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Add cd74hc4067 multiplexer (#2431)
Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com> Co-authored-by: asoehlke <git@soehlke.de>
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6 changed files with 270 additions and 0 deletions
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@ -37,6 +37,7 @@ esphome/components/canbus/* @danielschramm @mvturnho
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esphome/components/cap1188/* @MrEditor97
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esphome/components/captive_portal/* @OttoWinter
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esphome/components/ccs811/* @habbie
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esphome/components/cd74hc4067/* @asoehlke
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esphome/components/climate/* @esphome/core
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esphome/components/climate_ir/* @glmnet
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esphome/components/color_temperature/* @jesserockz
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53
esphome/components/cd74hc4067/__init__.py
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53
esphome/components/cd74hc4067/__init__.py
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@ -0,0 +1,53 @@
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import esphome.codegen as cg
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from esphome import pins
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import esphome.config_validation as cv
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from esphome.const import (
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CONF_DELAY,
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CONF_ID,
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)
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CODEOWNERS = ["@asoehlke"]
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AUTO_LOAD = ["sensor", "voltage_sampler"]
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cd74hc4067_ns = cg.esphome_ns.namespace("cd74hc4067")
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CD74HC4067Component = cd74hc4067_ns.class_(
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"CD74HC4067Component", cg.Component, cg.PollingComponent
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)
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CONF_PIN_S0 = "pin_s0"
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CONF_PIN_S1 = "pin_s1"
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CONF_PIN_S2 = "pin_s2"
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CONF_PIN_S3 = "pin_s3"
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DEFAULT_DELAY = "2ms"
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CONFIG_SCHEMA = cv.Schema(
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{
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cv.GenerateID(): cv.declare_id(CD74HC4067Component),
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cv.Required(CONF_PIN_S0): pins.internal_gpio_output_pin_schema,
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cv.Required(CONF_PIN_S1): pins.internal_gpio_output_pin_schema,
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cv.Required(CONF_PIN_S2): pins.internal_gpio_output_pin_schema,
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cv.Required(CONF_PIN_S3): pins.internal_gpio_output_pin_schema,
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cv.Optional(
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CONF_DELAY, default=DEFAULT_DELAY
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): cv.positive_time_period_milliseconds,
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}
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).extend(cv.COMPONENT_SCHEMA)
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async def to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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await cg.register_component(var, config)
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pin_s0 = await cg.gpio_pin_expression(config[CONF_PIN_S0])
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cg.add(var.set_pin_s0(pin_s0))
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pin_s1 = await cg.gpio_pin_expression(config[CONF_PIN_S1])
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cg.add(var.set_pin_s1(pin_s1))
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pin_s2 = await cg.gpio_pin_expression(config[CONF_PIN_S2])
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cg.add(var.set_pin_s2(pin_s2))
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pin_s3 = await cg.gpio_pin_expression(config[CONF_PIN_S3])
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cg.add(var.set_pin_s3(pin_s3))
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cg.add(var.set_switch_delay(config[CONF_DELAY]))
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86
esphome/components/cd74hc4067/cd74hc4067.cpp
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86
esphome/components/cd74hc4067/cd74hc4067.cpp
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@ -0,0 +1,86 @@
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#include "cd74hc4067.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace cd74hc4067 {
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static const char *const TAG = "cd74hc4067";
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float CD74HC4067Component::get_setup_priority() const { return setup_priority::DATA; }
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void CD74HC4067Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up CD74HC4067...");
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this->pin_s0_->setup();
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this->pin_s1_->setup();
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this->pin_s2_->setup();
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this->pin_s3_->setup();
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// set other pin, so that activate_pin will really switch
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this->active_pin_ = 1;
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this->activate_pin(0);
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}
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void CD74HC4067Component::dump_config() {
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ESP_LOGCONFIG(TAG, "CD74HC4067 Multiplexer:");
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LOG_PIN(" S0 Pin: ", this->pin_s0_);
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LOG_PIN(" S1 Pin: ", this->pin_s1_);
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LOG_PIN(" S2 Pin: ", this->pin_s2_);
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LOG_PIN(" S3 Pin: ", this->pin_s3_);
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ESP_LOGCONFIG(TAG, "switch delay: %d", this->switch_delay_);
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}
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void CD74HC4067Component::activate_pin(uint8_t pin) {
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if (this->active_pin_ != pin) {
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ESP_LOGD(TAG, "switch to input %d", pin);
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static int mux_channel[16][4] = {
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{0, 0, 0, 0}, // channel 0
