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Add Pca9554 component (#4192)
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5 changed files with 272 additions and 0 deletions
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@ -164,6 +164,7 @@ esphome/components/nfc/* @jesserockz
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esphome/components/number/* @esphome/core
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esphome/components/ota/* @esphome/core
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esphome/components/output/* @esphome/core
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esphome/components/pca9554/* @hwstar
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esphome/components/pid/* @OttoWinter
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esphome/components/pipsolar/* @andreashergert1984
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esphome/components/pm1006/* @habbie
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76
esphome/components/pca9554/__init__.py
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76
esphome/components/pca9554/__init__.py
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@ -0,0 +1,76 @@
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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.components import i2c
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from esphome.const import (
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CONF_ID,
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CONF_INPUT,
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CONF_NUMBER,
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CONF_MODE,
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CONF_INVERTED,
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CONF_OUTPUT,
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)
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CODEOWNERS = ["@hwstar"]
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DEPENDENCIES = ["i2c"]
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MULTI_CONF = True
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pca9554_ns = cg.esphome_ns.namespace("pca9554")
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PCA9554Component = pca9554_ns.class_("PCA9554Component", cg.Component, i2c.I2CDevice)
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PCA9554GPIOPin = pca9554_ns.class_(
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"PCA9554GPIOPin", cg.GPIOPin, cg.Parented.template(PCA9554Component)
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)
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CONF_PCA9554 = "pca9554"
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CONFIG_SCHEMA = (
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cv.Schema({cv.Required(CONF_ID): cv.declare_id(PCA9554Component)})
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.extend(cv.COMPONENT_SCHEMA)
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.extend(
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i2c.i2c_device_schema(0x20)
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) # Note: 0x20 for the non-A part. The PCA9554A parts start at addess 0x38
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)
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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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await i2c.register_i2c_device(var, config)
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def validate_mode(value):
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if not (value[CONF_INPUT] or value[CONF_OUTPUT]):
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raise cv.Invalid("Mode must be either input or output")
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if value[CONF_INPUT] and value[CONF_OUTPUT]:
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raise cv.Invalid("Mode must be either input or output")
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return value
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PCA9554_PIN_SCHEMA = cv.All(
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{
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cv.GenerateID(): cv.declare_id(PCA9554GPIOPin),
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cv.Required(CONF_PCA9554): cv.use_id(PCA9554Component),
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cv.Required(CONF_NUMBER): cv.int_range(min=0, max=8),
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cv.Optional(CONF_MODE, default={}): cv.All(
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{
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cv.Optional(CONF_INPUT, default=False): cv.boolean,
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cv.Optional(CONF_OUTPUT, default=False): cv.boolean,
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},
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validate_mode,
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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("pca9554", PCA9554_PIN_SCHEMA)
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async def pca9554_pin_to_code(config):
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var = cg.new_Pvariable(config[CONF_ID])
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parent = await cg.get_variable(config[CONF_PCA9554])
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cg.add(var.set_parent(parent))
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num = config[CONF_NUMBER]
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cg.add(var.set_pin(num))
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cg.add(var.set_inverted(config[CONF_INVERTED]))
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cg.add(var.set_flags(pins.gpio_flags_expr(config[CONF_MODE])))
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return var
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112
esphome/components/pca9554/pca9554.cpp
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112
esphome/components/pca9554/pca9554.cpp
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@ -0,0 +1,112 @@
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#include "pca9554.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace pca9554 {
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const uint8_t INPUT_REG = 0;
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const uint8_t OUTPUT_REG = 1;
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const uint8_t INVERT_REG = 2;
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const uint8_t CONFIG_REG = 3;
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static const char *const TAG = "pca9554";
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void PCA9554Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up PCA9554/PCA9554A...");
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// Test to see if device exists
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if (!this->read_inputs_()) {
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ESP_LOGE(TAG, "PCA9554 not available under 0x%02X", this->address_);
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this->mark_failed();
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return;
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}
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// No polarity inversion
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this->write_register_(INVERT_REG, 0);
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// All inputs at initialization
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this->config_mask_ = 0;
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// Invert mask as the part sees a 1 as an input
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this->write_register_(CONFIG_REG, ~this->config_mask_);
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// All ouputs low
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this->output_mask_ = 0;
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this->write_register_(OUTPUT_REG, this->output_mask_);
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// Read the inputs
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this->read_inputs_();
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ESP_LOGD(TAG, "Initialization complete. Warning: %d, Error: %d", this->status_has_warning(),
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this->status_has_error());
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}
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void PCA9554Component::dump_config() {
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ESP_LOGCONFIG(TAG, "PCA9554:");
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LOG_I2C_DEVICE(this)
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if (this->is_failed()) {
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ESP_LOGE(TAG, "Communication with PCA9554 failed!");
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}
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}
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bool PCA9554Component::digital_read(uint8_t pin) {
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this->read_inputs_();
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return this->input_mask_ & (1 << pin);
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}
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void PCA9554Component::digital_write(uint8_t pin, bool value) {
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if (value) {
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this->output_mask_ |= (1 << pin);
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} else {
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this->output_mask_ &= ~(1 << pin);
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}
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this->write_register_(OUTPUT_REG, this->output_mask_);
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}
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void PCA9554Component::pin_mode(uint8_t pin, gpio::Flags flags) {
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if (flags == gpio::FLAG_INPUT) {
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// Clear mode mask bit
