mcp23017.cpp

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#include "mcp23017.h"
#include "esphome/core/log.h"
 
namespace esphome {
namespace mcp23017 {
 
static const char *const TAG = "mcp23017";
 
void MCP23017::setup() {
  ESP_LOGCONFIG(TAG, "Setting up MCP23017...");
  uint8_t iocon;
  if (!this->read_reg(mcp23x17_base::MCP23X17_IOCONA, &iocon)) {
    this->mark_failed();
    return;
  }
 
  // Read current output register state
  this->read_reg(mcp23x17_base::MCP23X17_OLATA, &this->olat_a_);
  this->read_reg(mcp23x17_base::MCP23X17_OLATB, &this->olat_b_);
 
  if (this->open_drain_ints_) {
    // enable open-drain interrupt pins, 3.3V-safe
    this->write_reg(mcp23x17_base::MCP23X17_IOCONA, 0x04);
    this->write_reg(mcp23x17_base::MCP23X17_IOCONB, 0x04);
  }
}
 
void MCP23017::dump_config() { ESP_LOGCONFIG(TAG, "MCP23017:"); }
 
bool MCP23017::read_reg(uint8_t reg, uint8_t *value) {
  if (this->is_failed())
    return false;
 
  return this->read_byte(reg, value);
}
bool MCP23017::write_reg(uint8_t reg, uint8_t value) {
  if (this->is_failed())
    return false;
 
  return this->write_byte(reg, value);
}
 
}  // namespace mcp23017
}  // namespace esphome