xl9535.cpp

Go to the documentation of this file.

#include "xl9535.h"
#include "esphome/core/log.h"
 
namespace esphome::xl9535 {
 
ESPHOME_LOG_TAG(TAG, "xl9535");
 
void XL9535Component::setup() {
  // Check to see if the device can read from the register
  uint8_t port = 0;
  if (this->read_register(XL9535_INPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
    this->mark_failed(LOG_STR(ESP_LOG_MSG_COMM_FAIL));
    return;
  }
}
 
void XL9535Component::dump_config() {
  ESP_LOGCONFIG(TAG, "XL9535:");
  LOG_I2C_DEVICE(this);
}
 
bool XL9535Component::digital_read(uint8_t pin) {
  bool state = false;
  uint8_t port = 0;
 
  if (pin > 7) {
    if (this->read_register(XL9535_INPUT_PORT_1_REGISTER, &port, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return state;
    }
 
    state = (port & (1 << (pin - 10))) != 0;
  } else {
    if (this->read_register(XL9535_INPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return state;
    }
 
    state = (port & (1 << pin)) != 0;
  }
 
  this->status_clear_warning();
  return state;
}
 
void XL9535Component::digital_write(uint8_t pin, bool value) {
  uint8_t port = 0;
  uint8_t register_data = 0;
 
  if (pin > 7) {
    if (this->read_register(XL9535_OUTPUT_PORT_1_REGISTER, &register_data, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return;
    }
 
    register_data = register_data & (~(1 << (pin - 10)));
    port = register_data | value << (pin - 10);
 
    if (this->write_register(XL9535_OUTPUT_PORT_1_REGISTER, &port, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return;
    }
  } else {
    if (this->read_register(XL9535_OUTPUT_PORT_0_REGISTER, &register_data, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return;
    }
    register_data = register_data & (~(1 << pin));
    port = register_data | value << pin;
 
    if (this->write_register(XL9535_OUTPUT_PORT_0_REGISTER, &port, 1) != i2c::ERROR_OK) {
      this->status_set_warning();
      return;
    }
  }
 
  this->status_clear_warning();
}
 
void XL9535Component::pin_mode(uint8_t pin, gpio::Flags mode) {
  uint8_t port = 0;
 
  if (pin > 7) {
    this->read_register(XL9535_CONFIG_PORT_1_REGISTER, &port, 1);
 
    if (mode == gpio::FLAG_INPUT) {
      port = port | (1 << (pin - 10));
    } else if (mode == gpio::FLAG_OUTPUT) {
      port = port & (~(1 << (pin - 10)));
    }
 
    this->write_register(XL9535_CONFIG_PORT_1_REGISTER, &port, 1);
  } else {
    this->read_register(XL9535_CONFIG_PORT_0_REGISTER, &port, 1);
 
    if (mode == gpio::FLAG_INPUT) {
      port = port | (1 << pin);
    } else if (mode == gpio::FLAG_OUTPUT) {
      port = port & (~(1 << pin));
    }
 
    this->write_register(XL9535_CONFIG_PORT_0_REGISTER, &port, 1);
  }
}
 
}  // namespace esphome::xl9535
 
ESPHOME_EXPANDER_PIN_SUMMARY(esphome::xl9535::XL9535Component, "%u via XL9535")