libretiny: replace ledc with libretiny_pwm

CODEOWNERS

@@ -148,6 +148,7 @@ esphome/components/lcd_menu/* @numo68
 esphome/components/ld2410/* @regevbr @sebcaps
 esphome/components/ledc/* @OttoWinter
 esphome/components/libretiny/* @kuba2k2
+esphome/components/libretiny_pwm/* @kuba2k2
 esphome/components/light/* @esphome/core
 esphome/components/lilygo_t5_47/touchscreen/* @jesserockz
 esphome/components/lock/* @esphome/core

esphome/components/ledc/ledc_output.h

@@ -5,7 +5,7 @@
 #include "esphome/core/automation.h"
 #include "esphome/components/output/float_output.h"
 
-#if defined(USE_ESP32) || defined(USE_LIBRETINY)
+#ifdef USE_ESP32
 
 namespace esphome {
 namespace ledc {

esphome/components/ledc/output.py

@@ -9,7 +9,7 @@
     CONF_PIN,
 )
 
-CONFLICTS_WITH = ["esp8266", "rp2040"]
+DEPENDENCIES = ["esp32"]
 
 
 def calc_max_frequency(bit_depth):

esphome/components/libretiny_pwm/__init__.py

@@ -0,0 +1 @@
+CODEOWNERS = ["@kuba2k2"]

esphome/components/ledc/ledc_output_libretiny.cpp → esphome/components/libretiny_pwm/libretiny_pwm.cpp

@@ -1,18 +1,16 @@
-#include "ledc_output.h"
+#include "libretiny_pwm.h"
 #include "esphome/core/log.h"
 
 #ifdef USE_LIBRETINY
 
 namespace esphome {
-namespace ledc {
+namespace libretiny_pwm {
 
-static const char *const TAG = "ledc.output";
+static const char *const TAG = "libretiny.pwm";
 
-uint8_t next_ledc_channel = 0;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
-
-void LEDCOutput::write_state(float state) {
+void LibreTinyPWM::write_state(float state) {
   if (!initialized_) {
-    ESP_LOGW(TAG, "LEDC output hasn't been initialized yet!");
+    ESP_LOGW(TAG, "LibreTinyPWM output hasn't been initialized yet!");
     return;
   }
 
@@ -27,18 +25,18 @@ void LEDCOutput::write_state(float state) {
   analogWrite(this->pin_->get_pin(), duty);  // NOLINT
 }
 
-void LEDCOutput::setup() {
+void LibreTinyPWM::setup() {
   this->update_frequency(this->frequency_);
   this->turn_off();
 }
 
-void LEDCOutput::dump_config() {
+void LibreTinyPWM::dump_config() {
   ESP_LOGCONFIG(TAG, "PWM Output:");
   LOG_PIN("  Pin ", this->pin_);
   ESP_LOGCONFIG(TAG, "  Frequency: %.1f Hz", this->frequency_);
 }
 
-void LEDCOutput::update_frequency(float frequency) {
+void LibreTinyPWM::update_frequency(float frequency) {
   this->bit_depth_ = 10;
   this->frequency_ = frequency;
   // force changing the frequency by removing PWM mode
@@ -50,7 +48,7 @@ void LEDCOutput::update_frequency(float frequency) {
   this->write_state(this->duty_);
 }
 