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this->config_mask_ &= ~(1 << pin);
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} else if (flags == gpio::FLAG_OUTPUT) {
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// Set mode mask bit
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this->config_mask_ |= 1 << pin;
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}
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this->write_register_(CONFIG_REG, ~this->config_mask_);
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}
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bool PCA9554Component::read_inputs_() {
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uint8_t inputs;
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if (this->is_failed()) {
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ESP_LOGD(TAG, "Device marked failed");
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return false;
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}
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if ((this->last_error_ = this->read_register(INPUT_REG, &inputs, 1, true)) != esphome::i2c::ERROR_OK) {
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this->status_set_warning();
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ESP_LOGE(TAG, "read_register_(): I2C I/O error: %d", (int) this->last_error_);
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return false;
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}
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this->status_clear_warning();
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this->input_mask_ = inputs;
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return true;
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}
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bool PCA9554Component::write_register_(uint8_t reg, uint8_t value) {
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if ((this->last_error_ = this->write_register(reg, &value, 1, true)) != esphome::i2c::ERROR_OK) {
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this->status_set_warning();
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ESP_LOGE(TAG, "write_register_(): I2C I/O error: %d", (int) this->last_error_);
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return false;
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}
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this->status_clear_warning();
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return true;
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}
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float PCA9554Component::get_setup_priority() const { return setup_priority::IO; }
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void PCA9554GPIOPin::setup() { pin_mode(flags_); }
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void PCA9554GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
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bool PCA9554GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
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void PCA9554GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
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std::string PCA9554GPIOPin::dump_summary() const {
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char buffer[32];
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snprintf(buffer, sizeof(buffer), "%u via PCA9554", pin_);
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return buffer;
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}
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} // namespace pca9554
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} // namespace esphome
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64
esphome/components/pca9554/pca9554.h
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64
esphome/components/pca9554/pca9554.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/components/i2c/i2c.h"
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namespace esphome {
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namespace pca9554 {
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class PCA9554Component : public Component, public i2c::I2CDevice {
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public:
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PCA9554Component() = default;
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/// Check i2c availability and setup masks
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void setup() override;
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/// Helper function to read the value of a pin.
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bool digital_read(uint8_t pin);
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/// Helper function to write the value of a pin.
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void digital_write(uint8_t pin, bool value);
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/// Helper function to set the pin mode of a pin.
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void pin_mode(uint8_t pin, gpio::Flags flags);
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float get_setup_priority() const override;
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void dump_config() override;
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protected:
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bool read_inputs_();
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bool write_register_(uint8_t reg, uint8_t value);
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/// Mask for the pin config - 1 means OUTPUT, 0 means INPUT
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uint8_t config_mask_{0x00};
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/// The mask to write as output state - 1 means HIGH, 0 means LOW
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uint8_t output_mask_{0x00};
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/// The state of the actual input pin states - 1 means HIGH, 0 means LOW
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uint8_t input_mask_{0x00};
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/// Storage for last I2C error seen
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esphome::i2c::ErrorCode last_error_;
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};
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/// Helper class to expose a PCA9554 pin as an internal input GPIO pin.
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class PCA9554GPIOPin : public GPIOPin {
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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_parent(PCA9554Component *parent) { parent_ = parent; }
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void set_pin(uint8_t pin) { pin_ = pin; }
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void set_inverted(bool inverted) { inverted_ = inverted; }
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void set_flags(gpio::Flags flags) { flags_ = flags; }
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protected:
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PCA9554Component *parent_;
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uint8_t pin_;
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bool inverted_;
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gpio::Flags flags_;
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};
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} // namespace pca9554
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} // namespace esphome
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@ -1341,6 +1341,13 @@ binary_sensor:
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number: 1
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mode: INPUT
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inverted: true
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- platform: gpio
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name: PCA9554 binary sensor
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pin:
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pca9554: pca9554_hub
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number: 1
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mode: INPUT
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inverted: true
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- platform: gpio
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name: MCP21 binary sensor
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pin:
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@ -1537,6 +1544,13 @@ output:
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number: 0
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mode: OUTPUT
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inverted: false
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- platform: gpio
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id: id26
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pin:
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pca9554: pca9554_hub
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number: 0
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mode: OUTPUT
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inverted: false
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- platform: gpio
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id: id22
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pin:
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@ -2716,6 +2730,11 @@ pcf8574:
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pcf8575: false
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i2c_id: i2c_bus
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pca9554:
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- id: pca9554_hub
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address: 0x3F
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i2c_id: i2c_bus
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mcp23017:
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- id: mcp23017_hub
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open_drain_interrupt: true
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