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Add sn74hc165 input shift register (#4151)
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5 changed files with 229 additions and 0 deletions
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@ -208,6 +208,7 @@ esphome/components/sim800l/* @glmnet
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esphome/components/sm2135/* @BoukeHaarsma23
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esphome/components/sml/* @alengwenus
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esphome/components/smt100/* @piechade
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esphome/components/sn74hc165/* @jesserockz
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esphome/components/socket/* @esphome/core
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esphome/components/sonoff_d1/* @anatoly-savchenkov
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esphome/components/spi/* @esphome/core
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87
esphome/components/sn74hc165/__init__.py
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87
esphome/components/sn74hc165/__init__.py
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@ -0,0 +1,87 @@
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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 import pins
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from esphome.const import (
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CONF_ID,
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CONF_MODE,
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CONF_NUMBER,
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CONF_INVERTED,
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CONF_DATA_PIN,
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CONF_CLOCK_PIN,
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CONF_INPUT,
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)
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CODEOWNERS = ["@jesserockz"]
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DEPENDENCIES = []
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MULTI_CONF = True
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sn74hc165_ns = cg.esphome_ns.namespace("sn74hc165")
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SN74HC165Component = sn74hc165_ns.class_("SN74HC165Component", cg.Component)
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SN74HC165GPIOPin = sn74hc165_ns.class_(
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"SN74HC165GPIOPin", cg.GPIOPin, cg.Parented.template(SN74HC165Component)
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)
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CONF_SN74HC165 = "sn74hc165"
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CONF_LOAD_PIN = "load_pin"
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CONF_CLOCK_INHIBIT_PIN = "clock_inhibit_pin"
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CONF_SR_COUNT = "sr_count"
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CONFIG_SCHEMA = cv.Schema(
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{
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cv.Required(CONF_ID): cv.declare_id(SN74HC165Component),
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cv.Required(CONF_DATA_PIN): pins.gpio_input_pin_schema,
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cv.Required(CONF_CLOCK_PIN): pins.gpio_output_pin_schema,
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cv.Required(CONF_LOAD_PIN): pins.gpio_output_pin_schema,
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cv.Optional(CONF_CLOCK_INHIBIT_PIN): pins.gpio_output_pin_schema,
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cv.Optional(CONF_SR_COUNT, default=1): cv.int_range(min=1, max=256),
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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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data_pin = await cg.gpio_pin_expression(config[CONF_DATA_PIN])
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cg.add(var.set_data_pin(data_pin))
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clock_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_PIN])
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cg.add(var.set_clock_pin(clock_pin))
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load_pin = await cg.gpio_pin_expression(config[CONF_LOAD_PIN])
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cg.add(var.set_load_pin(load_pin))
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if CONF_CLOCK_INHIBIT_PIN in config:
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clock_inhibit_pin = await cg.gpio_pin_expression(config[CONF_CLOCK_INHIBIT_PIN])
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cg.add(var.set_clock_inhibit_pin(clock_inhibit_pin))
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cg.add(var.set_sr_count(config[CONF_SR_COUNT]))
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def _validate_input_mode(value):
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if value is not True:
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raise cv.Invalid("Only input mode is supported")
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return value
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SN74HC165_PIN_SCHEMA = cv.All(
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{
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cv.GenerateID(): cv.declare_id(SN74HC165GPIOPin),
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cv.Required(CONF_SN74HC165): cv.use_id(SN74HC165Component),
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cv.Required(CONF_NUMBER): cv.int_range(min=0, max=2048, max_included=False),
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cv.Optional(CONF_MODE, default={}): cv.All(
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{
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cv.Optional(CONF_INPUT, default=True): cv.All(
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cv.boolean, _validate_input_mode
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),
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},
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),
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cv.Optional(CONF_INVERTED, default=False): cv.boolean,
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}
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)
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@pins.PIN_SCHEMA_REGISTRY.register(CONF_SN74HC165, SN74HC165_PIN_SCHEMA)
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async def sn74hc165_pin_to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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await cg.register_parented(var, config[CONF_SN74HC165])
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cg.add(var.set_pin(config[CONF_NUMBER]))
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cg.add(var.set_inverted(config[CONF_INVERTED]))
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return var
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67
esphome/components/sn74hc165/sn74hc165.cpp
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67
esphome/components/sn74hc165/sn74hc165.cpp
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#include "sn74hc165.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace sn74hc165 {
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static const char *const TAG = "sn74hc165";
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void SN74HC165Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up SN74HC165...");
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// initialize pins
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this->clock_pin_->setup();
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this->data_pin_->setup();
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this->load_pin_->setup();
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this->clock_pin_->digital_write(false);
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this->load_pin_->digital_write(false);
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if (this->clock_inhibit_pin_ != nullptr) {
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this->clock_inhibit_pin_->setup();
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this->clock_inhibit_pin_->digital_write(true);
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}