-}  // namespace ledc
+}  // namespace libretiny_pwm
 }  // namespace esphome
 
 #endif

esphome/components/libretiny_pwm/libretiny_pwm.h

@@ -0,0 +1,55 @@
+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/core/hal.h"
+#include "esphome/core/automation.h"
+#include "esphome/components/output/float_output.h"
+
+#ifdef USE_LIBRETINY
+
+namespace esphome {
+namespace libretiny_pwm {
+
+class LibreTinyPWM : public output::FloatOutput, public Component {
+ public:
+  explicit LibreTinyPWM(InternalGPIOPin *pin) : pin_(pin) {}
+
+  void set_frequency(float frequency) { this->frequency_ = frequency; }
+  /// Dynamically change frequency at runtime
+  void update_frequency(float frequency) override;
+
+  /// Setup LibreTinyPWM.
+  void setup() override;
+  void dump_config() override;
+  /// HARDWARE setup priority
+  float get_setup_priority() const override { return setup_priority::HARDWARE; }
+
+  /// Override FloatOutput's write_state.
+  void write_state(float state) override;
+
+ protected:
+  InternalGPIOPin *pin_;
+  uint8_t bit_depth_{};
+  float frequency_{};
+  float duty_{0.0f};
+  bool initialized_ = false;
+};
+
+template<typename... Ts> class SetFrequencyAction : public Action<Ts...> {
+ public:
+  SetFrequencyAction(LibreTinyPWM *parent) : parent_(parent) {}
+  TEMPLATABLE_VALUE(float, frequency);
+
+  void play(Ts... x) {
+    float freq = this->frequency_.value(x...);
+    this->parent_->update_frequency(freq);
+  }
+
+ protected:
+  LibreTinyPWM *parent_;
+};
+
+}  // namespace libretiny_pwm
+}  // namespace esphome
+
+#endif

esphome/components/libretiny_pwm/output.py

@@ -0,0 +1,74 @@
+from esphome import pins, automation
+from esphome.components import output
+import esphome.config_validation as cv
+import esphome.codegen as cg
+from esphome.const import (
+    CONF_FREQUENCY,
+    CONF_ID,
+    CONF_PIN,
+)
+
+CONFLICTS_WITH = ["esp8266", "esp32", "rp2040"]
+
+
+def calc_max_frequency(bit_depth):
+    return 80e6 / (2**bit_depth)
+
+
+def calc_min_frequency(bit_depth):
+    max_div_num = ((2**20) - 1) / 256.0
+    return 80e6 / (max_div_num * (2**bit_depth))
+
+
+def validate_frequency(value):
+    value = cv.frequency(value)
+    min_freq = calc_min_frequency(20)
+    max_freq = calc_max_frequency(1)
+    if value < min_freq:
+        raise cv.Invalid(
+            f"This frequency setting is not possible, please choose a higher frequency (at least {int(min_freq)}Hz)"
+        )
+    if value > max_freq:
+        raise cv.Invalid(
+            f"This frequency setting is not possible, please choose a lower frequency (at most {int(max_freq)}Hz)"
+        )
+    return value
+
+
+libretinypwm_ns = cg.esphome_ns.namespace("libretiny_pwm")
+LibreTinyPWM = libretinypwm_ns.class_("LibreTinyPWM", output.FloatOutput, cg.Component)
+SetFrequencyAction = libretinypwm_ns.class_("SetFrequencyAction", automation.Action)
+
+CONFIG_SCHEMA = output.FLOAT_OUTPUT_SCHEMA.extend(
+    {
+        cv.Required(CONF_ID): cv.declare_id(LibreTinyPWM),
+        cv.Required(CONF_PIN): pins.internal_gpio_output_pin_schema,
+        cv.Optional(CONF_FREQUENCY, default="1kHz"): cv.frequency,
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    gpio = await cg.gpio_pin_expression(config[CONF_PIN])
+    var = cg.new_Pvariable(config[CONF_ID], gpio)
+    await cg.register_component(var, config)
+    await output.register_output(var, config)
+    cg.add(var.set_frequency(config[CONF_FREQUENCY]))
+
+
+@automation.register_action(
+    "output.libretiny_pwm.set_frequency",
+    SetFrequencyAction,
+    cv.Schema(
+        {
+            cv.Required(CONF_ID): cv.use_id(LibreTinyPWM),
+            cv.Required(CONF_FREQUENCY): cv.templatable(validate_frequency),
+        }
+    ),
+)
+async def libretiny_pwm_set_frequency_to_code(config, action_id, template_arg, args):
+    paren = await cg.get_variable(config[CONF_ID])
+    var = cg.new_Pvariable(action_id, template_arg, paren)
+    template_ = await cg.templatable(config[CONF_FREQUENCY], args, float)
+    cg.add(var.set_frequency(template_))
+    return var