mirror of https://github.com/esphome/esphome.git
54 lines
1.3 KiB
C++
54 lines
1.3 KiB
C++
#include "libretiny_pwm.h"
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#include "esphome/core/log.h"
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#ifdef USE_LIBRETINY
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namespace esphome {
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namespace libretiny_pwm {
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static const char *const TAG = "libretiny.pwm";
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void LibreTinyPWM::write_state(float state) {
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if (!this->initialized_) {
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ESP_LOGW(TAG, "LibreTinyPWM output hasn't been initialized yet!");
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return;
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}
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if (this->pin_->is_inverted())
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state = 1.0f - state;
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this->duty_ = state;
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const uint32_t max_duty = (uint32_t(1) << this->bit_depth_) - 1;
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const float duty_rounded = roundf(state * max_duty);
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auto duty = static_cast<uint32_t>(duty_rounded);
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analogWrite(this->pin_->get_pin(), duty); // NOLINT
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}
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void LibreTinyPWM::setup() {
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this->update_frequency(this->frequency_);
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this->turn_off();
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}
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void LibreTinyPWM::dump_config() {
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ESP_LOGCONFIG(TAG, "PWM Output:");
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LOG_PIN(" Pin ", this->pin_);
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ESP_LOGCONFIG(TAG, " Frequency: %.1f Hz", this->frequency_);
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}
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void LibreTinyPWM::update_frequency(float frequency) {
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this->frequency_ = frequency;
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// force changing the frequency by removing PWM mode
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this->pin_->pin_mode(gpio::FLAG_INPUT);
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analogWriteResolution(this->bit_depth_); // NOLINT
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analogWriteFrequency(frequency); // NOLINT
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this->initialized_ = true;
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// re-apply duty
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this->write_state(this->duty_);
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}
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} // namespace libretiny_pwm
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} // namespace esphome
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#endif
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