x01  // 0 = disable      1 = enable
#define PCA9635_MODE1_NONE          0x00

// Configuration bits MODE2 register
#define PCA9635_MODE2_BLINK         0x20  // 0 = dim          1 = blink
#define PCA9635_MODE2_INVERT        0x10  // 0 = normal       1 = inverted
#define PCA9635_MODE2_ACK           0x08  // 0 = on STOP      1 = on ACK
#define PCA9635_MODE2_TOTEMPOLE     0x04  // 0 = open drain   1 = totem-pole
#define PCA9635_MODE2_NONE          0x00

// NOT IMPLEMENTED YET
#define PCA9635_SUBADR(x)           (0x17+(x))  // x = 1..3
#define PCA9635_ALLCALLADR          0x1B


class PCA9635
{
public:
  explicit PCA9635(const uint8_t deviceAddress, TwoWire *wire = &Wire);

#if defined (ESP8266) || defined(ESP32)
  bool     begin(int sda, int scl, 
                     uint8_t mode1_mask = PCA9635_MODE1_ALLCALL, 
                     uint8_t mode2_mask = PCA9635_MODE2_NONE);
#endif
  bool     begin(uint8_t mode1_mask = PCA9635_MODE1_ALLCALL, 
                 uint8_t mode2_mask = PCA9635_MODE2_NONE);
  void     configure(uint8_t mode1_mask, uint8_t mode2_mask);
  bool     isConnected();

  uint8_t  channelCount() { return _channelCount; };

  uint8_t  setLedDriverMode(uint8_t channel, uint8_t mode);
  uint8_t  getLedDriverMode(uint8_t channel);

  // single PWM setting
  uint8_t  write1(uint8_t channel, uint8_t value);

  // RGB setting, write three consecutive PWM registers
  uint8_t  write3(uint8_t channel, uint8_t R, uint8_t G, uint8_t B);

  // generic worker, write N consecutive PWM registers
  uint8_t  writeN(uint8_t channel, uint8_t* arr, uint8_t count);

  // reg = 1, 2  check datasheet for values
  uint8_t  writeMode(uint8_t reg, uint8_t value);
  uint8_t  readMode(uint8_t reg);
  //  convenience wrappers
  uint8_t  setMode1(uint8_t value) { return writeMode(PCA9635_MODE1, value); };
  uint8_t  setMode2(uint8_t value) { return writeMode(PCA9635_MODE2, value); };
  uint8_t  getMode1()              { return readMode(PCA9635_MODE1); };
  uint8_t  getMode2()              { return readMode(PCA9635_MODE2); };


  // TODO PWM also in %% ?
  void     setGroupPWM(uint8_t value) { writeReg(PCA9635_GRPPWM, value); };
  uint8_t  getGroupPWM() { return readReg(PCA9635_GRPPWM); };

  // TODO set time in milliseconds and round to nearest value?
  void     setGroupFREQ(uint8_t value) { writeReg(PCA9635_GRPFREQ, value); };
  uint8_t  getGroupFREQ() { return readReg(PCA9635_GRPFREQ); };

  int      lastError();

  /////////////////////////////////////////////////////
  //
  // SUB CALL  -  ALL CALL  (since 0.2.0)
  //
  //  nr = { 1, 2, 3 }
  bool     enableSubCall(uint8_t nr);
  bool     disableSubCall(uint8_t nr);
  bool     isEnabledSubCall(uint8_t nr);
  bool     setSubCallAddress(uint8_t nr, uint8_t address);
  uint8_t  getSubCallAddress(uint8_t nr);

  bool     enableAllCall();
  bool     disableAllCall();
  bool     isEnabledAllCall();
  bool     setAllCallAddress(uint8_t address);
  uint8_t  getAllCallAddress();


private:
  // DIRECT CONTROL
  uint8_t  writeReg(uint8_t reg, uint8_t value);  // returns error status.
  uint8_t  readReg(uint8_t reg);

  uint8_t  _address;
  uint8_t  _register;
  uint8_t  _data;
  int      _error;
  uint8_t  _channelCount = 16;

  TwoWire*  _wire;
};


// -- END OF FILE --