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// read state from shift register
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this->read_gpio_();
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}
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void SN74HC165Component::loop() { this->read_gpio_(); }
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void SN74HC165Component::dump_config() { ESP_LOGCONFIG(TAG, "SN74HC165:"); }
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bool SN74HC165Component::digital_read_(uint16_t pin) {
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if (pin >= this->sr_count_ * 8) {
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ESP_LOGE(TAG, "Pin %u is out of range! Maximum pin number with %u chips in series is %u", pin, this->sr_count_,
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(this->sr_count_ * 8) - 1);
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return false;
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}
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return this->input_bits_[pin];
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}
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void SN74HC165Component::read_gpio_() {
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this->load_pin_->digital_write(false);
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delayMicroseconds(5);
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this->load_pin_->digital_write(true);
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delayMicroseconds(5);
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if (this->clock_inhibit_pin_ != nullptr)
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this->clock_inhibit_pin_->digital_write(false);
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for (int16_t i = (this->sr_count_ * 8) - 1; i >= 0; i--) {
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this->input_bits_[i] = this->data_pin_->digital_read();
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this->clock_pin_->digital_write(true);
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this->clock_pin_->digital_write(false);
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}
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if (this->clock_inhibit_pin_ != nullptr)
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this->clock_inhibit_pin_->digital_write(true);
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}
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float SN74HC165Component::get_setup_priority() const { return setup_priority::IO; }
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bool SN74HC165GPIOPin::digital_read() { return this->parent_->digital_read_(this->pin_); }
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std::string SN74HC165GPIOPin::dump_summary() const { return str_snprintf("%u via SN74HC165", 18, pin_); }
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} // namespace sn74hc165
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} // namespace esphome
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61
esphome/components/sn74hc165/sn74hc165.h
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61
esphome/components/sn74hc165/sn74hc165.h
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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/core/helpers.h"
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#include <vector>
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namespace esphome {
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namespace sn74hc165 {
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class SN74HC165Component : public Component {
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public:
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SN74HC165Component() = default;
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void setup() override;
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void loop() override;
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float get_setup_priority() const override;
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void dump_config() override;
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void set_data_pin(GPIOPin *pin) { this->data_pin_ = pin; }
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void set_clock_pin(GPIOPin *pin) { this->clock_pin_ = pin; }
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void set_load_pin(GPIOPin *pin) { this->load_pin_ = pin; }
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void set_clock_inhibit_pin(GPIOPin *pin) { this->clock_inhibit_pin_ = pin; }
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void set_sr_count(uint8_t count) {
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this->sr_count_ = count;
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this->input_bits_.resize(count * 8);
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}
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protected:
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friend class SN74HC165GPIOPin;
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bool digital_read_(uint16_t pin);
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void read_gpio_();
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GPIOPin *data_pin_;
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GPIOPin *clock_pin_;
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GPIOPin *load_pin_;
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GPIOPin *clock_inhibit_pin_;
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uint8_t sr_count_;
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std::vector<bool> input_bits_;
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};
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/// Helper class to expose a SC74HC165 pin as an internal input GPIO pin.
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class SN74HC165GPIOPin : public GPIOPin, public Parented<SN74HC165Component> {
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public:
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void setup() override {}
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void pin_mode(gpio::Flags flags) override {}
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bool digital_read() override;
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void digital_write(bool value) override{};
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std::string dump_summary() const override;
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void set_pin(uint16_t pin) { pin_ = pin; }
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void set_inverted(bool inverted) { inverted_ = inverted; }
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protected:
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uint16_t pin_;
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bool inverted_;
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};
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} // namespace sn74hc165
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} // namespace esphome
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@ -162,6 +162,11 @@ binary_sensor:
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then:
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- output.turn_off: Led7
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- platform: gpio
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id: sn74hc165_pin_0
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pin:
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sn74hc165: sn74hc165_hub
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number: 0
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@ -542,3 +547,11 @@ text_sensor:
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- ezo_pmp.arbitrary_command:
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id: hcl_pump
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command: D,?
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sn74hc165:
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id: sn74hc165_hub
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data_pin: GPIO12
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clock_pin: GPIO14
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load_pin: GPIO27
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clock_inhibit_pin: GPIO26
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sr_count: 4
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