mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 11:44:13 +01:00
112 lines
3.3 KiB
C++
112 lines
3.3 KiB
C++
#include "pca9554.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
namespace esphome {
|
|
namespace pca9554 {
|
|
|
|
const uint8_t INPUT_REG = 0;
|
|
const uint8_t OUTPUT_REG = 1;
|
|
const uint8_t INVERT_REG = 2;
|
|
const uint8_t CONFIG_REG = 3;
|
|
|
|
static const char *const TAG = "pca9554";
|
|
|
|
void PCA9554Component::setup() {
|
|
ESP_LOGCONFIG(TAG, "Setting up PCA9554/PCA9554A...");
|
|
// Test to see if device exists
|
|
if (!this->read_inputs_()) {
|
|
ESP_LOGE(TAG, "PCA9554 not available under 0x%02X", this->address_);
|
|
this->mark_failed();
|
|
return;
|
|
}
|
|
|
|
// No polarity inversion
|
|
this->write_register_(INVERT_REG, 0);
|
|
// All inputs at initialization
|
|
this->config_mask_ = 0;
|
|
// Invert mask as the part sees a 1 as an input
|
|
this->write_register_(CONFIG_REG, ~this->config_mask_);
|
|
// All ouputs low
|
|
this->output_mask_ = 0;
|
|
this->write_register_(OUTPUT_REG, this->output_mask_);
|
|
// Read the inputs
|
|
this->read_inputs_();
|
|
ESP_LOGD(TAG, "Initialization complete. Warning: %d, Error: %d", this->status_has_warning(),
|
|
this->status_has_error());
|
|
}
|
|
void PCA9554Component::dump_config() {
|
|
ESP_LOGCONFIG(TAG, "PCA9554:");
|
|
LOG_I2C_DEVICE(this)
|
|
if (this->is_failed()) {
|
|
ESP_LOGE(TAG, "Communication with PCA9554 failed!");
|
|
}
|
|
}
|
|
|
|
bool PCA9554Component::digital_read(uint8_t pin) {
|
|
this->read_inputs_();
|
|
return this->input_mask_ & (1 << pin);
|
|
}
|
|
|
|
void PCA9554Component::digital_write(uint8_t pin, bool value) {
|
|
if (value) {
|
|
this->output_mask_ |= (1 << pin);
|
|
} else {
|
|
this->output_mask_ &= ~(1 << pin);
|
|
}
|
|
this->write_register_(OUTPUT_REG, this->output_mask_);
|
|
}
|
|
|
|
void PCA9554Component::pin_mode(uint8_t pin, gpio::Flags flags) {
|
|
if (flags == gpio::FLAG_INPUT) {
|
|
// Clear mode mask bit
|
|
this->config_mask_ &= ~(1 << pin);
|
|
} else if (flags == gpio::FLAG_OUTPUT) {
|
|
// Set mode mask bit
|
|
this->config_mask_ |= 1 << pin;
|
|
}
|
|
this->write_register_(CONFIG_REG, ~this->config_mask_);
|
|
}
|
|
|
|
bool PCA9554Component::read_inputs_() {
|
|
uint8_t inputs;
|
|
|
|
if (this->is_failed()) {
|
|
ESP_LOGD(TAG, "Device marked failed");
|
|
return false;
|
|
}
|
|
|
|
if ((this->last_error_ = this->read_register(INPUT_REG, &inputs, 1, true)) != esphome::i2c::ERROR_OK) {
|
|
this->status_set_warning();
|
|
ESP_LOGE(TAG, "read_register_(): I2C I/O error: %d", (int) this->last_error_);
|
|
return false;
|
|
}
|
|
this->status_clear_warning();
|
|
this->input_mask_ = inputs;
|
|
return true;
|
|
}
|
|
|
|
bool PCA9554Component::write_register_(uint8_t reg, uint8_t value) {
|
|
if ((this->last_error_ = this->write_register(reg, &value, 1, true)) != esphome::i2c::ERROR_OK) {
|
|
this->status_set_warning();
|
|
ESP_LOGE(TAG, "write_register_(): I2C I/O error: %d", (int) this->last_error_);
|
|
return false;
|
|
}
|
|
|
|
this->status_clear_warning();
|
|
return true;
|
|
}
|
|
|
|
float PCA9554Component::get_setup_priority() const { return setup_priority::IO; }
|
|
|
|
void PCA9554GPIOPin::setup() { pin_mode(flags_); }
|
|
void PCA9554GPIOPin::pin_mode(gpio::Flags flags) { this->parent_->pin_mode(this->pin_, flags); }
|
|
bool PCA9554GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
|
|
void PCA9554GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
|
|
std::string PCA9554GPIOPin::dump_summary() const {
|
|
char buffer[32];
|
|
snprintf(buffer, sizeof(buffer), "%u via PCA9554", pin_);
|
|
return buffer;
|
|
}
|
|
|
|
} // namespace pca9554
|
|
} // namespace esphome
|