PF1550_Io_C33.cpp

/*
  Copyright (c) 2019 Arduino.  All right reserved.

  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.

  This library is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  See the GNU Lesser General Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/******************************************************************************
   INCLUDE
 ******************************************************************************/

#include "PF1550_Io_C33.h"

#ifdef ARDUINO_PORTENTA_H33

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

#include "PF1550_Defines.h"

/******************************************************************************
   CTOR/DTOR
 ******************************************************************************/

PF1550_Io_C33::PF1550_Io_C33(uint8_t const i2c_addr)
: _i2c_addr(i2c_addr)
{

}

/******************************************************************************
   PUBLIC MEMBER FUNCTIONS
 ******************************************************************************/

int PF1550_Io_C33::begin()
{
  Wire3.begin();
  Wire3.setClock(100000);

  /* Enable LED. */
  setBit(Register::CHARGER_LED_PWM, REG_LED_PWM_LED_EN_bp);
  /* Allow LED control by software. */
  setBit(Register::CHARGER_LED_CNFG, REG_LED_CNFG_LEDOVRD_bp);

  return 1;
}

void PF1550_Io_C33::readRegister(Register const reg_addr, uint8_t * data)
{
  uint8_t i2c_data[2];

  i2c_data[0] = (uint8_t)reg_addr;

  writeRegister(_i2c_addr, i2c_data, 1, 1);

  uint8_t retVal = Wire3.requestFrom(_i2c_addr, 1, true);

  if (_debug) {
    _debug->print("requestFrom: ");
    _debug->println(retVal);
  }

  int i = 0;
  while (Wire3.available() && i < 1) {
    data[0] = Wire3.read();
    i++;
  }

  if (_debug) {
    _debug->println("Read:");
    for (i = 0; i < 1; i++) {
      _debug->println(data[i], HEX);
    }
  }
}

void PF1550_Io_C33::writeRegister(uint8_t slave_addr, uint8_t *data, uint8_t data_len, uint8_t restart)
{
  if (_debug)
  {
    _debug->print("Restart: ");
    _debug->println(restart);
    if (!restart)
    {
      _debug->print("PF1550_Io_C33::writeRegister at address=");
      _debug->print(data[0], HEX);
      _debug->print(" data=");
      _debug->println(data[1], HEX);
      _debug->print("i2c slave address: ");
      _debug->println(slave_addr);
    }
    else
    {
      _debug->print("PF1550_Io_C33::Read from register at address=");
      _debug->println(data[0], HEX);
    }
  }

  Wire3.beginTransmission(slave_addr);
  Wire3.write(data, data_len);
  uint8_t retVal = Wire3.endTransmission(restart == 0 ? true : false);

  if (_debug) {
    _debug->print("End transmission: ");
    _debug->println(retVal);
  }
  /*
    if (_debug) {
    _debug->println("Write:");
    for (int i = 0; i < data_len; i++) {
      _debug->println(data[i], HEX);
    }
    }
  */
}

#endif /* ARDUINO_PORTENTA_H33 */