Marlin_Firmware/Marlin/src/feature/dac/dac_mcp4728.h

/**
 * Marlin 3D Printer Firmware
 * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
 *
 * Based on Sprinter and grbl.
 * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */
#pragma once

/**
 * Arduino library for MicroChip MCP4728 I2C D/A converter.
 */

#include "../../core/types.h"

#include <Wire.h>

/**
 * The following three macros are only used in this piece of code related to mcp4728.
 * They are defined in the standard Arduino framework but could be undefined in 32 bits Arduino frameworks.
 * (For instance not defined in Arduino lpc176x framework)
 * So we have to define them if needed.
 */
#ifndef word
  #define word(h, l)  ((uint8_t) ((h << 8) | l))
#endif

#ifndef lowByte
  #define lowByte(w)  ((uint8_t) ((w) & 0xFF))
#endif

#ifndef highByte
  #define highByte(w) ((uint8_t) ((w) >> 8))
#endif

#define defaultVDD     DAC_STEPPER_MAX //was 5000 but differs with internal Vref
#define BASE_ADDR      0x60
#define RESET          0b00000110
#define WAKE           0b00001001
#define UPDATE         0b00001000
#define MULTIWRITE     0b01000000
#define SINGLEWRITE    0b01011000
#define SEQWRITE       0b01010000
#define VREFWRITE      0b10000000
#define GAINWRITE      0b11000000
#define POWERDOWNWRITE 0b10100000
#define GENERALCALL    0b00000000
#define GAINWRITE      0b11000000

// This is taken from the original lib, makes it easy to edit if needed
// DAC_OR_ADDRESS defined in pins_BOARD.h  file
#define DAC_DEV_ADDRESS (BASE_ADDR | DAC_OR_ADDRESS)

class MCP4728 {
public:
  static void     init();
  static uint8_t  analogWrite(const uint8_t channel, const uint16_t value);
  static uint8_t  eepromWrite();
  static uint8_t  setVref_all(const uint8_t value);
  static uint8_t  setGain_all(const uint8_t value);
  static uint16_t getValue(const uint8_t channel);
  static uint8_t  fastWrite();
  static uint8_t  simpleCommand(const byte simpleCommand);
  static uint8_t  getDrvPct(const uint8_t channel);
  static void     setDrvPct(xyze_uint_t &pct);
};

extern MCP4728 mcp4728;