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59 lines
1.7 KiB
C++
59 lines
1.7 KiB
C++
#ifdef USE_ESP8266
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#include "esp8266_pwm.h"
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#include "esphome/core/macros.h"
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#include "esphome/core/defines.h"
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#include "esphome/core/log.h"
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#include "esphome/core/helpers.h"
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#include <core_esp8266_waveform.h>
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namespace esphome {
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namespace esp8266_pwm {
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static const char *const TAG = "esp8266_pwm";
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void ESP8266PWM::setup() {
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ESP_LOGCONFIG(TAG, "Setting up ESP8266 PWM Output...");
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this->pin_->setup();
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this->turn_off();
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}
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void ESP8266PWM::dump_config() {
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ESP_LOGCONFIG(TAG, "ESP8266 PWM:");
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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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LOG_FLOAT_OUTPUT(this);
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}
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void HOT ESP8266PWM::write_state(float state) {
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this->last_output_ = state;
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// Also check pin inversion
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if (this->pin_->is_inverted()) {
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state = 1.0f - state;
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}
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auto total_time_us = static_cast<uint32_t>(roundf(1e6f / this->frequency_));
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auto duty_on = static_cast<uint32_t>(roundf(total_time_us * state));
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uint32_t duty_off = total_time_us - duty_on;
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if (duty_on == 0) {
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// This is a hacky fix for servos: Servo PWM high time is maximum 2.4ms by default
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// The frequency check is to affect this fix for servos mostly as the frequency is usually 50-300 hz
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if (this->pin_->digital_read() && 50 <= this->frequency_ && this->frequency_ <= 300) {
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delay(3);
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}
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stopWaveform(this->pin_->get_pin());
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this->pin_->digital_write(this->pin_->is_inverted());
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} else if (duty_off == 0) {
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stopWaveform(this->pin_->get_pin());
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this->pin_->digital_write(!this->pin_->is_inverted());
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} else {
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startWaveform(this->pin_->get_pin(), duty_on, duty_off, 0);
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}
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}
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} // namespace esp8266_pwm
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} // namespace esphome
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#endif
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