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{1, 0, 0, 0}, // channel 1
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{0, 1, 0, 0}, // channel 2
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{1, 1, 0, 0}, // channel 3
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{0, 0, 1, 0}, // channel 4
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{1, 0, 1, 0}, // channel 5
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{0, 1, 1, 0}, // channel 6
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{1, 1, 1, 0}, // channel 7
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{0, 0, 0, 1}, // channel 8
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{1, 0, 0, 1}, // channel 9
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{0, 1, 0, 1}, // channel 10
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{1, 1, 0, 1}, // channel 11
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{0, 0, 1, 1}, // channel 12
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{1, 0, 1, 1}, // channel 13
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{0, 1, 1, 1}, // channel 14
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{1, 1, 1, 1} // channel 15
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};
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this->pin_s0_->digital_write(mux_channel[pin][0]);
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this->pin_s1_->digital_write(mux_channel[pin][1]);
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this->pin_s2_->digital_write(mux_channel[pin][2]);
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this->pin_s3_->digital_write(mux_channel[pin][3]);
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// small delay is needed to let the multiplexer switch
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delay(this->switch_delay_);
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this->active_pin_ = pin;
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}
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}
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CD74HC4067Sensor::CD74HC4067Sensor(CD74HC4067Component *parent) : parent_(parent) {}
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void CD74HC4067Sensor::update() {
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float value_v = this->sample();
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this->publish_state(value_v);
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}
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float CD74HC4067Sensor::get_setup_priority() const { return this->parent_->get_setup_priority() - 1.0f; }
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float CD74HC4067Sensor::sample() {
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this->parent_->activate_pin(this->pin_);
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return this->source_->sample();
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}
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void CD74HC4067Sensor::dump_config() {
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LOG_SENSOR(TAG, "CD74HC4067 Sensor", this);
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ESP_LOGCONFIG(TAG, " Pin: %u", this->pin_);
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LOG_UPDATE_INTERVAL(this);
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}
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} // namespace cd74hc4067
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} // namespace esphome
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65
esphome/components/cd74hc4067/cd74hc4067.h
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65
esphome/components/cd74hc4067/cd74hc4067.h
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@ -0,0 +1,65 @@
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#pragma once
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#include "esphome/core/component.h"
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#include "esphome/core/hal.h"
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#include "esphome/components/sensor/sensor.h"
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#include "esphome/components/voltage_sampler/voltage_sampler.h"
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namespace esphome {
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namespace cd74hc4067 {
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class CD74HC4067Component : public Component {
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public:
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/// Set up the internal sensor array.
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void setup() override;
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void dump_config() override;
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float get_setup_priority() const override;
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/// setting pin active by setting the right combination of the four multiplexer input pins
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void activate_pin(uint8_t pin);
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/// set the pin connected to multiplexer control pin 0
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void set_pin_s0(InternalGPIOPin *pin) { this->pin_s0_ = pin; }
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/// set the pin connected to multiplexer control pin 1
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void set_pin_s1(InternalGPIOPin *pin) { this->pin_s1_ = pin; }
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/// set the pin connected to multiplexer control pin 2
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void set_pin_s2(InternalGPIOPin *pin) { this->pin_s2_ = pin; }
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/// set the pin connected to multiplexer control pin 3
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void set_pin_s3(InternalGPIOPin *pin) { this->pin_s3_ = pin; }
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/// set the delay needed after an input switch
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void set_switch_delay(uint32_t switch_delay) { this->switch_delay_ = switch_delay; }
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private:
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InternalGPIOPin *pin_s0_;
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InternalGPIOPin *pin_s1_;
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InternalGPIOPin *pin_s2_;
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InternalGPIOPin *pin_s3_;
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/// the currently active pin
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uint8_t active_pin_;
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uint32_t switch_delay_;
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};
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class CD74HC4067Sensor : public sensor::Sensor, public PollingComponent, public voltage_sampler::VoltageSampler {
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public:
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CD74HC4067Sensor(CD74HC4067Component *parent);
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void update() override;
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void dump_config() override;
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/// `HARDWARE_LATE` setup priority.
