esp32_dac.cpp

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#include "esp32_dac.h"
#include "esphome/core/log.h"
#include "esphome/core/helpers.h"
 
#ifdef USE_ESP32
 
#ifdef USE_ARDUINO
#include <esp32-hal-dac.h>
#endif
 
namespace esphome {
namespace esp32_dac {
 
#ifdef USE_ESP32_VARIANT_ESP32S2
static constexpr uint8_t DAC0_PIN = 17;
#else
static constexpr uint8_t DAC0_PIN = 25;
#endif
 
static const char *const TAG = "esp32_dac";
 
void ESP32DAC::setup() {
  ESP_LOGCONFIG(TAG, "Setting up ESP32 DAC Output...");
  this->pin_->setup();
  this->turn_off();
 
#ifdef USE_ESP_IDF
  const dac_channel_t channel = this->pin_->get_pin() == DAC0_PIN ? DAC_CHAN_0 : DAC_CHAN_1;
  const dac_oneshot_config_t oneshot_cfg{channel};
  dac_oneshot_new_channel(&oneshot_cfg, &this->dac_handle_);
#endif
}
 
void ESP32DAC::on_safe_shutdown() {
#ifdef USE_ESP_IDF
  dac_oneshot_del_channel(this->dac_handle_);
#endif
}
 
void ESP32DAC::dump_config() {
  ESP_LOGCONFIG(TAG, "ESP32 DAC:");
  LOG_PIN("  Pin: ", this->pin_);
  LOG_FLOAT_OUTPUT(this);
}
 
void ESP32DAC::write_state(float state) {
  if (this->pin_->is_inverted())
    state = 1.0f - state;
 
  state = state * 255;
 
#ifdef USE_ESP_IDF
  dac_oneshot_output_voltage(this->dac_handle_, state);
#endif
#ifdef USE_ARDUINO
  dacWrite(this->pin_->get_pin(), state);
#endif
}
 
}  // namespace esp32_dac
}  // namespace esphome
 
#endif