LibXR::ESP32DAC Class Reference

Inheritance diagram for LibXR::ESP32DAC:

Collaboration diagram for LibXR::ESP32DAC:

Public Member Functions
	ESP32DAC (uint8_t channel_id=0, float init_voltage=0.0f, float reference_voltage=3.3f)
ErrorCode	Write (float voltage) override
	输出 DAC 电压
Public Member Functions inherited from LibXR::DAC
	DAC ()=default
	默认构造函数

Private Attributes
uint8_t	channel_id_
float	reference_voltage_
bool	ready_ = false

Detailed Description

Definition at line 19 of file esp_dac.hpp.

Constructor & Destructor Documentation

ESP32DAC()

LibXR::ESP32DAC::ESP32DAC ( uint8_t channel_id = 0, float init_voltage = 0.0f, float reference_voltage = 3.3f )

inlineexplicit

Definition at line 22 of file esp_dac.hpp.

      : channel_id_(channel_id), reference_voltage_(reference_voltage)
  {
#if SOC_DAC_SUPPORTED
    if ((channel_id_ >= SOC_DAC_CHAN_NUM) || (reference_voltage_ <= 0.0f))
    {
      return;
    }
 
    ready_ = true;
    dac_ll_power_on(ToChannel(channel_id_));
    dac_ll_rtc_sync_by_adc(false);
    (void)gpio_config_as_analog(
        static_cast<gpio_num_t>(dac_periph_signal.dac_channel_io_num[channel_id_]));
    (void)Write(init_voltage);
#else
    (void)init_voltage;
#endif
  }

Member Function Documentation

Write()

ErrorCode LibXR::ESP32DAC::Write ( float voltage )

inlineoverridevirtual

输出 DAC 电压

Outputs the DAC voltage

Parameters

voltage	需要输出的模拟电压值
voltage	The analog voltage value to be output

Returns

错误码 ErrorCode

该方法为纯虚函数，子类必须实现此方法以提供具体的 DAC 输出功能。 This is a pure virtual function. Subclasses must implement this method to provide specific DAC output functionality.

Implements LibXR::DAC.

Definition at line 43 of file esp_dac.hpp.

  {
#if SOC_DAC_SUPPORTED
    if (!ready_)
    {
      return ErrorCode::NOT_SUPPORT;
    }
 
    if (voltage < 0.0f)
    {
      voltage = 0.0f;
    }
    else if (voltage > reference_voltage_)
    {
      voltage = reference_voltage_;
    }
 
    constexpr uint32_t MAX_CODE = (1U << SOC_DAC_RESOLUTION) - 1U;
    const float scale = static_cast<float>(MAX_CODE) / reference_voltage_;
    uint32_t code = static_cast<uint32_t>((voltage * scale) + 0.5f);
    if (code > MAX_CODE)
    {
      code = MAX_CODE;
    }
 
    dac_ll_update_output_value(ToChannel(channel_id_), static_cast<uint8_t>(code));
    return ErrorCode::OK;
#else
    (void)voltage;
    return ErrorCode::NOT_SUPPORT;
#endif
  }

Field Documentation

channel_id_

uint8_t LibXR::ESP32DAC::channel_id_

private

Definition at line 84 of file esp_dac.hpp.

ready_

bool LibXR::ESP32DAC::ready_ = false

private

Definition at line 86 of file esp_dac.hpp.

reference_voltage_

float LibXR::ESP32DAC::reference_voltage_

private

Definition at line 85 of file esp_dac.hpp.

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The documentation for this class was generated from the following file:

• driver/esp/esp_dac.hpp