mirror of
https://github.com/esphome/esphome.git
synced 2024-12-02 11:44:13 +01:00
9c30f4cc68
* Fix for PCF8574 output chattering at the start/reboot * Fix for PCF8574 output chattering at the start/reboot * Fix for PCF8574 output chattering at the start/reboot Co-authored-by: Amish Vishwakarma <vishwakarma.amish@gmai.com>
111 lines
3.1 KiB
C++
111 lines
3.1 KiB
C++
#include "pcf8574.h"
|
|
#include "esphome/core/log.h"
|
|
|
|
namespace esphome {
|
|
namespace pcf8574 {
|
|
|
|
static const char *TAG = "pcf8574";
|
|
|
|
void PCF8574Component::setup() {
|
|
ESP_LOGCONFIG(TAG, "Setting up PCF8574...");
|
|
if (!this->read_gpio_()) {
|
|
ESP_LOGE(TAG, "PCF8574 not available under 0x%02X", this->address_);
|
|
this->mark_failed();
|
|
return;
|
|
}
|
|
|
|
this->write_gpio_();
|
|
this->read_gpio_();
|
|
}
|
|
void PCF8574Component::dump_config() {
|
|
ESP_LOGCONFIG(TAG, "PCF8574:");
|
|
LOG_I2C_DEVICE(this)
|
|
ESP_LOGCONFIG(TAG, " Is PCF8575: %s", YESNO(this->pcf8575_));
|
|
if (this->is_failed()) {
|
|
ESP_LOGE(TAG, "Communication with PCF8574 failed!");
|
|
}
|
|
}
|
|
bool PCF8574Component::digital_read(uint8_t pin) {
|
|
this->read_gpio_();
|
|
return this->input_mask_ & (1 << pin);
|
|
}
|
|
void PCF8574Component::digital_write(uint8_t pin, bool value) {
|
|
if (value) {
|
|
this->port_mask_ |= (1 << pin);
|
|
} else {
|
|
this->port_mask_ &= ~(1 << pin);
|
|
}
|
|
|
|
this->write_gpio_();
|
|
}
|
|
void PCF8574Component::pin_mode(uint8_t pin, uint8_t mode) {
|
|
switch (mode) {
|
|
case PCF8574_INPUT:
|
|
this->ddr_mask_ &= ~(1 << pin);
|
|
this->port_mask_ &= ~(1 << pin);
|
|
break;
|
|
case PCF8574_INPUT_PULLUP:
|
|
this->ddr_mask_ &= ~(1 << pin);
|
|
this->port_mask_ |= (1 << pin);
|
|
break;
|
|
case PCF8574_OUTPUT:
|
|
this->ddr_mask_ |= (1 << pin);
|
|
this->port_mask_ &= ~(1 << pin);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
bool PCF8574Component::read_gpio_() {
|
|
if (this->is_failed())
|
|
return false;
|
|
|
|
if (this->pcf8575_) {
|
|
if (!this->parent_->raw_receive_16(this->address_, &this->input_mask_, 1)) {
|
|
this->status_set_warning();
|
|
return false;
|
|
}
|
|
} else {
|
|
uint8_t data;
|
|
if (!this->parent_->raw_receive(this->address_, &data, 1)) {
|
|
this->status_set_warning();
|
|
return false;
|
|
}
|
|
this->input_mask_ = data;
|
|
}
|
|
|
|
this->status_clear_warning();
|
|
return true;
|
|
}
|
|
bool PCF8574Component::write_gpio_() {
|
|
if (this->is_failed())
|
|
return false;
|
|
|
|
uint16_t value = (this->input_mask_ & ~this->ddr_mask_) | this->port_mask_;
|
|
|
|
this->parent_->raw_begin_transmission(this->address_);
|
|
uint8_t data = value & 0xFF;
|
|
this->parent_->raw_write(this->address_, &data, 1);
|
|
|
|
if (this->pcf8575_) {
|
|
data = (value >> 8) & 0xFF;
|
|
this->parent_->raw_write(this->address_, &data, 1);
|
|
}
|
|
if (!this->parent_->raw_end_transmission(this->address_)) {
|
|
this->status_set_warning();
|
|
return false;
|
|
}
|
|
this->status_clear_warning();
|
|
return true;
|
|
}
|
|
float PCF8574Component::get_setup_priority() const { return setup_priority::IO; }
|
|
|
|
void PCF8574GPIOPin::setup() { this->pin_mode(this->mode_); }
|
|
bool PCF8574GPIOPin::digital_read() { return this->parent_->digital_read(this->pin_) != this->inverted_; }
|
|
void PCF8574GPIOPin::digital_write(bool value) { this->parent_->digital_write(this->pin_, value != this->inverted_); }
|
|
void PCF8574GPIOPin::pin_mode(uint8_t mode) { this->parent_->pin_mode(this->pin_, mode); }
|
|
PCF8574GPIOPin::PCF8574GPIOPin(PCF8574Component *parent, uint8_t pin, uint8_t mode, bool inverted)
|
|
: GPIOPin(pin, mode, inverted), parent_(parent) {}
|
|
|
|
} // namespace pcf8574
|
|
} // namespace esphome
|