DFRobot_MCP4725

• 中文版

MCP4725 is a 12-bit I2C-driven high precision DAC module. It has an EEPROM inside, means that the DAC will retain the current voltage output after power-down or reset.

Product Link (https://www.dfrobot.com.cn/goods-1728.html)

SKU: DFR0552

Table of Contents

• Summary
• Installation
• Methods
• Compatibility
• History
• Credits

Summary

Provides an Arduino library for reading and interpreting Bosch MCP4725 data over I2C.

Installation

To use this library, please download the library file first and paste it into the \Arduino\libraries directory, then open the examples folder and run the demo in the folder.

Methods

  /**
   * @fn init
   * @brief init MCP4725 device
   * @param addr Init the IIC address.
   * @param vRefSetting the base voltage of DAC must equal the power supply voltage, and the unit is millivolt.
   * @return None
   */
  void init(uint8_t addr, uint16_t vRef);

  /**
   * @fn setMode
   * @brief set power mode 
   * @param powerMode Set power mode,three are normal mode and power down mode.
   * @n               The following are three modes of power down.
   * @n               MCP4725_POWER_DOWN_1KRES      1 kΩ resistor to ground
   * @n               MCP4725_POWER_DOWN_100KRES    100 kΩ resistor to ground
   * @n               MCP4725_POWER_DOWN_500KRES    500 kΩ resistor to ground
   * @return None
   */
  void setMode(uint8_t powerMode);
  
  /** 
   * @fn outputVoltage
   * @brief  Output voltage value range 0-5000mv.   
   * @param  voltage Voltage value, range 0-5000, unit millivolt.
   * @return None
   */
  void outputVoltage(uint16_t voltage);

  /**
   * @fn  outputVoltageEEPROM
   * @brief  Output voltage value range 0-5000mv and write to the EEPROM,
   * @n      meaning that the DAC will retain the current voltage output
   * @n      after power-down or reset.
   * @param  voltage Voltage value, range 0-5000, unit millivolt.
   * @return None
   */
  void outputVoltageEEPROM(uint16_t voltage);

  /**
   * @fn outputSin
   * @brief  Output a sine wave.
   * @param  amp amp value, output sine wave amplitude range 0-5000mv
   * @param  freq freq value, output sine wave frequency
   * @param  offset offset value, output sine wave DC offset
   * @return None
   */
  void outputSin(uint16_t amp, uint16_t freq, uint16_t offset);

  /**
   * @fn outputTriangle
   * @brief  Output a sine wave.    
   * @param  amp amp value, output triangular wave amplitude range 0-5000mv
   * @param  freq freq value, output the triangle wave frequency
   * @param  offset offset value, output the DC offset of the triangle wave
   * @param  dutyCycle dutyCycle value, set the rising percentage of the triangle wave as a percentage of the entire cycle.
   * @n      Value range 0-100 (0 for only the decline of 100, only the rise of paragraph)
   * @return None
   */
  void outputTriangle(uint16_t amp, uint16_t freq, uint16_t offset, uint8_t dutyCycle);

Compatibility

MCU	Work Well	Work Wrong	Untested	Remarks
FireBeetle-ESP32	√
FireBeetle-ESP8266	√
Arduino uno	√

History

• 2018/01/15 Version 1.0.0 released.
• 2022/03/23 Version 1.0.1 released.

Credits

Written by DFRobot_xiaowu (xiao.wu@dfrobot.com), 2022. (Welcome to our website)