refactor mcp4728 component (#5609)

Co-authored-by: Samuel Sieb <samuel@sieb.net>

esphome/components/mcp4728/output/__init__.py

@@ -0,0 +1,62 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.components import output
+from esphome.const import CONF_CHANNEL, CONF_ID, CONF_GAIN
+from .. import MCP4728Component, CONF_MCP4728_ID, mcp4728_ns
+
+DEPENDENCIES = ["mcp4728"]
+
+MCP4728Channel = mcp4728_ns.class_("MCP4728Channel", output.FloatOutput)
+CONF_VREF = "vref"
+CONF_POWER_DOWN = "power_down"
+
+MCP4728Vref = mcp4728_ns.enum("MCP4728Vref")
+VREF_OPTIONS = {
+    "vdd": MCP4728Vref.MCP4728_VREF_VDD,
+    "internal": MCP4728Vref.MCP4728_VREF_INTERNAL_2_8V,
+}
+
+MCP4728Gain = mcp4728_ns.enum("MCP4728Gain")
+GAIN_OPTIONS = {"X1": MCP4728Gain.MCP4728_GAIN_X1, "X2": MCP4728Gain.MCP4728_GAIN_X2}
+
+MCP4728PwrDown = mcp4728_ns.enum("MCP4728PwrDown")
+PWRDOWN_OPTIONS = {
+    "normal": MCP4728PwrDown.MCP4728_PD_NORMAL,
+    "gnd_1k": MCP4728PwrDown.MCP4728_PD_GND_1KOHM,
+    "gnd_100k": MCP4728PwrDown.MCP4728_PD_GND_100KOHM,
+    "gnd_500k": MCP4728PwrDown.MCP4728_PD_GND_500KOHM,
+}
+
+MCP4728ChannelIdx = mcp4728_ns.enum("MCP4728ChannelIdx")
+CHANNEL_OPTIONS = {
+    "A": MCP4728ChannelIdx.MCP4728_CHANNEL_A,
+    "B": MCP4728ChannelIdx.MCP4728_CHANNEL_B,
+    "C": MCP4728ChannelIdx.MCP4728_CHANNEL_C,
+    "D": MCP4728ChannelIdx.MCP4728_CHANNEL_D,
+}
+
+CONFIG_SCHEMA = output.FLOAT_OUTPUT_SCHEMA.extend(
+    {
+        cv.Required(CONF_ID): cv.declare_id(MCP4728Channel),
+        cv.GenerateID(CONF_MCP4728_ID): cv.use_id(MCP4728Component),
+        cv.Required(CONF_CHANNEL): cv.enum(CHANNEL_OPTIONS, upper=True),
+        cv.Optional(CONF_VREF, default="vdd"): cv.enum(VREF_OPTIONS, upper=False),
+        cv.Optional(CONF_POWER_DOWN, default="normal"): cv.enum(
+            PWRDOWN_OPTIONS, upper=False
+        ),
+        cv.Optional(CONF_GAIN, default="X1"): cv.enum(GAIN_OPTIONS, upper=True),
+    }
+)
+
+
+async def to_code(config):
+    paren = await cg.get_variable(config[CONF_MCP4728_ID])
+    var = cg.new_Pvariable(
+        config[CONF_ID],
+        paren,
+        config[CONF_CHANNEL],
+        config[CONF_VREF],
+        config[CONF_GAIN],
+        config[CONF_POWER_DOWN],
+    )
+    await output.register_output(var, config)

esphome/components/mcp4728/output/mcp4728_output.cpp

@@ -0,0 +1,17 @@
+#include "mcp4728_output.h"
+
+#include "esphome/core/helpers.h"
+#include "esphome/core/log.h"
+
+namespace esphome {
+namespace mcp4728 {
+
+void MCP4728Channel::write_state(float state) {
+  const uint16_t max_duty = 4095;
+  const float duty_rounded = roundf(state * max_duty);
+  auto duty = static_cast<uint16_t>(duty_rounded);
+  this->parent_->set_channel_value_(this->channel_, duty);
+}
+
+}  // namespace mcp4728
+}  // namespace esphome

esphome/components/mcp4728/output/mcp4728_output.h

@@ -0,0 +1,32 @@
+#pragma once
+
+#include "../mcp4728.h"
+#include "esphome/core/component.h"
+#include "esphome/components/output/float_output.h"
+#include "esphome/components/i2c/i2c.h"
+
+namespace esphome {
+namespace mcp4728 {
+
+class MCP4728Channel : public output::FloatOutput {
+ public:
+  MCP4728Channel(MCP4728Component *parent, MCP4728ChannelIdx channel, MCP4728Vref vref, MCP4728Gain gain,
+                 MCP4728PwrDown pwrdown)
+      : parent_(parent), channel_(channel) {
+    // update VREF
+    parent->select_vref_(channel, vref);
+    // update PD
+    parent->select_power_down_(channel, pwrdown);
+    // update GAIN
+    parent->select_gain_(channel, gain);
+  }
+
+ protected:
+  void write_state(float state) override;
+
+  MCP4728Component *parent_;
+  MCP4728ChannelIdx channel_;
+};
+
+}  // namespace mcp4728
+}  // namespace esphome