Interfacing DS3502 chips without using any Adafruit libraries

DS3502_sample.cpp

// Wire Master Writer
// by Nicholas Zambetti <http://www.zambetti.com>

// Demonstrates use of the Wire library
// Writes data to an I2C/TWI Peripheral device
// Refer to the "Wire Peripheral Receiver" example for use with this

// Created 29 March 2006

// This example code is in the public domain.


#include <Wire.h>

constexpr uint8_t WIPER_ADDR = 0x28;

void setup()
{
  Wire.begin(); // join i2c bus (address optional for master)

  // initialize wiper
  constexpr uint8_t DS3502_INIT_CMD[]{0x02, 0x80};
  Wire.beginTransmission(WIPER_ADDR);
  Wire.write(DS3502_INIT_CMD, sizeof(DS3502_INIT_CMD) / sizeof(DS3502_INIT_CMD[0]));
  Wire.endTransmission()
}

void loop()
{
  static uint8_t value = 0;

  // write actual value
  uint8_t const DS3502_SET_CMD[]{0x00, value};
  Wire.beginTransmission(WIPER_ADDR);
  Wire.write(DS3502_SET_CMD, sizeof(DS3502_SET_CMD) / sizeof(DS3502_SET_CMD[0]));
  Wire.endTransmission();

  value = value < 0x7f ? value + 1 : 0;

  delay(500);
}