Initial Support for RP2040 platform (#3284)

Co-authored-by: Paulus Schoutsen <balloob@gmail.com>

esphome/components/rp2040_pwm/output.py

@@ -0,0 +1,55 @@
+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,
+)
+
+CODEOWNERS = ["@jesserockz"]
+DEPENDENCIES = ["rp2040"]
+
+
+rp2040_pwm_ns = cg.esphome_ns.namespace("rp2040_pwm")
+RP2040PWM = rp2040_pwm_ns.class_("RP2040PWM", output.FloatOutput, cg.Component)
+SetFrequencyAction = rp2040_pwm_ns.class_("SetFrequencyAction", automation.Action)
+validate_frequency = cv.All(cv.frequency, cv.Range(min=1.0e-6))
+
+CONFIG_SCHEMA = output.FLOAT_OUTPUT_SCHEMA.extend(
+    {
+        cv.Required(CONF_ID): cv.declare_id(RP2040PWM),
+        cv.Required(CONF_PIN): pins.internal_gpio_output_pin_schema,
+        cv.Optional(CONF_FREQUENCY, default="1kHz"): validate_frequency,
+    }
+).extend(cv.COMPONENT_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_ID])
+    await cg.register_component(var, config)
+    await output.register_output(var, config)
+
+    pin = await cg.gpio_pin_expression(config[CONF_PIN])
+    cg.add(var.set_pin(pin))
+
+    cg.add(var.set_frequency(config[CONF_FREQUENCY]))
+
+
+@automation.register_action(
+    "output.rp2040_pwm.set_frequency",
+    SetFrequencyAction,
+    cv.Schema(
+        {
+            cv.Required(CONF_ID): cv.use_id(RP2040PWM),
+            cv.Required(CONF_FREQUENCY): cv.templatable(validate_frequency),
+        }
+    ),
+)
+async def rp2040_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

esphome/components/rp2040_pwm/rp2040_pwm.cpp

@@ -0,0 +1,45 @@
+#ifdef USE_RP2040
+
+#include "rp2040_pwm.h"
+#include "esphome/core/defines.h"
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+#include "esphome/core/macros.h"
+
+#include <PinNames.h>
+
+namespace esphome {
+namespace rp2040_pwm {
+
+static const char *const TAG = "rp2040_pwm";
+
+void RP2040PWM::setup() {
+  ESP_LOGCONFIG(TAG, "Setting up RP2040 PWM Output...");
+  this->pin_->setup();
+  this->pwm_ = new mbed::PwmOut((PinName) this->pin_->get_pin());
+  this->turn_off();
+}
+void RP2040PWM::dump_config() {
+  ESP_LOGCONFIG(TAG, "RP2040 PWM:");
+  LOG_PIN("  Pin: ", this->pin_);
+  ESP_LOGCONFIG(TAG, "  Frequency: %.1f Hz", this->frequency_);
+  LOG_FLOAT_OUTPUT(this);
+}
+void HOT RP2040PWM::write_state(float state) {
+  this->last_output_ = state;
+
+  // Also check pin inversion
+  if (this->pin_->is_inverted()) {
+    state = 1.0f - state;
+  }
+
+  auto total_time_us = static_cast<uint32_t>(roundf(1e6f / this->frequency_));
+
+  this->pwm_->period_us(total_time_us);
+  this->pwm_->write(state);
+}
+
+}  // namespace rp2040_pwm
+}  // namespace esphome
+
+#endif

esphome/components/rp2040_pwm/rp2040_pwm.h

@@ -0,0 +1,57 @@
+#pragma once
+
+#ifdef USE_RP2040
+
+#include "esphome/components/output/float_output.h"
+#include "esphome/core/automation.h"
+#include "esphome/core/component.h"
+#include "esphome/core/hal.h"
+
+#include "drivers/PwmOut.h"
+
+namespace esphome {
+namespace rp2040_pwm {
+
+class RP2040PWM : public output::FloatOutput, public Component {
+ public:
+  void set_pin(InternalGPIOPin *pin) { pin_ = pin; }
+  void set_frequency(float frequency) { this->frequency_ = frequency; }
+  /// Dynamically update frequency
+  void update_frequency(float frequency) override {
+    this->set_frequency(frequency);
+    this->write_state(this->last_output_);
+  }
+
+  /// Initialize pin
+  void setup() override;
+  void dump_config() override;
+  /// HARDWARE setup_priority
+  float get_setup_priority() const override { return setup_priority::HARDWARE; }
+
+ protected:
+  void write_state(float state) override;
+
+  InternalGPIOPin *pin_;
+  mbed::PwmOut *pwm_;
+  float frequency_{1000.0};
+  /// Cache last output level for dynamic frequency updating
+  float last_output_{0.0};
+};
+
+template<typename... Ts> class SetFrequencyAction : public Action<Ts...> {
+ public:
+  SetFrequencyAction(RP2040PWM *parent) : parent_(parent) {}
+  TEMPLATABLE_VALUE(float, frequency);
+
+  void play(Ts... x) {
+    float freq = this->frequency_.value(x...);
+    this->parent_->update_frequency(freq);
+  }
+
+  RP2040PWM *parent_;
+};
+
+}  // namespace rp2040_pwm
+}  // namespace esphome
+
+#endif  // USE_RP2040