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float get_setup_priority() const override;
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void set_pin(uint8_t pin) { this->pin_ = pin; }
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void set_source(voltage_sampler::VoltageSampler *source) { this->source_ = source; }
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float sample() override;
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protected:
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CD74HC4067Component *parent_;
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/// The sampling source to read values from.
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voltage_sampler::VoltageSampler *source_;
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uint8_t pin_;
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};
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} // namespace cd74hc4067
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} // namespace esphome
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55
esphome/components/cd74hc4067/sensor.py
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55
esphome/components/cd74hc4067/sensor.py
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import esphome.codegen as cg
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import esphome.config_validation as cv
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from esphome.components import sensor, voltage_sampler
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from esphome.const import (
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CONF_ID,
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CONF_SENSOR,
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CONF_NUMBER,
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ICON_FLASH,
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UNIT_VOLT,
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STATE_CLASS_MEASUREMENT,
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DEVICE_CLASS_VOLTAGE,
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)
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from . import cd74hc4067_ns, CD74HC4067Component
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DEPENDENCIES = ["cd74hc4067"]
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CD74HC4067Sensor = cd74hc4067_ns.class_(
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"CD74HC4067Sensor",
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sensor.Sensor,
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cg.PollingComponent,
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voltage_sampler.VoltageSampler,
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)
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CONF_CD74HC4067_ID = "cd74hc4067_id"
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CONFIG_SCHEMA = (
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sensor.sensor_schema(
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unit_of_measurement=UNIT_VOLT,
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accuracy_decimals=3,
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device_class=DEVICE_CLASS_VOLTAGE,
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state_class=STATE_CLASS_MEASUREMENT,
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icon=ICON_FLASH,
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)
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.extend(
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{
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cv.GenerateID(): cv.declare_id(CD74HC4067Sensor),
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cv.GenerateID(CONF_CD74HC4067_ID): cv.use_id(CD74HC4067Component),
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cv.Required(CONF_NUMBER): cv.int_range(0, 15),
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cv.Required(CONF_SENSOR): cv.use_id(voltage_sampler.VoltageSampler),
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}
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)
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.extend(cv.polling_component_schema("60s"))
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)
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async def to_code(config):
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parent = await cg.get_variable(config[CONF_CD74HC4067_ID])
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var = cg.new_Pvariable(config[CONF_ID], parent)
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await cg.register_component(var, config)
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await sensor.register_sensor(var, config)
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cg.add(var.set_pin(config[CONF_NUMBER]))
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sens = await cg.get_variable(config[CONF_SENSOR])
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cg.add(var.set_source(sens))
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@ -378,6 +378,10 @@ sensor:
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- 400 -> 500
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- -50 -> -1000
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- -100 -> -10000
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- platform: cd74hc4067
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id: cd74hc4067_0
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number: 0
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sensor: my_sensor
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- platform: resistance
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sensor: my_sensor
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configuration: DOWNSTREAM
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@ -1345,3 +1349,9 @@ dsmr:
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daly_bms:
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update_interval: 20s
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uart_id: uart1
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cd74hc4067:
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pin_s0: GPIO12
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pin_s1: GPIO13
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pin_s2: GPIO14
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pin_s3: GPIO15
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